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About Pipe and Fittings
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Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
Fitting Type
High-Pressure Stainless Steel Unthreaded Pipe Flanges
Forged Flanges
 |
Stub End with Straight Adapter (Front) |
 |  |  |
Butt Weld | Slip-On | Socket-Connect |
Forged flanges have better strength than cast flanges.
Butt-Weld Fitting Connection—Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush to pipe, creates a trough for a strong weld.
Slip-on-Weld Fitting Connection—Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
Stub-End Fitting Connection—Stub-end flanges are also known as lap-joint flanges. Use them with a stub-end straight adapter (not included). The stub-end straight adapter slides into the flange and welds to pipe (not the flange). Since the flange isn’t welded to the pipe, it can be disconnected easily for frequent cleaning and inspecting.
304/304L Stainless Steel—Flanges hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
Pipe Size | Dash Size | Bolt Hole | 304/304L Stainless Steel | 316/316L Stainless Steel | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Flanged Connection Surface (B) | Flange OD | For Bolt Dia. | Dia. | No. Of | Bolt Circle Dia. | Pressure Class | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | Each | Each | ||||
Butt Weld | ||||||||||||||||||
| 1/2 | 1/2 | 08 | 08 | Raised | 3 3/4" | 1/2" | 0.62" | 4 | 2 5/8" | 600 | 1,200 psi @ 72° F | 825 psi @ 400° F | ——— | 0 | 1503N31 | 000000 | ||
| 1 | 1 | 16 | 16 | Raised | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | 600 | 1,200 psi @ 72° F | 825 psi @ 400° F | 1538N57 | 000000 | 1503N33 | 000000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | Raised | 6 1/8" | 3/4" | 0.875" | 4 | 4 1/2" | 600 | 1,200 psi @ 72° F | 825 psi @ 400° F | 1538N59 | 000000 | 1503N35 | 000000 | ||
| 2 | 2 | 32 | 32 | Raised | 6 1/2" | 5/8" | 0.75" | 8 | 5" | 600 | 1,200 psi @ 72° F | 825 psi @ 400° F | 1538N61 | 000000 | 1503N36 | 000000 | ||
| 3 | 3 | 48 | 48 | Raised | 8 1/4" | 3/4" | 0.88" | 8 | 6 5/8" | 600 | 1,200 psi @ 72° F | 825 psi @ 400° F | ——— | 0 | 1503N38 | 000000 | ||
| 4 | 4 | 64 | 64 | Raised | 10 3/4" | 7/8" | 1" | 8 | 8 1/2" | 600 | 1,200 psi @ 72° F | 825 psi @ 400° F | 1538N64 | 000000 | ——— | 0 | ||
Slip-On Weld Female | ||||||||||||||||||
| 3/4 | 3/4 | 12 | 12 | Raised | 4 5/8" | 5/8" | 0.75" | 4 | 3 1/4" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | ——— | 0 | 1503N12 | 00000 | ||
| 1 | 1 | 16 | 16 | Raised | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N17 | 00000 | 1503N13 | 00000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | Raised | 6 1/8" | 3/4" | 0.875" | 4 | 4 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N19 | 000000 | ——— | 0 | ||
| 2 | 2 | 32 | 32 | Raised | 6 1/2" | 5/8" | 0.75" | 8 | 5" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N21 | 000000 | 1503N16 | 000000 | ||
| 3 | 3 | 48 | 48 | Raised | 8 1/4" | 3/4" | 0.88" | 8 | 6 5/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N23 | 000000 | ——— | 0 | ||
| 4 | 4 | 64 | 64 | Raised | 10 3/4" | 7/8" | 1" | 8 | 8 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N24 | 000000 | ——— | 0 | ||
Socket-Connect Female | ||||||||||||||||||
| 1/2 | 1/2 | 08 | 08 | Raised | 3 3/4" | 1/2" | 0.62" | 4 | 2 5/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | ——— | 0 | 1503N21 | 00000 | ||
| 3/4 | 3/4 | 12 | 12 | Raised | 4 5/8" | 5/8" | 0.75" | 4 | 3 1/4" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | ——— | 0 | 1503N22 | 00000 | ||
| 1 | 1 | 16 | 16 | Raised | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N37 | 00000 | 1503N23 | 000000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | Raised | 6 1/8" | 3/4" | 0.875" | 4 | 4 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N39 | 000000 | 1503N25 | 000000 | ||
| 2 | 2 | 32 | 32 | Raised | 6 1/2" | 5/8" | 0.75" | 8 | 5" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N41 | 000000 | 1503N26 | 000000 | ||
| 3 | 3 | 48 | 48 | Raised | 8 1/4" | 3/4" | 0.88" | 8 | 6 5/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N43 | 000000 | ——— | 0 | ||
Stub End | ||||||||||||||||||
| 1 | 1 | 16 | 16 | Flat | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N77 | 00000 | ——— | 0 | ||
| 4 | 4 | 64 | 64 | Flat | 10 3/4" | 7/8" | 1" | 8 | 8 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N84 | 000000 | ——— | 0 | ||
Forged Blind Flanges
 |  |
Front | Raised Surface on Back |
Forged flanges have better strength than cast flanges.
