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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Nuts for High-Pressure Nipples for Compressed Gas
Slide a high-pressure hose nipple for compressed gas into one of these nuts to connect a pipe to the inlet of a pressure regulator. They are also known as CGA (Compressed Gas Association) nuts and inlet nuts.
316 stainless steel nuts have excellent corrosion resistance.
Note: Nuts have a CGA, BS, or DIN number that corresponds to a specific type of gas. Choose a nut with the same number as your tank and other system components.
- Maximum Pressure: See table
- Maximum Temperature: 120° F, except DIN 477 No. 9: 250° F
Number | Thread Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
316 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|
| CGA 705 | 1.125"-14 | UNS | Right Hand | 3,000 psi @ 72° F | Ammonia | 000000000 | 000000 |
High-Pressure Nipples for Compressed Gas
Commonly used in high-pressure welding applications, these nipples connect your tank to the inlet of a pressure regulator. One side has a threaded pipe end and the other side is designed to sit inside a threaded nut (sold separately) so you can make a threaded connection.
316 stainless steel nipples have excellent corrosion resistance.
- Maximum Pressure: See table
- Maximum Temperature: 120° F
Regulator Connection | ||||||
|---|---|---|---|---|---|---|
| For Number (Max. Pressure) | Pipe Size | Thread Type | Lg. | For Use With | Each | |
316 Stainless Steel—Tighten With Wrench | ||||||
| CGA 705 (3,000 psi @ 72° F) | 1/4 | NPT | 2 1/2" | Ammonia | 000000000 | 000000 |
- Maximum Pressure: See table
- Maximum Temperature: 120° F
| Number | Gender | Thread Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
316 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| CGA 705 | Female | 1.125"-14 | UNS | Right Hand | 3,000 psi @ 72° F | Ammonia | 000000000 | 000000 |
Stainless Steel Tubing for Corrosive Gases
- Temperature Range: -340° to 800° F
- Bending Method: Tube Bender
- Compatible Tube Fittings: Compression
A thin layer of silicon on the interior provides a smooth surface and offers protection against corrosive gases.
Seamless tubing is smoother and stronger than welded tubing and can be flared without splitting. Welded tubing is more economical than seamless tubing; it has a smoothed weld bead on the inside to reduce particle buildup.
304 stainless steel has very good corrosion resistance.
316 stainless steel offers excellent corrosion resistance.
| OD | Wall Thick. | ID | Max. Pressure | Temper Rating | 1 ft. | 3 ft. | 6 ft. | |
Welded 304 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
For Use With Ammonia, Nitrogen Oxide, Sulphur Oxide | ||||||||
| 1/8" | 0.02" | 0.085" | 3,000 psi @ 72° F | Soft | 00000000 | |||
| 1/4" | 0.02" | 0.21" | 2,000 psi @ 72° F | Soft | 00000000 | |||
Seamless 316 Stainless Steel | ||||||||
For Use With Ammonia, Nitrogen Oxide, Sulphur Oxide | ||||||||
| 1/8" | 0.035" | 0.055" | 8,500 psi @ 72° F | Soft | 00000000 | |||
| 1/4" | 0.035" | 0.18" | 4,300 psi @ 72° F | Soft | 00000000 | |||
Miniature Stainless Steel Tubing for Corrosive Gases
- Temperature Range: -340° to 800° F
- Bending Method: Tube Bender
- Compatible Tube Fittings: Compression
A thin layer of silicon on the interior provides a smooth surface and offers protection against corrosive gases. Tubing has thin walls and is made to tight tolerances for use in precision applications. It is welded with a smoothed weld bead on the inside to reduce particle buildup. It also has very good corrosion resistance. To cut this tubing, you can use abrasive cutoff wheels and deburring tools (not included).
Manifolds for Supplied-Air Respirators for Plant Air Lines
Divert compressed air from a single line to two respirators. Often used in plants with limited air sources, these manifolds allow two workers to share the same line. Shaped like a briefcase, they’re easy to tote around your facility—use them up to 300 ft. from an air source. The case is polypropylene, so it’s durable enough to hold up to wear and tear.
Overall | Pressure Regulating Max., psi | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inlet Coupling Size | Outlet Coupling Size (No. of Outlets) | Max. Flow Rate, cfm | Max. Pressure, psi | Gauge Included | Wd. | Ht. | Max. Temp., °F | Regulating Accuracy, psi | Inlet | Outlet | Each | |
Aluminum Housing | ||||||||||||
Quick-Disconnect Male Inlet and Female Outlets | ||||||||||||
| 1/2 | 1/4 (2 Regulated) | 100 | 125 | Yes | 19" | 13" | 140° | ±0.1 | 150 | 125 | 0000000 | 0000000 |