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.
These fabric expansion joints are made of stainless steel liner, flanged ends, backing bars, and PTFE impregnated fiberglass. They weigh between 370 lbs – 380 lbs and measure 81.15″ long, 18.44″ wide, and 16″ high. They are used in high temperature air ducts to allow for expansion. Its thermal growth consists of +/- 1/8 X-Y-Z directions. It is capable of withstanding 400°F at +/- 0.8 PSIG at a maximum flow of 130,650 ACFM. Standard testing was performed for quality assurance.
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 cycles
These rectangular fabric expansion joints measure 136″ x 54″ with a weight of 135 lbs each. They were fabricated out of fiberglass fabric with stainless steel frames and are designed for ± 5 PSIG and 400°F. The expansion joints were manufactured according to specific customer specifications.
The expansion joints consist of bellows formed by 1/8” thick neoprene sheet and A36 carbon steel flanges coated with a special finish per customer’s request. These expansion joints are 42” x 7 ¾”. A dye-penetrant test was performed on the welds prior to shipping to ensure quality. The turn around for this product was four days.
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.
The rectangular fabric expansion joints consisted of two carbon and stainless steel frames separated by a high-temperature Silica fabric. The frames measured 13” × 37” × 6”, 14½” × 20½” × 6” and 17¼” × 17¼” × 4” and weighed 90, 115, and 170 lb. Each expansion joint was designed for a 15” Water Column (W.C.) with a temperature of 750°F and allowed for movement ranging from ±½” to ±1” in both the axial and lateral directions.
U.S. Bellows, Inc. custom designed and manufactured a 60” diameter and 120” long universal expansion joint for a chemical plant in Louisiana.This metallic expansion joint was fabricated from 304 stainless steel bellows and carbon steel. It was designed for 10PSIG and 550°F. To ensure quality a 100% dye-penetrant, radiography, and soap leak test was performed prior to shipment.
This 3,400 lb. expansion joint is capable of 2.3″ lateral movement and 1.5″ axial movement and was designed for 65 PSIG and 1076ºF. It was made with SB-409 alloy 800 bellows and 316H piping and gimbal components. The dimension of this expansion joint is 24″ x 168″ x 71″. This gimbal expansion joint contains two sets of hinge pins or pivots with the axis of each set perpendicular to each other. To ensure the quality of the product, the joints were 100% X-rayed and hydro-tested at 120 PSIG prior to delivery.
U.S. Bellows, Inc. custom designed and manufactured three 3″ diameter and 36″ long universal expansion joints for a power plant project in South Carolina. These expansion joints, fabricated from 2-ply A240-304H stainless steel bellows, are designed for 170 PSIG and 1200°F per EJMA specifications.
This 36’-0″ long refractory lined tied universal expansion joint weighs 54,000 lb. and has two-ply Inconel® 625 LCF bellows, tie rods, slotted hinges, insulation bags, and liner seals. It is designed to operate at 58 PSIG and temperatures up to 1,450° F. The expansion joint was preset for 6” lateral travel and is capable of lateral travel up to 13”.
Expansion Joint Ready for Inspection
U.S. Bellows, Inc. recently custom designed and fabricated 17 rectangular fabric expansion joints for a power system company in Texas. The expansion joints measure 54″ x 136″ and weigh 135 lb. each. They are designed for operation up to 5 PSIG and temperatures up to 400°F. The expansion joints are made of fiberglass fabric and have stainless steel frames