304/304L Stainless Steel—Flanges hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
Bolt Hole | 304/304L Stainless Steel | 316/316L Stainless Steel | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Dash Size | Flanged Connection Surface | Flange OD | For Bolt Dia. | Dia. | No. Of | Bolt Circle Dia. | Pressure Class | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | Each | Each | ||||
Flanged | ||||||||||||||||
| 1/2 | 08 | Raised | 3 3/4" | 1/2" | 0.62" | 4 | 2 5/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N91 | 000000 | 1503N51 | 000000 | ||
| 3/4 | 12 | Raised | 4 5/8" | 5/8" | 0.75" | 4 | 3 1/4" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N92 | 00000 | ——— | 0 | ||
| 1 | 16 | Raised | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N93 | 00000 | 1503N53 | 000000 | ||
| 1 1/4 | 20 | Raised | 5 1/4" | 5/8" | 0.75" | 4 | 3 7/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N94 | 000000 | ——— | 0 | ||
| 1 1/2 | 24 | Raised | 6 1/8" | 3/4" | 0.875" | 4 | 4 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N95 | 000000 | 1503N55 | 000000 | ||
| 2 | 32 | Raised | 6 1/2" | 5/8" | 0.75" | 8 | 5" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N96 | 000000 | 1503N56 | 000000 | ||
| 2 1/2 | 40 | Raised | 7 1/2" | 3/4" | 0.88" | 8 | 5 7/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N97 | 000000 | 1503N57 | 000000 | ||
| 3 | 48 | Raised | 8 1/4" | 3/4" | 0.88" | 8 | 6 5/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N98 | 000000 | 1503N58 | 000000 | ||
| 4 | 64 | Raised | 10 3/4" | 7/8" | 1" | 8 | 8 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1538N99 | 000000 | 1503N59 | 000000 | ||
High-Pressure Iron and Steel Unthreaded Pipe Flanges
Forged Flanges
 |  |  |
Butt Weld (Front) | Butt Weld (Raised Surface on Back) | Slip-On Weld (Front) |
 |  |  |
Slip-On Weld (Raised Surface on Back) | Socket Connect (Front) | Socket-Connect (Raised Surface on Back) |
Pipe Size | Dash Size | Bolt Hole | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Flanged Connection Surface (B) | Flange OD | For Bolt Dia. | Dia. | No. Of | Bolt Circle Dia. | Pressure Class | Material | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | Each | |||
Butt Weld | |||||||||||||||||
| 1 | 1 | 16 | 16 | Raised | 4.88" | 3/4" | 3/4" | 4 | 3 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K448 | 000000 | ||
| 2 | 2 | 32 | 32 | Raised | 6 1/2" | 3/4" | 3/4" | 8 | 5" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K451 | 00000 | ||
| 3 | 3 | 48 | 48 | Raised | 8 1/4" | 0.88" | 0.88" | 8 | 6.62" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K452 | 00000 | ||
| 4 | 4 | 64 | 64 | Raised | 10 3/4" | 1" | 1" | 8 | 8 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K453 | 000000 | ||
Slip-On Weld Female | |||||||||||||||||
| 1 | 1 | 16 | 16 | Raised | 4.88" | 3/4" | 3/4" | 4 | 3 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K435 | 00000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | Raised | 6.12" | 0.88" | 0.88" | 4 | 4 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K436 | 00000 | ||
| 2 | 2 | 32 | 32 | Raised | 6 1/2" | 3/4" | 3/4" | 8 | 5" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K437 | 00000 | ||
| 3 | 3 | 48 | 48 | Raised | 8 1/4" | 0.88" | 0.88" | 8 | 6.62" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K438 | 00000 | ||
| 4 | 4 | 64 | 64 | Raised | 10 3/4" | 1" | 1" | 8 | 8 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K439 | 000000 | ||
| 6 | 6 | 96 | 96 | Raised | 14" | 1.12" | 1.12" | 12 | 11 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K441 | 000000 | ||
Socket-Connect Female | |||||||||||||||||
| 1 | 1 | 16 | 16 | Raised | 4.88" | 3/4" | 3/4" | 4 | 3 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K428 | 00000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | Raised | 6.12" | 0.88" | 0.88" | 4 | 4 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K429 | 00000 | ||
| 2 | 2 | 32 | 32 | Raised | 6 1/2" | 3/4" | 3/4" | 8 | 5" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K431 | 00000 | ||
| 3 | 3 | 48 | 48 | Raised | 8 1/4" | 0.88" | 0.88" | 8 | 6.62" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K432 | 00000 | ||
