A516 grade 65 plates API standard 650 carbon steel storage tanks
The welded steel API 650 storage tank API standard 650 carbon steel storage tanks is designed, manufactured and installed on the surface according to the API standard system classification. API 650, API620 and API 12D belong to the API standards for professional construction.
All oil tanks have service life. Due to the pressure of the oil stored on the tank and the corrosion of the oil and external environment on the tank, the oil storage tank will gradually become thin or crack after a long time. Due to the different materials and environment of API standard 650 carbon steel storage tanks, the consumption of API standard 650 carbon steel storage tanks is different, so it should be taken into account when evaluating the remaining service life of API standard 650 carbon steel storage tanks.
All welded seams in the API standard 650 carbon steel storage tanks bottom, and complete penetration and complete fusion sidewall-to-bottom welds, shall be inspected by means of a vacuum box test as described in Q.8.2.1. Sidewall-to-bottom welds not having complete penetration and complete fusion shall be inspected by means of either a vacuum box test of the inside weld as described in API 620 specification Q.8.2.1, or where approved by the Purchaser, a direct pressure solution film test as described in Q.8.2.2.
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