How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Standard-Wall Butt-Weld Stainless Steel Unthreaded Pipe Fittings
Also known as Schedule 40 fittings, these have thicker walls than our thin-wall stainless steel unthreaded butt-weld fittings. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Water
- Specifications Met: ASME B16.9, ASTM A403, MSS SP-43
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
316/316L Stainless Steel | |||||
|---|---|---|---|---|---|
Pipe Size | Wall Thick. | Lg. | Construction | Each | |
| 1/2 | 0.109" | 1 1/2" | Welded | 000000000 | 000000 |
| 3/4 | 0.113" | 1 1/2" | Welded | 000000000 | 00000 |
| 1 | 0.133" | 1 1/2" | Welded | 000000000 | 00000 |
| 1 1/4 | 0.14" | 1 7/8" | Welded | 000000000 | 00000 |
| 1 1/2 | 0.145" | 2 1/4" | Welded | 000000000 | 00000 |
| 2 | 0.154" | 3" | Welded | 000000000 | 00000 |
| 2 1/2 | 0.203" | 3 3/4" | Welded | 000000000 | 00000 |
| 3 | 0.216" | 4 1/2" | Welded | 000000000 | 00000 |
| 4 | 0.237" | 6" | Welded | 000000000 | 000000 |
| 6 | 0.28" | 9" | Welded | 000000000 | 000000 |
| 8 | 0.322" | 12" | Welded | 000000000 | 000000 |
Thin-Wall Butt-Weld Stainless Steel Unthreaded Pipe Fittings
Also known as Schedule 10 fittings, these are thin and lightweight. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Water
- Specifications Met: ASME B16.9, ASTM A403, MSS SP-43
- Pipe: Use Schedule 10 stainless steel
316/316L Stainless Steel | |||||
|---|---|---|---|---|---|
| Pipe Size | Wall Thick. | Lg. | Construction | Each | |
| 1/2 | 0.083" | 1 1/2" | Welded | 000000000 | 000000 |
| 3/4 | 0.083" | 1 1/2" | Welded | 000000000 | 00000 |
| 1 | 0.109" | 1 1/2" | Welded | 000000000 | 00000 |
| 1 1/4 | 0.109" | 1 7/8" | Welded | 000000000 | 00000 |
| 1 1/2 | 0.109" | 2 1/4" | Welded | 000000000 | 00000 |
| 2 | 0.109" | 3" | Welded | 000000000 | 00000 |
| 2 1/2 | 0.12" | 3 3/4" | Welded | 000000000 | 00000 |
| 3 | 0.12" | 4 1/2" | Welded | 000000000 | 00000 |
| 4 | 0.12" | 6" | Welded | 000000000 | 00000 |
| 6 | 0.134" | 9" | Welded | 000000000 | 000000 |
| 8 | 0.148" | 12" | Welded | 000000000 | 000000 |
| 10 | 0.165" | 15" | Welded | 000000000 | 000000 |
| 12 | 0.18" | 18" | Welded | 000000000 | 00000000 |
Standard-Wall Butt-Weld Steel Unthreaded Pipe Fittings
Butt-weld fittings allow for a smooth connection that provides maximum flow. They have beveled ends that, when flush to pipe, create a trough for a strong, permanent weld. Fittings are also known as Schedule 40. They are for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A234, ASME B16.9
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 steel
| Pipe Size | Lg. | Wall Thick. | Construction | Each | |
| 1/2 | 1 1/2" | 0.109" | Seamless | 000000000 | 000000 |
| 3/4 | 1 1/2" | 0.113" | Seamless | 000000000 | 00000 |
| 1 | 1 1/2" | 0.133" | Seamless | 000000000 | 00000 |
| 1 1/4 | 1 7/8" | 0.14" | Seamless | 000000000 | 00000 |
| 1 1/2 | 2 1/4" | 0.145" | Seamless | 000000000 | 00000 |
| 2 | 3" | 0.154" | Seamless | 000000000 | 00000 |
| 2 1/2 | 3 3/4" | 0.203" | Seamless | 000000000 | 00000 |
| 3 | 4 1/2" | 0.216" | Seamless | 000000000 | 00000 |
| 4 | 6" | 0.237" | Seamless | 000000000 | 00000 |
| 6 | 9" | 0.28" | Seamless | 000000000 | 000000 |
| 8 | 12" | 0.322" | Seamless | 000000000 | 000000 |
| 10 | 15" | 0.365" | Seamless | 000000000 | 000000 |
Thick-Wall Butt-Weld Steel Unthreaded Pipe Fittings
With thicker, stronger walls than our standard-wall butt-weld pipe fittings, these fittings stand up to your high strength applications. Weld them flush against pipe for a smooth connection that permits maximum flow. These fittings have beveled ends that create a trough for a leak-resistant, permanent weld. Made of steel, they’re for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A234
