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11 Foot Diameter Hinged Expansion Joints Designed for Vacuum Service in an Air-Cooled Condenser Unit in New York

July 30, 2018

Hinged expansion joint 152499

Type: Single Hinged Expansion Joints
Size: 64″ length x 127″ diameter
Material: Carbon Steel and 304 Stainless Steel
Design Operating Temperature Range: -10°F to 121°F
Pressure: 15 PSIG
Movement: 0.6° of Angular Rotation
Testing: 100% Dye Penetrant Test | Vaccum tested at 28.5″ of Mercury | 100% X-Rayed.

U.S. Bellows custom designed Single Hinged Expansion Joints for vacuum service in high-velocity steam and condensate duct for an air-cooled condenser unit in New York. The bellows are fabricated from a 304 stainless steel. The weld-ends and hardware are fabricated from carbon steel. The units are 127″ in diameter and 64″ overall length. They are designed for an operating pressure at full vacuum to 15 psi at -10 to 121°F and 0.6° of angular rotation. The units were vacuum tested at 28.5″ of mercury, 100% dye-penetrant examined, and the bellows longitudinal seams were 100% X-rayed.

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24 Foot Long Universal Expansion Joint Custom Designed for a Steam Turbine

July 16, 2018


Type: Rectangular metallic Universal Expansion Joint
Size: 291.75″ long x 62″ wide x 76″ high
Design:  Operating Temperature Range: 850°F
Pressure: 1.5 PSIG
Movement: 1.5″ Axial Compression
Material:  A36 Carbon Steel and 304 Stainless Steel
Testing: 100% Dye Penetrant Test and Pneumatic Test

U.S. Bellows custom designed this universal rectangular expansion joint for a steam turbine facility in Alaska. The bellows and liner were fabricated from 304 stainless steel and the weld ends from A36 carbon steel. The unit is 62″ wide, 291.75″ in length, and 76″ in height. It is designed for an operating temperature up to 850°F at 1.5 psig and 1.5″ of axial compression. The expansion joint was 100% dye-penetrant tested and pneumatic tested prior to shipment.

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Big Ton Spring Supports for an Oil Refinery in Australia

July 2, 2018

PT&P Custom Designed Big Ton Spring Supports for an Oil Refinery in Australia


Type: Big Ton Spring Supports
Material: Carbon Steel w/ HDG Finish
Design: 13,457 lb. Load | 0.35″ Vertical
Testing: Load and Travel Tests

These big ton springs are used in supporting large heavy units such as compressors, vessels and pumps in power and petrochemical plants. The housing and frame are fabricated from carbon steel and hot-dipped galvanized, and the spring coils are dipped in a neoprene coating. The units are 48” x 40” x 20”. The big ton spring support is designed to allow limited movement of 0.35″ upwards and an operating load of 13,457 lb. This design saved the customer from having to entirely redesign the piping system, which saved them thousands of dollars. Load and travel tests were performed prior to shipping to an oil refinery in Australia.

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