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  Haihao Group called attention to the safety risks of ship pipeline systems

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  ASTM A240 316/316L Paddle Spacer used in Arctic LNG2 Project

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  ASTM A350 Gr.LF2 Cl.1 ASME B16.5 C1 weld neck flange applied to Arctic LNG2 project

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  Quality inspection for ASTM A182 316/316L, ASTM A350 Gr.LF2 weld neck flanegs and blind flanges

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  ASTM A182 316/316L, ASTM A350 Gr.LF2 weld neck flanges and blind flanges ready for delivery

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  Saudi customer added AWWA C207 A105 slip on flange orders

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  Characteristics of epoxy powder coatings

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  Reasons for corrosion of petrochemical pipeline

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  Bolt type for flange

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  Types of blind flange

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  Types of flange gaskets

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  Specific technical requirements for wind power flange

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  Haihao provides one-stop service for customers

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  Celebrate the 40th anniversary of Haihao Group!

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  Flange shipment ordered by Russian customers

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  Difficulties in offshore wind power operation and maintenance

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  Haihao Wind Power Flange Assists Kubuqi Base Project

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  Looking back at 2022, gathering strength, looking forward to 2023, forge ahead！

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  Delivery of large diameter flanges to Singapore customers

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  The main hull of the first ultra deep water scientific research drilling ship is connected

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  Participate the SSGC tender of pipe fittings & flanges

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  Customer orders tube sheet flange

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  PetroChina was rated as one of the top ten outstanding cases of Chinese brands going to sea

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  2022 China Marine Economy Expo opens in Shenzhen