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NYC Mechanical Code

§ 1107.5.1 — § 1107.5.1

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What is NYC MC § 1107.5.1?

Quick Answer

This section specifies the requirements for using carbon steel pipe in refrigerant liquid lines based on size and refrigerant group. It mandates specific wall thicknesses for different refrigerant classifications and outlines restrictions on the use of Type F steel pipe. Applies to building owners involved in the installation of refrigerant systems.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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1107.5.1 Steel pipe.

MC § 1107.5.1

Carbon steel pipe with a wall thickness not less than Schedule 80 shall be used for Group A2, A3, B2 or B3 refrigerant liquid lines for sizes 1.5 inches (38.1 mm) and smaller. Carbon steel pipe with a wall thickness not less than Schedule 40 shall be used for Group A1 or B 1 refrigerant liquid lines 6 inches (152.4 mm) and smaller, Group A2, A3, B2 or B3 refrigerant liquid lines sizes 2 inches (50.8 mm) through 6 inches (152.4 mm) and all refrigerant suction and discharge lines 6 inches (152.4 mm) and smaller. Type F steel pipe shall not be used for refrigerant lines having an operating temperature less than -20°F (-28.9°C).

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