The Certified Welding Inspector (CWI) plays an important role during any welded construction activities ensuring the required specifications and standards are followed. Due to the numerous materials and processes associated with metal joining (welding) THIS PRESENTATION SHALL SHOW ONLY THE BASIC WELDING PROCESSES AND EXAMINATION METHODS (NDE). National and International Codes and Specifications along with measuring devices are the Inspector’s tools. Hopefully the following presentation shall give an insight into basic welding inspection.
Welding Defects
Eurotech Now inteducing Welding Defects. Welding Defect is any type of flaw in the object which requires welding. Seven type of Welding Defect
Seven type of Common weld defects include:
1. Lack of fusion
2. Lack of penetration or excess penetration
3. Porosity
4. Inclusions
5. Cracking
6. Undercut
7. Lamellar tearing
Any of these defects are potentially disastrous as they can all give rise to high stress intensities which may result in sudden unexpected failure below the design load or in the case of cyclic loading, failure after fewer load cycles than predicted.
This ppt covers MIG welding process using 100% CO2 gas .Here the development,equipments used,mechanism,troubleshooting and safety for MIG welding is shown
The Certified Welding Inspector (CWI) plays an important role during any welded construction activities ensuring the required specifications and standards are followed. Due to the numerous materials and processes associated with metal joining (welding) THIS PRESENTATION SHALL SHOW ONLY THE BASIC WELDING PROCESSES AND EXAMINATION METHODS (NDE). National and International Codes and Specifications along with measuring devices are the Inspector’s tools. Hopefully the following presentation shall give an insight into basic welding inspection.
Welding Defects
Eurotech Now inteducing Welding Defects. Welding Defect is any type of flaw in the object which requires welding. Seven type of Welding Defect
Seven type of Common weld defects include:
1. Lack of fusion
2. Lack of penetration or excess penetration
3. Porosity
4. Inclusions
5. Cracking
6. Undercut
7. Lamellar tearing
Any of these defects are potentially disastrous as they can all give rise to high stress intensities which may result in sudden unexpected failure below the design load or in the case of cyclic loading, failure after fewer load cycles than predicted.
This ppt covers MIG welding process using 100% CO2 gas .Here the development,equipments used,mechanism,troubleshooting and safety for MIG welding is shown
Paes Andrano - Bozza - Piano d’Azione per l’Energia SostenibileComune di Andrano
Bozza del Paes di - Piano d’Azione per l’Energia Sostenibile
C'è tempo fino al 27 luglio per inviare osservazioni o proposte di integrazione a:
Ufficio Tecnico Comunale - tel. 0836/1900997 - fax.0836/926032 - e-mail: a.urso@comune.andrano.le.it
CD collection is one of the most funeral things of a person’s lifestyle. People from the CD business or any individual that has possession of some Cd’s that are beloved and near to them wish to discover excessive defending actions that could secure their useful Cds for the biggest time interval and in the best possible way. For more information visit us @ https://www.thecustomboxes.com/
Chinese culture is very rich in nature in terms of colors and calligraphic patterns. Chinese food boxes portray the same tradition in their style and design
.
There are numerous welding processes including arc welding, electron beam welding,
friction welding, laser welding, and resistance welding. This article will concentrate on arc
welding, which is the most common technique used to join most steels. Factors affecting
weld quality will be discussed and how to avoid common weld defects will be presented.
Arc welding requires striking a low-voltage, high-current arc between an electrode and the
base metal. The intense heat generated with this arc melts the base metal and allows the
joining of two components. The characteristic of the metal that is being welded and the joint
type (i.e. groove, fillet, etc.) dictates the welding parameters and the procedure that needs to
be followed to obtain a sound weld joint.
This Presentation covers the basic concepts of Hot cracks and cold cracks in welding. For more information, please refer the books mentioned in the references slide.... Thank you
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Final project report on grocery store management system..pdf
Weld discountinuitie
1. 1 1
Causes of welding discontinuities
Base metal, joint design
Welder skill, improper supervision
Welding consumables and shielding gases
2. 1 2
As per ISO 6520-1987 Welding discontinuities
are divided in following six groups
Group Designated Defect
1 Cracks
2 Cavities
3 Solid Inclusions
4 Lack of Fusion &
penetration
5 Imperfect Shape
6 Miscellaneous defects
4. 1 4
Weld Discontinuities
1. Crater cracks
2. Face cracks
3. HAZ cracks
4. Longitudinal cracks
5. Root cracks
6. Transverse cracks
7. Under bead cracks
8. Lamination
9.Misalignment
10.Concavity
11.Excess Cap
12-Overlap
13. Slag inclusion
14. Lack of fusion
15. Lack of penetration
16. Porosity
17. Undercut/Under fill
18. Spatter
19. Tungsten inclusion
20. Arc strike
21. Burn through
22.Mechanical Damage
5. CRACKS
• Crack is a tight linear separation of metal that
can be very short to very long indications
• Cracks are grouped as hot or cold cracks.
• Hot cracks usually occur as the metal solidifies
at elevated temperatures.
