PURPOSE
Several of Dyplast’s prior Technical Bulletins have provided in-depth comparisons of various insulants, including polyisocyanurate (polyiso or PIR), polyurethane (PUR), phenolic, polystyrene (expanded EPS and extruded XPS), cellular glass, and fiberglass - - as well as less-than-comprehensive comparisons with elastomeric and aerogel. Now with somewhat more information becoming available from elastomeric manufacturers and the aggressive marketing from elastomeric suppliers for colder applications it is appropriate to dedicate a Technical Bulletin to elastomeric insulants as compared to polyisocyanurate - - and to a much lesser extent phenolic, and cellular glass.
Technical Bulletin 0418 Polyiso vs. XPS Pipe Insulation SystemsJoe Hughes
Dyplast’s 0214 Technical Bulletin was focused primarily on examining the cost of insulation systems versus energy savings and long-term performance of polyisocyanurate (polyiso or PIR) and extruded polystyrene (XPS) insulants in low-temperature applications such as refrigeration and chilled water applications. It’s no surprise that polyisocyanurate was the hands-down selection based purely on physical properties, cost, and demonstrated thermal efficiencies in practice.
Customer Bulletin 0310 A Comparison of ISO-C1 Polyisocyanurate Insulation to ...Joe Hughes
This document compares polyisocyanurate (polyiso) insulation to extruded polystyrene (XPS) insulation. It finds that polyiso delivers higher R-values per inch, is moisture and mold resistant, and maintains its shape better than XPS especially at low temperatures. Polyiso also performs better than XPS in fire tests as it forms a protective char layer rather than melting. Additionally, polyiso has a lower global warming potential and is more resistant to construction materials than XPS. The document is aimed at providing objective information to help customers, engineers and others compare insulation products.
Qwik-Guide PIR vs XPS Pipe Insulation 0518Joe Hughes
Dyplast’s 0214 Technical Bulletin was focused primarily on examining the cost of insulation systems versus energy savings and long-term performance of polyisocyanurate (polyiso or PIR) and extruded polystyrene (XPS) insulants in lowtemperature applications such as refrigeration and chilled water applications. It’s no surprise that polyisocyanurate was the handsdown selection based purely on physical properties, cost, and demonstrated thermal efficiencies in practice.
The document describes the DefenderTM FS gasket, which is designed to electrically isolate flanges while providing fire protection. It passed the API 6FB fire test, maintaining a leakage rate below specifications during a 30-minute burn, 30-minute cool down, and 5-minute re-pressurization cycle. The gasket incorporates proven Kammpro® sealing technology and is suitable for applications requiring high reliability sealing and isolation at high pressures and temperatures.
The Filoform Quicki range of Gel Joints are designed for use in outdoor, direct buried, and some submersible applications where moisture protection is critical. They are mainly used for unarmoured cables but can be used on some armoured cables with an armour continuity kit. The gel joints require no specialist tooling, have double seals for moisture protection, and have a high temperature resistant gel that works from -40°C to +140°C. They are suitable for jointing most cable types like XLPE, PVC, and EPR and include a gel filled shell, connector block, cable ties, and instructions.
Dry type bushings use silicone rubber insulation and resin impregnated fiber cores as an alternative to oil insulated bushings. They have several advantages including reduced risk of fire from oil leakage, easier transport and installation, immediate energization after installation, and reduced maintenance needs. Silicone rubber insulation is hydrophobic, reduces leakage currents, and has longer cleaning intervals than porcelain. Dry type bushings have no oil that can leak, contaminate, or burn, and no pressure vessel to rupture. They are suitable for areas with high seismic activity and have a long life.
This document summarizes a case study on replacing damaged and ice-laden ammonia refrigeration pipe insulation at a food processing plant. The original insulation system failed after 15 years, becoming saturated with ice and water. A new insulation contractor replaced the original extruded polystyrene foam and vapor retarder insulation with a higher performing polyolefin insulation and polyvinylidene chloride vapor retarder over 4,756 feet of pipe at a cost of $550,000. Thermal conductivity tests from other studies confirm insulation conductivity increases significantly with water content. An energy analysis was conducted to determine if the replacement was cost effective due to reduced energy losses.
Technical Bulletin 0418 Polyiso vs. XPS Pipe Insulation SystemsJoe Hughes
Dyplast’s 0214 Technical Bulletin was focused primarily on examining the cost of insulation systems versus energy savings and long-term performance of polyisocyanurate (polyiso or PIR) and extruded polystyrene (XPS) insulants in low-temperature applications such as refrigeration and chilled water applications. It’s no surprise that polyisocyanurate was the hands-down selection based purely on physical properties, cost, and demonstrated thermal efficiencies in practice.
Customer Bulletin 0310 A Comparison of ISO-C1 Polyisocyanurate Insulation to ...Joe Hughes
This document compares polyisocyanurate (polyiso) insulation to extruded polystyrene (XPS) insulation. It finds that polyiso delivers higher R-values per inch, is moisture and mold resistant, and maintains its shape better than XPS especially at low temperatures. Polyiso also performs better than XPS in fire tests as it forms a protective char layer rather than melting. Additionally, polyiso has a lower global warming potential and is more resistant to construction materials than XPS. The document is aimed at providing objective information to help customers, engineers and others compare insulation products.
Qwik-Guide PIR vs XPS Pipe Insulation 0518Joe Hughes
Dyplast’s 0214 Technical Bulletin was focused primarily on examining the cost of insulation systems versus energy savings and long-term performance of polyisocyanurate (polyiso or PIR) and extruded polystyrene (XPS) insulants in lowtemperature applications such as refrigeration and chilled water applications. It’s no surprise that polyisocyanurate was the handsdown selection based purely on physical properties, cost, and demonstrated thermal efficiencies in practice.
The document describes the DefenderTM FS gasket, which is designed to electrically isolate flanges while providing fire protection. It passed the API 6FB fire test, maintaining a leakage rate below specifications during a 30-minute burn, 30-minute cool down, and 5-minute re-pressurization cycle. The gasket incorporates proven Kammpro® sealing technology and is suitable for applications requiring high reliability sealing and isolation at high pressures and temperatures.
