News
- Brazil may extend anti-dumping duty on seamless steel line pipes from China2016-10-08
- USA antidumping duty orders on carbon steel butt weld pipe fittings from Brazil,China,Japan,Taiwan and Thailand2016-09-30
- Hebei Haihao Group attend Tube China 20162016-09-29
- Spectacle blind flanges,ring spacers and paddle flanges are finished in Haihao Group2016-09-28
- Haihao Group finished spectacle blind flange order2016-09-26
- Technical specification of spectacle blind flange2016-09-21
- How to use a spectacle blind flange?2016-09-19
- Types of spectacle flanges2016-09-18
- Advantage of pipe grooved ends joints2016-09-08
- The usage of pipe grooved ends joints2016-09-05
- The meaning and type of steel pipes2016-09-05
- What is a bevel end?2016-09-02
- The pipe end type of steel pipes and pipe fittings2016-08-24
- Hot induction bends under sand blasting in Haihao Group2016-08-22
- Advantages and disadvantages of socket weld pipe fittings2016-08-15
- What is socket weld pipe fitting?2016-08-12
- What is forged pipe fittings?2016-08-09
- Butt welding pipe fitting tolerance2016-08-03
- Application and advantage of butt welding pipe fittings2016-07-08
- What is butt welding pipe fitting?2016-07-05