HAR 6-77-78 Miter joints

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)#