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See Chinese contents: Q/BQB 660-2021 Q/BQB 660-2021: High strength steel plates for pressure vessels
This Standard specifies the size, shape, technical requirements, inspection and test, marking and quality certificates of high-strength steel plates for pressure vessels. This Standard is applicable to high-strength steel plates for large heat input welding (welding heat input ??100kJ/cm) and low welding crack sensitive pressure vessels produced by Baoshan Iron and Steel Co., Ltd.
