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PRESSURE LEVEL I.D. O.D. W.P. P.P. Min.B.P. Min.B.R. psi in. mm psi psi psi mm 1500 A级Grade A 2 68 1500 2250 3750 800 2 1/2 84 1500 2250 3750 800 2000 Grade B 2 68 2000 3000 5000 800 2 1/2 84 2000 ...