Data Tables
Features
- Generally made from stainless steel or carbon steel
- May include fabric or metallic expansion joints
- Can be round or rectangular
Technical Information
FAQs
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Duct Work
U.S. Bellows provides custom designed expansion joints in duct work and fabricated duct work assemblies. The assemblies may include fabricated elbows, tees, and straight sections of duct work, in carbon steel or stainless steel, and in diameters of 42″ or larger. The duct sections can include fabric or metallic expansion joints and can be rectangular or round. U.S. Bellows can also provide specialized pipe supports and spring hangers for large diameter duct work. Additionally, we offer complete pipe stress analysis of your duct systems using CAESAR II software.
Duct Expansion Joint – Rectangular & Round – Low Temperature
| Pressure | 3 p.s.i (Max), Positive Pressure only | ||||
| Temperature | 400 ° F (Max) -- 40 ° F (Min) | ||||
| Movements | Flange - to - Flange Dimension | ||||
| 10" | 12" | 14" | 16" | 18" | |
| Axial Compression | ½" | 1" | 1½" | 2½" | 3" |
| Axial Extension | ½" | ½" | ½" | ½" | ½" |
| Lateral Offset | ¼" | ½" | ¾" | 1" | 1" |
Duct Expansion Joint – Rectangular & Round – High Temperature
| Pressure | 3 p.s.i (Max) 27" H 2 O (Vacuum Max) | ||||
| Temperature | 600 ° F (Max), -- 40 ° F (Min) specify | ||||
| Movements | Flange - to - Flange Dimension | ||||
| 10" | 12" | 14" | 16" | 18" | |
| Axial Compression | ½" | ¾" | 1¼" | 1½" | 2" |
| Axial Extension | ½" | ½" | ½" | ½" | ½" |
| Lateral Offset | ¼" | 3/8" | |||
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"Thank you very much for the excellent work you and your associates at PTP/USB provided on my order..."
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High Temperature Insulated Supports - December 2021
"As always, I appreciate the prompt support provided by PT&P team and I know, I can count on it every time."
Expansion Joints Metal Bellows - December 2022
"US Bellows engineer has been really helpful in ensuring that we get this order expedited and that we make sure to iron out all the details to ensure we get the best product."
Expansion Joints Metal Bellows - March 2023
"Your engineers were a tremendous help in getting this order pushed thru for a quick turnaround to support our field needs."
Fabricated pipe shoes, guides, anchors - November 2021
"Good experiences with you all on Expansion Joints in the past."
Expansion Joints Metal Bellows - October 2021
"I sincerely thank all of you for your efforts to date and encourage all of you to continue the excellent performance and commitment to the projects."
Single Expansion Joint - 2020
"We are pleased with the Customer Service and care we have received from our project."
Fabric Expansion Joint - November 2021
"I cannot be happier to deal with the engineers at PTP. The quote process has been extremely easy...
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Expansion Joints - April 2023
"The US Bellows team was very professional and help guide me through the process."
Expansion Joints Metal Bellows - April 2024
"As a Mechanical Engineer, I like the products & complimentary webinars Piping Technology & Products offers."
Expansion Joints Metal Bellows - September 2022
"PT&P provides excellent sales and product support. The company clearly makes an effort to be clear about design selection, order support and product delivery. Keep up the good work."
Pipe Hanger Hardware - December 2021
"PT&P continues to provide excellent products and a world-class customer service experience..."
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Misc. Steel fabrication - February 2022
"Responsive team!"
Expansion Joints Metal Bellows - March 2023
"My impression of your technical and production engagement is very positive."
Expansion Joints Metal Bellows - January 2021
"Thank you for getting the Spring Cans to us quickly. They were actually made a couple of days ahead of projection..."
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Variable Assemblies - August 2022
"Work is always completed when they say that it will be completed."
Expansion Joints Metal Bellows - November 2022