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Beijing Longze Xinyuan Electrical and Mechanical Equipment Co., Ltd. is a professional manufacturer established in 2000. Our products include: elbow, bend, reducer, flange, cap end, tee, cross, coupling and nipple ; and the material include:   Carbon steel pipe fittings : A234WPA, A234WPB, A234WPC, Alloy steel pipe fittings : A234WP1, A234WP5, A234WP91, A234WP11, A234WP22, A420WPL3, A420 WPL6, A860WPHY42, A860WPHY52, A860WPHY60, A860WPHY65, A860WPHY70, A694 GR.F65, A694G......