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.
More
FM-Approved Low-Pressure Cast Iron Threaded Pipe Flanges
Suitable for use in fire-protection applications, these flanges are brittle and can be quickly opened with the strike of a sledge hammer. Bolt two flanges of the same size together with a gasket (sold separately) to create an access point within a line. Use in noncorrosive environments.
Reducing flanges transition your system to a smaller pipe size. Attach them to a flange with a larger pipe size but with the same flange dimensions.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met:
3/4 Pipe Size: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved
All other sizes: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved, UL Listed - Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Class 125 iron and steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT | ||||||||||
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 5 | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B16.1, ASTM A126, ASTM A153, FM Approved
- Pipe Nipples and Pipe: Use Schedule 40 iron and steel
- Fittings: Use Class 125 iron and steel
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | For Flange Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT | |||||||||||
| 2 | 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 2 | 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 2 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 3 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 4 | 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
FM-Approved Low-Pressure Cast Iron Unthreaded Pipe Flanges
- For Use With: Air, Diesel Fuel, Gasoline, Natural Gas, Oil, Steam, Water
- Pressure Class: 125
- Specifications Met: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Class 125 or 150 iron and steel
FM-approved for fire protection applications, these flanges are cast iron, so they're brittle and can be quickly opened by hitting them with a sledge hammer. Bolt them together with a gasket (not included) to create an access point within a low-pressure pipe line. All are cap flanges, which are also known as blind flanges. Use them in noncorrosive environments.
Bolt Hole | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Each | |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
| 3 1/2 | 8 1/2" | 5/8" | 3/4" | 8 | 7" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
FM-Approved Iron Pipe Fittings with Flanged Ends
FM approved, these fittings are suitable for use in fire-protection systems. All have flat-surface flanged ends that only mate to another same-size flat-surface flange, pump, or valve with a gasket (sold separately) to create an access point in a pipeline. Use them in noncorrosive areas.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: FM Approved, UL Listed, ASTM A126, ASTM B307, Fed. Spec. WW-F-406, ASME B16.1, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 steel
Pipe Size | Flange OD | Bolt Hole | Bolt Circle Dia. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | For Bolt Dia. | Dia. | No. of | (A) | (B) | Max. Pressure | Max. Steam Pressure | Material | Each | |
| 2 1/2 | 2 | 7" | 6" | 5/8" | 3/4" | 4 | 5 1/2" | 4 3/4" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 0000000 |
| 3 | 2 | 7 1/2" | 6" | 5/8" | 3/4" | 4 | 6" | 4 3/4" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
| 3 | 2 1/2 | 7 1/2" | 7" | 5/8" | 3/4" | 4 | 6" | 5 1/2" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
| 4 | 3 | 9" | 7 1/2" | 5/8" | 3/4" | 8 | 7 1/2" | 6" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
Press-Connect Fittings for Copper Tubing
- For Use With: Drinking Water
- Maximum Pressure: Fittings compatible with Viega ProPress or Viega ProPress XL-C: 200 psi @ 72° F
Fittings compatible with Viega Pex or Viega PureFlow Press: 100 psi @ 72° F - Temperature Range: 0° to 250° F
- Tubing: Fittings compatible with Viega ProPress or Viega ProPress XL-C: Use with K, M, L copper
Fittings compatible with Viega Pex or Viega PureFlow Press: Use with hard polyethylene plastic - Specifications Met: See table
Crimp these fittings to copper tubing with a crimping tool (sold separately). An O-ring on the inside of the fitting creates a leak-tight connection that doesn’t require heat or soldering. They are comparable to Viega ProPress fittings. Fittings have good corrosion resistance. They meet NSF/ANSI safety standards for use with drinking water systems.
Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.
Straight adapters with flanged end bolt to equipment or other flanged connections found on pumps and valves to create a convenient access point.
Bolt Hole | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Copper Tube Size | For Tube OD | Pipe Size | Flange OD | Bolt Circle Dia. | Dia. | No. of | For Bolt Dia. | Bolts Included | Lg. | Material | Flange Material | Compatible With | Specifications Met | Each | |
| 1 | 1 1/8" | 1 | 4 21/64" | 3 7/64" | 5/8" | 4 | 1/2" | No | 2 49/64" | Bronze | Powder-Coated Steel | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 0000000 |
| 1 1/4 | 1 3/8" | 1 1/4 | 4 17/32" | 3 1/2" | 5/8" | 4 | 1/2" | No | 2 49/64" | Bronze | Powder-Coated Steel | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 1 1/2 | 1 5/8" | 1 1/2 | 4 59/64" | 3 55/64" | 5/8" | 4 | 1/2" | No | 3 1/16" | Bronze | Powder-Coated Steel | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 2 | 2 1/8" | 2 | 5 29/32" | 4 49/64" | 3/4" | 4 | 5/8" | No | 3 21/32" | Bronze | Powder-Coated Steel | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 2 1/2 | 2 5/8" | 2 1/2 | 7 3/32" | 5 33/64" | 3/4" | 4 | 5/8" | No | 2 51/64" | Copper | Powder-Coated Steel | Viega ProPress XL-C | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 3 | 3 1/8" | 3 | 7 31/64" | 5 63/64" | 3/4" | 4 | 5/8" | No | 3 11/64" | Copper | Powder-Coated Steel | Viega ProPress XL-C | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 4 | 4 1/8" | 4 | 9 1/16" | 7 33/64" | 3/4" | 8 | 5/8" | No | 3 21/32" | Copper | Powder-Coated Steel | Viega ProPress XL-C | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
Jaws for copper tube sizes ½ to 2 fit directly into the included crimping tool.
Battery | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Copper Tube Size | For Tube OD | Voltage | No. Included | Cap., amp-hrs. | Battery Charger Included | Battery Charging Time, min. | Compatible With | Specifications Met | Each | |
| 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | 5/8", 7/8", 1 1/8", 1 3/8", 1 5/8", 2 1/8" | 18V DC | 2 | 3 | Yes | 39 | Viega ProPress | EMC 2011/65/EU, EMC 2014/30/EU, IEC 62841-1, UL 62841-1 | 00000000 | 000000000 |
Rings for copper tube sizes 2 ½ to 4 include a jaw actuator. Clip the rings around the fitting and use the jaw actuator and crimping tool (sold separately) to press the open ends together.
| For Copper Tube Size | For Tube OD | Includes | Compatible With | Each | |
| 2 1/2, 3, 4 | 2 5/8", 3 1/8", 4 1/8" | Three Rings (2 1/2-4 Copper Tube Size) One Ring Actuator Jaw | Viega ProPress XL-C | 00000000 | 000000000 |