Refrigerant Piping Insulation Specification

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Refrigerant piping insulation specification.

This guide specification covers the requirements for refrigerant piping systems inside of buildings or leading from equipment adjacent to buildings. Section 120 3 requirements for pipe insulation the piping for all space conditioning and service water heating systems with fluid temperatures listed in table 120 3 a shall have the amount of insulation specified in subsection a or b. Refrigerant pipe pipe gage thermometer oil separator last modified by. With energy codes getting stricter during each code cycle and some large lawsuits related to refrigerant piping being.

Bunn elizabeth cfm company. Ap armaflex the world s most recognized brand of closed cell foam insulation provides superior protection against thermal losses condensation and moisture accumulation that leads to mold. The insulation thickness shall be as follows. Refrigerant piping 10 07 note.

Product information model number of unit components condensing section evaporator etc. If liquid lines pass through a space that is warmer than the refrigerant i e. Here we describe defects in refrigerant piping insulation problems caused by defective refrigerant piping insulation recommended installation practices for refrigerant tubing insulation in building walls or cavities as well as outdoors where exposed to the weather and interior leaks on in wall below a split system air conditioner wall. They are warm to hot 110 f 43 3 c for air cooled.

The roof of a building at roof level or if they could be considered hot enough to pose a safety risk then insulation should be added. This section specifies field refrigerant piping for direct expansion hvac systems and associated drain and condenser water piping for walk in refrigerators and freezers including required pipe insulation. Refrigerant piping design check list the first step in refrigerant piping design is to gather product and jobsite information. 8 2 2 insulation closed cell class o armaflex tubes with built in anti microbial protection shall be fitted to all pipework.

Insulation conductivity shall be determined in accordance with astm c335 at the mean temperature listed in table 120 3 a and shall be rounded to the. A checklist for each is provided below. Refrigerant piping insulation has historically escaped the scrutiny that it has found itself under recently in some jurisdictions. It is the ideal choice for insulating mechanical piping systems.

Piping and fittings for refrigerant vapor suction lines shall be insulated with insulation having a thermal resistivity of at least r 3 and having external surface permeance not exceeding 0 05 perm 2 87 ng s m 2 pa when tested in accordance with astm e 96. What could possibly be such a big deal with plain old boring refrigerant piping insulation. Refrigeration pipe size insulation thickness inch o d mm o d mm 1 4 6 3 6 3 8 9 5 and above 13 all joints shall be glued to ensure a vapour seal.