The Filoform Quicki range of Gel Joints are designed for use in outdoor, direct buried, and some submersible applications where moisture protection is critical. They are mainly used for unarmoured cables but can be used on some armoured cables with an armour continuity kit. The gel joints require no specialist tooling, have double seals for moisture protection, and have a high temperature resistant gel that works from -40°C to +140°C. They are suitable for jointing most cable types like XLPE, PVC, and EPR and include a gel filled shell, connector block, cable ties, and instructions.
Dry type bushings use silicone rubber insulation and resin impregnated fiber cores as an alternative to oil insulated bushings. They have several advantages including reduced risk of fire from oil leakage, easier transport and installation, immediate energization after installation, and reduced maintenance needs. Silicone rubber insulation is hydrophobic, reduces leakage currents, and has longer cleaning intervals than porcelain. Dry type bushings have no oil that can leak, contaminate, or burn, and no pressure vessel to rupture. They are suitable for areas with high seismic activity and have a long life.
This document summarizes a case study on replacing damaged and ice-laden ammonia refrigeration pipe insulation at a food processing plant. The original insulation system failed after 15 years, becoming saturated with ice and water. A new insulation contractor replaced the original extruded polystyrene foam and vapor retarder insulation with a higher performing polyolefin insulation and polyvinylidene chloride vapor retarder over 4,756 feet of pipe at a cost of $550,000. Thermal conductivity tests from other studies confirm insulation conductivity increases significantly with water content. An energy analysis was conducted to determine if the replacement was cost effective due to reduced energy losses.
This document provides information on thermal barriers and ignition barriers for the spray polyurethane foam industry. It defines what thermal barriers and ignition barriers are, where they are required by building codes, and options for selecting them. Thermal barriers are meant to prevent involvement of foam in a fire by limiting temperature rise, while ignition barriers provide some protection but are only allowed in attics and crawlspaces. Prescriptive options and tested alternative assemblies that meet code requirements are outlined. The document aims to help specifiers choose compliant foam and barrier systems.
6 ways copolyesters can improve your insulation foamsFibrecore
Most insulation foams don't perform to the highest specifications because their cell structure causes poor dimensional and heat stability.
The EMS Griltex range of copolyesters improves the long-term thermal stability, the dimensional stability (by reducing shrinkage and expansion) and compatibility with common adhesives like EVA.
What's more, the Griltex range can be used to replace PVC in NBR/PVC compounds, reduce water vapour permeability end encourage the formation of smaller cells.
The EMS Griltex range is available exclusively in the UK through Fibrecore.uk.com. For details, contact Tom Mallens on tom@fibrecore.uk.com.
This document summarizes a new mesh-free epoxy passive fire protection coating called Jotachar JF750. Traditional epoxy PFP systems require additional mesh reinforcement which introduces risks if not installed correctly. Jotachar JF750 eliminates this risk by incorporating an advanced fiber matrix, removing the need for mesh. It provides robust fire protection while significantly reducing installation time and costs compared to mesh-containing systems. Extensive testing shows Jotachar JF750 meets industry standards and certification requirements.
Various NEMA electrical enclosures are available based on the kind of protection required. In this PPT you will find how to select the right electrical enclosure
Solutions to Address Osmosis and the Blistering of Liquid-Applied Waterproofi...RDH Building Science
Waterproofing membranes are widely used in the building industry as a barrier for water entry into a building enclosure. Over the past two decades, waterproofing system failure due to osmotic blistering has occurred in some protected membrane/inverted roofing assemblies. Not all waterproofing membrane assemblies are at risk for this process and the authors have developed a test protocol to establish the relative risk level of waterproofing membranes to osmosis. Using this protocol, the osmotic flow rate of SBS, hot rubberized asphalt, PMMA, EPDM, TPO, HDPE, polyurea, asphalt emulsion, asphalt-modified polyurethane, and various other 2-component cold applied membranes was measured to determine a threshold osmotic flow rate for low risk waterproofing membrane systems.
In this research, a wide range of osmotic flow rates were obtained for the various membrane types. Most asphalt-modified polyurethane membranes consistently exhibit osmotic flow rates significantly higher than the low-risk threshold of ~0.0 g/m²/day (typically 1.4 to over 20 g/m²/day) after data corrections, which results in osmotic blistering and premature membrane failures. Some polyurea and asphalt emulsion membranes have flow rates above 2.0 g/m²/day with unknown long-term performance, while most other membranes that were tested have flow rates around 0.0 g/m²/day after data corrections from control samples. To reduce the potential for osmotic blistering over concrete, it is recommended that waterproofing membranes used in inverted roofing assemblies should have an osmotic flow rate near 0.0 g/m²/day when tested using the methodology herein, an inverted wet cup vapour permeance less than that of the substrate (i.e. <0.1 US Perms on a concrete substrate), and minimal long-term water absorption.
Presented at the 15th Canadian Conference on Building Science and Technology.
The document summarizes the Filoform Quicki range of Gel Joints, which have been designed and tested to provide moisture protection for small conductors in outdoor, buried, and some submersible applications. The gel joints do not require specialist tooling, provide double sealing for moisture protection, and can withstand temperatures between -40°C to +140°C. They are suitable for jointing most cable types like XLPE, PVC, and EPR, and come with a connector block, cable ties, and mounting instructions.
Sealing for Improved Aviation, Space & Defense Equipment PerformanceBSEmarketing
The saying goes, “Learning from someone else’s mistakes is easy, but learning from your own is hard.”
We hope you’ll leverage our 60-plus years of application experience to avoid some common pitfalls as you prepare to seal your next aviation, space, or defense design.
Check out the short presentation we’ve prepared for you here. It dives into sealing in aviation, defense, and space equipment, and suggests ways to achieve a balance between friction and sealing effectiveness.
Once you have a chance to review the presentation, let’s talk about how we can help you elevate your new or existing project.
