... seamless) Qualification: ISO9001, API, CE, 90 degree elbow 1, Products: 90 Deg. LR Elbow, 90 Deg. SR Elbows, 180 Deg. LR Elbow, 180 Deg. SR Elbow, 45 Deg. LR Elbow, 45 Deg. SR Elbow ... , production equipments and inspection systems, mainly manufacture elbow, tee, reducer, cap, flange, cross, ... are qualified and permitted to produce pressure pipeline unit for oil, chemical industry, and electricity group ...