• Spectacle blind flanges,Ring Spacers and paddle flanges are finished in Haihao Group2021-11-09
• Hebei Haihao Group finished supplement flange order2021-11-09
• Technical specification of spectacle blind flange2021-11-09
• How to use a spectacle blind flange?2021-11-09
• Types of spectacle flanges2021-11-09
• The advantage of pipe grooved ends joints2021-11-09
• The usage of pipe grooved ends joints2021-11-09
• What’s a bevel end?2021-11-09
• Pipes and fittings ends in piping system joint2021-11-09
• The pipe end type of steel pipe and pipe fittings2021-11-09
• Advantages and Disadvantages of Socket Weld Pipe Fittings2021-11-09
• What Is Socket Weld Pipe Fittings?2021-11-09
• What Is Forged Pipe Fittings?2021-11-09
• The tolerance of butt welding pipe fittings2021-11-09
• The application and advantage of butt welding pipe fittings2021-11-05
• What is butt welding pipe fittings?2021-11-05
• What’s butt welding mean?2021-11-05
• What is Lap Joint Flange?2021-11-05
• Haihao showed piping products in 21th Iran Oil & Gas show2021-11-05
• Haihao steel piping exporting department finish order production for Dubai client.2021-11-05