Gore performed temperature cycling tests on four identical junction boxes to evaluate the performance of GORE Protective Vents. The tests subjected the boxes to extreme temperature fluctuations over 10 days. Boxes with vents maintained constant internal pressure and reduced humidity levels. Unvented boxes experienced seal failure and increased humidity, demonstrating the importance of ventilation for extending product life in harsh environments.
Overcoming SWaP Challenges With Canted Coil SpringsBSEmarketing
This document discusses how canted coil springs can help overcome size, weight, and power (SWaP) challenges in electrical connectors. Canted coil springs can serve multiple functions by providing latching, conducting electricity, and electromagnetic interference/radio frequency interference (EMI/RFI) shielding in a single compact component. They conduct high currents efficiently in a small space without overheating. Springs are customizable for unique applications and can be made from various conductive materials to meet requirements. The document provides examples of how canted coil springs are used in connectors for commercial aviation, military aviation, and recommends early collaboration with spring engineers to design connector components that meet all system needs.
Built-in Novel Insulation Monitoring Function for RIF Paperless Transformer B...Gururaj B Rawoor
This seminar discusses novel insulation monitoring functions for resin impregnated fiberglass (RIF) paperless transformer bushings. It compares traditional oil, resin, and RIF bushings and highlights advantages of RIF bushings like mechanical strength and maintenance-free operation. New N-RIF bushings add built-in monitoring capabilities by using two capacitors - a main insulation capacitance and larger grading layer capacitance. Connecting monitoring terminals to the grading layer allows online monitoring of insulation conditions without impacting performance or requiring external power. This provides early detection of faults to prevent failures and allows scheduled maintenance.
LNG Industry Magazine (Logical Thinking) Feb 2016Dyplast Products
Dyplast Products’ new article in LNG Industry Magazine titled "Logical Thinking" is an examination of the complexities surrounding insulant performance at cryogenic temperatures.
Physical properties of a particular insulant are often measured only at ambient temperatures. This article aims to use logical thinking to examine the performance of insulants at LNG (cryogenic) temperatures.
Fortunately, standards such as ASTM and CINI increasingly require physical properties to be measured at cryogenic temperatures, so that in the future such logical extrapolations may be less necessary.
Titan Out Engineering Solution of Wall Sealing Refrigerant Line Penetrations ...Airex Manufacturing Inc
The Titan Outlet is the engineered solution of wall sealing refrigerant line penetrations featuring a weather & air leakage resistant, vibration control, rodent proofing, wall enclosure system. Air Leakage Wall Seal, Protect Indoor Air Quality! @NAHB #HVAC http://www.airexmfg.com/titan
We manufacture component products for the outdoor #HVAC equipment piping area,designed & engineered to support #sustainable #energy efficient system performance
The Titan Outlet is the engineered solution of wall sealing refrigerant line penetrations featuring a weather and air leakage resistant, vibration control, rodent proofing, wall enclosure system, and has become the preferred industry leader. http://airexmfg.com/titan/
Mounting Considerations for International Rectifier’s Power Semiconductor Pac...ZunAib Ali
This document provides guidelines for correctly mounting power semiconductor packages to achieve good thermal and mechanical performance. Incorrect mounting can lead to thermal and mechanical problems. Key points discussed include:
- Ensuring good thermal contact between the package and heat sink by applying adequate mounting force while avoiding overtightening, and using thermal interface materials like grease or pads.
- For TO-220 packages specifically, mounting procedures like screw mounting, clip mounting and lead bending techniques are described. General rules around isolation and avoiding mechanical damage are also covered.
- Other package types have mounting considerations discussed in subsequent sections, while links to thermal interface material suppliers are also provided. Proper mounting is critical for power packages to dissipate heat and achieve
This document discusses heat tracing methods and products from DGB-co.com. It describes various heat tracing applications for liquids and gases to prevent freezing and enable pumping. Methods discussed include circulating fluids like steam and electric tracing options like self-regulating cable, mineral-insulated cable, and skin-effect tracing. Specific BARTEC heat tracing products are also summarized, including self-limiting tapes, EKL heating cables, and EMK mineral-insulated cables. Installation examples show applications for pipes, tanks, vessels, and other industrial equipment.
The Titan Outlet is the engineered solution of wall sealing refrigerant line penetrations featuring a weather & air leakage resistant, vibration control, rodent proofing, wall enclosure system. Air Leakage Wall Seal, Protect Indoor Air Quality! @NAHB #HVAC http://www.airexmfg.com/titan
This document provides information on casing spacers and end seals produced by CCI Pipeline Systems for pipe protection. It describes the company's models of casing spacers which include stainless steel, carbon steel, polyethylene, and heat shrinkable end seal options. Key details are provided on materials, applications, advantages over wood skids, ordering information, and warranty. The document aims to inform customers on CCI's full line of casing spacer and end seal products for concrete, PVC, ductile iron, polyethylene, and steel cased pipeline crossing applications.
This document summarizes the evolution of international society from ancient times to the modern era. It discusses key concepts like sovereign equality and non-intervention that form the basis of modern international society established by the Peace of Westphalia in 1648. The document then outlines how international society has globalized over time through decolonization, the end of the Cold War, and increasing challenges from globalization. It concludes by briefly introducing a case study on the Iranian Revolution of 1979.
South Korea has a rich culture and history. It has a developed economy and democratic government. The document provides an overview of key aspects of South Korean society, culture, sports, tourism, nature, history, constitution, and economy.
The article discusses lessons that could be learned from South Africa's democratic transition and applied to resolving the Palestine-Israel conflict. It notes that South Africa experienced 50 years of racial segregation policies before transitioning to democracy. Key factors in South Africa's transition included the ANC's strategy of non-violent civil disobedience, international pressure and sanctions on South Africa, and ultimately a negotiated political settlement and power sharing agreement. The article suggests these lessons could provide a model for resolving the long-standing Israel-Palestine conflict through non-violent action and an eventual negotiated political settlement.
This document discusses an app called PARCHEGGIAMI that allows users to book parking spaces through their mobile device. It saves users time and money by allowing them to search, find, and book parking options near their destination. The app takes a 10% commission on each booking and generates revenue of over 1 million euros annually based on over 400,000 bookings at an average fee of 3 euros per booking. It provides a marketplace for people to rent out unused parking spaces and competes with both municipal parking and alternative transportation options.
