Company News

• The tolerance of butt welding pipe fittings2016-08-11
• The advantage and the application of butt welding pipe fittings2016-08-09
• What’s butt welding pipe fittings?2016-08-05
• Haihao showed piping products in 21th Iran Oil & Gas show2016-06-22
• Haihao steel piping exporting department finish order production for Dubai client2016-06-14
• The 21th Iran oil show is started in Tehran2016-05-06