A total of three rectangular fabric expansion joints and six round fabric expansion joints were custom designed for an offshore oil extraction and natural gas project. The rectangular joints are 56″ x 81″ I.D. x 25″ O.A.L. and the round joints are 105″ dia. x 24″ O.A.L. 309 stainless steel was used for the duct, 310 for the liners, 316 for the covers, 321 for the studs, 309 for the flanges. The fabric belt was a three layer belt with an inner layer of glass cloth, a layer of KO wool and an outside layer of reinforced PTFE. The expansion joints were designed for 1 psig at a temperature of 1100°F. The rectangular joints were designed for 2″ axial compression, a 1″ extension, and a 1″ lateral offset. The round joints were designed for 4″ axial compression, a 1″ extension, and a 0.5″ lateral offset. All welds were dye penetrant examined.
Fabric Expansion Joints > Blog Articles
The two assemblies shown, a mitered elbow duct work and fabric expansion joint and duct work assembly, are designed for a sulfuric acid plant. Both assemblies are fabricated from 1/4" thick 304L stainless steel. They are designed for a 15" water column with a temperature of 180°F, axial compression of 3/4", and lateral movement of 3/4". A dye penetrant examination is performed on all welds prior to shipment.
Are there fabric expansion joints in your future? Are you looking to design or purchase a fabric expansion joint or just curious about the assortment of available frames? View different types of metal attachment styles for fabric expansion joint designs.
Metal Attachment Frames with Baffles and Insulation Pillows
We recently added new diagrams to the U.S. Bellows website. Check out all of the different components that make up a custom fabric expansion joint versus a standard expansion joint.
Diagram of High Temperature, 3-Layer Expansion Joint
Diagram of Standard Fabric Expansion Joint
This rectangular fabric expansion joint is designed for high air circulation flow for an air cooling loop duct in a power plant. It measures 81″ L x 18″ W x 16″ face-to-face, and is fabricated with stainless steel angle, frame ends and internal liner. The fabric belt material is reinforced silicone fabric cloth, which can withstand temperatures up to 550°F. This expansion joint is rated for axial movement of +/- 1″ with a 1/2″ lateral offset. A dye penetrant test on all welds was conducted prior to a quality assurance inspection prior to shipment.
This rectangular fabric expansion joint will be used in an exhaust duct in a power plant. It measures 136″ L x 54″ W x 12″ face-to-face and is fabricated with stainless steel angle, frame ends and internal liner. The fabric belt material is PTFE coated glass cloth, which is low friction and high in tear/crease resistance and tensile strength. This expansion joint is rated for an axial movement of 1-1/2″ with a lateral offset of 1/2″ and maximum temperatures up to 600°F. A quality inspection was administered, including a dye penetrant test prior to shipment.
Openings between the floor of the furnace and the pipe penetration openings can cause heat energy loss in certain types of furnace applications. A penetration bag type seal is now available to prevent energy loss through the pipe penetrations during the expansion and contraction movement of the pipe through the furnace floor. The use of a furnace seal bag permits movements of the pipe through the furnace floor while providing an airtight closure to prevent heat loss.
A furnace seal bag works similar to a fabric expansion joint. The bag consists of multiple layers of flexible flame and heat resistant, impervious fabric designed to operate from start up to high temperature design conditions. The bag contracts and expands with varying furnace temperatures. The seal bag allows thermal expansion and prevents the loss of heat through the furnace floor which conserves energy and reduces the cost of energy. Vew Full Article
To get your copy, fill out the request form. A number of improvements have been implemented based on valuable feedback from our customers and engineers.
- all new photographs
- a brand new section on past projects
- more expansion joint data tables
You can now download the expansion joint data tables from our online catalog.
Reasons to choose a fabric expansion joint:
- Good for high temperature applications
- High movement capabilities
- No size restraints
- Less expensive to design and fabricate
- See more reasons in our catalog
Reasons to choose a metal expansion joint
- Maintenance Free
- Withstand large range of temperatures
- Can be used for high pressure services
- See more reasons in our catalog
This neoprene fabric expansion joint is 42″ I.D. by 7-3/4″ face-to-face and is designed for a generator cooling fan in a power plant. The angle frame ends are fabricated from carbon steel, and the neoprene fabric belt is fastened to the angle flanges by two stainless steel clamps. The expansion joint absorbs vibration between the air supply duct and the cooling fan. A dye penetrant exam was performed on the welds of the angle iron flanges prior to shipping to the customer ahead of schedule.