ASTM A334 pipe API 650 welded storage tanks
This API 650 tank standard does not present orstablish a fixed series of allowable tank sizes: instead, it s intended to permit the purchaser to select whatever size API 650 welded storage tanks tank may best meet his needs.
Testing the Outer Tank: While the test pressure is being held, all welded seams and connections in the outer shell and roof shall be thoroughly inspected with a solution film unless they were previously checked with a vacuum box. The API 650 welded storage tanks air pressure shall be released. Pressure relief and vacuum relief valves shall be checked by applying the design gas pressure to the outer tank, followed by evacuation of the outer space to the vacuum setting of the relief valve.
In order to prevent the deformation of the bottom of metal vertical API 650 welded storage tanks during welding, comprehensive control measures such as strict control of assembly geometry size, reasonable welding procedure, process control of welding deformation and rigid fixation are adopted during assembly welding. The specific methods are as follows:1. Strictly control welding groove forming of API 650 welded storage tanks.2. Strictly control the size of tank welding seam assembly.3. Define the welding sequence of tank bottom plate.4. Reasonable distribution of welders.
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