CSA 6.26:2014 pdf download.Fuel gas piping systems using corrugated stainless steel tubing
4.1.4 The manufacturer shall supply evidence acceptable to the testing agency that all materials have been evaluated and found to be suitable for their intended usage. Test data based on ASTM or other appropriate test procedures, certifications or historical data shall be submitted for this purpose. The evidence shall show that the materials have been evaluated, as appropriate, for resistance to moisture,corrosion, the effects of general household chemicals and the effects of fuel gases, including sulfur compounds therein, and that non-metallic materials exposed to the atmosphere are suitably resistant to the effects of ozone.
4.1.5 The manufacturer shall provide to the test agency documented evidence that tubing and fitting components have been subjected to the Standard Practice for Operating Salt Spray (Fog) Apparatus,ASTM B117, for not less than 96 hours without evidence of pitting, flaking, cracking or signs of corrosive attack.
4.1.6 For tubing which includes a non-metallic coating or covering, the coating shall comply with the international color designation of yellow. A jacket or covering applied to the tubing shall be either yellow or black, and marked in a contrasting color.
4.3 Gas pressure regulators
A piping system for use at gas pressures exceeding 0.5 psi (3.45 kPa), but intended to serve equipment rated for 0.5 psi (3.45 kPa) maximum, shall include a gas pressure regulator to limit the downstream supply pressure to 0.5 psi (3.45 kPa), and the installation instructions for the piping system shall specify that such a regulator shall be installed (see Clause 4.7-m). Gas pressure regulators supplied by the manufacturer for use with CSST systems shall comply with a nationally recognized standard for pressure regulators.
For system pressures up to 5 psi (34.5 kPa), the regulator shall either incorporate construction which will "lock up" under no-flow conditions to prevent downstream pressure in excess of 5 psi (34.5 kPa) or the regulator must be installed with an overpressure protection device.
4.4 Manually operated gas valves
A manually operated gas valve supplied as part of a gas piping system shall comply with the Standard for Manually Operated Metallic Gas Valves for Use in Gas Piping Systems Up to 125 psig, ANSI/ASME B16.33,or with IAS U.S. Requirements for Manually Operated Gas Valve for Use in House Piping Systems,No.3-88, or with Canadian standards for Lever Operated Non-Lubricated Gas Shut-Off Valves, CGA 3.16,Lever Operated Pressure Lubricated Plug Type Gas Shut-Off Valves, CGA 3.11, or Manually Operated Gas Valves for Use on Gas Piping, CGA CR91-002; and shall have a pressure rating of not less than 5 psi (34.5 kPa), or shall comply with the standard for Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves, Z21.15●CGA 9.1, for pressures less than 0.5 psi (3.45 kPa).
Valves complying with IAS U. S. Requirement 3-88 or CGA CR91-02, and not complying with ASME B16.33 or CGA 3.11, shall be limited to indoor installations.CSA 6.26 pdf download.