# HAR 6-77-78 Miter joints

- **operation:** document
- **citation:** HAR 6-77-78
- **title:** HAR 6-77-78 Miter joints
- **source type:** regulation
- **agency:** Hawaii Public Utilities Commission
- **status:** current
- **official:** true
- **published on:** 1994-04-15
- **effective on:** 1994-09-03
- **summary:** produced a hoop stress of thirty percent or more of SMYS may not deflect the pipe more than 3E. (b) A miter joint on steel pipe to be operated at a pressure that produces a hoop stress of less than thirty percent, but more than ten percent, of SMYS may not deflect the pipe more than 12-1/2E and must
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- **markdown:** https://regulus.evalyn.ai/document/hi-har-har-6-77-78.md
- **app url:** https://regulus.evalyn.ai/document/hi-har-har-6-77-78
- **source url:** https://puc.hawaii.gov/wp-content/uploads/2026/04/HAR-6-77-Transp-of-Gas-03-31-2026.pdf
**body:**

produced a hoop stress of thirty percent or more of SMYS may not deflect the pipe more than 3E. (b) A miter joint on steel pipe to be operated at a pressure that produces a hoop stress of less than thirty percent, but more than ten percent, of SMYS may not deflect the pipe more than 12-1/2E and must be a distance equal to one pipe diameter or more away from any other miter joint, as measured from the crotch of each joint. (c) A miter joint on steel pipe to be operated at a pressure that produces a hoop stress of ten percent or less of SMYS may not deflect the pipe more than 90E. [Eff ] (Auth: HRS '269-6) (Imp: 49 C.F.R. '192.233, October 1, 1990)
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- **body characters:** 654