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How to inspect Stainless Steel Storage Tank

Aug 24 2023 VIEWS:192

Internal inspection

1, the inner surface and manhole transfer storage tank is damaged by corrosives, welding, stainless steel head connection area or other stress areas are cracked;

2. When the internal and external surfaces of the storage tank are corroded, accurate wall thickness measurements should be carried out in several places to solve the problems. If the accurately measured thickness is lower than the small wall thickness of the design scheme, the compressive strength should be verified again, and the proposal of whether the high pressure can be applied again should be clearly put forward.

3. When there are shortcomings such as decarbonization, stress corrosion, stress corrosion and fatigue cracks in the inner cavity of the storage tank, metallographic inspection and surface strength measurement should be carried out, and a test report should be clearly presented.

External inspection

1. Check whether the anti-corrosion layer, heat insulation layer and equipment identification plate of Stainless Steel Storage Tank are damaged, and whether the safety notes and operating equipment are complete;

2, the outer surface has no cracks, shape acid, partial overtemperature and other conditions;

3, transfer welding, stress components have no leakage, tighten the anchor bolt is damaged, basically no downward, oblique and other abnormal phenomena.

All-round inspection

1, the key welding or cover to carry out no damage inspection, sampling inspection length is 20% of the total length of welding;

2, after reaching the standard of the external environment inspection, the pressure test is carried out according to 1.25 times the working pressure of the Stainless Steel Storage Tank design plan and the air tightness test is carried out according to the working pressure of the storage tank design plan.

In the whole process of inspection, there is no leakage in the storage tank and other welding, and no visible abnormal deformation of the storage tank is up to the standard; After the inspection of the storage tank, it is necessary to make a report on its inspection, indicating the problems and reasons that can be applied again or can be applied again but need to be trimmed and can not be applied, and the inspection list should be stored and kept for convenient maintenance and review.

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