| 4 | 4 | 64 | 64 | Raised | 10 3/4" | 1" | 1" | 8 | 8 1/2" | 600 | Steel | Not Rated | Not Rated | 6806K433 | 000000 | ||
Forged Blind Flanges
 |  |
Front | Raised Surface on Back |
Bolt Hole | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Dash Size | Flanged Connection Surface | Flange OD | For Bolt Dia. | Dia. | No. Of | Bolt Circle Dia. | Pressure Class | Material | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | Each | |||
Flanged | |||||||||||||||
| 1 | 16 | Raised | 4.88" | 3/4" | 3/4" | 4 | 3 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K455 | 000000 | ||
| 1 1/2 | 24 | Raised | 6.12" | 0.88" | 0.88" | 4 | 4 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K456 | 00000 | ||
| 2 | 32 | Raised | 6 1/2" | 3/4" | 3/4" | 8 | 5" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K457 | 00000 | ||
| 3 | 48 | Raised | 8 1/4" | 0.88" | 0.88" | 8 | 6.62" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K458 | 00000 | ||
| 4 | 64 | Raised | 10 3/4" | 1" | 1" | 8 | 8 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K459 | 000000 | ||
| 6 | 96 | Raised | 14" | 1.12" | 1.12" | 12 | 11 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K461 | 000000 | ||
High-Pressure Stainless Steel Threaded Pipe Flanges
Forged Flanges
 |  |
Front | Raised Surface on Back |
Forged flanges have better strength than cast flanges.
304/304L Stainless Steel—Flanges hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
Pipe Size | Dash Size | Bolt Hole | 304/304L Stainless Steel | 316/316L Stainless Steel | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Flanged Connection Surface (B) | Flange OD | For Bolt Dia. | Dia. | No. Of | Bolt Circle Dia. | Pressure Class | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | Each | Each | ||||
NPT Female | ||||||||||||||||||
| 1/2 | 1/2 | 08 | 08 | Raised | 3 3/4" | 1/2" | 0.62" | 4 | 2 5/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N25 | 000000 | 1501N21 | 000000 | ||
| 3/4 | 3/4 | 12 | 12 | Raised | 4 5/8" | 5/8" | 0.75" | 4 | 3 1/4" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N26 | 00000 | 1501N22 | 000000 | ||
| 1 | 1 | 16 | 16 | Raised | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N27 | 000000 | 1501N23 | 000000 | ||
| 1 1/4 | 1 1/4 | 20 | 20 | Raised | 5 1/4" | 5/8" | 0.75" | 4 | 3 7/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N28 | 000000 | 1501N24 | 000000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | Raised | 6 1/8" | 3/4" | 0.88" | 4 | 4 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N29 | 000000 | 1501N25 | 000000 | ||
| 2 | 2 | 32 | 32 | Raised | 6 1/2" | 5/8" | 0.75" | 8 | 5" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N31 | 000000 | 1501N26 | 000000 | ||
| 2 1/2 | 2 1/2 | 40 | 40 | Raised | 7 1/2" | 3/4" | 0.88" | 8 | 5 7/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N32 | 000000 | ——— | 0 | ||
| 3 | 3 | 48 | 48 | Raised | 8 1/4" | 3/4" | 0.88" | 8 | 6 5/8" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N33 | 000000 | 1501N28 | 000000 | ||
| 4 | 4 | 64 | 64 | Raised | 10 3/4" | 7/8" | 1" | 8 | 8 1/2" | 600 | 1,200 psi @ 72° F | 840 psi @ 400° F | 1441N34 | 000000 | ——— | 0 | ||
High-Pressure Iron and Steel Threaded Pipe Flanges
Flanges
 |  |
Front | Raised Surface on Back |
Pipe Size | Bolt Hole | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | Flanged Connection Surface (B) | Flange OD | For Bolt Dia. | Dia. | No. Of | Bolt Circle Dia. | Pressure Class | Material | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | Each | |||
NPT Female | |||||||||||||||
| 1 | 1 | Raised | 4 7/8" | 3/4" | 3/4" | 4 | 3 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K422 | 000000 | ||
| 1 1/2 | 1 1/2 | Raised | 6 1/8" | 7/8" | 0.88" | 4 | 4 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K423 | 00000 | ||
| 2 | 2 | Raised | 6 1/2" | 3/4" | 3/4" | 8 | 5" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K424 | 00000 | ||
| 3 | 3 | Raised | 8 1/4" | 7/8" | 0.88" | 8 | 6.62" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K425 | 000000 | ||
| 4 | 4 | Raised | 10 3/4" | 1" | 1" | 8 | 8 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K426 | 000000 | ||
| 6 | 6 | Raised | 14" | 1 1/8" | 1.12" | 12 | 11 1/2" | 600 | Steel | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 6806K427 | 000000 | ||
