All the product process the ISO9001:2000 strictly Fittings are widely used in petroleum, chemical industry, metallurgy, ships, paper- ... Deg. SR Elbows, 180 Deg. LR Elbow,180 Deg. SR Elbow, 45 Deg. LR Elbow, 45 Deg. SR Elbow 2, Thickness: SCH20, SGP, STD ... /BSTPCertificate: ISO ,API , Delivery time: 20days 45 Deg Carbon steel elbow(LR)