How to test deck seams of API standard 650 flat-bottom tanks

Steel storage tanks Cover Plates MaterialASTM A516 Gr 55 Carbon Steel Pressure Vessel Plates for API standard 650 flat-bottom tanksASTM A285, Pressure Vessel Plates for Low- and Intermediate-Tensile StrengthASTM A307 Carbon Steel Bolts and StudsASTM A320 Alloy Steel Bolting Materials for Low-Temperature ServiceASTM A333 Seamless and Welded Steel Pipe for Low-Temperature ServiceASTM A334 Seamless and Welded Carbon and Alloy-Steel Tubes for Low-Temperature ServiceASTM A350 Forgings, Carbon and Low-Alloy Steel for Piping ComponentsASTM A351 Castings for Pressure-Containing PartsASTM A353 Pressure Vessel Plates, Alloy Steel

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Before pressure test, the main drain hose system of API 650 petroleum storage tank floating roof should be thoroughly flushed. Provide blind flanges, gaskets and bolts required for the API standard 650 flat-bottom tanks test (other types of covers are also required if necessary). Covers for maintenance shall be provided in accordance with the interfaces specified by API 650 petroleum storage tanks, and these seals shall remain in place after the test; and for those interfaces that are not provided for maintenance covers, the covers can be removed after the API standard 650 flat-bottom tanks test.