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C. Install hangers with the following minimum rod sizes and maximum spacing: ' <br /> Nom Pipe Size Max.Span-Ft Min.Rod Size-Inches <br /> 1 7 3/8 <br /> 1-1/2 9 3/8 , <br /> 2 10 3/8 <br /> 3 12 1/2 <br /> 3-1/2 13 1/2 <br /> 4 14 5/8 <br /> 5 16 5/8 <br /> 6 17 3/4 <br /> 8 19 7/8 <br /> 10 22 7/8 <br /> 12 23 7/8 <br /> D. Support vertical runs at each floor. <br /> 3.04 PIPE JOINT CONSTRUCTION <br /> A. Welded Joints: Comply with the requirements in ASME Code B31.9-"Building Services Piping." <br /> B. Threaded Joints: Conform to ANSI B1.20.1, tapered pipe threads for field cut threads. Join pipe, fittings, and <br /> valves as follows: <br /> 1. Note the internal length of threads in fittings or valve ends,and proximity of internal seat or wall,to determine <br /> how far pipe should be threaded into joint. <br /> 2. Align threads at point of assembly. <br /> 3. Apply appropriate tape or thread compound to the external pipe threads (except where dry seal threading is <br /> specified). <br /> 4. Assemble joint to appropriate thread depth. When using a wrench on valves place the wrench on the valve end <br /> into which the pipe is being threaded. <br /> 5. Damaged Threads: Do not use pipe with threads which are corroded or otherwise damaged. If a weld opens <br /> during cutting or threading operations,that portion of pipe shall not be used. <br /> C. Flanged Joints: Align flanges surfaces parallel. Assemble joints by sequencing bolt tightening to make initial <br /> contact of flanges and gaskets as flat and parallel as possible. Use suitable lubricants on bolt threads. Tighten bolts <br /> gradually and uniformly to appropriate torque specified by the bolt manufacturer. <br /> 3.05 STEAM TRAP INSTALLATIONS <br /> A. Install steam traps in accessible locations as close as possible to connected equipment. Maximum allowable <br /> distance from equipment is 4 feet. <br /> 1. Unless otherwise indicated, install gate valve,strainer,and union upstream from the trap;install union, check <br /> valve,and gate valve downstream from trap. <br /> 3.06 VALVE APPLICATIONS <br /> A. General Duty Valve Applications: The Drawings indicate valve types to be used. Where specific valve types are <br /> not indicated the following requirements apply: <br /> 1. Shut-off duty: use gate,ball,and butterfly valves <br /> 15520-8 No.99132-CP2 <br />