News
- The advantage and the application of butt welding pipe fittings2016-08-09
- What’s butt welding pipe fittings?2016-08-05
- Application and advantage of weld neck flange2016-07-21
- What is weld neck flange?2016-07-21
- What is butt welding?2016-06-23
- 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
- What is a tube sheet (tubesheet) for heat exchanger?2016-05-17
- The 21th Iran oil show is started in Tehran2016-05-06