• 2023-03-31Haihao Group called attention to the safety risks of ship pipeline systems
• 2023-03-29ASTM A240 316/316L Paddle Spacer used in Arctic LNG2 Project
• 2023-03-28ASTM A350 Gr.LF2 Cl.1 ASME B16.5 C1 weld neck flange applied to Arctic LNG2 project
• 2023-03-27Quality inspection for ASTM A182 316/316L, ASTM A350 Gr.LF2 weld neck flanegs and blind flanges
• 2023-03-24ASTM A182 316/316L, ASTM A350 Gr.LF2 weld neck flanges and blind flanges ready for delivery
• 2023-03-23Saudi customer added AWWA C207 A105 slip on flange orders
• 2023-03-15Characteristics of epoxy powder coatings
• 2023-03-08Reasons for corrosion of petrochemical pipeline
• 2023-02-28Bolt type for flange
• 2023-02-28Types of blind flange
• 2023-02-21Types of flange gaskets
• 2023-02-13Haihao provides one-stop service for customers
• 2023-02-08Celebrate the 40th anniversary of Haihao Group!
• 2023-01-12Flange shipment ordered by Russian customers
• 2023-01-09Difficulties in offshore wind power operation and maintenance
• 2023-01-04Haihao Wind Power Flange Assists Kubuqi Base Project
• 2022-12-31Looking back at 2022, gathering strength, looking forward to 2023, forge ahead！
• 2022-12-29Delivery of large diameter flanges to Singapore customers
• 2022-12-22The main hull of the first ultra deep water scientific research drilling ship is connected
• 2022-12-13Participate the SSGC tender of pipe fittings & flanges
• 2022-12-05Customer orders tube sheet flange
• 2022-11-30PetroChina was rated as one of the top ten outstanding cases of Chinese brands going to sea
• 2022-11-242022 China Marine Economy Expo opens in Shenzhen
• 2022-11-23Haihao Group Brings Pipeline Products to the 2022 China Marine Economy Expo
• 2022-11-21Classification of alloy flanges
• 2022-11-15Haihao Group was invited to attend the 2022 SSNAME Academic Conference
• 2022-11-07Differences between flat welding flange and butt welding flange
• 2022-11-03Send flange samples to American customers
• 2022-11-02Haihao Group will attend the 2022 China Marine Economic Expo in November
• 2022-11-02Plant upgrading in progress