U.S. Bellows Fabric Expansion Joints

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U.S. Bellows, Inc.
Worldwide Leader in Metallic and Fabric Expansion Joints
▫ Fast Turnaround ▫ Repair ▫ Replace ▫ Refurbi...

www.usbellows.com
Certifications & Manufacturing Facility
U.S. Bellows, Inc. – Expansion Joints
Piping Technology & Produc...

www.usbellows.com
U.S. Bellows Team
• Combined experience of 600+ years
– 35 Manufacturing (500+ years)
– 8 Engineering (1...

• Pioneer in expansion joints, in business since the 1960’s
• Joined the PT&P Family in 1995
– 5x the resources: PT&P, SWE...

• EJMA Member
– Approx. 15 years now!
– Representation on:
• Technical Committee
• Management committee
EJMA Technical Com...

• ASME U-Stamp, R-Stamp and NS Certified
• Minority Business Enterprise
• Houston Minority Business Council
• ISO 9001:201...

This presentation will cover the following topics
• Fabric Expansion Joint Basics
• Applications
• Fabric Belt Materials
•...

• Fabric expansion joints compensate
for duct misalignment and duct
thermal growth
• Fabric expansion joints can absorb
la...

Fabric Belt Material Introduction
The fabric belt deforms to allow thermally induced
movements. The belt must be able to w...

TYPE OF PLANTS
– Fossil Fired Power
Plants
– Pulp and Paper
Plants
– Cement Plants
– Refineries
– Chemical Plants
Where ar...

• Fossil Fired Power Plant
– Boiler
– Economizer
– Air Heater
– FD Fan
– Precipitator
– ID Fan
– Scrubber
– Stack
A fossil...

Economizer to
Air Heater
Expansion Joint
Economizer
Air Heater
Application Example
Economizer to
Air Heater
Expansion Join...

Application Example
High Temperature Dirty Flue Gas
13

HOW TO FILL OUT THE DATA SHEET
– Contact Information
Fabric EJ Data Sheet
14

A: FABRIC BELT
B: ACCUMULATION BARRIER
C: FRAME
D: RADIUS CORNER
E: LINER
F: FASTENER
G: BACKUP BAR
Data Sheet Input = Des...

• Part Terminology
– Belt Attachment Frame
– Gasket and/or
Insulation Tape
– Insulation Pillow
– Accumulation Barrier
– Fa...

Bolt In vs. Weld In Designs
• Framed EJs that weld in are less expensive to manufacture than framed bolt in
designs.
• Wel...

Metal Attachment Frames – No Baffles
18

Metal Attachment Frames – With Baffles
19

Metal Attachment Frames – With Baffles, Pillows, & Seals
20

Fabric Expansion Joint Basics
Factors influencing expansion joint design
• Belt material
• Frame material
• Frame design
•...

Factors influencing expansion joint design
– Temperature
– Wet Corrosive Media
– Movements
– Abrasive Media / Particulate ...

Particulate Deflector
Expansion Joint Components
Additional components are available to augment certain
fabric expansion j...

Fabric Belt Materials
Fabric belt material selection is a critical factor
in the successful design of each fabric expansio...

Fabric Belt Variables
Fabric belt material variables include:
– Fiberglass Tensile Strength
– Chemical barrier thickness
–...

Materials Comparison Chart
Temperature Materials Advantages Pressure Chemical
Resistance
Applications
Low
Ambient - 250°F
...

Fabric Belt Materials Fluoroplastics – PTFE
PTFE Coated Glass Cloth
Features
• Excellent Chemical Resistance
Physical Prop...

Fabric Types
Reinforced Silicone Fabric
Features
• Excellent Gasketing Material
• Extremes High & Low Temperature Resistan...

Fabric Types
Aluminized Glass Cloth
Features
• Resists most acids & alkalis
• 20% Liquid Aluminum Compound
• K Factor of ....

