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Read MoreU.S. Bellows custom designed this single tied expansion joint for an oil refinery in Saudi Arabia. The bellows and liner are fabricated from 304 stainless steel and the cover, tie rods, and flanges are carbon steel. This expansion joint is 30″ in diameter and is 24″ in length. The unit is designed for 800°F at 275 psig and capable of 1″ axial movement. Prior to shipment, all welds were dye penetrant examined, hydrotested, and the bellows longitudinal weld was 100% x-rayed.
Read MoreU.S. Bellows custom designed single expansion joints for an oil refinery in China. They were fabricated with Incoloy 800H bellows and ASTMA 240TP 304H stainless steel weld ends. The expansion joints have a diameter of 6″ with an overall length of 11″. The assemblies were designed for a spring rate of 362 lb./in., 1″ axial movement at 1112°F and 5 psig. All expansion joints were dye penetrant examined and hydro-tested prior to shipment.
Read MoreThis 42″ dia. hinged universal expansion joint was designed with pantographic linkage flue gas application in a Columbian refinery. The redundant two-ply testable bellows are fabricated from Inconel 625 LCF and the remainder of the assembly was fabricated with refractory lined carbon steel. It is designed for an axial movement of 1.1″ at 1,000°F and 50 psig. All welds were 100% dye penetrant examined, the bellows longitudinal seam and pipe seams were 100% X-ray examined. The complete assembly was pneumatically tested to 50 psig due to the internal insulation. All the pressure bearing components such as the hinge plates, pantrographic linkage, gimbal ring and hinge support rings were designed and engineered per latest EJMA, ASME B31.3 codes
Read MoreThese custom single expansion joints were manufactured for a rare isotopes beams lab at Michigan State University. They are 1″ and 1-1/2″ in diameter and fabricated entirely of 304 stainless steel. The expansion joints are capable of 1″ movement, 380 lb. and 150 psig at 400°F. Dye penetrant exam and helium leak test was conducted prior to shipment.
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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.
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US Bellows provided the total engineering, design, and fabrication package for this project including expansion joints, elbows, duct work, saddle supports, F-type variable spring supports, slide plates, and pipe anchors.
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 were performed prior to shipping.
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This single tied expansion joint is custom designed with Inconel® 825 bellows with carbon steel flanges, liners and pipes. It is 76″ I.D., 90″ O.D. and is 31-1/2″ long. It was designed for 1,900°F at 100 psig with 1″ compression. A meshed expanded metal cover was installed to allow for hot air to escape. Tests performed included a 100% dye penetrant, x-ray, and ultrasonic on pressure bearing welds. Finished units were hydro-tested at 1.5 times the design pressure. The expansion joints were designed with an inner liner to accommodate for easier field installation of refractory lining.
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This fabric expansion joint is 13″ long by 5″ wide, and 21″ deep. The frame and liner are fabricated from 304 stainless steel, and the belt is a fiberglass reinforced PTFE material. Prior to shipping for installation in a power generator unit, all the welds were dye penetrant examined.
Read MoreThis tied universal expansion joint is designed to carry hot gas up to temperatures of 1022°F and pressure up to 5 PSIG. It has a 66″ inside diameter and is 72″ in overall length. The design movements are 4″ lateral and 4.5″ axial compression. The bellows’ material is Inconel® 825 with carbon steel weld ends. The bellows and pipe longitudinal weld seams were 100% x-rayed prior to a 5 PSIG air test and then dye-penetrant examined after testing.
