{"operation":"document","citation":"HAR 6-77-99","title":"HAR 6-77-99 Wrinkle bends in steel pipe","source_type":"regulation","agency":"Hawaii Public Utilities Commission","status":"current","official":true,"published_on":"1994-04-15","effective_on":"1994-09-03","summary":"pipe to be operated at a pressure that produces a hoop stress of 30 percent, or more, of SMYS. (b) Each wrinkle bend on steel pipe must comply with the following: (1) The bend must not have any sharp kinks; (2) When measured along the crotch of the bend, the wrinkles must be a distance of at least o","machine_formats":{"json":"https://regulus.evalyn.ai/document/hi-har-har-6-77-99.json","markdown":"https://regulus.evalyn.ai/document/hi-har-har-6-77-99.md"},"app_url":"https://regulus.evalyn.ai/document/hi-har-har-6-77-99","source_url":"https://puc.hawaii.gov/wp-content/uploads/2026/04/HAR-6-77-Transp-of-Gas-03-31-2026.pdf","body":"pipe to be operated at a pressure that produces a hoop stress of 30 percent, or more, of SMYS. (b) Each wrinkle bend on steel pipe must comply with the following: (1) The bend must not have any sharp kinks; (2) When measured along the crotch of the bend, the wrinkles must be a distance of at least one pipe diameter; (3) On pipe sixteen inches or larger in diameter, the bend may not have a deflection of more than 1-1/2E for each wrinkle; and (4) On pipe containing a longitudinal weld the longitudinal seam must be as near as practicable to the neutral axis of the bend. [Eff ] (Auth: HRS '269-6) (Imp: 49 C.F.R. '192.315, October 1, 1990)","truncated":false,"body_characters":642}