§3280.705. Gas piping systems. — Inbound Citations

(1) Multi-section homes with fuel supply piping in both sections require crossover connections to join all sections of the home. The crossover design requirements are located in, and must be designed in accordance with, § 3280.705 of this chapter.

(b) All materials used for the installation, extension, alteration, or repair of any gas piping system shall be new and free from defects or internal obstructions. It shall not be permissible to repair defects in gas piping or fittings. Inferior or defective materials shall be removed and replaced with acceptable material. The system shall be made of materials having a melting point of not less than 1,450 F, except as provided in § 3280.705(e). They shall consist of one or more of the materials described in § 3280.705(b) (1) through (4).

(1) Steel or wrought-iron pipe shall comply with ASME B36.10 (incorporated by reference, see § 3280.4). Threaded brass pipe in iron pipe sizes may be used. Threaded brass pipe shall comply with ASTM B43. (incorporated by reference, see § 3280.4).

(2) Fittings for gas piping shall be wrought iron, malleable iron, steel, or brass (containing not more than 75 percent copper).

(3) Copper tubing must be annealed type, Grade K or L, conforming to ASTM B88 (incorporated by reference, see § 3280.4), or must comply with the ASTM B280 (incorporated by reference, see § 3280.4). Copper tubing must be internally tinned.

(4) Steel tubing must have a minimum wall thickness of 0.032 inch for tubing of 1/2 inch diameter and smaller and 0.049 inch for diameters 1/2 inch and larger. Steel tubing must be in accordance with ASTM Standard Specification for Electric-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines, ASTM A539-1999, and must be externally corrosion protected.

(5) Corrugated stainless steel tubing (CSST) systems must be listed and installed in accordance with ANSI LC 1 (CSA Group; incorporated by reference, see § 3280.4), and the requirements of this section.

(2) The connection(s) between units must be made with a connector(s) listed for exterior use or direct plumbing sized in accordance with paragraph (d) of this section. A shutoff valve of the non-displaceable rotor type conforming to ANSI Z21.15 (CSA Group; incorporated by reference, see § 3280.4), suitable for outdoor use must be installed at each crossover point upstream of the connection.

(18) ASTM D2846-92, Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Hot- and Cold-Water Distribution Systems, 1992; IBR approved for § 3280.604(c).

(b) All materials used for the installation, extension, alteration, or repair of any gas piping system shall be new and free from defects or internal obstructions. It shall not be permissible to repair defects in gas piping or fittings. Inferior or defective materials shall be removed and replaced with acceptable material. The system shall be made of materials having a melting point of not less than 1,450 F, except as provided in § 3280.705(e). They shall consist of one or more of the materials described in § 3280.705(b) (1) through (4).

(1) Steel or wrought-iron pipe shall comply with ASME B36.10 (incorporated by reference, see § 3280.4). Threaded brass pipe in iron pipe sizes may be used. Threaded brass pipe shall comply with ASTM B43. (incorporated by reference, see § 3280.4).

(2) Fittings for gas piping shall be wrought iron, malleable iron, steel, or brass (containing not more than 75 percent copper).

(3) Copper tubing must be annealed type, Grade K or L, conforming to ASTM B88 (incorporated by reference, see § 3280.4), or must comply with the ASTM B280 (incorporated by reference, see § 3280.4). Copper tubing must be internally tinned.

(4) Steel tubing must have a minimum wall thickness of 0.032 inch for tubing of 1/2 inch diameter and smaller and 0.049 inch for diameters 1/2 inch and larger. Steel tubing must be in accordance with ASTM Standard Specification for Electric-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines, ASTM A539-1999, and must be externally corrosion protected.

(5) Corrugated stainless steel tubing (CSST) systems must be listed and installed in accordance with ANSI LC 1 (CSA Group; incorporated by reference, see § 3280.4), and the requirements of this section.

(1) Voluntary Product Standard PS 1-09, Structural Plywood (With Typical APA Trademarks), effective May 1, 2009 (NIST PS 1); IBR approved for § 3280.304(b).