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  Expansion Joint Engineering

Engineering and designing is done per EJMA equations as well as per the latest revisions of the ASME B31.3, ASME B31.1, and ASME Section 8, Division 1.  U.S. Bellows/PT&P designs are performed using in-house developed design software and calculations further checked using hand calculations.  U.S. Bellows/PT&P also has full in-house finite element analysis capabilities and we often use this methodology to prove designs.

Capabilities

Metal forming:

Hydraulic shears to handle 10 feet of plate up to 1 inch thick mild steel.
Break presses to handle 14 feet of plate up to ¾" thick mild steel.
Miscellaneous forming, cutting, and punching machines, including a 50-ton Mubea iron-worker and a  100-ton mechanical.
Two pyramid plate rollers handle 10 feet of plate up to 5/8 of an inch thick.
350-ton radial expander.
Angle rolling to diameters in excess of 12 feet.
Plasma cutting up to 2 inches
Flame cutting 8 torch, computer controlled.
Horizontal and vertical band saws.

Bellows forming:

Roll forming from 24 inches through 15 feet in diameter.
Expanding mandrel forming from 2 inches through 120 inches in diameter.
Automatic TIG flat bed welders.
Bellows reroll and planishing machines.

Machining:

End Mill. 36 inch travel.
Bridgeport.  Lateral boring to 6 inch diameter and milling with a tilt head on a 36 inch bed.
Drill presses with 48 inch bed height.
Surface tables.
General ability to mill, grind, turn, tap, thread, bore, and chamfer material up to 12 inches in diameter and 36 inches in length.
 
  
 

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U.S. Bellows, Inc. Designed and Fabricated 50 Universal Expansion Joints for an Air Force Base in New Mexico (Ref#91376-A1, EA) 11/14/2007
U.S. Bellows, Inc. fabricated 50 expansion joints from 304L stainless steel. The expansion joints were 6" and 8" sizes. The 6" expansion joints are 24" face to face and the 8" expansion joints are 26" face to face. All of the expansion joints are fabricated with liners that are also made with 304L stainless steel. The design temperature was 200°F and the design pressure was 200 PSIG. The expansion joints were dye-penetrant tested and hydro tested at 300 PSIG. U.S. Bellows, Inc. provides 100% customer satisfaction in terms of quality and delivery.

 

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