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シームレス鋼管9711と5310、どちらの製造・検査基準の方が厳しいですか?

2020-12-23View Original

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シームレス鋼管9711と5310、どちらの製造・検査基準の方が厳しいですか?
Reply #22020-12-23
確かに、5310の検査項目は多くて厳格でもあるし、20Gの価格もL245より高い。自分で基準を比較してみたけど、大きな違いは見つからなかった:L
Reply #32020-12-23
6479の20#は9711のL245とほぼ同じみたいです
Reply #42020-12-24
GB9711の品質等級はB-1、GB5310の品質等級はA-1なので、5310の方が高い。
Reply #52020-12-24
しかし、価格はL245の方が20Gより少し高いです
Reply #62020-12-24
質量等級はどこで確認できますか?handshake
Reply #72020-12-25
GB20801「圧力配管規格 工業用配管」実施ガイド

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