Duct Work — The Expansion Joints Blog

Archive

Archive for the ‘Duct Work’ Category

Duct Work and Expansion Joint Assembly Custom Designed by U.S. Bellows for an Oil Refinery in California

August 11th, 2013 Comments off

Duct Work and Expansion Joint Assembly Custom Designed by U.S. Bellows for an Oil Refinery in California

This duct work and expansion joint assembly was custom designed by U.S. Bellows for an oil refinery in California. The project consists of 36″ x 48″ 304 stainless steel oval shaped duct work with a thick wall expansion joint and 30″ x 16″ carbon steel round shaped duct work. It is designed for 900°F at 13.2 psig, and the entire assembly was dye penetrant examined and 100% x-rayed prior to shipment.

62″ Fabric, 42″ Hinged and 42″ Tied Universal Expansion Joints and Duct Work Designed for an Acid Plant

July 13th, 2013 Comments off

62" Fabric, 42" Hinged and 42" Tied Universal Expansion Joints and Duct Work Designed for an Acid Plant

62" Fabric, 42" Hinged and 42" Tied Universal Expansion Joints and Duct Work Designed for an Acid Plant

U.S. Bellows custom designed two 42″ tied universal expansion joints, a 42″ hinged expansion joint and a 62″ fabric expansion joint in ductwork for an acid plant in Louisiana. The assemblies had flanged and flued head bellows fabricated from 304H stainless steel. The rest of the assemblies were made from carbon steel with operating temperatures of 700°F at 10 psig. The expansion joints were dye penetrant and x-ray tested prior to shipment.

102″ Dia. Single Hinged Expansion Joint and Duct Work Assembly and Two 92″ Single Expansion Joints

February 4th, 2013 Comments off

102" Dia. Single Hinged Expansion Joint and Duct Work Assembly

Two 92" Single Expansion Joints

U.S. Bellows designed a 102″ dia. single hinged expansion joint and duct work assembly, along with two 92″ single expansion joints for a coal gasification facility in Mississippi. Both the assembly and expansion joints were fabricated from carbon steel with 304 stainless steel bellows, and designed for 3.6° angular movement at 825°F and 3 psig. The expansion joints were dye penetrant examined, 100% x-rayed and soap and air tested prior to shipment.

Engineering, Design and Fabrication of 119″ Expansion Joints, Duct Work and Supports

June 25th, 2012 Comments off

Engineering, Design and Fabrication of 119" Expansion Joints, Duct Work and Supports

U.S. Bellows provided the total engineering, design and fabrication package for this project that included: expansion joints, elbows, duct work, saddle supports, F-type variable spring supports, slide plates and pipe anchors.

Engineering, Design and Fabrication of 119" Expansion Joints, Duct Work and Supports

A total of twelve, 119″ dia. double slotted hinged expansion joints, thirty-six, 72″ dia. elbows and twelve, 119″ dia., 55′ long header ducts were fabricated for a power plant in Mississippi. The expansion joint assemblies were designed for .5° angular movement, 3/8″ lateral, 1-1/2″ axial compression. The design conditions were 5 psig at 300°F. The duct work was fabricated from A-36 carbon steel material and the bellows were fabricated from 304 stainless steel. A dye penetrant exam, soap and air test and spot x-ray on all duct seam welds was performed prior to shipping.

View our past expansion joint and duct work projects in the Featured Product Archives

May 14th, 2012 Comments off

Check out some of our past projects in the Featured Product Archives section of our website.

  • View images of metallic and fabric expansion joints, duct work, and combination assemblies.
  • Also read the details on the project itself, including design specifications and testing requirements.
  • The projects are conveniently grouped by the type of expansion joint and then listed descending by the release date.

Here are a few examples:

