Requalification is required every five years or sooner if the commissioner has a specific reason to doubt a welder's ability to make acceptable welds. Welders shall be qualified for all required pipe sizes, wall thicknesses and positions in accordance with the ASME Boiler and Pressure Vessel Code, Section IX.Installations, including any welding, shall be subject to special inspection.Bellows expansion joints shall not be utilized on high pressure steam piping.SSO shall be designed in accordance with the Steam Distribution Utility System requirements of the utility company having jurisdiction and ASME B31.1.Manual reset shall be required to reopen the SSO. SSO shall be designed to automatically close at or below the design pressure of the downstream piping system that is being protected, to provide positive shutoff against full upstream pressure.Safety Shutoff Valves ("SSO") to protect downstream piping from overpressure shall be allowed in lieu of a safety relief valve vented to the outdoors as required by Section 1006.6.Steam distribution systems utilizing pressure reducing valves.For steam pressures between 90 psig (621 kPa) and 16 psig (110 kPa), the system shall be designed for 125 psig (108 kPa). Systems using utility street steam shall be designed for a pressure of 200 psig (1379 kPa) and 413☏ (212☌) up to and including the steam pressure reducing valve or valves which reduce the pressure of 90 psig (621 kPa) or below.The design, size, material and location of all anchors, guides and auxiliary steel, and the stresses thereon.The location, type, specifications and details of all expansion joints.The operating pressures and temperatures.The plans and application shall contain, but not be limited to, the following information: An application and plans shall be filed and the approval of the department obtained. The system shall be designed by an engineer.Polyethylene (PE) pipe, tubing and fittings (for ground source heat pump loop systems)ĪSTM D 2513 ASTM D 3035 ASTM D 2447 ASTM D 2683 ASTM F 1055 ASTM D 2837 ASTM D 3350 ASTM D 1693 Polyethylene/aluminum/ polyethylene (PE-AL-PE) pressure pipe The exterior of the pipe shall be protected from corrosion and degradation.Īcrylonitrile butadiene styrene (ABS) plastic pipeĬopper or copper-alloy tube (Type K, L or M)Ĭhlorinated polyvinyl chloride (CPVC) plastic pipeĬross-linked polyethylene/ aluminum/cross-linked polyethylene (PEX-AL-PEX) pressure pipe Hydronic pipe shall conform to the standards listed in Table 1202.4.
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