API 650 larger diameter tanks striking plates
In order to ensure the safety of the vertical storage tank, API 650 larger diameter tanks, the supplier should inspect the tank carefully before delivery. The failure of the tank body is mainly due to the weld and crack of the product. The inspection of API 650 larger diameter tanks, vertical storage tank weld and microcrack is mainly to inspect the appearance forming quality of weld. The inspection contents include weld leg height, undercut, welding deformation, weld bead, arc pit, weld straightness, etc., as well as the internal quality of weld, such as slag inclusion, porosity, incomplete penetration, crack, incomplete fusion, etc.
Inspection of Butt-welds in PipingButt-welds in piping and in API 650 larger diameter tanks pipe fittings within the limitations of 1.3.2 (including the annular space of double- wall tanks) shall be inspected in conformance with API 620 oil tank standard Q.7.7.2 through Q.7.7.6. Longitudinal welded joints in piping that contains liquid shall be completely radiographed except for manufactured pipe welded without filler metal, 12 in. or less in diameter, which is tested hydrostatically or by eddy current to ASTM requirements.
The vent pipe mouth should be 4m or more above the ground. The nominal diameter of the API 650 larger diameter tanks API 650 petroleum storage tank vent pipe should be no less than 50mm and a flame arrestor should be installed.
