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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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Standard-Wall Stainless Steel
Unthreaded Pipe Nipples and Pipe
Also known as Schedule 40, this pipe has a thicker wall than our thin-wall stainless steel unthreaded pipe. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak.
304 stainless steel pipe has very good corrosion resistance. 316 stainless steel pipe has excellent corrosion resistance.
Seamless pipe has a smooth interior for unrestricted flow and is stronger than welded pipe. Welded pipe has a weld bead on the inside.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Water
- Specifications Met:
Pipe 10" and shorter: ASTM 312
Pipe 1 ft. and longer: ANSI/ ASME B36.19, ASTM 312 - Fittings: Use Class 150 or Schedule 40 stainless steel
- Flanges: Use Schedule 40 stainless steel
304/304L Stainless Steel | 316/316L Stainless Steel | ||||
|---|---|---|---|---|---|
| Lg. | Wall Thick. | Each | Each | ||
2 Pipe Size | |||||
| 2" | 0.154" | 0000000 | 000000 | 000000 | 00 |
| 2 1/2" | 0.154" | 0000000 | 00000 | 000000 | 00 |
| 3" | 0.154" | 0000000 | 00000 | 000000 | 00 |
| 4" | 0.154" | 0000000 | 00000 | 000000 | 00 |
| 6" | 0.154" | 0000000 | 00000 | 000000 | 00 |
| 1ft. | 0.154" | 000000000 | 00000 | 000000000 | 000000 |
| 3ft. | 0.154" | 000000000 | 000000 | 000000000 | 000000 |
| 6ft. | 0.154" | 000000000 | 000000 | 000000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Water
- Specifications Met: ASTM A312
- Fittings: Use Class 150 or Schedule 40 stainless steel
- Flanges: Use Schedule 40 stainless steel
Thin-Wall Stainless Steel Unthreaded Pipe
- For Use With: Air, Natural Gas, Oil, Water
- Specifications Met: ASTM A312, ANSI/ASME B36.19
- Fittings: Use unthreaded Schedule 10 stainless steel
Also known as Schedule 10, this pipe is thin and lightweight. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe has a welded construction, so there is a weld bead on the inside.
304 stainless steel pipe has very good corrosion resistance. 316 stainless steel pipe has excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Thick-Wall Stainless Steel Unthreaded Pipe
- For Use With: Air, Water, Hydraulic Fluid, Natural Gas, Steam, Oil
- Specifications Met: ASTM A312
- Fittings: Use Class 3000 or Schedule 80 stainless steel
- Flanges: Use Class 300 or 600 stainless steel
Also known as Schedule 80, this pipe provides an extra-strong connection. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless with a smooth interior for unrestricted flow.
304 stainless steel pipe has very good corrosion resistance. 316 stainless steel pipe has excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Extra-Thick-Wall Stainless Steel Unthreaded Pipe
- For Use With: Air, Water, Hydraulic Fluid, Natural Gas, Steam, Oil
- Specifications Met: ASTM A312
- Fittings: Use Class 6000 or Schedule 160 stainless steel
With an extra-thick wall, this Schedule 160 pipe is the strongest stainless steel pipe we offer. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless, which provides a smooth interior for unrestricted flow.
304 stainless steel pipe has very good corrosion resistance. 316 stainless steel pipe has excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Standard-Wall Steel Unthreaded Pipe Nipples and Pipe
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met:
1"-8" lengths: ASTM A733
1 ft.-5 ft. lengths: ASTM A53, ASTM A733 - Fittings: Use Schedule 40 iron and steel
- Flanges: Use Class 150 steel
Weld this unthreaded pipe to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is also known as Schedule 40. It has welded construction, so there is a weld bead on the inside. Use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
Thick-Wall Steel Unthreaded Pipe
- For Use With:
Steel: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
P22 Chrome-Moly Steel: Air, Natural Gas, Oil, Steam, Water - Specifications Met: See table
- Fittings:
Steel: Use Class 3000 or Schedule 30 steel
P22 Chrome-Moly Steel: Use Class 3000 F22 Chrome-Moly Steel - Flanges: See table
Thick, Schedule 80 walls give this pipe better strength than our standard-wall steel unthreaded pipe. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless, so it has a smooth interior for unrestricted flow. It is for use in noncorrosive environments.