36″ Tied Universal Expansion Joint for a Petrochemical Plant in Kuwait
36" Tied Universal Expansion Joint
U.S. Bellows Inc. designed and fabricated a 36″ tied universal expansion joint for a petrochemical plant in Kuwait. The expansion joint measures 36″ in diameter x 318″ from center of elbow to face of flange. It is fabricated from 316H stainless steel with Inconel® 800 bellows. The design pressure of the expansion joint is 65 PSIG, and the design temperature is 1076°F. It is designed for axial compression within the tie rods and lateral movement of 3.02″. Hydro-testing was performed at 98 PSIG to assure the integrity of the tie rods and also to assure quality. The pictures show the expansion joint leaving the shop on its way to the customer. The stainless steel flange faces are protected with 3/4″ plywood during delivery.
44″ Double Gimbal Universal Expansion Joint for an Oil Refinery in Wyoming
44" Double Gimbal Universal Expansion Joint
This gimbal expansion joint is designed for angular rotation in two planes of up to 4° in each plane. It has an overall length of 140″ with a total assembly weight of 11,000 lb. It is fabricated with 316 stainless steel bellows and carbon steel piping. This expansion joint was 100% dye-penetrant examined and hydro-tested prior to shipment. U.S. Bellows, Inc. and Piping Technology & Products, Inc. also furnished the spring supports and pipe attachments for this project.
128″ x 229″ Rectangular Fabric Expansion Joints for an Exhaust Duct
128" x 229" Rectangular Fabric Expansion Joints
The fabric expansion joints shown above are fabricated with a three layer fabric belt. The three layers consist of an inner layer of silica cloth, a middle layer of mineral wool and an outer layer of PTFE/coated fiber glass. The frame includes an insulation blanket of mineral wool and stainless steel wire mesh. The frame and liner are fabricated from 3/8″ thick 304 stainless steel and each expansion joint’s frame and liner welds were dye-penetrant tested before shipping. 

Design:
- Pressure: 1 PSIG
- Temperature: 1010°F

Design Movements:
- 2″ Axial Displacement
- 3/4″ Lateral Displacement

84″ Diameter Duct Work and Fabric Expansion Joint Assemblies

February 6th, 2012 Comments off

84" Diameter Duct Work and Fabric Expansion Joint Assemblies

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.

84" Diameter Duct Work and Fabric Expansion Joint Assemblies

Check out some of our recent experience with duct work and expansion joint projects

June 1st, 2011 Comments off

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.

View recent duct work and expansion joints:

 

Duct Work Photo Gallery

Categories: Duct Work Tags:

Duct Work for Absorbing Tower Piping in an Acid Plant

May 9th, 2011 Comments off

Duct Work for Absorbing Tower Piping in an Acid Plant

This duct work was fabricated with mitered elbows from SA-516 grade 70 carbon steel, and was designed for absorbing tower piping in an acid plant. It has a 72″ outside diameter and measures 23′-2/4″ from the centerline, elbow to elbow. This assembly was only a single portion of a duct work system that included 36″, 48″ and 60″ diameter sections of fabricated duct work. The duct work was fabricated with roundness tolerance of +/- 1/8″. A 100% dye penetrant test, soap and air test, and spot x-ray testing of all pipe circumferential and long seam welds was performed prior to shipment.

Duct Work for Absorbing Tower Piping in an Acid Plant

Categories: Duct Work Tags:

78 Inch Fabric Expansion Joint and Duct Work Assembly with a 90° Elbow for a Sulphuric Acid Plant

April 11th, 2011 Comments off

78" Fabric Expansion Joint and Duct Work Assembly with 90° Elbow for a Sulphuric Acid Plant

U.S. Bellows designed and fabricated a 78″ fabric expansion joint and duct work assembly with a 90° elbow for a sulphuric acid plant in Louisiana. A stress anaylsis was performed to determine thermal movements and spring supports, loads and travel.

78" Fabric Expansion Joint and Duct Work Assembly with 90° Elbow for a Sulphuric Acid Plant

The ducts are fabricated from carbon steel and are 30′ long. The expansion joint is designed for 750°F at 5 PSIG with 2.5″ lateral deflection (cold preset) and 2″ axial compression. Cradle supports and a “big ton” spring support were also fabricated for this project.

border

Contact Us: +1 (281) 241-9418 Toll Free: (855) 591-0906 Fax: +1 (713) 731-8640 sales@usbellows.com
Our Parent Company: Piping Technology Pipe Supports, Pipe Clamps, Pipe Hardware & Insulated Pipe Shoes
Fellow Subsidiaries: Sweco Fab: ASME Vessels, Pig Launchers, Duct Work, Strainers & Spectacle Blinds
 Pipe Shields: Pre-Insulated Pipe Supports, Slides, Guides & Anchors

Fronek Anchor/Darling
: Snubbers, Sway Struts & Sway Braces


Copyright © 2017  U.S. Bellows, Inc. All Rights Reserved. Privacy Policy