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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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About Hose
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Precision Extreme-Pressure Brass Threaded Pipe Nipples and Pipe
- For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3
This pipe has the most precise threads and the tightest tolerances of all the brass pipe we offer. It has rolled threads for excellent strength in extreme-pressure applications. Pipe is brass for good corrosion resistance. Also known as a close nipple, it is threaded on each end to the center.
For technical drawings and 3-D models, click on a part number.
| Pipe Size  | Lg. | Thread Type | Max. Pressure | Max. Steam Pressure | Each | |
| 1/8 | 3/4" | NPT | 5,600 psi @ 72° F | 1,500 psi @ 300° F | 00000000 | 00000 |
| 1/4 | 1 1/8" | NPT | 4,100 psi @ 72° F | 1,500 psi @ 300° F | 00000000 | 0000 |
| 3/8 | 1 1/8" | NPT | 4,000 psi @ 72° F | 1,500 psi @ 300° F | 00000000 | 00000 |
| 1/2 | 1 1/2" | NPT | 3,900 psi @ 72° F | 1,500 psi @ 300° F | 00000000 | 00000 |
| 3/4 | 1 1/2" | NPT | 3,800 psi @ 72° F | 1,500 psi @ 300° F | 00000000 | 00000 |
High-Temperature Argon, Nitrogen, and Oxygen Hose
- Temperature Range: -320° to 1,500° F
- Maximum Vacuum: 29" of Hg @ 72° F
- Material: 316 Stainless Steel with 304 Stainless Steel Cover
Transfer industrial gases in temperatures up to 1500° F. The braided reinforcement provides good flexibility in high-vibration applications. A cover surrounds the braid to protect it from damage. Hose comes cleaned, capped, and bagged to meet CGA (Compressed Gas Association) G4.1. It should not be used underground.
Argon, Nitrogen, and Oxygen Hose with Female Threaded Fittings
- Temperature Range: -65° to 450° F
- Maximum Vacuum: 28" of Hg @ 72° F
- Material: PTFE with 304 Stainless Steel Cover
This hose is often called pigtail hose. It comes cleaned, capped, and bagged to meet CGA (Compressed Gas Association) G4.1. Hose should not be used underground.
Argon, Nitrogen, and Oxygen Hose with Male and Female Threaded Fittings
- Temperature Range: -65° to 450° F
- Maximum Vacuum: 28" of Hg @ 72° F
- Material: PTFE with 304 Stainless Steel Cover
This hose is often called pigtail hose. It comes cleaned, capped, and bagged to meet CGA (Compressed Gas Association) G4.1. Hose should not be used underground.
Welding Gas Hose
- Temperature Range: -40° to 180° F
- Material:
Grade R Hose: EPDM Rubber
Grade T Hose: Blended Rubber - Color: Green, Red, or Green/Red
- Compatible Hose Fittings: Barbed
Made of EPDM rubber, this hose is abrasion, weather, and ozone resistant.
Grade R Hose—Green hose is for oxygen; red hose is for acetylene.
Grade T Hose—It's also oil and flame resistant. Green hose is for oxygen; red hose is for acetylene, hydrogen, MAPP, natural gas, propane, or propylene.
Welding Gas Hose with Fittings
- Temperature Range: -40° to 180° F
- Material:
Grade R Hose: EPDM Rubber
Grade T Hose: Blended Rubber - Color: Green, Red, or Green/Red
Hose is abrasion, weather, and ozone resistant.
Grade R Hose—Green hose is for oxygen and has right-hand threads on the fittings; red hose is for acetylene and has left-hand threads on the fittings.
Grade T Hose—It's also oil and flame resistant. Green hose is for oxygen and has right-hand threads on the fittings; red hose is for acetylene, hydrogen, MAPP, natural gas, propane, or propylene and has left-hand threads on the fittings.
| Grade | Number of Lines | Color | ID | OD | Thread Size | 12 1/2 ft. | 25 ft. | 50 ft. | 100 ft. | |
Brass Threaded UNF Female × Brass Threaded UNF Female | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
200 psi @ 72° F Max. Pressure | ||||||||||
| R | 1 | Green | 3/16" | 7/16" | 9/16"-18 × 9/16"-18 | 000000 | ||||
| R | 1 | Green | 1/4" | 9/16" | 9/16"-18 × 9/16"-18 | 000000 | ||||
| R | 2 | Green/Red | 3/16" | 7/16" | 9/16"-18 × 9/16"-18 | 000000 | ||||
| R | 2 | Green/Red | 1/4" | 9/16" | 9/16"-18 × 9/16"-18 | 000000 | ||||
| T | 2 | Green/Red | 1/4" | 9/16" | 9/16"-18 × 9/16"-18 | 000000 | ||||