News
- The difference between the ellipsoidal head and pipe cap2019-03-20
- How to determining bolt grade-Grade 2,Grade 5,Grade 82019-03-19
- What is the difference between pipe bend and pipe elbow2019-03-18
- Pipe elbow vs pipe bend2019-03-15
- Advantages and disadvantages of cold drawing and hot rolling2019-03-13
- The difference between hot-rolled and cold-rolled seamless pipes2019-03-12
- How to distinguish hot rolled and cold rolled seamless steel pipe?2019-03-11
- 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