Products
- The main differences between hot rolling and cold drawn steel pipes2019-03-08
- Bolt grades and property classes2019-03-07
- The difference between bolts,screws and stud2019-03-06
- Introduction to bolts,screws and studs2019-03-05
- Introduction and application of anchor flange2019-03-04
- Haihao Group takes samples from ASTM A350 LF2 flanges and process test2018-10-23
- Production limitation lead to the crazily rising of pipe fittings and flanges price2018-08-29
- Haihao introduction of new environmental protection piping equipment2018-08-29
- OD 3000mm above big size pipe fittings and flanges supply and assembly2018-08-28
- Hebei Haihao Group will attend the 8th Tube China2018-08-28
- What are threaded/screwed flanges?2018-08-27
- Haihao Group pipe fittings and flanges used for power plant restoration project in Serbia2018-08-17
- Van Leeuwen in Middle East come to visit us2018-08-07
- HRSG Project of SamsungGroup in Qatar2018-08-07
- Haihao Group attended the 4th INDONESIA TUBE & PIPE EXPO 20182018-07-27
- Haihao Group offer excellent piping solutions for sewage treatment project in Iraq2018-07-25
- Cooperation with Van Leeuwen for Egypt Project2018-07-23
- 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