- The impact of haze on the steel industry in the north of China三 07, 2017
- New tube sheets for heat exchangers are going to finished in Hebei Haihao Group三 02, 2017
- What is the difference between working burst and proof test pressure二 23, 2017
- The EU imposed anti-dumping duties for stainless steel pipes and fittings from China二 16, 2017
- Haihao Group finished high quality customized flange collar products二 03, 2017
- Haihao Factory is producing 180 degree bends for Petro pipeline一 17, 2017
- Haihao Flange Factory finished high pressue and large size flanges on time一 09, 2017
- Haihao Group finished the 50D radius pipe bends used for steel structure一 04, 2017
- Hebei Haihao Group is working hard to finish orders before Chinese New Year十二 30, 2016
- Client inspect tube sheets quality and production in Hebei Haihao Group十二 27, 2016
- The tolerance about JIS B2220 flange products十二 23, 2016
- What are JIS B2220 flanges products十二 16, 2016
- The introduce of JIS B2220 products十二 13, 2016
- Canada will keep the anti dumping tax on tubular goods pup joints made in China十二 08, 2016
- How to reduce the risk of intergranular corrosion and test it十一 03, 2016
