Haw. Code R. § 6-77-44 - Flanges and flange accessories
(a) Each flange or
flange accessory (other than cast iron) must meet the minimum requirements of
ANSI B16.5 MSS SP-44, or the equivalent.
(b) Each flange assembly must be able to
withstand the maximum pressure at which the pipeline is to be operated and to
maintain its physical and chemical properties at any temperature to which it is
anticipated that it might be subjected in service.
(c) Each flange on a flanged joint in cast
iron pipe must conform in dimensions, drilling, face and gasket design to ANSI
B16.1 and be cast integrally with the pipe, valve, or fitting.
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