This document provides information on thermal barriers and ignition barriers for the spray polyurethane foam industry. It defines what thermal barriers and ignition barriers are, where they are required by building codes, and options for selecting them. Thermal barriers are meant to prevent involvement of foam in a fire by limiting temperature rise, while ignition barriers provide some protection but are only allowed in attics and crawlspaces. Prescriptive options and tested alternative assemblies that meet code requirements are outlined. The document aims to help specifiers choose compliant foam and barrier systems.
6 ways copolyesters can improve your insulation foamsFibrecore
Most insulation foams don't perform to the highest specifications because their cell structure causes poor dimensional and heat stability.
The EMS Griltex range of copolyesters improves the long-term thermal stability, the dimensional stability (by reducing shrinkage and expansion) and compatibility with common adhesives like EVA.
What's more, the Griltex range can be used to replace PVC in NBR/PVC compounds, reduce water vapour permeability end encourage the formation of smaller cells.
The EMS Griltex range is available exclusively in the UK through Fibrecore.uk.com. For details, contact Tom Mallens on tom@fibrecore.uk.com.
This document summarizes a new mesh-free epoxy passive fire protection coating called Jotachar JF750. Traditional epoxy PFP systems require additional mesh reinforcement which introduces risks if not installed correctly. Jotachar JF750 eliminates this risk by incorporating an advanced fiber matrix, removing the need for mesh. It provides robust fire protection while significantly reducing installation time and costs compared to mesh-containing systems. Extensive testing shows Jotachar JF750 meets industry standards and certification requirements.
Various NEMA electrical enclosures are available based on the kind of protection required. In this PPT you will find how to select the right electrical enclosure
Solutions to Address Osmosis and the Blistering of Liquid-Applied Waterproofi...RDH Building Science
Waterproofing membranes are widely used in the building industry as a barrier for water entry into a building enclosure. Over the past two decades, waterproofing system failure due to osmotic blistering has occurred in some protected membrane/inverted roofing assemblies. Not all waterproofing membrane assemblies are at risk for this process and the authors have developed a test protocol to establish the relative risk level of waterproofing membranes to osmosis. Using this protocol, the osmotic flow rate of SBS, hot rubberized asphalt, PMMA, EPDM, TPO, HDPE, polyurea, asphalt emulsion, asphalt-modified polyurethane, and various other 2-component cold applied membranes was measured to determine a threshold osmotic flow rate for low risk waterproofing membrane systems.
In this research, a wide range of osmotic flow rates were obtained for the various membrane types. Most asphalt-modified polyurethane membranes consistently exhibit osmotic flow rates significantly higher than the low-risk threshold of ~0.0 g/m²/day (typically 1.4 to over 20 g/m²/day) after data corrections, which results in osmotic blistering and premature membrane failures. Some polyurea and asphalt emulsion membranes have flow rates above 2.0 g/m²/day with unknown long-term performance, while most other membranes that were tested have flow rates around 0.0 g/m²/day after data corrections from control samples. To reduce the potential for osmotic blistering over concrete, it is recommended that waterproofing membranes used in inverted roofing assemblies should have an osmotic flow rate near 0.0 g/m²/day when tested using the methodology herein, an inverted wet cup vapour permeance less than that of the substrate (i.e. <0.1 US Perms on a concrete substrate), and minimal long-term water absorption.
Presented at the 15th Canadian Conference on Building Science and Technology.
The document summarizes the Filoform Quicki range of Gel Joints, which have been designed and tested to provide moisture protection for small conductors in outdoor, buried, and some submersible applications. The gel joints do not require specialist tooling, provide double sealing for moisture protection, and can withstand temperatures between -40°C to +140°C. They are suitable for jointing most cable types like XLPE, PVC, and EPR, and come with a connector block, cable ties, and mounting instructions.
Sealing for Improved Aviation, Space & Defense Equipment PerformanceBSEmarketing
The saying goes, “Learning from someone else’s mistakes is easy, but learning from your own is hard.”
We hope you’ll leverage our 60-plus years of application experience to avoid some common pitfalls as you prepare to seal your next aviation, space, or defense design.
Check out the short presentation we’ve prepared for you here. It dives into sealing in aviation, defense, and space equipment, and suggests ways to achieve a balance between friction and sealing effectiveness.
Once you have a chance to review the presentation, let’s talk about how we can help you elevate your new or existing project.
Gore performed temperature cycling tests on four identical junction boxes to evaluate the performance of GORE Protective Vents. The tests subjected the boxes to extreme temperature fluctuations over 10 days. Boxes with vents maintained constant internal pressure and reduced humidity levels. Unvented boxes experienced seal failure and increased humidity, demonstrating the importance of ventilation for extending product life in harsh environments.
Overcoming SWaP Challenges With Canted Coil SpringsBSEmarketing
This document discusses how canted coil springs can help overcome size, weight, and power (SWaP) challenges in electrical connectors. Canted coil springs can serve multiple functions by providing latching, conducting electricity, and electromagnetic interference/radio frequency interference (EMI/RFI) shielding in a single compact component. They conduct high currents efficiently in a small space without overheating. Springs are customizable for unique applications and can be made from various conductive materials to meet requirements. The document provides examples of how canted coil springs are used in connectors for commercial aviation, military aviation, and recommends early collaboration with spring engineers to design connector components that meet all system needs.
Built-in Novel Insulation Monitoring Function for RIF Paperless Transformer B...Gururaj B Rawoor
This seminar discusses novel insulation monitoring functions for resin impregnated fiberglass (RIF) paperless transformer bushings. It compares traditional oil, resin, and RIF bushings and highlights advantages of RIF bushings like mechanical strength and maintenance-free operation. New N-RIF bushings add built-in monitoring capabilities by using two capacitors - a main insulation capacitance and larger grading layer capacitance. Connecting monitoring terminals to the grading layer allows online monitoring of insulation conditions without impacting performance or requiring external power. This provides early detection of faults to prevent failures and allows scheduled maintenance.
