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C. Do not run piping through transformer vaults and other electrical or electronic equipment spaces <br /> and enclosures unless unavoidable. Install drip pan under piping that must be run through <br /> electrical spaces, verify with Engineer prior to running of pipe. <br /> D. Provide joints of type indicated in each piping system. <br /> 1. Braze copper tube and fitting joints in accordance with ANSI B31. <br /> 2. Solder copper tube-and-fitting joints where indicated, in accordance with recognized <br /> industry practice. Cut tube ends squarely, ream to full inside diameter, and clean outside <br /> of tube ends and inside of fittings. Apply solder flux to joint areas of both tubes and <br /> fittings. Insert tube full depth into fitting, and solder in manner which will draw solder full <br /> depth and circumference of joint. Wipe excess solder from joint before it hardens. <br /> 3.2 PIPING TESTS <br /> A. Test pressure piping in accordance with ANSI B31. <br /> B. Required test period is 24 hours with no pressure drop. <br /> C. Test long runs of Schedule 40 pipe at 150 PSI, except where fittings are a lower Class or <br /> pressure rating. <br /> D. Test each piping system at 150% of operating pressure indicated, but not less than 25 PSI test <br /> pressure. <br /> E. Observe each test section for leakage at end of test period. Test fails if leakage is observed or if <br /> pressure drop exceeds 5% of test pressure. <br /> F. Repair piping systems sections which fail required piping test, by disassembly and re-installation, <br /> using new materials to extent required to overcome leakage. Do not use chemicals, stop-leak <br /> compounds, mastics, or other temporary repair methods. <br /> END OF SECTION 23 21 01 <br /> CEA#18010 HVAC PIPE, TUBE AND FITTINGS 2321 01 -4 <br /> COPYRIGHT©2018 CONSULTING ENGINEERING ASSOCIATES, INC. <br />