--Two pressure vessels, each with a separate U symbol and Manufacturer's Data Report, are welded together at their respective nozzles. It is not within the scope of Sec VIII div1 as per U-1(e)(1)(a). Then what requirements (PWHT/NDE/Hydro etc.) and certification to be followed at site? below interpretation states the requirements are those indicated by the jurisdictional authorities at the point of installation.
Interpretation: VIII-78-136
Subject: Section VIII, Division 1, Scope
Date Issued: October 27, 1978
File: BC78-580
Question: Two pressure vessels, each with a separate U symbol and Manufacturer's Data Report, are welded together at their respective nozzles. Is the weld itself subject to the requirements of Section VIII, Division 1?
Reply: No. U-1(e)(1)(a) indicates that the geometry of pressure-containing parts includes the welding end connection for the first circumferential joint for welded connections. Further, this welding is being done subsequent to the stamping of the vessel. The applicable requirements are those indicated by the jurisdictional authorities at the point of installation.
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