1size:1/2"--48" 2.Material:Carbon Steel,alloy steel,A234 WPB,WPC ... the ISO 9001 A106 steel ERW pipe fitting1.material:a234 wpb,a105,a106,a532.Size:1/4- ... and GB standards. 2.WH:sch 10---SCH160, XXS3.material;carbon steel, stainless steel, alloy steel4.the price : ... , CO, Quality certification, SQC Certifications.7.tolerances for fitting:Acc to GB12459 8.Appication:oil, gas, water, industrial9.packing ...