Connect all your piping requirements with carbon steel nipples from Howell. Standard black and galvanized nipples come in pipe sizes from 1/8” to 8” and lengths from close to 12” long. Howell’s in-house pipe shop can manufacturer special non-standard pipe nipple lengths.
- ASTM A733 Standard Specification for Welded and Seamless Carbon Steel Pipe Nipples
- Material
- ASTM A53 / ASME SA53 Welded
- ASTM A106 / ASME SA53 Seamless
- ASTM A333 Gr 6 / ASME SA333 Gr 6 Seamless Low Temperature
- Finish in Black, Hot Dip Galvanized or Zinc Electroplated
- NPT threads conform to ASME B1.20.1
- End Connections
- NPT Threaded both ends is standard
- Plain End
- Grooved
- Special options like NPT Left Hand, NPSM Straight thread and BSPT British Taper are available
- Pipe schedules of S40, S80, S160, and XXH
- Tolerances
- Outside diameter for pipe size 1/8” to 1-1/2” – over/under 1/64”
- Outside diameter for pipe size 2” to 4” – over/under 1/32”
- Outside diameter for pipe size 5” to 8” – over/under 1/16”
- Standard nipple length – over/under 1/16”
- Non-standard nipple length and nipples longer than 12” - over/under 1/8”
- What is a “Close” or “Short / Shoulder” nipple?
- “Close" is the trade term meaning the shortest nipple length available. It allows for a tight connection between two female threaded connections since there is effectively no unthreaded area.
- “Short / Shoulder” is the trade term for the next nipple in length that is longer then the Close nipple. It will have a small unthreaded space between the two threads.
- Swage Nipples
- A swage nipple is a concentric or eccentric reducer with two different sized end connections.