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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 Stainless Steel Bleed Rings
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Flanges: Use Class 125 or 150 stainless steel
Create an access point in a pipe line where corrosion is a concern. Often used to relieve pressure or siphon and sample liquids, these bleed rings act as a port between two pipe flanges, eliminating the need to take apart your flanges to get inside. They include a plug, or replace the plug with your own fitting, valve, or probe. Made of stainless steel, these bleed rings resist rusting.
Install these bleed rings between two pipe flanges along with a gasket on both sides to avoid leaks. They’re designed to fit flanges that meet ASME B16.5.
304 stainless steel bleed rings keep corrosion at bay in wet conditions but will start to corrode when exposed to salt water. 316 stainless steel bleed rings withstand wet conditions as well as chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
Plug | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | OD | ID | Width | Wall Thickness | Maximum Pressure | Maximum Steam Pressure | Pipe Size | Thread Type | Each | |
304/304L Stainless Steel | ||||||||||
| 2 | 4" | 2.375" | 1.5" | 0.813" | 230 psi @ 72° F | 175 psi @ 300° F | 1/2 | NPT | 0000000 | 0000000 |
| 3 | 5 1/4" | 3.5" | 1.5" | 0.875" | 230 psi @ 72° F | 175 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 4 | 6 3/4" | 4.5" | 1.5" | 1.125" | 230 psi @ 72° F | 175 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 6 | 8 5/8" | 6.625" | 1.5" | 1" | 230 psi @ 72° F | 175 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
316/316L Stainless Steel | ||||||||||
| 2 | 4" | 2.375" | 1.5" | 0.813" | 230 psi @ 72° F | 175 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 3 | 5 1/4" | 3.5" | 1.5" | 0.875" | 230 psi @ 72° F | 175 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 4 | 6 3/4" | 4.5" | 1.5" | 1.125" | 230 psi @ 72° F | 175 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 6 | 8 5/8" | 6.625" | 1.5" | 1" | 230 psi @ 72° F | 175 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
High-Pressure Stainless Steel Bleed Rings
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: See table
- Flanges:
Pressure Class 300: Use Class 300 stainless steel
Pressure Class 600: Use Class 600 stainless steel
To relieve pressure, siphon liquid, or take samples in a pipe line where corrosion is a concern, these bleed rings act as a port between two pipe flanges. They have a threaded hole and plug to access the inside of your line instead of having to disassemble your flanges. Or remove the plug and attach your own fitting, valve, or probe. These bleed rings are stainless steel, so they resist rusting.
Install these bleed rings between two pipe flanges along with a gasket on both sides to avoid leaks. They’re designed to fit flanges that meet ASME B16.5.
304 stainless steel bleed rings keep corrosion at bay in wet conditions but will start to corrode when exposed to salt water. 316 stainless steel bleed rings withstand wet conditions as well as chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
Plug | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | OD | ID | Width | Wall Thickness | Maximum Pressure | Maximum Steam Pressure | Pipe Size | Thread Type | Each | |
304/304L Stainless Steel | ||||||||||
Pressure Class 300 | ||||||||||
| 4 | 7" | 4.5" | 1.5" | 1.25" | 600 psi @ 72° F | 450 psi @ 300° F | 1/2 | NPT | 0000000 | 0000000 |
| 6 | 9 3/4" | 6.625" | 1.5" | 1.563" | 600 psi @ 72° F | 450 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
Pressure Class 600 | ||||||||||
| 2 | 4 1/4" | 2.375" | 1.5" | 0.938" | 1,200 psi @ 72° F | 900 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 3 | 5 3/4" | 3.5" | 1.5" | 1.125" | 1,200 psi @ 72° F | 900 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
316/316L Stainless Steel | ||||||||||
Pressure Class 600 | ||||||||||
| 2 | 4 1/4" | 2.375" | 1.5" | 0.938" | 1,200 psi @ 72° F | 900 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 3 | 5 3/4" | 3.5" | 1.5" | 1.125" | 1,200 psi @ 72° F | 900 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
Low-Pressure Steel Bleed Rings
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Flanges: Use Class 125 or 150 steel
Access the inside of a pipe line to vent pressure, drain liquid, or take samples. These bleed rings act as a port where two pipe flanges meet, so you don’t have to disassemble your flanges to get inside. They include a plug, or you can attach your own fitting, valve, or probe. Made of black-coated steel, these bleed rings should be used in noncorrosive environments to prevent rusting.
Install these bleed rings between two pipe flanges along with a gasket on both sides to avoid leaks. They’re designed to fit flanges that meet ASME B16.5.
For technical drawings and 3-D models, click on a part number.
Plug | Black-Coated Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | OD | ID | Width | Wall Thickness | Maximum Pressure | Maximum Steam Pressure | Pipe Size | Thread Type | Each | |
| 2 | 4" | 2.375" | 1.5" | 0.813" | 285 psi @ 72° F | 230 psi @ 300° F | 1/2 | NPT | 0000000 | 0000000 |
| 3 | 5 1/4" | 3.5" | 1.5" | 0.875" | 285 psi @ 72° F | 230 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 4 | 6 3/4" | 4.5" | 1.5" | 1.125" | 285 psi @ 72° F | 230 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 6 | 8 5/8" | 6.625" | 1.5" | 1" | 285 psi @ 72° F | 230 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
High-Pressure Steel Bleed Rings
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: See table
- Flanges:
Pressure Class 300: Use Class 300 steel
Pressure Class 600: Use Class 600 steel
Tap into a pipe line to vent pressure, drain liquid, or take samples. These bleed rings act as a port where two pipe flanges meet, so you don’t have to disassemble your flanges to get inside. Remove the included plug for access or attach your own fitting, valve, or probe to the threaded hole. Made of black-coated steel, these bleed rings should be used in noncorrosive environments to prevent rusting.
Install these bleed rings between two pipe flanges along with a gasket on both sides to avoid leaks. They’re designed to fit flanges that meet ASME B16.5.
For technical drawings and 3-D models, click on a part number.
Plug | Black-Coated Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | OD | ID | Width | Wall Thickness | Maximum Pressure | Maximum Steam Pressure | Pipe Size | Thread Type | Each | |
Pressure Class 300 | ||||||||||
| 4 | 7" | 4.5" | 1.5" | 1.25" | 700 psi @ 72° F | 600 psi @ 300° F | 1/2 | NPT | 0000000 | 0000000 |
| 6 | 9 3/4" | 6.625" | 1.5" | 1.563" | 700 psi @ 72° F | 600 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
Pressure Class 600 | ||||||||||
| 2 | 4 1/4" | 2.375" | 1.5" | 0.938" | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |
| 3 | 5 3/4" | 3.5" | 1.5" | 1.125" | 1,400 psi @ 72° F | 1,300 psi @ 300° F | 1/2 | NPT | 0000000 | 000000 |