Fabric Types
Silica Oxide Glass Cloth
Features
• Non-Flammable
• Maintains High Tensile Strength at
Elevated Temperatures....

Fabric Types
PFA Fluoropolymer Film
Features
• Outstanding flex life and stress crack resistance
• Performance from -254°C...

Fabric Types
Insulation
Physical Properties
• Density: 4, 6, 8 pf
• Thickness: fi-2 (12.5-50) in.
• Melting Point: 3200°F
...

Fabric Expansion Joint Adhesives
Loctite 404
• Transparent / Colorless
• Low Viscosity
VersaChem Red Silicone 650
• High T...

Fabric Types
Braided Material
• Available in 304, 321, & 316L Stainless Steel
• Temp. from cryogenic to 1500°F
34

Fabric Belt Materials - Elastomers
Elastomer belt materials are built up
into a multi-layered sheet reinforced
with fiberg...

Single Ply vs. Two Ply Elastomers – Rubber / Viton
Reinforcement
Reinforcement
Elastomer
Elastomer
Typical 1/8″ thick
belt...

Manufacturing Capabilities
• Materials:
– Single layer PTFE: temperatures
up to 600°F
– 3-layer Belt and Insulation Pillow...

Fabric Expansion Joints
38
Viton Boots

39
Fabric Expansion Joints
Viton Boots

Fabric Expansion Joints
40
Viton Boots

41
Fabric Expansion Joints
Viton Boots

Fabric Expansion Joints
42
Viton Boots

43
Fabric Expansion Joints
Viton Boots

A Variety of Fabric Expansion Joints
44

A Variety of Fabric Expansion Joints
45

Fabric EJ Installation
• Pre-Installation Check
– Confirm dimension data per U.S. Bellows
drawing
– Confirm duct/duct flan...

Fabric EJ Installation
• Use the U.S. Bellows drawing as
a guide for dimensional info
• Clean duct/flange surfaces and
pre...

Fabric EJ Installation
• If ducting is in place & cannot
be moved for the installation
– Lift expansion joint into place
u...

US Bellows Experience
• General Electric
• Exxon Mobile Houston
• Tulsa Heaters
• KBR
• Augering Technology
• Bechtel
• AL...

Neoprene/Rubber
Features
• Sizes: 1.5” to 144” Diameter
• 1 to 4 Arches as Required
• Choice of Cover and Liner Materials
...

Neoprene/Rubber
Neoprene Expansion Joints for a Gas Turbine Application
EPDM Expansion Joints Designed
for a Generator Fan...

High Temp. Furnace Bags
• Bag consists of multiple layers of flexible, flame
and heat resistant, impervious fabric
• Desig...

High Temp. Furnace Bags
• Stainless steel
clamps or band
straps connect one
end of the pipe that
goes through the
penetrat...

High Temp. Furnace Bags
• Look for rips or tears in the
fabric and openings at the
seal
• Observe any damage or
corrosion ...

U.S. Bellows provides custom designed expansion joints in duct work and
fabricated duct work assemblies. The assemblies ma...

Fabric Expansion Joint & Duct Work Assembly
78" Fabric Expansion Joint
and Duct Work Assembly
with a 90° Elbow
• Designed ...

Fabric Expansion Joint & Duct Work Assembly
60" Ductwork with
Fabric Expansion Joint
for a Sulfuric Acid Plant
Completed w...

Manufacturing Capabilities
Fabric Expansion Joints
• New Customer Standard:
– Liner and flange used to be 2 pieces
– We co...

24/7 Quick Turn Service
• Emergency?
– On-call team… available 24/7
– Online emergency form with a guaranteed
response tim...

Technical Information
Featured Projects
Pictures and Project Details
Webinar Registration
Details on Upcoming Webinars
Qui...

• U.S. Bellows is a diverse manufacturer of a wide
variety of high-quality, competitively priced
expansion joints.
• U.S. ...

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