Do you know what the requirements are for steel plate inspection?

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Steel plate acceptance requirements: The following are the requirements for steel plate acceptance, for reference. 01 An original quality certificate provided by the material manufacturer must be available, and a clear and durable stamp or other mark must be applied in a visible location on the material. This mark should include the material standard number, grade, specifications, furnace (batch) number, name of the material manufacturer (or factory logo), approval mark, and inspection seal mark. The contents of the material quality certificate must be complete and legible, and it must bear the quality inspection stamp of the material manufacturing unit. 02 If a pressure vessel manufacturing unit obtains the materials for pressure vessels from a non-material manufacturing unit, it shall obtain either the original quality certificate provided by the material manufacturing unit, or a valid copy stamped with the inspection seal of the material supplier and the signature of the responsible person. The pressure vessel manufacturing unit shall be responsible for the authenticity and consistency of the pressure vessel materials obtained as well as the material quality certificates. 03 The quality and specifications of the materials used for pressure vessels shall comply with the **standards or industry standards applicable to such materials. 04 Check all the markings that should be present on the steel plate; these markings must match those on the material certificate. 05 The surface quality of the steel plate shall meet the following requirements: a. The surface of the steel plate shall be free from cracks, tears, bubbles, folds, inclusions, scabs, and embedded scale; the steel plate shall also be free from layering. b. A thin layer of iron oxide scale or rust on the surface of the steel plate is permitted, provided that it does not hinder the inspection of surface defects. Slight roughness or scratches caused by the shedding of this oxide scale, mesh patterns resulting from rolling, and other local defects are also allowed. However, the degree of unevenness, measured based on the actual dimensions of the steel plate, must not exceed half of the allowable thickness tolerance for the plate, and it must be ensured that the thickness at the defective areas is not less than the minimum allowable thickness for the steel plate. c. Local defects on the surface of the steel plate may be cleaned, but welding or plugging is not allowed as cleaning methods. It can be cleaned using a chisel or grinder; the cleaned area should be smooth with no sharp edges. The cleaning depth, measured from the actual size of the steel plate, must not exceed half of the thickness tolerance of the steel plate, and it must be ensured that the thickness of the cleaned area is not less than the minimum allowable thickness for the steel plate. d. For stainless steel plates, the allowable depth of pitting, dents, scratches, and rough surfaces is smaller than that for carbon steel and low-alloy steel plates. Defects that exceed the specified depth can be removed by grinding.