Rectangular Metallic Expansion Joints — The Expansion Joints Blog

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Rectangular Metallic Expansion Joints

January 5th, 2011 Comments off

Rectangular metal expansion joints have a variety of applications in the power, petrochemical, refining, chemical, and steel industries. Since there are no standard duct sizes, and due to the wide range of pressure and temperature combinations, each rectangular metal expansion joint is custom-engineered to provide the most economical design that will absorb the thermal movements of the system in which it is installed.

General arrangement of rectangular expansion joints with supported sides

General arrangement of rectangular expansion joints with supported sides

Features:

- Absorbs axial and lateral movements

- Variety of bellows geometry (for long straight sides)

- Normal guiding is required

- Manufactured for a wide variety of materials

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Like circular expansion joints, rectangular expansion joints absorb three types of movement: axial, lateral and angular. For the purpose of designing rectangular bellows, it is critical to know in which direction the lateral and angular movements will occur, i.e. parallel to the long and/or short side of the bellows.

55' Long by 14'-6" Wide Rectangular Metallic Expansion Joint

Unlike circular bellows where the pressure stress is a circumferential membrane (hoop) stress, the rectangular bellows must be designed for longitudinal (beam) bending stresses. Long unsupported lengths must frequently be supported to prevent excessive deflection and stresses of the bellows element. In certain applications, covers and liners can perform the function of pressure supports.

View more information of Rectangular Metallic Expansion Joints

Rectangular Metallic Expansion Joint with Cor-ten Flanges and Refractory Lining for a FCC Duct

September 21st, 2010 Comments off

Rectangular Metallic Expansion Joint with Cor-ten Flanges and Refractory Lining for a FCC Duct

This rectangular metallic expansion joint is fabricated with 321 stainless steel bellows and Cor-ten flanges. The inside of this unit is lined with both vibra cast and abrasion resistance refractory. The dimensions are 65″ x 81″ x 41-1/2″ overall length and the assembly weighs 3,900 lb. All welds are 100% dye penetrant examined and the design conditions are 1400°F with 5 PSIG.

55′ Long by 14’6″ Rectangular Metal Expansion Joint

January 26th, 2010 Comments off
55' Long by 14' 6" Rectangular Metal Expansion Joint

55' Long by 14' 6" Rectangular Metal Expansion Joint

U.S. Bellows, Inc. fabricated two metallic expansion joints on an expedited schedule. The expansion joints were fabricated from COR-TEN ASTM 588 carbon steel and are designed for 1.2 PSI at temperatures up to 748°F. The expansion joints were designed for an axial compression of 1.5″ and a lateral resultant movement of 1.84″. The entire expansion joint was shipped to the job site in one piece. This avoided having to splice weld the expansion joint into one piece, which saved the customer countless assembly man hours in the field.

Rectangular Metal Bellows with Round Corners

November 26th, 2008 Comments off
Rectangular Metal Bellows with Round Corners

Rectangular Metal Bellows with Round Corners

These rectangular metal bellows are fabricated entirely from ASTM A-240 type 304 stainless steel. The larger bellows measures 240″ x 80″. The smaller bellows measures 157″ x 65″. The design conditions were 1 PSIG at 1,000ºF. Both metal bellows are designed with three convolutions with round corners. The metal bellows welds were 100% dye-penetrant examined and soap and air tested prior to shipment. These bellows are designed to be installed at the ductwork connection to a large steam boiler.

84" Long Rectangular Metallic Expansion Joint

July 16th, 2008 Comments off
84" Long Rectangular Metallic Expansion Joint

84" Long Rectangular Metallic Expansion Joint

This rectangular metallic expansion joint measures 22″ x 84″ x 11″ face-to-face and is fabricated from 316 stainless steel bellows and carbon steel flanges. This expansion joint is designed to absorb axial compression in a hot air duct system to a fan inlet. The bellows have three convolutions with mitered corners. The expansion joint was 100% dye-penetrant examined and soap and air tested prior to being shipped to a power plant.