LNG Industry Magazine (Logical Thinking) Feb 2016Dyplast Products
Dyplast Products’ new article in LNG Industry Magazine titled "Logical Thinking" is an examination of the complexities surrounding insulant performance at cryogenic temperatures.
Physical properties of a particular insulant are often measured only at ambient temperatures. This article aims to use logical thinking to examine the performance of insulants at LNG (cryogenic) temperatures.
Fortunately, standards such as ASTM and CINI increasingly require physical properties to be measured at cryogenic temperatures, so that in the future such logical extrapolations may be less necessary.
Titan Out Engineering Solution of Wall Sealing Refrigerant Line Penetrations ...Airex Manufacturing Inc
The Titan Outlet is the engineered solution of wall sealing refrigerant line penetrations featuring a weather & air leakage resistant, vibration control, rodent proofing, wall enclosure system. Air Leakage Wall Seal, Protect Indoor Air Quality! @NAHB #HVAC http://www.airexmfg.com/titan
We manufacture component products for the outdoor #HVAC equipment piping area,designed & engineered to support #sustainable #energy efficient system performance
The Titan Outlet is the engineered solution of wall sealing refrigerant line penetrations featuring a weather and air leakage resistant, vibration control, rodent proofing, wall enclosure system, and has become the preferred industry leader. http://airexmfg.com/titan/
Mounting Considerations for International Rectifier’s Power Semiconductor Pac...ZunAib Ali
This document provides guidelines for correctly mounting power semiconductor packages to achieve good thermal and mechanical performance. Incorrect mounting can lead to thermal and mechanical problems. Key points discussed include:
- Ensuring good thermal contact between the package and heat sink by applying adequate mounting force while avoiding overtightening, and using thermal interface materials like grease or pads.
- For TO-220 packages specifically, mounting procedures like screw mounting, clip mounting and lead bending techniques are described. General rules around isolation and avoiding mechanical damage are also covered.
- Other package types have mounting considerations discussed in subsequent sections, while links to thermal interface material suppliers are also provided. Proper mounting is critical for power packages to dissipate heat and achieve
This document discusses heat tracing methods and products from DGB-co.com. It describes various heat tracing applications for liquids and gases to prevent freezing and enable pumping. Methods discussed include circulating fluids like steam and electric tracing options like self-regulating cable, mineral-insulated cable, and skin-effect tracing. Specific BARTEC heat tracing products are also summarized, including self-limiting tapes, EKL heating cables, and EMK mineral-insulated cables. Installation examples show applications for pipes, tanks, vessels, and other industrial equipment.
The Titan Outlet is the engineered solution of wall sealing refrigerant line penetrations featuring a weather & air leakage resistant, vibration control, rodent proofing, wall enclosure system. Air Leakage Wall Seal, Protect Indoor Air Quality! @NAHB #HVAC http://www.airexmfg.com/titan
This document provides information on casing spacers and end seals produced by CCI Pipeline Systems for pipe protection. It describes the company's models of casing spacers which include stainless steel, carbon steel, polyethylene, and heat shrinkable end seal options. Key details are provided on materials, applications, advantages over wood skids, ordering information, and warranty. The document aims to inform customers on CCI's full line of casing spacer and end seal products for concrete, PVC, ductile iron, polyethylene, and steel cased pipeline crossing applications.
This document summarizes the evolution of international society from ancient times to the modern era. It discusses key concepts like sovereign equality and non-intervention that form the basis of modern international society established by the Peace of Westphalia in 1648. The document then outlines how international society has globalized over time through decolonization, the end of the Cold War, and increasing challenges from globalization. It concludes by briefly introducing a case study on the Iranian Revolution of 1979.
South Korea has a rich culture and history. It has a developed economy and democratic government. The document provides an overview of key aspects of South Korean society, culture, sports, tourism, nature, history, constitution, and economy.
The article discusses lessons that could be learned from South Africa's democratic transition and applied to resolving the Palestine-Israel conflict. It notes that South Africa experienced 50 years of racial segregation policies before transitioning to democracy. Key factors in South Africa's transition included the ANC's strategy of non-violent civil disobedience, international pressure and sanctions on South Africa, and ultimately a negotiated political settlement and power sharing agreement. The article suggests these lessons could provide a model for resolving the long-standing Israel-Palestine conflict through non-violent action and an eventual negotiated political settlement.
This document discusses an app called PARCHEGGIAMI that allows users to book parking spaces through their mobile device. It saves users time and money by allowing them to search, find, and book parking options near their destination. The app takes a 10% commission on each booking and generates revenue of over 1 million euros annually based on over 400,000 bookings at an average fee of 3 euros per booking. It provides a marketplace for people to rent out unused parking spaces and competes with both municipal parking and alternative transportation options.
The document provides information on multi-word verbs, roles and responsibilities in film production, giving factual talks, and vocabulary related to ways, routes, and directions. It defines multi-word verbs as verbs combined with prepositions or adverbs, and provides examples. It also outlines typical responsibilities of different roles in film production like the director and camera operator. Guidelines are given for structuring a factual talk, including outlining the topics and transitions between them. Finally, different uses of the word "way" are described.
This document lists various electronics brands and product categories including digital photography brands Canon and Raynox, computer accessories brands Toshiba, Logitech, and Transcend, and home appliance brands including Panasonic, Revlon, and Remington. It also includes a table comparing specifications of different sized LED TVs ranging from 19" to 80" and descriptions of their screen sizes, resolutions, backlighting, viewing angles, and aspect ratios. Finally, it describes a new retro LED TV that fits various standard LED/LCD/plasma mounting hole sizes up to 400x400mm.
Unique Concept of cold press juices just wash fruits & vegetables and directly put in whole slow juicer without use of knife,, peeler, deseeded etc. The taste of juice made of this juicer is unmatched
While extracting juice 95% nutrient value is retained
Enzymes , vitamins and Minerals are not killed as this juicer is blade free and works on cold press masticating technology. No heat is generated during the process of juicing
This document provides instructions for a knife skills lesson that teaches students how to correctly dice vegetables. It includes a pre-lesson quiz about knife cuts and knife safety. The lesson objectives are to demonstrate proper knife grip and cutting techniques as well as prepare a bruschetta recipe. Students watch a demonstration of the recipe and then practice making it in groups. At the end, they write a one-minute summary of what they learned and what skills need more practice.
