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API 5L standard steel pipes Specification 1.Standard: API 5L PSL1/PSL2 2.Grade: A,B,X42,X46,X52,X56,X60,X65,X70 3.Material: H40, J55, K55, N80, API GR.A, GR.B 4.Specification: 2-3/8”----10-3/4” (OD: ...