O-Rings
     
S P Eng. carries a full range of Expansion Joints to suit any process plant application including thermal expansion, vibration absorption and noise reduction in piping and flue systems.
 
Our website includes a limited selection of our most popular joints: Economy, Premium and Teflon. 
 
For high temperature (>400F) or high pressure applications, call to ask about our range of Metal Joints.
     
Economy Expansion Joints
     
Our most economical full-pressure joint. A molded joint with 1 through 4 arches and large movement per arch. Arches may be filled or unfilled. Sizes from 11/2 in. to 24 in. Standard 150# ASA drilling. Up to 400F operating temperature depending on material. Up to 150 psi working pressure depending on size. Vacuum rating up to 25 in. Hg depending on size. The following table covers our single arch economy joint in sizes 11/2 in. through 12 in. 
     
For greater axial movement call about our multiple arch joints. For greater working pressure and vacuum rating or for custom face-to-face distance and drilling-see our premium joints below.
     
Pipe Size (in.) Face to Face (in.) Axial Com-
pression (in.)
Axial Exten-
sion (in.)
Lateral Deflection (in.) Angular Rotation (deg.) Torsional Rotation (deg.) Rated Working Pressure (psi) Min. Burst Pressure (psi) Vacuum Rating
(in. Hg)
1 1/2 6 1 3/4 3/4 3/4 25 3 150 600 15
2 6 1 3/4 3/4 3/4 25 3 150 600 15
2 1/2 6 1 3/4 3/4 3/4 25 3 150 600 15
3 6 1 3/4 3/4 3/4 20 3 150 600 15
4 6 1 3/4 3/4 3/4 20 3 150 600 15
5 6 1 3/4 3/4 3/4 18 3 150 600 15
6 6 1 3/4 3/4 1 16 3 150 600 15
8 6 1 3/4 3/4 1 11 3 150 600 15
8 8 1 3/4 3/4 1 11 3 150 600 15
10 8 1 3/4 3/4 1 10 3 150 600 15
12 8 1 3/4 3/4 1 9 3 150 600 15
     
Premium Expansion Joints
     
A very versatile, robust, hand-made joint available with 1 through 4 arches. Arches may be filled or unfilled. Sizes from 1/2 in. to 144 in. with custom face-to-face distances. Available with any drilling configuration. Up to 400F operating temperature depending upon material. Standard working pressures to 250 psi depending on size (higher pressures available). Vacuum rating up to 30 in. Hg for all sizes. Also available Teflon®-lined for aggressive chemical environments. The following table covers our single arch premium joint in sizes 2 in. through 12 in. 
     
For greater movement call about our multiple arch joints. Larger sizes, higher working pressure, custom face-to-face distances and Teflon® lining available.
     
Pipe Size (in.) Std Face-to-
Face (in.)
Axial Com-
pression (in.)
Lateral Deflec-
tion (in.)
Angular Rotation (deg.) Torsional Rotation (deg.) Std Working Pres. (psi) Min. Burst Pres. (psi) Vacuum Rating (in. Hg)
2 6 3/4 1/2 14.5 3 165 660 30
2 1/2 6 3/4 1/2 11.5 3 165 660 30
3 6 3/4 1/2 10.0 3 165 660 30
4 6 3/4 1/2 7.5 3 165 660 30
5 6 3/4 1/2 6.0 3 140 560 30
6 6 3/4 1/2 5.5 3 140 560 30
8 6 3/4 1/2 5.0 3 140 560 30
10 8 1 5/8 4.5 3 140 560 30
12 8 1 5/8 3.8 3 140 560 30
     
Teflon Based Materials
     
Teflon-based materials are able to withstand significantly more aggressive chemical environments (including highly oxidizing environments) than standard non-asbestos gasket materials. However their temperature, pressure and mechanical performance is inferior to standard non-asbestos gasket materials. Metal inserted and expanded PTFE are able to operate at higher pressures. 
     
Material Max T 
(F)
Max P 
(psi)
Creep Rel'n 
(%)
Applications/Features
Pure PTFE 500 800 35 - 55 Excellent chemical resistance.
Filled PTFE 500 1200 11 - 40 Excellent chemical resistance.
Filled PTFE - Metal Inserted 500 2500 20 Excellent chemical resistance. 316 SS perforated core.
Expanded PTFE 600 3000 30 Excellent chemical resistance. Highly compressible.
     
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