What does the minimum thickness of 6.8 in storage tank AQ3053 mean?
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This post was last edited by wanghbabc on 2019-6-4 at 16:58. How should the minimum thickness of 6.8 be understood in tank AQ3053? If it is interpreted as the minimum actual thickness, does that mean stainless steel storage tanks cannot use plates that are 5 millimeters thick? Since the corrosion amount is 0, but there is still a negative deviation such as -0.3, the actual minimum thickness becomes 4.7 mm. Less than 5 millimeters – it can no longer be used. Of course, if it is interpreted as the minimum nominal thickness, then negative deviations are also included; in the example given above, 5 millimeters of stainless steel can be used for storage tanks. Is there any definition of this standard or explanatory documentation? Or does the Security Inspection Bureau (Ministry of Emergency Management) have any authoritative statement on this issue? Please give me some advice.
5mm stainless steel should work.
It only mentions that no corrosion allowance is included; it doesn’t mention a negative deviation, especially since the negative deviation for pipes used as cylinder shells is relatively high.