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 steel
| Pipe Size | Wall Thick. | Lg. | Construction | Each | |
| 1/2 | 0.147" | 1 1/2" | Seamless | 0000000 | 000000 |
| 3/4 | 0.154" | 1 1/2" | Seamless | 0000000 | 00000 |
| 1 | 0.179" | 1 1/2" | Seamless | 0000000 | 00000 |
| 1 1/4 | 0.191" | 1 7/8" | Seamless | 0000000 | 00000 |
| 1 1/2 | 0.2" | 2 1/4" | Seamless | 0000000 | 00000 |
| 2 | 0.218" | 3" | Seamless | 0000000 | 00000 |
| 2 1/2 | 0.276" | 3 3/4" | Seamless | 0000000 | 00000 |
| 3 | 0.3" | 4 1/2" | Seamless | 0000000 | 00000 |
| 4 | 0.337" | 6" | Seamless | 0000000 | 00000 |
| 6 | 0.432" | 9" | Seamless | 0000000 | 000000 |
Butt-Weld Fittings for Stainless Steel Tubing
- For Use With: See table
- Temperature Range: See table
- Tubing:
304 Stainless Steel: Use with 304/304L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except DIN EN 10357 fittings with only ASTM A269 or ASTM A270
316 Stainless Steel: Use with 316/316L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except ASME BPE and DIN EN 10357 fittings with only ASTM A269 or ASTM A270 - Specifications Met: See table
Weld these fittings to tubing for a permanent, flush connection that permits smooth flow through a line.
316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
316/316L Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Max. Pressure | Max. Vacuum | Temp. Range, °F | Lg. | Wall Thick. | For Use With | Specifications Met | Each | |
Polished | |||||||||
| 1 1/2" | 300 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 12" | 0.065" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 0000000 |
| 2" | 270 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 12" | 0.065" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 000000 |
| 2 1/2" | 220 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 18" | 0.065" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 000000 |
| 3" | 170 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 18" | 0.065" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 000000 |
| 4" | 120 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 18" | 0.083" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 000000 |
Dull | |||||||||
| 1 1/2" | 300 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 12" | 0.065" | Air, Food, Water | __ | 00000000 | 000000 |
| 2" | 270 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 12" | 0.065" | Air, Food, Water | __ | 00000000 | 000000 |
| 3" | 170 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 18" | 0.065" | Air, Food, Water | __ | 00000000 | 000000 |
| 4" | 120 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 18" | 0.083" | Air, Food, Water | __ | 00000000 | 000000 |
316/316L Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Max. Pressure | Max. Vacuum | Temp. Range, °F | Length (A) | Wall Thick. | For Use With | Specifications Met | Each | |
Polished | |||||||||
| 1 1/2" | 300 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 4 15/16" | 0.065" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 0000000 |
| 2" | 270 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 4 15/16" | 0.065" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 000000 |
| 3" | 170 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 7 7/16" | 0.065" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 000000 |
| 4" | 120 psi @ 72° F | 10 -6 torr @ 72° F | 35° to 250° | 7 7/16" | 0.083" | Dairy, Food | 3-A Certified 63-03 | 00000000 | 000000 |