Company News
- What is elbow and bend?2018-07-16
- The difference between pipe bend and elbow2018-07-16
- BV test butt weld fittings and flanges in Haihao Group2018-07-16
- Packing type of flange,pipe fitting and steel pipe2018-07-16
- Impact test of EN10204 for German order in Haihao Group2018-06-15
- BV witness Haihao Group process EN10204 type 3.2 certificate testing for TOP 500 companies2018-06-12
- Mechanical properties test by BV in Haihao Group2018-06-05
- What is chemical composition test?2018-05-29
- How to use ASTM A403 WP321H pipe fittings?2018-01-31
- What are ASTM A403 WP321H pipe fittings?2017-12-05
- How to use ASTM A403 WP321 pipe fittings?2017-11-27
- What are ASTM A403 WP321 pipe fittings?2017-11-17
- What are ASTM A403 WP304H pipe fittings?2017-09-20
- How to use ASTM A403 WP304 pipe fittings?2017-09-18
- What are ASTM A403 WP304 pipe fittings?2017-09-13
- Haihao Group will attend International Tube Pipe Trade Fair 20172017-09-11
- How to use ASTM A403 WP304L pipe fittings?2017-08-24
- What are ASTM A403 WP304L pipe fittings?2017-08-23
- How to use ASTM A234 WP91 pipe fittings?2017-08-17
- What are ASTM A234 WP91 pipe fittings?2017-08-16