Company News
- BV test flanges and butt weld pipe fittings in Haihao Group2018-07-16
- Haihao Group will attend 11th International Tube Pipe Trade Fair2017-09-08
- ASTM A350 LF2 steel material2017-07-04
- How to use the ASTM A350 LF2 flanges?2017-06-12
- What is ASTM A350 LF2 flange?2017-06-09
- ASTM A105 Steel Grade Material2017-05-04
- The difference between ASTM A105 flange and A105N flange2017-05-03
- What is ASTM A105N flanges?2017-05-02
- Haihao is producing the forged steel blind flanges for Iran oil projects2017-04-19
- What is A105 steel flange?2017-04-18
- Forged steel blind flange and plate cut blind flange2017-04-17
- Haihao Group will attend the 17th Russia International Oil and Gas Equipment and Technology Exhibition2017-04-05
- Haihao Group is replacing natural gas furnace2017-03-21
- New Tube sheets for heat exchangers are going to finished in Hebei Haihao Flange Factory2017-03-01
- What is the difference between working,burst and proof test pressure2017-02-23
- Haihao Group finished the customized flange collar order as per clients requirement2017-01-29
- Haihao Factory is producing 180 degree bends for Petro pipeline2017-01-13
- Haihao Flange Factory finished high pressue and large size flanges on time2017-01-09
- 50D radius pipe bends used for steel structure finished in Haihao Group2017-01-04
- Hebei Haihao Group is working hard to finish orders before Chinese New Year2016-12-30