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ASME B31.3-2016 <br /> A343 EXAMINATION PROCEDURES A345.4 Hydrostatic Leak Test <br /> Paragraph 343 applies in its entirety. A345.4.1 Test Fluid. Paragraph 345.4.1 applies. <br /> A345.4.2 Test Pressure (16) <br /> A344 TYPES OF EXAMINATION (a) Nonmetallic Piping. Except as provided in <br /> A344.1 General para.A345.4.3,the hydrostatic test pressure at any point <br /> in a nonmetallic piping system shall be not less than <br /> Paragraph 344.1 applies in its entirety. 1.5 times the design pressure, but shall not exceed <br /> A344.2 Visual Examination 1.5 times the maximum rated pressure of the lowest- <br /> rated component in the system. <br /> Paragraph 344.2 applies in its entirety. (b) Thermoplastic Piping. For piping systems in which <br /> A344.5 Radiographic Examination the design temperature is above the test temperature, <br /> para. 345.4.2(b) applies, except that S and ST shall be <br /> Radiographic examination may be used in accordance from Table B-1 instead of Table A-1 or Table A-IM. <br /> with para. 344.1.2. (c) Metallic Piping with Nonmetallic Lining. Paragraph <br /> A344.6 Ultrasonic Examination 345.4.2 applies. <br /> Ultrasonic examination may be used in accordance A345.4.3 Hydrostatic Test of Piping With Vessels as <br /> with para. 344.1.2. a System. Paragraph 345.4.3 applies. <br /> A344.7 In-Process Examination A345.5 Pneumatic Leak Test <br /> Paragraph 344.7 applies in its entirety. A345.5.1 Precautions. In addition to the require- <br /> ments of para. 345.5.1, a pneumatic test of nonmetallic <br /> piping is permitted only with the owner's approval, <br /> A345 TESTING and precautions in Appendix F, para. FA323.4 should <br /> be considered. <br /> A345.1 Required Leak Test A345.5.2 Other Requirements <br /> (a) Prior to initial operation,each piping system shall (a) Paragraphs 345.5.2 through 345.5.5 apply. <br /> be tested to ensure tightness. The test shall be a hydro- (b) PVC and CPVC piping shall not be pneumatically <br /> static leak test in accordance with para. A345.4, except tested. <br /> as provided herein. <br /> (b) Paragraphs 345.1(a) and (b) apply. A345.6 Hydrostatic-Pneumatic Leak Test <br /> A345.2 General Requirements for Leak Test If a combined hydrostatic-pneumatic leak test is used, <br /> the requirements of para. A345.5 shall be met, and the <br /> Requirements in para.A345.2 apply to more than one pressure in the liquid-filled part of the piping shall not <br /> type of leak test. exceed the values calculated in accordance with <br /> A345.2.1 Limitations on Pressure. Paragraphs para. A345.4.2 or 345.4.2, as applicable. <br /> 345.2.1(b) and (c) apply. A345.7 Initial Service Leak Test <br /> A345.2.2 Other Test Requirements <br /> (a) Paragraph 345.2.2(a) applies. Paragraph 345.7 applies in its entirety for Category D <br /> (b) The possibility of brittle fracture shall be consid- Fluid Service only. <br /> ered when conducting leak tests on brittle materials or A345.8 Sensitive Leak Test <br /> at low temperature. <br /> (c) Paragraphs 345.2.3 through 345.2.7 apply. Paragraph 345.8 applies. <br /> A345.3 Preparation for Leak Test <br /> A346 RECORDS <br /> Paragraph 345.3 applies in its entirety, considering <br /> bonds in place of welds,and excluding expansion joints. Paragraph 346 applies in its entirety. <br />