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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.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Straight Reducers
- 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
Pipe Size | Wall Thick. | 304/304L Stainless Steel | 316/316L Stainless Steel | |||||
|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Construction | Each | Each | ||
| 3/4 | 1/2 | 0.113" | 0.109" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 1 | 1/2 | 0.133" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 | 3/4 | 0.133" | 0.113" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 1/4 | 3/4 | 0.14" | 0.113" | Welded | 000000000 | 00000 | 000000000 | 000000 |
| 1 1/4 | 1 | 0.14" | 0.133" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 1/2 | 1/2 | 0.145" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 1/2 | 1 | 0.145" | 0.133" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 1/2 | 1 1/4 | 0.145" | 0.14" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 | 3/4 | 0.154" | 0.113" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 | 1 | 0.154" | 0.133" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 | 1 1/2 | 0.154" | 0.145" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 1/2 | 1 | 0.203" | 0.133" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 2 1/2 | 1 1/2 | 0.203" | 0.145" | Welded | 000000000 | 00000 | 000000000 | 000000 |
| 3 | 1 | 0.216" | 0.133" | Welded | 000000000 | 00000 | 000000000 | 000000 |
| 3 | 1 1/4 | 0.216" | 0.14" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 3 | 1 1/2 | 0.216" | 0.145" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 3 | 2 | 0.216" | 0.154" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 4 | 1 1/2 | 0.237" | 0.145" | Welded | 000000000 | 00000 | 000000000 | 000000 |
| 4 | 2 | 0.237" | 0.154" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 4 | 3 | 0.237" | 0.216" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 6 | 4 | 0.28" | 0.237" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 8 | 4 | 0.322" | 0.237" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 8 | 6 | 0.322" | 0.28" | Welded | 000000000 | 000000 | 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.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Straight Reducers
- For Use With: Air, Natural Gas, Oil, Water
- Specifications Met: ASME B16.9, ASTM A403, MSS SP-43
- Pipe: Use Schedule 10 stainless steel
Pipe Size | Wall Thick. | 304/304L Stainless Steel | 316/316L Stainless Steel | |||||
|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Construction | Each | Each | ||
| 10 | 6 | 0.165" | 0.134" | Welded | 000000000 | 0000000 | 000000000 | 0000000 |
| 10 | 8 | 0.165" | 0.148" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 3/4 | 1/2 | 0.083" | 0.083" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 | 1/2 | 0.109" | 0.083" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 | 3/4 | 0.109" | 0.083" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 1/4 | 3/4 | 0.109" | 0.083" | Welded | 000000 | 00 | 000000000 | 00000 |
| 1 1/4 | 1 | 0.109" | 0.109" | Welded | 000000000 | 00000 | 000000 | 00 |
| 1 1/2 | 1 | 0.109" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 1 1/2 | 1 1/4 | 0.109" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 | 1/2 | 0.109" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 000000 |
| 2 | 3/4 | 0.109" | 0.083" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 | 1 | 0.109" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 | 1 1/4 | 0.109" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 | 1 1/2 | 0.109" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 1/2 | 1 | 0.12" | 0.109" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 2 1/2 | 1 1/2 | 0.12" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 2 1/2 | 2 | 0.12" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 3 | 1 1/4 | 0.12" | 0.109" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 3 | 2 | 0.12" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 4 | 1 1/2 | 0.12" | 0.109" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 4 | 3 | 0.12" | 0.12" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 6 | 2 | 0.134" | 0.109" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 6 | 4 | 0.134" | 0.12" | Welded | 000000000 | 00000 | 000000000 | 00000 |
| 8 | 4 | 0.148" | 0.12" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 8 | 6 | 0.148" | 0.134" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 12 | 6 | 0.18" | 0.134" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 12 | 8 | 0.18" | 0.148" | Welded | 000000000 | 000000 | 000000000 | 000000 |
| 12 | 10 | 0.18" | 0.165" | Welded | 000000000 | 000000 | 000000000 | 000000 |
Butt-Weld Fittings for Stainless Steel Tubing
- For Use With: See table
- Max. Temperature: 250° F, except hose fittings are unrated.
