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3.4 EXPANSION <br />A. Install piping to allow for proper expansion and movement. Provide expansion loops and <br />offsets as required to minimize pipe stresses. Provisions for expansion shall meet the <br />requirements of the ASME Boiler and Pressure Vessel Code and Pressure Piping <br />Standards. Where space is limited or where expansion can not be accommodated as <br />indicated above provide expansion joints. <br />3.5 PIPING <br />A. Work shown is diagrammatic and shall be installed as required to meet field conditions. <br />Work shall not be closed up prior to completion of inspection and testing. <br />3.6 PIPE AND SYSTEM IDENTIFICATION <br />A. All pipe and pipe coverings shall be labeled with system description and flow direction. <br />Labels shall be as previously specified. <br />B. Labels shall be placed at twenty foot (20') intervals on all pipes, at each branch <br />connection and adjacent to each valve or piece of equipment. <br />C. Labels shall be applied after completion of painting in area. Care shall be taken to insure <br />that surfaces are clean and free of dust before application. <br />3.7 TESTING <br />A. Furnish all materials, supplies, labor and power required for testing. Make preliminary <br />test and prove work satisfactory. Notify Engineer in ample time to be present for final <br />testing of all piping. Tests shall be performed prior to concealing, covering or insulating <br />work. Repair any defects, or if required by Engineer, replace defective work with new <br />without additional cost to Owner. <br />B. Make tests in stages if so ordered by Engineer to facilitate work of others. Provide <br />additional materials required for partial tests without cost to Owner. <br />C. Contractor shall be responsible for work of other trades disturbed or damaged by tests <br />and/or repair of work. Damaged work shall be returned to its original condition or <br />replaced without additional costs to the Owner <br />D. Perform additional tests as may be required under other sections of the Specifications or <br />required by current local, state or federal regulations and include all costs in the bid. <br />E. Unless specified otherwise, all piping shall be hydrostatically tested to 150 psig. <br />Disconnect and cap off piping connection to equipment not rated for such test pressures. <br />Retest system at lower allowable pressure with equipment reconnected after remainder of <br />system has been proven. Tests shall be two (2) hours in duration during which time <br />systems shall show no signs of leakage. No repair work shall be conducted on system <br />being tested during test. <br />15050 - 3