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 Stainless Steel Unthreaded Pipe Flanges
Bolt two flat-surface flanges or two raised-surface flanges of the same size together with a
Socket-connect flanges have an internal stop that supports the pipe when welding and prevents the pipe from sliding all the way through. Forged flanges have better strength than cast flanges. 304 stainless steel flanges offer very good corrosion resistance, and 316 stainless steel flanges have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/446/44695k182c1-c01d-digital-master1571347930-p9@halfx_637069516347348658.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/446/44685k192p2-c01d-digitall@halfx_637069798046634019.png?ver=imagenotfound)
- For Use With: Air, Water, Oil, Natural Gas
- Pressure Class: 150
- Specifications Met
4-8 pipe size: ASTM 182
All other pipe sizes: ASME B16.5, ASTM A182 - Certification: Material Certificate with Traceable Lot Number and Test Report
- Fittings: Use schedule 40 stainless steel
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Bolt Hole | 304/304L Stainless Steel | 316/316L Stainless Steel | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | Each | ||
1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 230 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 230 psi @ 72° F | 000000000 | 00000 | 000000000 | 00000 |
1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 230 psi @ 72° F | 000000000 | 00000 | 000000000 | 00000 |
1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 230 psi @ 72° F | 000000000 | 00000 | 000000000 | 00000 |
1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 230 psi @ 72° F | 000000000 | 00000 | 000000000 | 00000 |
2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 230 psi @ 72° F | 000000000 | 00000 | 000000000 | 000000 |
2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 230 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 230 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 230 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 230 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 230 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
High-Pressure Stainless Steel Unthreaded Pipe Flanges
Use these heavy duty forged flanges for high-pressure applications. Bolt two flat-surface flanges or two raised-surface flanges of same size together with a gasket (sold separately) to create an access point in a pipe line.
304 stainless steel flanges offer very good corrosion resistance. 316 stainless steel flanges have excellent corrosion resistance.
Socket-connect flanges have an internal stop that supports the pipe when welding and prevents the pipe from sliding all the way through.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/444/4448t266c1-c01d-digital-master1571347923-p9@halfx_637069303870156132.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/444/4448t268p2-c01d-digitall@halfx_637069816144658092.png?ver=imagenotfound)
- For Use With:
4 and 6 Pipe Sizes: Air, Hydraulic Fluid, Natural Gas, Oil, Water
All other sizes: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water - Pressure Class: See table
- Specifications Met: See table
- Certification:: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Fittings: Use Schedule 40 stainless steel
Bolt Hole | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Specifications Met | Each | |
304/304L Stainless Steel | |||||||||||
Pressure Class 300 | |||||||||||
1/2 | 08 | 600 psi @ 72° F | 300 psi @ 360° F | 3 3/4" | 1/2" | 0.625" | 4 | 2 5/8" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
3/4 | 12 | 600 psi @ 72° F | 300 psi @ 360° F | 4 5/8" | 5/8" | 0.75" | 4 | 3 1/4" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 00000 |
1 | 16 | 600 psi @ 72° F | 300 psi @ 360° F | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 00000 |
1 1/4 | 20 | 600 psi @ 72° F | 300 psi @ 360° F | 5 1/4" | 5/8" | 0.75" | 4 | 3 7/8" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
1 1/2 | 24 | 600 psi @ 72° F | 300 psi @ 360° F | 6 1/8" | 3/4" | 0.875" | 4 | 4 1/2" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
2 | 32 | 600 psi @ 72° F | 300 psi @ 360° F | 6 1/2" | 5/8" | 0.75" | 8 | 5" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
2 1/2 | 40 | 600 psi @ 72° F | 300 psi @ 360° F | 7 1/2" | 3/4" | 0.875" | 8 | 5 7/8" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
3 | 48 | 600 psi @ 72° F | 300 psi @ 360° F | 8 1/4" | 3/4" | 0.875" | 8 | 6 5/8" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
4 | 64 | 600 psi @ 72° F | 300 psi @ 360° F | 10" | 3/4" | 0.875" | 8 | 7 7/8" | ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
6 | 96 | 600 psi @ 72° F | 300 psi @ 360° F | 12 1/2" | 3/4" | 0.875" | 12 | 10 5/8" | ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
Pressure Class 600 | |||||||||||