- 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.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Straight Reducers, Tube
1
2
304/304L Stainless Steel
| For Tube OD (A) | For Tube OD (B) | Max. Pressure | Max. Vacuum | Wall Thick. | For Use With | Specifications Met | Each | ||
Polished | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 1/2" | 1" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 000000 |
| 1 | 2" | 1 1/2" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 00000 |
| 1 | 2 1/2" | 1 1/2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 00000 |
| 1 | 2 1/2" | 2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 00000 |
| 1 | 3" | 1 1/2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 00000 |
| 1 | 3" | 2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 00000 |
| 1 | 3" | 2 1/2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 00000 |
| 1 | 4" | 3" | 250 psi @ 72° F | 10 -6 torr @ 72° F | 0.083" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 00000 |
| 1 | 6" | 4" | 125 psi @ 72° F | 10 -6 torr @ 72° F | 0.109" | Dairy, Food | 3-A Certified 63-04 | 00000000 | 000000 |
Dull | |||||||||
| 1 | 1 1/2" | 1" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 2" | 1" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 2" | 1 1/2" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 2 1/2" | 1 1/2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 2 1/2" | 2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 3" | 1 1/2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 3" | 2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 3" | 2 1/2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 4" | 3" | 250 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 | 6" | 4" | 120 psi @ 72° F | 10 -6 torr @ 72° F | 0.083" | Air, Food, Water | __ | 00000000 | 000000 |
316/316L Stainless Steel
| For Tube OD (A) | For Tube OD (B) | Max. Pressure | Max. Vacuum | Wall Thick. | For Use With | Specifications Met | Certification | Each | ||
Polished | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1" | 1/2" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 00000000 | 000000 |
| 1 | 1" | 3/4" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 00000000 | 00000 |
| 1 | 1 1/2" | 1" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 0000000 | 00000 |
| 1 | 2" | 1 1/2" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 0000000 | 00000 |
| 1 | 2 1/2" | 1 1/2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 0000000 | 00000 |
| 1 | 2 1/2" | 2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 0000000 | 00000 |
| 1 | 3" | 1 1/2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 0000000 | 00000 |
| 1 | 3" | 2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 0000000 | 00000 |
| 1 | 3" | 2 1/2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Dairy, Food | 3-A Certified 63-04 | __ | 0000000 | 00000 |
| 1 | 4" | 3" | 250 psi @ 72° F | 10 -6 torr @ 72° F | 0.083" | Dairy, Food | 3-A Certified 63-04 | __ | 0000000 | 00000 |
| 2 | 3/4" | 1/2" | 700 psi @ 72° F | __ | 0.065" | Air, Deionized Water, Pharmaceuticals, Water | ASME BPE | Material Certificate with Traceable Lot Number and Test Report | 0000000 | 000000 |
| 2 | 1" | 3/4" | 700 psi @ 72° F | __ | 0.065" | Air, Deionized Water, Pharmaceuticals, Water | ASME BPE | Material Certificate with Traceable Lot Number and Test Report | 0000000 | 000000 |
| 2 | 1 1/2" | 1" | 700 psi @ 72° F | __ | 0.065" | Air, Deionized Water, Pharmaceuticals, Water | ASME BPE | Material Certificate with Traceable Lot Number and Test Report | 0000000 | 000000 |
| 2 | 2" | 1 1/2" | 700 psi @ 72° F | __ | 0.065" | Air, Deionized Water, Pharmaceuticals, Water | ASME BPE | Material Certificate with Traceable Lot Number and Test Report | 0000000 | 000000 |
Dull | ||||||||||
| 1 | 1" | 1/2" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 1" | 3/4" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 1 1/2" | 1" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 2" | 1" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 2" | 1 1/2" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 2 1/2" | 2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 3" | 1 1/2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 3" | 2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 3" | 2 1/2" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 4" | 3" | 250 psi @ 72° F | 10 -6 torr @ 72° F | 0.083" | Air, Food, Water | __ | __ | 00000000 | 00000 |
| 1 | 6" | 4" | 120 psi @ 72° F | 10 -6 torr @ 72° F | 0.109" | Air, Food, Water | __ | __ | 00000000 | 000000 |