This document discusses excess hair growth. It defines terms like hirsutism, which refers to masculine hair growth patterns in women caused by excess androgen levels. Hypertrichosis refers to generalized increased hair growth all over the body. There are three main causes of excess hair growth: congenital (inherited hair growth patterns), topical (stimulation or friction causing increased growth), and systemic (caused by normal or abnormal hormonal changes). Normal systemic causes include puberty, pregnancy, and menopause, while abnormal causes can be endocrine disorders.
Sandra Maddock & Brandy Smith BioEnterprise Presentation 9.6.12IMARC Research
The document provides an agenda for a presentation on the differences between clinical trials for drugs and devices, including an overview of drugs and devices, determining the need for a clinical trial, regulatory overview, clinical trial similarities, and clinical trial differences. It outlines topics such as risk classifications for devices, investigator responsibilities, and agreements between sponsors and investigators. The presentation aims to highlight both the similarities and differences in conducting clinical research on drugs versus medical devices.
Paid search involves building targeted ad groups for relevant search queries with customized ad text and landing pages. Key factors for success include using broad and exact match keywords, analyzing converting queries, and creating compelling ads and pages that connect with searchers and provide a matching, competitive offer.
An introduction to the potential of social networking sites in edKhairul Nisa
This paper reviews the potential uses of social networking sites (SNS) like Facebook and MySpace in education. It examines the characteristics and membership rules of popular SNS and compares Facebook and MySpace to evaluate privacy and trust issues. The paper finds that while SNS allow for collaboration and identity exploration, privacy and security are concerns when using them for teaching and learning due to risks of oversharing personal information and lack of control over third-party content like advertisements. However, when regulated properly, SNS show potential for outreach, promoting events, and facilitating discussions among interest groups in academic settings.
We tested the user experience of the leap motion controller with users. It shows the great potential of gesture controls, but also some significant drawbacks. Interaction designers need to be aware of technical limitations and human expectations when deisgning apps with gesture interfaces.
AND Isitallaboutwhoyouknow - future directions reportpesec
This document summarizes a discussion session on developing careers for young people in the creative industries in London. Key points from the discussion included: there is a perception the arts sector is predominantly middle-class; passion and commitment are important but some young people lack exposure; unpaid internships are common but standards need improving; and higher education is often a default rather than assessing skills. Participants agreed on developing early arts exposure, relevant opportunities, entrepreneurship, transparent recruitment, and sharing best practices.
Aucfan Presentation @Redherring Asia 2014 PresentationYuma Ichiba
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Technical Bulletin 0714 Elastomeric insulation versus polyisocyanurate in low temperature applications
1. Page 1 of 8
TECHNICAL BULLETIN 0714
Elastomeric Insulation versus
Polyisocyanurate in
Low Temperature Applications
PURPOSE
Several of Dyplast’s prior Technical Bulletins have provided in-depth comparisons of various insulants, including polyisocyanurate (polyiso or PIR), polyurethane (PUR), phenolic, polystyrene (expanded EPS and extruded XPS), cellular glass, and fiberglass - - as well as less-than-comprehensive comparisons with elastomeric and aerogel. Now with somewhat more information becoming available from elastomeric manufacturers and the aggressive marketing from elastomeric suppliers for colder applications it is appropriate to dedicate a Technical Bulletin to elastomeric insulants as compared to polyisocyanurate - - and to a much lesser extent phenolic, and cellular glass.
QUICK PERSPECTIVES
The most basic perspective is that the overall cost of elastomeric insulation is materially higher than polyisocyanurate, and polyiso also has significantly better thermal insulation properties - - thus raising the question of “why use elastomeric”:
25/50
The most immediate unambiguous answer is that elastomeric insulation meets a Flame/Smoke index of ≤ 25/501, and polyisocyanurate as yet does not2. When 25/50 is required, elastomeric does not compete against polyiso, but rather competes with phenolic, cell glass, and even polyethylene insulation on small diameter pipe. We will address competitiveness of elastomeric versus these insulants in this environment in a subsequent bulletin. When 25/50 is not required, polyisocyanurate would at first glance appear to be the obvious choice due to cost and long term thermal performance; but we’ll examine this further in subsequent paragraphs.
Thermal Resistance “R”/Conductivity “K”
In reference to thermal resistance, polyiso’s R-value3 is 6.7 (k-factor = 0.17) measured at 75°F, approaching twice the insulating value of elastomeric with “R” at nominally 3.74. Virtually all insulants have improved thermal
1 Spread Index (FSI) ≤ 25 and Smoke Developed Indexes (SDIs) ≤ 50 (in other words meets a 25/50 rating per ASTM E84). A 25/50 rating is required when local codes invoke the International Mechanical Code or its equivalent for indoor air plenum requirements.
2 Dyplast’s ISO-C1 is currently at 25/160, and progress is being made.
3 R-value = thermal resistance (hr.ft2.F/BTU); k-factor = thermal conductivity (BTU.in/hr.ft2.F), the inverse of R-value.
2. Page 2 of 8
Bulletin 0714 July 31, 2014
Figure 2: Elastomeric tube with adhesive on seam
Figure 1: Elastomeric sheet
performance at lower temperatures; for instance at -265°F Dyplast’s ISO-C1® has a k-factor of 0.11 (R-value of 9.1). The thermal conductivity for elastomeric insulation at -265°F could not be found in available information, yet some sample temperatures are listed in Table 1. Properties of both insulants are such that the k-factor of polyiso will always be better than elastomeric within each insulant’s temperature range. Thus an equivalent thickness of polyisocyanurate would offer more energy savings per inch. Alternatively, a higher R-value (lower k- factor) would allow a lower thickness of insulation, which would further lower capital cost.
