• 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
• What is a weld neck flange?2021-11-05
• What is a lap joint flange/loose flange?2021-11-05
• The 21th Iran oil show is started in Tehran2021-11-05
• Hebei Haihao Group is looking for translator for Iran Oil Show2021-11-05
• Haihao Group will attend IRAN Oil Show 20162021-11-05
• The information for coated and insulated steel pipe products2021-11-05