1 | 16 | 1,200 psi @ 72° F | 840 psi @ 400° F | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
1 1/2 | 24 | 1,200 psi @ 72° F | 840 psi @ 400° F | 6 1/8" | 3/4" | 0.875" | 4 | 4 1/2" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
2 | 32 | 1,200 psi @ 72° F | 840 psi @ 400° F | 6 1/2" | 5/8" | 0.75" | 8 | 5" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
3 | 48 | 1,200 psi @ 72° F | 840 psi @ 400° F | 8 1/4" | 3/4" | 0.88" | 8 | 6 5/8" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
316/316L Stainless Steel | |||||||||||
Pressure Class 300 | |||||||||||
1/2 | 08 | 600 psi @ 72° F | 300 psi @ 360° F | 3 3/4" | 1/2" | 0.625" | 4 | 2 5/8" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 00000 |
3/4 | 12 | 600 psi @ 72° F | 300 psi @ 360° F | 4 5/8" | 5/8" | 0.75" | 4 | 3 1/4" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 00000 |
1 | 16 | 600 psi @ 72° F | 300 psi @ 360° F | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
1 1/4 | 20 | 600 psi @ 72° F | 300 psi @ 360° F | 5 1/4" | 5/8" | 0.75" | 4 | 3 7/8" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
1 1/2 | 24 | 600 psi @ 72° F | 300 psi @ 360° F | 6 1/8" | 3/4" | 0.875" | 4 | 4 1/2" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
2 | 32 | 600 psi @ 72° F | 300 psi @ 360° F | 6 1/2" | 5/8" | 0.75" | 8 | 5" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
3 | 48 | 600 psi @ 72° F | 300 psi @ 360° F | 8 1/4" | 3/4" | 0.875" | 8 | 6 5/8" | ASME B16.5, ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
4 | 64 | 600 psi @ 72° F | 300 psi @ 360° F | 10" | 3/4" | 0.875" | 8 | 7 7/8" | ASTM A182, MSS SP-25, MSS SP-6 | 00000000 | 000000 |
Pressure Class 600 | |||||||||||
1/2 | 08 | 1,200 psi @ 72° F | 840 psi @ 400° F | 3 3/4" | 1/2" | 0.62" | 4 | 2 5/8" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
3/4 | 12 | 1,200 psi @ 72° F | 840 psi @ 400° F | 4 5/8" | 5/8" | 0.75" | 4 | 3 1/4" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
1 | 16 | 1,200 psi @ 72° F | 840 psi @ 400° F | 4 7/8" | 5/8" | 0.75" | 4 | 3 1/2" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
1 1/2 | 24 | 1,200 psi @ 72° F | 840 psi @ 400° F | 6 1/8" | 3/4" | 0.875" | 4 | 4 1/2" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
2 | 32 | 1,200 psi @ 72° F | 840 psi @ 400° F | 6 1/2" | 5/8" | 0.75" | 8 | 5" | ASME B16.5, ASTM A182 | 0000000 | 000000 |
High-Pressure Stainless Steel Unthreaded SAE Pipe Flanges
Create an access point in a high-pressure hydraulic fluid line with these flanges. They are also known as Code 61 SAE hydraulic flanges. To connect, bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size. Flanges are 316 stainless steel for excellent corrosion resistance.
Socket-connect flanges weld to pipe for a strong, permanent connection.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/143/1431n012-@halfx_637079372394044945.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/143/1431n012p2-c01d-digitall@halfx_637069799284500784.png?ver=imagenotfound)
- For Use With: Hydraulic Fluid
- Specifications Met: SAE J518, ISO 6162
Flange | Bolt Hole | 316/316L Stainless Steel | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | SAE Flange Size | Dash Size | Max. Pressure | Ht. | Wd. | Dp. | Mounting Hardware Included | For Bolt Dia. | Dia. | No. of | Ctr.-to-Ctr. | Each | |
3/4 | 3/4 | 12 | 5,000 psi @ 72° F | 2 5/8" | 1 3/4" | 15/16" | No | 3/8" | 0.406" | 4 | 7/8", 1 7/8" | 0000000 | 0000000 |
1 | 1 | 16 | 5,000 psi @ 72° F | 2 53/64" | 2" | 15/16" | No | 3/8" | 0.406" | 4 | 1.031", 2.062" | 00000000 | 000000 |
1 1/2 | 1 1/2 | 24 | 3,000 psi @ 72° F | 3 3/4" | 2 3/4" | 1 3/16" | No | 1/2" | 0.531" | 4 | 1.406", 2 3/4" | 00000000 | 000000 |
2 | 2 | 32 | 3,000 psi @ 72° F | 4" | 3 1/4" | 1 7/16" | No | 1/2" | 0.531" | 4 | 1.688", 3.062" | 00000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/143/1431n012p1-c01d-digitall@halfx_637069796691654997.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/143/1431n016p2-c01d-digitall@halfx_637069798985690610.png?ver=imagenotfound)
- For Use With: Hydraulic Fluid
- Specifications Met: SAE J518, ISO 6162
Flange | Bolt Hole | 316/316L Stainless Steel | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | SAE Flange Size | Dash Size | Max. Pressure | Ht. | Wd. | Dp. | Mounting Hardware Included | For Bolt Dia. | Dia. | No. of | Ctr.-to-Ctr. | Each | |
3/4 | 3/4 | 12 | 5,000 psi @ 72° F | 2 5/8" | 1 3/4" | 15/16" | Yes | 3/8" | 0.406" | 4 | 7/8", 1 7/8" | 00000000 | 0000000 |
1 | 1 | 16 | 5,000 psi @ 72° F | 2 53/64" | 2" | 15/16" | Yes | 3/8" | 0.406" | 4 | 1.031", 2.062" | 00000000 | 000000 |
1 1/2 | 1 1/2 | 24 | 3,000 psi @ 72° F | 3 3/4" | 2 3/4" | 1 3/16" | Yes | 1/2" | 0.531" | 4 | 1.406", 2 3/4" | 00000000 | 000000 |
2 | 2 | 32 | 3,000 psi @ 72° F | 4" | 3 1/4" | 1 7/16" | Yes | 1/2" | 0.531" | 4 | 1.688", 3.062" | 00000000 | 000000 |