Water Vapor Transmission
The other somewhat more ambiguous advertised advantage of elastomeric insulant is its Water Vapor Transmission which is indeed superior at nominally <0.1 perm-inch (with some product brands lower), while polyiso’s WVT is 2.0. Yet polyisocyanurate is installed with a vapor barrier in refrigeration and LNG applications, consequently bringing the total insulation system to a water vapor permeance comparable to that of elastomeric; and while some elastomeric insulant suppliers indicate their product can be installed without a vapor barrier on small pipe in mild environmental conditions, the majority of suppliers and conventional wisdom note that “additional vapor barrier protection may be necessary when installed on low temperature surfaces or where exposed to high humidity conditions”. So in cold applications, and in particular refrigeration and LNG, both polyiso and elastomeric require vapor barriers to ensure integrity against moisture.
Pipe Jacketing
Since both elastomeric and polyiso insulants are cosmetically affected ultraviolet radiation, and of course potentially susceptible to severe weather (hail, hurricane, tornado) and mechanical abuse by employees and contractors, pipe jacketing in refrigeration and LNG applications is a requisite in almost all circumstances.
Installation: Elastomeric
Another perspective is that the ease of installation advertised by some elastomeric suppliers refers primarily to the “tubes”, with or without slits, made generally for small diameter pipe and often used by plumbers on hot and cold water applications.
4 Each R-value (i.e. k-factor) is measured per ASTM C177.
3. Page 3 of 8
Bulletin 0714 July 31, 2014
Application of elastomeric on larger pipe and/or lower temperatures requires the larger and more expensive tubes with slits,
or alternatively careful measurement of the sheets to wrap around straight pipe and elbows carefully crafted by skilled labor, and carefully seal all joints and seams5.
Given elastomeric’s relatively poor k-factors, multiple layers are inevitably required for lower temperature refrigerant applications and for LNG in particular. For instance, for an LNG application at 80°F ambient and 80% humidity conditions (conditions easily possible in eastern and southern coastal regions) an elastomeric insulation system must be 6 inches thick requiring three layers of two-inch elastomeric insulant, as opposed to an option of 3.5 inches of polyiso. In fact, generally any application operating at less than -20°F would require more multiple layers of elastomeric, while a single layer of polyiso is possible.
Referencing the installation guide for LNG from one manufacturer6 , the opening paragraph of that document offers insight into the process. We have paraphrased and added detail from later in their document:
1. LNG insulations are all multilayered
2. Cut each sheet to size by measuring the circumference of the prior layer
3. The first layer is never glued, and rather held together by applying aluminum tape circumferentially every 12 inches. Longitudinal seams are also sealed with aluminum tape
4. The joints of the first layer always have an expansion joint, filled with fiber insulation
5. The first layer is always covered with an aluminum/polyester vapor barrier
6. The first layer does not adhere perfectly to the pipe: an excess of 2-5% is necessary to allow for thermal contraction of the insulation during use
7. The subsequent layers are installed in the same way as those for traditional applications for cold (i.e. glue and anti-condensation tape on all joints and staggering of the joints between the various layers).
5 Elastomeric installation examples on YouTube are many, but include https://www.youtube.com/watch?v=dWkWtKYKOfA and https://www.youtube.com/watch?v=imGhBXMs6ik.
6 L'ISOLANTE K-FLEX: http://www.kflexusa.com/downloads/Installation%20Guides/K- FLEX%20LNG%20Applications%20Installation%20Manual.pdf
Figure 4: Link to video on making an elbow
Figure 3: Hand cut/glued elastomeric elbow
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Given the information available the complexity and risk issues may be concluded as:
1. The labor and material involved in multi-layer applications can be assumed to be generally triple the amount for a single layer application;
2. The skill-sets required for field installation and the related costs, particularly in a labor union environment include:
a. Field calculations for lengths of elastomeric sheets to cover extra layers;
b. Experience in cutting and fabricating elbows and fittings, particularly in multi-layer applications - - with of course offset joints and seams;
3. Risk assessment for applications at less than -70°F where elastomeric becomes brittle
a. Thermal shock?
4. Performance of specified adhesives and tape at cryogenic temperatures;
5. Elastomeric insulant behavior over multiple thermal cycles.
Installation: Polyisocyanurate
We caution the installation of any insulation system that will operate at cryogenic temperatures is not “easy”, since skilled labor is involve and attention to detail critical to the long-term success of the insulation system. Yet we offer that the installation of a polyisocyanurate insulation system is as easy or easier than other insulant systems. A polyiso insulation system over pipe primarily consists of insulant half-shells (generally three feet long yet can be made in custom lengths) that are placed over the pipe and secured with fiber tape, then wrapped with a vapor barrier secured with vapor barrier tape. The vapor barrier can be factory applied with self-seal overlapping tape if desired.
Elbows and fittings can be fabricated to precise shapes and measurement for simple field application. Expansion/contraction joints are added as necessary to accommodate expansion/contraction in long linear runs of pipe. Even though polyiso is rigid, with excellent compressive strength to withstand abuse, a metal protective jacket is almost always applied.
Figure 5: Polyiso "clamshell" with factory-installed vapor barrier
Figure 6: Polyiso valve cover
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Note that when polyiso is installed in lower temperature systems, including LNG, multi-layer systems are normally specified by the engineer even though a single layer of polyiso could readily accommodate the thermal resistance requirements. The reason is simply to enable the off-setting of seams and joints, thus providing an extra layer of protection against moisture penetration in the unlikely event of the breach of the vapor barrier/jacket. In single-layer systems, polyiso half-shells (or quarter-shells7 on very large pipe) can have ship-lapped seams and joints to provide additional moisture protection. Polyiso has decades of successful performance in very low temperature applications, including LNG temperatures and below. For the sake of brevity in this document, view the following Case Study on Elba Island LNG and Dyplast’s Installation Guidelines.
