HAR 6-77-47
HAR 6-77-47 Components fabricated by welding
assemblies of standard pipe and fittings jointed by circumferential welds, the design pressure of each component fabricated by welding, whose strength cannot be determined, must be established in accordance with paragraph UG-101 of section VIII of the ASME Boiler and Pressure Vessel Code.#
(b)Each prefabricated unit that uses plate and longitudinal seams must be designated, constructed, and tested in accordance with the ASME Boiler and Pressure Vessel Code, except for the following:#
(1)Regularly manufactured butt-welding fittings;#
(2)Pipe that has been produced and tested under a specification listed in Appendix B;#
(3)Partial assemblies such as split rings or collars;#
(4)Prefabricated units that the manufacturer certifies have been tested to at least twice the maximum pressure to which they will be subjected under the anticipated operating conditions.#
(c)Orange-peel bull plugs and orange-peel swages may not be used on pipelines that are to operate at a hoop stress of twenty percent or more of the SMYS of the pipe.#
(d)Except for flat closures designed in accordance with section VIII of the SME Boiler and Pressure Code, flat closures and fish tails may not be used on pipe that either operates at 100 p.s.i.g., or more, or is more than three inches nominal diameter. [Eff ] (Auth: HRS '269-6) (Imp: 49#