Hawaii Administrative Rules
Title 6 - DEPARTMENT OF BUDGET AND FINANCE
Division - PUBLIC UTILITIES COMMISSION
Chapter 77 - TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE; MINIMUM SAFETY STANDARDS
Subchapter 6 - MINIMUM SAFETY STANDARDS - DESIGN OF PIPELINE COMPONENTS
Section 6-77-43 - Valves
Universal Citation: HI Admin Rules 6-77-43
Current through August, 2024
(a) Except for cast iron and plastic valves, each valve must meet the minimum requirements, or equivalent of API 6D. A valve may not be used under operating conditions that exceed the applicable pressure-temperature ratings contained in those requirements.
(b) Each cast iron and plastic valve must comply with the following:
(1) The valve must
have a maximum service pressure rating for temperatures that equal or exceed
the maximum service temperature;
(2) The valve must be tested as part of the
manufacturing, as follows:
(A) With the valve
in the fully open position, the shell must be tested with no leakage to a
pressure at least 1.5 times the maximum service rating;
(B) After the shell test, the seat must be
tested to a pressure not less than 1.5 times the maximum service pressure
rating. Except for swing check valves, test pressure during the seat test must
be applied successively on each side of the closed valve with the opposite side
open. No visible leakage is permitted;
(C) After the last pressure test is
completed, the valve must be operated through its full travel to demonstrate
freedom from interference;
(3) Each valve must be able to meet the
anticipated operating conditions;
(4) No valve having shell components made of
ductile iron may be used at pressures exceeding eighty percent of the pressure
ratings for comparable steel valves at their listed temperature. However, a
valve having shell components made of ductile iron may be used at pressures up
to eighty percent of the pressure ratings for comparable steel valves at their
listed temperature, if:
(A) The
temperature-adjusted service pressure does not exceed 1,000 p.s.i.g.;
and
(B) Welding is not used on any
ductile iron component in the fabrication of the valve shells or their
assembly;
(5) No valve
having pressure containing parts made of ductile iron may be used in the gas
pipe components of compressor stations.
Disclaimer: These regulations may not be the most recent version. Hawaii may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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