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3.2 UNIONS <br />A. Provide unions (or flanged connections) where indicated and in connections to all <br />equipment, apparatus and specialties. Locate unions (or flanged connections) between <br />shut-off valves and equipment. <br />B. Screwed unions shall be ground joint type, for copper tubing; all brass, for steel - <br />malleable iron with brass seats; galvanized or black, same as piping in which used. <br />3.3 EXPANSION <br />A. Install piping so as to permit thermal expansion and movement at building expansion <br />joints, without damage. Provide sufficient expansion loops, offsets, changes in direction <br />and swing connections to keep stresses within limits set by ASME Code for pressure <br />piping. <br />3.4 JOINTS <br />A. Make solder joints for copper tubing associated with potable water with non-corrosive <br />lead-free flux and lead free solder in accordance with manufacturer's instructions and by <br />thoroughly competent workmen. Clean, debur and ream ends of pipe after cutting and <br />before application of flux. <br />END OF SECTION <br />15110 - 2