... seam & seamless) Qualification: ISO9001, API, CE, 90 degree elbow 1, Products: 90 Deg. LR Elbow, 90 Deg. SR Elbows, 180 Deg. LR Elbow ... , reducer, cap, flange, cross, nipple, socket fitting, expansion joint and other series products. Fittings are widely used in petroleum ... we are qualified and permitted to produce pressure pipeline unit for oil, chemical industry, and electricity group. Meanwhile, we ...