Specifications - City of Montpelier, Vermont

Montpelier District HeatingCity of Montpelier, VTIssue Date:September 28, 2012Title:APPENDIX A – Welding and Testing RequirementsPage #:20 of 22V. HYDROSTATIC TESTING OF PIPING WELDSWhere required as part of the construction contract, the CONTRACTOR shall be responsible fornotification to the City of Montpelier Mechanical Inspection Department of all proposedhydrostatic testing.The CONTRACTOR is responsible for all costs associated with hydrostatic testing. TheCONTRACTOR shall refer to Appendix A, Section II, Paragraph 18.1.3. for the use of liquidpenetration testing in lieu of hydrostatic testing.The CONTRACTOR shall be responsible for notifying the ENGINEER at least 24 hours prior tothe proposed start of hydrostatic testing.A copy of the Hydrostatic Testing Record can be found in Appendix B. Hard copies will beprovided to the CONTRACTOR by the OWNER upon request.1.0 PROCEDURE REQUIREMENTS1.1 Leak testing shall be performed in accordance with the Specification and therequirements of ANSI B31.1, Section 137.1.2 All leak testing performed on the piping system shall be hydrostatic testing,unless the procedures of Appendix A, Section II, Paragraph 18.1.3 are followedby the CONTRACTOR.1.3 The CONTRACTOR shall develop a procedure for hydrostatic testing andsubmit it to the ENGINEER for review and release prior to any hydrostatictesting occurring.2.0 EXAMINATION PROCEDURE2.1 After the joints have been welded and the pipe has been placed in its finalposition in the piping system, but before the pipe coating and/or insulation isapplied, the CONTRACTOR shall Leak Test all joints.2.2 All welded joints shall be open, clean and accessible for circumferentialinspection prior to the start of and during hydrostatic testing.2.3 The CONTRACTOR shall furnish and install suitable temporary testing plugs orcaps for the pipeline, all necessary bracing, pressure pumps, pipe connections,meters, calibrated gages and other similar equipment, and all labor required.2.4 The meter and gage shall be installed by the CONTRACTOR in such a mannerthat all water entering the section under test will be measured and the pressurein the section indicated, and shall be kept in use during the test.2.5 The section of pipe to be tested shall be filled with water of approved quality.2.6 All air shall be expelled from the pipe.2.6.1 If air releases or blow-offs are not available at high points for releasingair, or if drains or blowdowns are not available at low points for drainingwater, the CONTRACTOR may, with the prior approval of theENGINEER, add the necessary permanent attachments in accordancewith Appendix A, Section II, Paragraphs 11.1, 11.2, and 11.3, to properlyconduct the test.2.6.1.1 All permanent attachments shall be properly plugged uponcompletion of the test.APPENDIX APage A20