Laserfiche WebLink
C. Install hangers for horizontal piping with the following maximum spacing and minimum rod sizes: , <br /> Nom Pipe Steel Pipe Copper Tube Min.Rod <br /> Size-Inches Max.Span-Ft. Max.Span-Ft. Dia.-Inches. <br /> Up to 3/4 7 5 3/8 ' <br /> 1 .7 6 3/8 <br /> 1-1/4 7 7 3/8 <br /> 1-1/2 9 8 3/8 ' <br /> 2 10 8 3/8 <br /> 2-1/2 11 9 1/2 <br /> 3 12 10 1/2 ' <br /> 3-1/2 13 11 1/2 <br /> 4 14 12 1/2 <br /> 5 16 13 5/8 <br /> 6 17 14 3/4 , <br /> 8 19 16 7/8 <br /> 10 22 18 7/8 <br /> 12 23 19 7/8 ' <br /> D. Support vertical steel pipe and copper tube at each floor. <br /> 3.05 PIPE AND TUBE JOINT CONSTRUCTION , <br /> A. Soldered Joints: Comply with the procedures contained in the AWS"Soldering Manual." <br /> B. Brazed Joints: Comply with the procedures contained in the AWS"Brazing Manual." ' <br /> 1. CAUTION: Remove stems, seats, and packing of valves and accessible internal parts of piping specialties ' <br /> before soldering and brazing. <br /> 2. Fill the tubing and fittings during soldering and brazing with an inert gas (nitrogen or carbon dioxide) to <br /> prevent formation of scale. , <br /> 3. Heat joints to proper and uniform temperature. <br /> C. Threaded Joints: Conform to ASME 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 wrench tight. Wrench on valve shall be on the valve end into which the pipe is being threaded. ' <br /> a. Damaged Threads: Do not use pipe with corroded or damaged threads. If a weld opens during cutting or , <br /> threading operations,that portion of pipe shall not be used. <br /> D. Flanged Joints: Align, flange 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 with a torque wrench. <br /> 15411-8 No.99132-CP2 ' <br />