... (seam & seamless) Qualification: ISO9001, API, CE, 90 degree elbow 1, Products: 90 Deg. LR Elbow, 90 Deg. SR Elbows, 180 Deg ... , cap, flange, cross, nipple, socket fitting, expansion joint and other series products. Fittings are widely used in petroleum, chemical industry, metallurgy, ships ...