Visually observing the joints and connections during the leak test in accordance with paras. 345.2.2(a) and 345.3.1 is not required, provided all of the following conditions are satisfied:
(a) The welded joints and connections are on the inner pipe of jacketed piping.
(b) A leak test is performed that otherwise meets the requirements of para. 345.1, except visual examination of joints and connection in accordance with paras. 345.2.2(a) and 345.3.1 is not required.
(c) A sensitive leak test is performed in accordance with para. 345.8 to demonstrate leak tightness of welded joints and connections that are not visually examined during the leak testing required in (b) above.
Question: When visual examination is not possible and exempted even it specified explicitly in para (b) above, how the bubble leak test — Direct Pressure Technique in accordance with the BPV Code, Section V,Article 10, Appendix I will be preformed?
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