PHYSICAL PROPERTIES
Physical Property
Polyisocyanurate Insulation
Elastomeric
Insulation
Units
ASTM Standard
k-factor @ 75°F
0.17
0.2498 to 0.2709
Btu-in/hr-°F-ft2
C177
k-factor @ -20°F
0.18
0.220
Btu-in/hr-°F-ft2
C177
k-factor @ 150°F
0.20
0.284
Btu-in/hr-°F-ft2
C177
R-value @ 75°F
5.88
3.77
hr-°F-ft2/Btu
C177
R-value @ -20°F
5.56
4.28
hr-°F-ft2/Btu
C177
R-value @ 150°F
5.0
3.31
hr-°F-ft2/Btu
C177
Water Absorption
0.6%
0.2%
% by volume
C209
Water Vapor Transmission
2.0
≤ 0.00610 to 0.0311
perm-in
E96
7 While half-shells can be fabricated, quarter-shells are sometimes more economical due to the number of shells that can be fabricated from a single “chunk” of polyiso insulation.
8 NETZSCH Instruments North America, LLC Report # 621002395 on K-Flex.
9 KFDS-0001-0511_K-Flex ECO Tech Data Sheet_screen.pdf re: green K-FLEX ECO™.
10 R&D Services Report: RD13202-R1 on K-Flex.
11 Varies by elastomeric product brand.
Figure 7: LNG Piping (ISO-C1)
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FSI/SDI
25/160
20/2512 to 2 inch
E84
25/5013 to 3/8 inch
Closed Cell
Yes
Yes
Maximum Thickness
> 6
≤ 214
inches
High temp
+300°F15
300°F16 (200°F for some products)
Low temp
-297°F per ASTM C591 (and applications considerably below17)
-297°F (only -70°F with Seam-Seal)
Fiber, PVC, and CFC – free
Yes
Yes
Flexible
No (with caveat18)
Yes19
Color
Natural
Black, Green, or White20
Table 1: Physical Properties
12 25/50 per ASTM E84 per Southwest Research Institute Report 01.15209.01.124[1]; 2 inch black K-Flex panels glued to 0.25 inch cement board.
13 Note some elastomeric insulation products are 25/50 only to 3/8 inch thickness.
14 Aeroflex advertises certain products up to 4 inches thick, yet not 25/50.
15 Dyplast’s ISO-HTTM (2.5 lb/ft3 density) is suitable for 350°F down to -297°F.
16 Varies by product, yet this is the highest temperature expressed in publicly available datasheets.
17 Dyplast has successful installations on liquid helium systems.
18 ISO-C1 sheets are quite flexible, and can be wrapped around large tanks.
19 Elastomeric insulation may lose flexibility at low temperatures (e.g. <25°F).
20 WVT and other physical properties can vary with the color with the color of the product, even within the same product line.
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BACKGROUND ON POLYISOCYANURATE
Polyisocyanurate is a form of polyurethane, produced as a result of a chemical reaction between polyol and isocyanate. Polyiso has a higher percentage of isocyanate to improve k-factor, dimensional stability, and flame/smoke properties.
Polyiso bunstock for mechanical insulation is produced by pouring the liquid onto a moving belt. As the liquid travels through the “tunnel” it undergoes a chemical reaction and rises into a “bun” constrained on three sides but not on top. The foam is cured and subsequently cut into sheets or blocks that can be fabricated into virtually any shape and size for small to very large pipe insulation. Dyplast’s ISO-C1 has higher thermal efficiency than competing polyiso, EPS, XPS, fiberglass, or cellular glass insulation, and its standard temperature range is from -297°F to +300°F. Polyiso densities typically range from 2.0 to 6.0 lb/ft3, with 2.0 to 2.5 lb/ft3 used for low temperature pipe and equipment, and 6.0 lb/ft3 used for pipe hangars.
BACKGROUND ON ELASTOMERIC
Elastomeric insulation is a “rubber” compound that is flexible and can be supplied as a tube with or without a slit that can be applied through or around a small diameter pipe. Elastomeric insulation can also be supplied in flexible sheets that can be wrapped around larger diameter pipe or applied to a thin (e.g. ¼ inch) inflexible cement board substrate. The three main components used in the manufacturing of elastomeric closed cell foam insulation include the following:
Synthetic rubber blend, typically nitrile butadiene rubber (NBR) and/or
ethylene-propylene-diene monomer (EPDM)
Polyvinyl chloride (PVC), and
A chemical foaming agent
These components are combined in a large mixer, typically in batches of 500 pounds or more. The mixture is then put through extruding equipment to form a particular profile or shape, typically either a round tube or a flat sheet. The profile is heated in an oven to a specific temperature, a process that causes the chemical foaming agent to change from a solid to a gas. When this occurs, thousands of tiny air pockets (cells) form. The profile is cooled while striving to ensure the cells remain unbroken and intact, thus maintaining the material’s closed cell structure. It is then cut to size and packaged for shipment. Elastomeric foams can have a density ranging from 3 to 6 lb/ft3, and are typically green, black, gray, or can be white in color.
Figure 8: Polyiso exiting the tunnel
Figure 9: Elastomeric sheet
Figure 10: Elastomeric "tee"
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There are numerous manufacturers of elastomeric insulation, with many branded products beneath each manufacturer, with physical properties varying considerable between products. End-users, engineers, and contractors are cautioned to be sure of the physical properties of the insulant to be purchased.
SUMMARY
The most scientific approach to insulation product decision-making is to look at the hard facts of physical properties as measured by independent laboratories.
Considering elastomeric’s relatively poor thermal conductivity (k-factor) of approximately 0.25 to 0.27 Btu-in/hr- ft2-°F (R-value of 4 to 3.7 respectively, and comparable to expanded polystyrene or cellular glass) elastomeric compares rather poorly with polyisocyanurate k-factor of nominally 0.17 at 75°F - - almost double the insulating ability.
Considering elastomeric’s poorer thermal resistance properties, “moisture resistance” remains elastomeric foam suppliers’ strongest selling point when compared to other insulating materials. Yet when considering the fact that virtually all very low temperature pipe insulation is installed with vapor barriers and jackets, the advantages of elastomeric diminish.
The disadvantages, on the other hand, include product cost, labor costs, and potential risks as mentioned above.
Polyiso, alternatively, has been used successfully for decades in refrigeration and cryogenic environments, and the cost of the insulant, the installation, and risks are lower - - while the thermal performance over the long term is superior.