Externally Pressurized

WW

Weld End/Weld End

FF

Flange/Flange

Available Styles and Options:

• Single or dual bellows

• 150# or 300# pressure ratings (with appropriate 150# or 300# drilled flanges)

• Standard T-304 SS bellows or specify 316SS, 321SS, Inco 600, or Inco 625

• Anchor base is standard on dual units and optional on single units

• Ends can be flange x flange, weld x weld, or flange x weld

Externally Pressurized
Size O.A.L.
Effected Area (In.)2 Shell O.D. (In.)
Single Double
Axial Move FF WT. WW WT. Axial Move FF WT. WW WT.
2" 4 24-7/8 34 24-7/8 26 8 43-1/4 70 39-1/2 60 16 6-5/8
2-1/2" 4 25-1/8 40 24-1/2 29 8 43-1/4 79 39-1/2 65 16 6-5/8
8 38-5/8 58 38 47 16 75-1/4 126 71-1/2 112
3" 4 23-7/8 51 23-1/4 38 8 41-1/4 98 37-1/2 82 16 6-5/8
8 38-3/8 75 37-3/4 62 16 71-1/4 154 67-1/2 138
4" 4 23-7/8 66 24-1/4 59 8 42-1/2 153 38-3/4 127 35 8-5/8
8 37-7/8 110 37-1/4 94 16 73-3/4 242 70 216
5" 4 25 112 24-1/4 91 8 40-1/4 200 36 170 35 10-3/4
8 38-1/4 165 37-1/2 144 16 64-3/4 286 60-1/2 296
6" 4 25-1/2 138 24-3/4 115 8 40-1/4 222 36-1/4 184 54 10-3/4
8 38-1/2 200 37-3/4 177 16 64-3/4 316 60-3/4 278
8" 4 28-1/4 198 27-1/4 153 8 42-1/2 320 38-1/4 260 88 12-3/4
8 42 283 41 238 16 69 490 64-3/4 430
10" 4 27 240 26 186 8 45-1/4 450 40-1/2 364 118 14-1/2
8 40-1/4 342 39-1/4 238 16 78 706 73-1/4 620
12" 4 27 308 26 226 8 47-1/4 583 42-1/4 455 163 16-3/4
8 39-3/4 428 38-3/4 346 16 81-3/4 907 76-3/4 779
14" 4 28-1/4 491 24-1/2 293 8 47-1/2 709 42-1/4 529 196 18
8 45-1/2 671 41-3/4 473 16 82 1069 76-3/4 889
16" 4 28-3/4 547 24-1/2 329 8 48 774 42-1/4 574 354 24
8 46 749 41-3/4 530 16 82-1/2 1176 76-3/4 976
18" 4 29 652 24-1/2 364 8 48-1/4 893 42-1/4 663 354 24
8 46-1/4 875 41-3/4 588 16 82-3/4 1341 76-3/4 1081
20" 4 29-3/4 766 24-1/2 400 8 49 1054 42-1/4 724 501 28
8 47 1012 41-3/4 696 16 83-1/2 1544 76-3/4 1214
24" 4 30-1/4 961 24-1/2 472 8 49-1/2 1292 42-1/4 852 583 30
8 47-1/2 1250 41-3/4 761 16 84 1870 76-3/4 1430

*This table shows standard designs. For other movements, lengths, or sizes, contact us.

Externally Pressurized Expansion Joint – Construction

Fittings:

Flanges or beveled weld ends are standard.

Internal & External Guides:

Insures proper guiding of pipe inside joint.

Drain:

For draining liquids or location for installing a steam trap.

Externally Pressurized

Externally pressurized expansion joints are designed for use in straight pipe runs to accomodate for high pressure and large thermal expansion and contraction. External pressure is applied to th bellow via a gap between the internal flange and housing. This keeps the bellows from becoming unstable, thus, allowing a longer bellows to be manufactured.