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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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Low-Pressure Steel Unthreaded Pipe Flanges
Bolt two flat-surface flanges or two raised-surface flanges of the same size together with a gasket (sold separately) to create an access point in a pipe line. Flanges are for use with low-pressure applications in noncorrosive environments.
Slip-on weld flanges have no internal stop. Slide a pipe through the flange and weld on both sides.
Inch Slip-On Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: See table
- Specifications Met: See table
- Certification: See table
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: See Table
Bolt Hole | For Fitting | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Schedule | Material | Specifications Met | Each | |
| 2 | 6 7/64" | 5/8" | 0.748" | 4 | 4 23/32" | Not Rated | Not Rated | 40 | Iron, Steel | ASTM A105, JIS B 2220 | 0000000 | 000000 |