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A841 grade B plates 30 ft in diameter API650 oil tank

A841 grade B plates 30 ft in diameter API650 oil tank

A841 grade B plates 30 ft in diameter API650 oil tank

The hardness of the welds contacting these environments, including the heat-affected zones, shall be considered. The weld metal and adjacent heat-affected zone often contain a zone of hardness that is well in excess of a value of 22 on the Rockwell C scale and could be expected to be more susceptible to cracking than would unwelded metal. Any hardness criteria shall be a matter of agreement between the Purchaser and the 30 ft in diameter API650 oil tank manufacturer and shall be based on an evaluation of the expected hydrogen sulfide concentration in the product, the possibility of moisture being present on the inside metal surface, and the strength and hardness characteristics of base metal and weld metal.

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 30 ft in diameter API650 oil tank, the consumption of 30 ft in diameter API650 oil tank is different, so it should be taken into account when evaluating the remaining service life of 30 ft in diameter API650 oil tank.

The outer layer of API 650 tank is glass fiber reinforced plastic layer with a thickness of more than 2.5mm, which 30 ft in diameter API650 oil tank has strong corrosion resistance and electric corrosion resistance. Special process technology is used between the two layers to make the gap reach 0.1 mm, so as to eliminate the existence of potential safety hazard from the root.

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