ANSI/IIAR 2, chapter 15.2.5, is amended to read as follows:
15.2.5. Relief valves shall not be located in refrigerated spaces unless precautions are taken to prevent moisture migration into the valve body or relief valve vent line. A drip pocket the size of the discharge pipe and at least 24 inches in length must be installed below a vertical riser in the discharge pipe and must be fitted with a drain plug or valve.
ANSI/IIAR 2, chapter 184.108.40.206, is amended by adding the following paragraph at the end:
Rupture discs may only be used when installed in series with a pressure relief valve.
ANSI/IIAR 2, chapter 15.3.2, is amended by adding a subsection as follows:
220.127.116.11. Where the refrigerant inlet and outlet of air-cooled or evaporative condensers can be isolated, they shall be equipped with overpressure protection.
ANSI/IIAR 2, chapter 15.4.3, is amended to read as follows:
15.4.3. The discharge piping from pressure relieving devices to atmosphere shall be a minimum schedule 40 steel for all pipe sizes.
MS s 326B.925
34 SR 145; 39 SR 1343; 42 SR 1423
May 15, 2018