Response to a Local Emergency by Refurbishing a 36" Rectangular Metal Expansion Joint

December 5th, 2007 Comments off
Response to a Local Emergency by Refurbishing a 36" Rectangular Metal Expansion Joint

Response to a Local Emergency by Refurbishing a 36" Rectangular Metal Expansion Joint

U.S. Bellows, Inc. refurbished a rectangular metal expansion joint on an emergency basis for a local chemical plant. Upon arrival, the expansion joint was acid washed and dye-penetrant examined for any cracks in the metal. The expansion joint bellows were then repaired, retested and sent back to the customer in a matter of two days. The expansion joint measures 21″ x 26″ x 36 3/8″. The bellows are fabricated from Inconel® 625 LCF material. The rest of the assembly is fabricated from Inconel® 600 material. The design temperature is 660°F and the design pressure is 20 PSIG. The expansion joint was soap-air bubble tested and dye-penetrant examined before being returned.

Tandem Rectangular Expansion Joint for Turbine Exhaust

October 15th, 2004 Comments off
Tandem Rectangular Expansion Joint for Turbine Exhaust

Tandem Rectangular Expansion Joint for Turbine Exhaust

The expansion joint weights more than 1,700 lbs. and is capable of +/- 1/4 axial movement and +/- 1/8 lateral movement. It is designed to operate under designed pressures ranging from full vacuum to 15 psig at 250 degrees. The bellows and liner of the expansion joint are made of 304 stainless steel with a carbon steel flange and duct. To insure quality, the product was 100% dye-penetrant tested prior to shipping.

57" x 96" Rectangular Seal Expansion Joints for a Chemical Refinery in TX

July 2nd, 2004 Comments off
57 x 96 Rectangular Seal Expansion Joints for a Chemical Refinery in TX

57 x 96 Rectangular Seal Expansion Joints for a Chemical Refinery in TX

U.S. Bellows, Inc. recently fabricated four rectangular primary flexible seal joints for sliding flanged connections. Designed at 2 PSIG for 1350°F, the seal joints provide for one inch of axial movement to prevent damage to flange connections. EJMA Standards and B31.3 code were used in the design and fabrication of these joints. The purpose of the rectangular seal expansion joint is to prevent leakage to outside of the burney windbox. The corners are double mitered to reduce stress. Inconel® 625LCF material was used in fabricating the bellows while A240 tp 310 material was used for the frame. An air test at 5 PSIG was implemented as well as dye-penetrant test to ensure product quality.

Three 12' x 8' Rectangular Expansion Joints with Full Radius Corners

August 1st, 2003 Comments off
Three 12' x 8' Rectangular Expansion Joints with Full Radius Corners

Three 12' x 8' Rectangular Expansion Joints with Full Radius Corners

Expansion Joint in Paint Shop

Expansion Joint in Paint Shop

Three 12′- 0" x 8′- 0" Rectangular Expansion Joints with Full Radius Corners for a Chemical Plant in Texas

Three 12′- 0" x 8′- 0" Rectangular Expansion Joints with Full Radius Corners for a Chemical Plant in Texas

U.S. Bellows, Inc. recently manufactured three 12′ – 0″ x 8′ – 0″ rectangular expansion joints designed at 5 PSIG and 650 °F.  The expansion joints are fabricated with full radius corners which allow for an increased cycle life. The bellows are formed from Inconel® 625 SB-443 GR. 1 and the rest of the assembly is fabricated from A516-70. The long seam welds were 100% x-rayed.  A 100% dye-penetrant test was performed on the attachment welds.

71"x143" Rectangular Expansion Joint for an Oil Refinery in India

January 4th, 2002 Comments off
71"x143" Rectangular Expansion Joint for an Oil Refinery in India

71"x143" Rectangular Expansion Joint for an Oil Refinery in India

U.S. Bellows, Inc., the expansion joint division of Piping Technology & Products, Inc., designed and fabricated a 71 x 143 rectangular expansion joint for an oil refinery in India. The expansion joint was fabricated from SS 316 L, designed at 18 psig at 417°F. It is equipped with a liner and rounded corner bellows design. EJMA Standards and B31.3 code were used in the design and fabrication of this joint.

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