... GB etcCertificatesISO 9001:2000, QS-9000PurposeOur products are widely used in oil, electricity, chemical industry, light industry, metallurgy, shipbuilding, urban ... and other industries.Surface TreatmentShot blasted, rust-proof black oil or per customers' requirementWe are good at producing ... big size and thick wall pipe fittings. Specialized in elbow, bend, tee, cross, flange, reducer and ...