Minn. R. agency 206, ch. 5230, CODE FOR AMMONIA REFRIGERATION SYSTEMS, pt. 5230.5007 - CHAPTER 15, OVERPRESSURE PROTECTION DEVICES
Subpart 1.
Chapter 15.2.7.
ANSI/IIAR 2, chapter 15.2.7, is amended to read as follows:
15.2.7. 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.
Subp. 2.
Chapter 15.2.8.2.
ANSI/IIAR 2, chapter 15.2.8.2, 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.
Subp. 3.
Chapter 15.3.3.
ANSI/IIAR 2, chapter 15.3.3, is amended by adding a subsection as follows:
15.3.3.1. Where the refrigerant inlet and outlet of air-cooled or evaporative condensers can be isolated, they shall be equipped with overpressure protection.
Subp. 4.
Chapter 15.4.3.
ANSI/IIAR 2, chapter 15.4.3, is amended to read as follows:
11.3.3. The discharge piping from pressure relieving devices to atmosphere shall be a minimum schedule 40 steel for all pipe sizes.
Notes
Statutory Authority: MS s 326B.925
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