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  Haihao Group’s commitment to pipeline product production and quality inspection

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  ASME B16.11 and EN10241 forged steel pipe fittings – Your ultimate solution

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  ANSI/ ASME B16.36 class 300 slip on orifice flange

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  ASTM A234 WP9 alloy steel pipe fittings

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  ASTM A234 WP91 Pipe Fittings

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  ASTM A234 WP5 Butt Weld Pipe Fittings

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  ASTM A105 Threaded Half Coupling BSPT 3000lb

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  ASTM alloy steel WP22 fittings

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  API 5L Gr.A PSL1 steel pipe

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  Threaded Outlet-Thredolet

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  Socket Weld Outlet-Sockolet

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  Welding Outlets-Weldolets

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  Pipe Unions

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  Pipe Nipple-TBE,TOE,PBE,Swage Nipple

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  Threaded Coupling-Full Coupling,Half Coupling

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  Socket Weld Coupling-Full Coupling,Half Coupling

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  Butt Welding Hot Induction Bends

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  Butt Welding Pipe Caps

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  Butt welding reducers-concentric reducers,eccentric reducers

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  Threaded Tee/Screwed Tee