• 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
• 2022-10-14Why do flanges need heat treatment?
• 2022-10-10Common types of stainless flanges
• 2022-10-08Relevant knowledge of flange gasket
• 2022-09-29Flange welding skills
• 2022-09-26What is a large diameter flange?
• 2022-09-21Application difference of flanges under petrochemical standard classification
• 2022-09-19Classification of flanges
• 2022-09-09What causes flange leakage
• 2022-09-02Large flange for wind power generation
• 2022-08-31Introduction of anchor flange
• 2022-08-29Introduction of surfacing welding
• 2022-08-25Knowledge of cast flanges and forged flanges
• 2022-08-10A105N blind flanges and weld neck flanges sent to Singapore shipyard
• 2022-07-13What factors affect the sealing performance of pressure vessel flanges?
• 2022-07-07Safe and efficient transportation enables you to receive the goods as soon as possible
• 2022-07-04Order for complete flanges in Russia
• 2022-06-30What is ZPS washer and HCS washer?
• 2022-06-27What is LPG gasket?
• 2022-06-22What is HPG gasket?
• 2022-06-16What is flange insulation kit?
• 2022-06-09API 6A standard blind flange with three coats of paint coating order follow up
• 2022-06-07API 6A standard blind flange with three coats of paint coating