• Cold cracks occur after the metal has cooled to
ambient temperatures ( delayed cracks).
12. 1 12
Crater Crack
Joint Line Crater
*
Crater crack is generally in the shape of a star in the
center of the terminated weld bead.It is a hot crack
13. 1 13
Causes Remedies
Highly restrained joint Preheat, Stress relief, welding sequence change
Excessive dilution Change welding current & speed, use DC-, buttering
Defective electrodes or
flux
Use new electrodes or flux, check baking cycle
Poor fit up Reduce root opening, build up edges
Small weld bead Increase electrode size, raise welding current,
reduce speed
High S in base metal Use low-S filler
Crater cracking Fill crater before extinguishing arc
Angular distortion Change to balanced welding
Causes & Remedies- Weld Cracking
14. 1 14
Porosity appears often as dark round irregular spots in clusters or
rows. Sometimes it is elongated and may have an appearance of a
tail. This is the result of gas attempting to escape while the metal is
still in a liquid state & is called wormhole porosity. All porosity is
indeed a void will have a darker density than the surrounding.
Cavities
16. 1 16
Cluster porosity is caused when electrodes are contaminated with
moisture or hydrocarbon. It appears like regular porosity in a film
but the indications will be grouped close together.
Cavities
18. 1 18
Causes & Remedies of Porosity
Causes Remedies
Excessive H2,N2,O2 in
welding atmosphere
Use low-H2 electrodes, high deoxider fillers,
increase shielding gas flow
High solidification rate Use preheat or increase heat input
Dirty base metal Clean joint face and adjacent surfaces
Improper arc length.
Welding current or
electrode manipulation
Change welding conditions or techniques
Galvanized steel Use E6010 electrodes and volatilize zinc ahead of
weld pool
Excessive moisture in
electrode
Check baking and storing of electrodes, Preheat
base metal
19. 1 19
Slag Inclusions are the nonmetallic solid materials trapped in
weld or between the weld and base metal. In a radiograph, dark,
jagged asymmetrical shapes within the weld or along the weld joint
areas are indicative of slag inclusions.
Solid Inclusions
20. 1 20
Tungsten inclusions. Tungsten is a brittle and dense material
used as an electrode in tungsten inert gas welding. If an incorrect
welding procedures & skill is performed, then only the tungsten gets
trapped. Radiographically, tungsten is more dense than aluminum
or steel; therefore, it shows as a lighter area with a distinct outline
on the radiograph
Solid Inclusions
21. 1 21
Oxide inclusions are usually visible on the surface of a weld mtal
(especially aluminum). Oxide inclusions are less dense than the surr
-ounding metals and, thus it appears as dark irregular shaped discon
-tinuity in radiograph. This is also referred as puckering in ISO.
Solid Inclusions
22. 1 22
Lack of Fusion and Penetration
Lack of side wall fusion is a condition where the weld metal does
not fuse with the base metal. Appearance on radiograph is usually a
darker line or lines oriented in the direction of the weld seam along
the weld joining area.
23. 1 23
Lack of interrun fusion is a condition where the weld metal does
not fuse with the base metal or the previous weld bead (interpass
cold lap). The arc does not melt the base metal and causes the
molten puddle to flow into the base metal without the proper
bonding.
Lack of Fusion and Penetration
24. 1 24
Imperfect
Undercut is an erosion of the base metal next to the toe of the weld
face. It appears in radiograph as a dark irregular line on outer edge
of the weld.
Imperfect Shape
25. 1 25
Root undercut is an erosion of the base metal next to the root of the
weld. It appears in radiographic images as a dark irregular line offset
from the centerline of the weldment. Undercutting is not as straight
edged as LOP because it does not follow the straight edge
Imperfect Shape
27. 1 27
Root concavity or suck back is a condition where the weld metal
has contracted as it cools down & has been drawn up into the root of
the weld. On a film it appears similar to the lack of root penetration
but the line has irregular wide edges and placed in the middle.
Imperfect Shape
28. 1 28
Excessive reinforcement is an area of a weld added in excess of
that specified by the drawings and codes. The appearance on a
radiograph is a localized & less darker area. A visual examination
will easily determine if the weld reinforcement is in excess.
Imperfect Shape
29. 1 29
Underfilling is an area where the deposited weld metal is less than
the required thickness. It is easy to determine by RT films, because
the image density in the area of inadequacy will be darker than the
surrounding image density.
Imperfect Shape
35. 1 35
Misalignment: The radiographic image is a noticeable difference in
density between the two mismatched pieces. The difference in
density is caused by the difference in material thickness. The dark,
straight line is caused by failure of the weld metal to fuse with the
land area.
Imperfect Shape
37. 1 37
Burn through (icicles) results when too much heat causes weld to
pierce through. Lumps of weld metal sag through the seam creating
a thick globular condition on the root face. On a radiograph, burn
through appears as dark spots surrounded by light globular areas.
Whiskers are the short lengths of electrode wire, visible on
the top or bottom surfaces of the weld or contained within the
weld. On radiograph they appear as light, "wire like" indications.