P22 chrome-moly steel is stronger and easier to weld than plain steel. It resists scaling even in steam applications.
For technical drawings and 3-D models, click on a part number.
For Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg., ft. | Dash Size | Wall Thick. | Construction | Material | Class | Material | Specifications Met | Each | |
1/8 Pipe Size | |||||||||
| 6 | 02 | 0.095" | Seamless | Steel | 300, 600 | Steel | ASTM A106, ASTM A53, ASTM A733 | 0000000 | 0000000 |
1/2 Pipe Size | |||||||||
| 1 | __ | 0.147" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 00000 |
| 3 | __ | 0.147" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 000000 |
3/4 Pipe Size | |||||||||
| 1 | __ | 0.154" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 00000 |
| 3 | __ | 0.154" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 000000 |
1 Pipe Size | |||||||||
| 1 | __ | 0.179" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 00000 |
| 3 | __ | 0.179" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 000000 |
1 1/2 Pipe Size | |||||||||
| 1 | __ | 0.2" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 00000 |
| 3 | __ | 0.2" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 000000 |
2 Pipe Size | |||||||||
| 1 | 32 | 0.218" | Seamless | Steel | 300, 600 | Steel | ASTM A106, ASTM A53, ASTM A733 | 00000000 | 00000 |
| 1 | __ | 0.218" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 000000 |
| 3 | 32 | 0.218" | Seamless | Steel | 300, 600 | Steel | ASTM A106, ASTM A53, ASTM A733 | 00000000 | 000000 |
| 3 | __ | 0.218" | Seamless | P22 Chrome-Moly Steel | __ | __ | __ | 0000000 | 000000 |
| 6 | 32 | 0.218" | Seamless | Steel | 300, 600 | Steel | ASTM A106, ASTM A53, ASTM A733 | 0000000 | 000000 |
Thin-Wall Aluminum Unthreaded Pipe
- For Use With: Air, Oil, Water
- Fittings: Use Schedule 10 aluminum
Also known as Schedule 10, this pipe has the thinnest walls of all our aluminum pipe. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless, which provides a smooth interior for unrestricted flow. It is lightweight with good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Thick-Wall Aluminum Unthreaded Pipe
- For Use With: Air, Oil, Water
- Specifications Met: ASTM B241
- Fittings: Use Schedule 80 aluminum
The strongest aluminum pipe we offer, this pipe is also known as Schedule 80. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless so it has a smooth interior for unrestricted flow. It is aluminum, which is lightweight with good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Standard-Wall Aluminum Unthreaded Pipe
- For Use With: Air, Oil, Water
- Specifications Met: ASTM B241
- Fittings: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
With a thicker wall than our thin-wall aluminum pipe, this pipe is also known as Schedule 40. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is aluminum, which is lightweight with good corrosion resistance.
Seamless pipe has a smooth interior for unrestricted flow and is stronger than welded pipe.
For technical drawings and 3-D models, click on a part number.
Standard-Wall Brass Unthreaded Pipe
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM B43
With two unthreaded ends, this pipe is designed for brazed connections, which are stronger than threaded connections and less likely to leak. It is also known as Schedule 40. Pipe is seamless, so it has a smooth interior for unrestricted flow. It is brass, which has good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Copper-Nickel Unthreaded Pipe
- For Use With: Air, Natural Gas, Oil, Water, Salt Water
- Class: 200
- Specifications Met: MIL-T-16420K, NAVSEA
- Fittings: Use Class 200 copper-nickel
Designed for salt water applications, this pipe is made of copper-nickel, which has excellent resistance to stress cracking and better corrosion resistance than most stainless steel alloys. Pipe is also known as Class 200 pipe. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless, which provides a smooth interior for unrestricted flow.
For technical drawings and 3-D models, click on a part number.