This single expansion joint assembly was fabricated with a single-ply 304 stainless steel bellows, and carbon steel pipe, miter bends, and limit rods. It measured 12′-2″ from the center to center of the elbows. These bellows were designed with a low spring rate to meet the allowable forces and movements on the compressor inlet nozzle. All welds were air tested and spot x-rayed to assure quality and performance. This unit was completed in 3 weeks to meet the customer’s construction schedule.Read More
|This single reinforced expansion joint is 16″ in diameter and is 15-1/8″ in length. The expansion joint is fabricated with 316L stainless steel bellows, liner, weld ends, and bellows reinforcement. This expansion joint weighs 170 lbs and is used in a feed pre-heater. It is designed and fabricated to ASME Section VIII for 581 PSIG at 842°F with a travel capacity of 0.496″ compression. 100% Dye-Penetrate testing was performed for the bellow attachment welds as well as 100% X-Ray testing on the long seam welds of the bellows and pipe ends. In addition, Hydro-testing was performed at 764 PSIG to assure quality and performance.
These single reinforced expansion joints with equalizing rings are used in heat exchangers. The bellows are fabricated from ASTM B 443 Inconel 625 LCF. The weld ends and the reinforcing rings/root rings are carbon steel. The expansion joints are 52” and 57” diameter with an overall length of 15 ½” and 16 ½”. They are capable of moving 0.6” in extension at 158 PSIG at 300°F. The expansion joints were fabricated to ASME Section VIII. The bellows and pipe longitudinal weld seams were 100% X-Rayed. In addition, the expansion joints were 100% dye-penetrate examined and hydro tested to 205 PSIG for quality and performance assurance.Read More
The high-pressure expansion joint above is a single four convolution SB-443 INCO 625LCF bellow with 3 equalizing rings, 2 neck bands, 1 internal liner, and 2 weld ends all fabricated from SA-240 type 347 stainless steel. The equalizing rings enable the joint to withstand a maximum allowable pressure of 1,170 psig at 815°F. The equalizing rings allow the use of a thinner more compact and flexible bellow thereby saving space and increasing the expansion joint cycle life. This expansion joint is 14.25″ long with a calculated cycle life of 772 cyclesRead More
Single Tied Expansion Joint
This single tied expansion joint was designed to withstand 400 PSIG and 200°F. The bellow was manufactured using B443 material (Inconel® 625) with a 300 lb. carbon steel flange. It measures 8” x 16” with 3/16” lateral movement. Pressure testing and 100% dye-penetrant tests were performed to ensure quality.
U.S. Bellows, Inc. recently refurbished a 3″ O.A.L. single bellow with flanges for a marine vessel in Texas. Within a two day span, the replacement bellow was fabricated, welded to the existing 5/8″ flanges, and shipped to the marine vessel to resume operation. The replacement bellow, fabricated from 321 stainless steel, is designed for 150 PSIG and 800° F with 0.66″ of axial movement. To ensure quality, a 100% dye-penetrant test and a soap leak test was performed prior to delivery.Read More
U.S Bellows, Inc. manufactured 10″ single tied titanium expansion joints to be utilized in a chemical plant in Kingsport, Tennessee. These single expansion joints are bellows elements with end connections that allow movement in any direction or plane. However, the piping must also be guided in the same direction of the movement. The tie rods restrain the full pressure thrust. These expansion joints were 100% dye-penetrant examined before being shipped to the customerRead More