Wisconsin Administrative Code
Public Service Commission
Chapter PSC 135 - Gas Safety
Subchapter II - Additions to 49 CFR Part 192
Section PSC 135.199 - Requirements for design of pressure relief and limiting devices additions [49 CFR 192.199]
Universal Citation: WI Admin Code ยง PSC 135.199
Current through August 26, 2024
(1) After 49 CFR 192.199(e), insert:
(ew) In addition, the outlet ports shall be
insect-proof and consideration shall be given to all exposures in the immediate
vicinity including windows or locations where gas can enter confined
areas;
(2) After 49 CFR 192.199(h), insert:
(hw) Acceptable methods for complying with
49
CFR 192.199(h) are:
(1) Lock the stop valve in the open position.
Instruct authorized personnel of the importance of not inadvertently leaving
the stop valve closed and of being present during the entire period that the
stop valve is closed so that they can lock it in the open position before they
leave the location.
(2) Install
duplicate relief valves, each having adequate capacity by itself to protect the
system and arrange the isolating valves or 3-way valve so that mechanically it
is possible to render only one safety device inoperative at a time.
(iw) Precautions shall be taken to
prevent unauthorized operation of any valve which will make pressure limiting
devices inoperative. This provision applies to isolating valves, by-pass
valves, and valves on control or float lines which are located between the
pressure limiting device and the system which the device protects. A method
similar to s. PSC 135.199(2) (hw), shall be considered acceptable in complying
with this provision.
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