N.Y.C. Admin. Code § MC 1303: Section MC 1303: Joints and Connections

1303.1 General.

Joints and connections shall conform to the ASTM Standards listed in Table 1302.5, shall be of a type approved for fuel-oil piping systems, shall be rated for the temperatures and pressures of the systems in which the devices are installed, and shall be compatible with the fluid and all materials used. All threaded joints and connections shall be made tight with suitable lubricant or pipe compound. Unions and flanges, right or left couplings, and sweat fittings shall be brazed in accordance with ASME Boiler and Pressure Vessel Code, Section IX (Welding and Brazing Qualifications) or in accordance with AWS B2.2 Standard for Brazing Procedure and Performance Qualification. Cast-iron fittings shall not be used. Joints and connections shall be tight for the pressure required by test. Flanged joints requiring gaskets or packing shall be equipped with gaskets rated for a minimum of 750°F (398.9°C).

1303.1.1 Joints between different piping materials.

Joints between different piping materials shall be made with adapter fittings. Joints between different metallic piping materials shall be made with dielectric fittings. All such fittings shall conform with the requirements of Section 1203.

1303.2 Reserved.

1303.3 Joint preparation and installation.

Where required by Sections 1303.4 through 1303.10, the preparation and installation of brazed, threaded and welded joints shall comply with Sections 1303.3.1 through 1303.3.4.

1303.3.1 Brazed joints.

All joints shall be brazed in accordance with ASME Boiler and Pressure Vessel Code, Section IX Welding and Brazing Qualifications or in accordance with American Welding Society AWS B2.2 Standard for Brazing Procedure and Performance Qualification.

1303.3.2 Reserved.

1303.3.3 Threaded joints.

Threads shall conform to ASME B1.20.1. Pipe-joint compound or tape shall be applied on the male threads only and shall be compatible for application on the piping material and fluid.

1303.3.4 Welded joints.

All joints shall be welded in accordance with ASME Boiler and Pressure Vessel Code, Section IX Welding and Brazing Qualifications or in accordance with AWS B2.1 Specifications for Welding Procedure and Performance Qualification.

1303.4 Brass pipe.

Joints between brass pipe or fittings shall be brazed, threaded or welded joints complying with Section 1303.3.

1303.5 Reserved.

1303.6 Copper or copper-alloy pipe.

Joints between copper or copper-alloy pipe or fittings shall be brazed, threaded or welded joints complying with Section 1303.3.

1303.7 Copper or copper-alloy tubing.

Joints between copper or copper-alloy tubing or fittings shall be brazed joints complying with Section 1303.3 or flared joints. Flared joints shall be made by a tool designed for that operation.

1303.8 Nonmetallic pipe.

Joints between nonmetallic pipe or fittings shall be installed in accordance with the manufacturer's instructions for the labeled pipe and fittings.

1303.9 Steel pipe.

Joints between steel pipe or fittings shall be threaded or welded joints complying with Section 1303.3.

1303.10 Reserved.

1303.11 Piping protection.

Proper allowance shall be made for expansion, contraction, jarring and vibration. Piping other than tubing, connected to underground tanks, except straight fill lines and test wells, shall be provided with flexible connectors, or otherwise arranged to permit the tanks to settle without impairing the tightness of the piping connections. Piping serving equipment at levels above the lowest floor or storage tanks at levels above the lowest floor in buildings shall also comply with the requirements of Section 1305.9.6 and 1305.9.7. Piping that is routed outside of the building or on the roof shall be provided with a protective coating to prevent rust. Supports for such piping shall be made of stainless steel or other corrosion resistive material.