API Std 650 flat-bottom tanks roof drain valves
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Oil storage tank is an important equipment commonly used in petroleum and petrochemical industry. New API Std 650 flat-bottom tanks, metal storage tank must be tested before it can be put into use or put into storage. The common inspection methods of API Std 650 flat-bottom tanks include radiographic testing, ultrasonic testing, magnetic particle testing and dye penetrant testing. The parts and operation requirements of these testing methods are different, so they should be selected according to the required characteristics.
Inspection of Butt-welds in PipingButt-welds in piping and in API Std 650 flat-bottom 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.
