- Haihao Group takes samples from ASTM A350 LF2 flanges and process test十 23, 2018
- Production limitation lead to the crazily rising of pipe fittings and flanges price八 29, 2018
- Haihao introduction of new environmental protection piping equipment八 29, 2018
- OD 3000mm above big size pipe fittings and flanges supply and assembly八 28, 2018
- Hebei Haihao Group will attend the 8th Tube China八 28, 2018
- What are threaded/screwed flanges?八 27, 2018
- Haihao Group pipe fittings and flanges used for power plant restoration project in Serbia八 17, 2018
- Van Leeuwen in Middle East come to visit us八 07, 2018
- HRSG Project of SamsungGroup in Qatar八 07, 2018
- Haihao Group attended the 4th INDONESIA TUBE & PIPE EXPO 2018七 27, 2018
- Haihao Group offer excellent piping solutions for sewage treatment project in Iraq七 25, 2018
- Cooperation with Van Leeuwen for Egypt Project七 23, 2018
- What is elbow and bend?七 16, 2018
- The difference between pipe bend and elbow七 16, 2018
- BV test butt weld fittings and flanges in Haihao Group七 16, 2018
