This standard specifies the technical requirements, test methods, inspection rules, signs and supplementary requirements for pressure-bearing steel castings. This standard is applicable to pressure-bearing steel castings, including pressure-bearing steel castings for pressure vessels produced in accordance with the requirements of the "Pressure Vessel Safety Technology Supervision Regulations" and pressure-bearing steel castings not produced in accordance with the "Pressure Vessel Safety Technology Supervision Regulations". This standard does not cover the welding process of pressure-bearing steel castings for cast-welded structures and the properties of weldments