Company News
- What is the difference between working,burst and proof test pressure2017-02-23
- Haihao Group finished the customized flange collar order as per clients requirement2017-01-29
- Haihao Factory is producing 180 degree bends for Petro pipeline2017-01-13
- Haihao Flange Factory finished high pressue and large size flanges on time2017-01-09
- 50D radius pipe bends used for steel structure finished in Haihao Group2017-01-04
- Hebei Haihao Group is working hard to finish orders before Chinese New Year2016-12-30
- Client Inspect Tube Sheets Quality and Production In Haihao Group2016-12-27
- The tolerance for JIS B2220 flange products2016-12-23
- The introduce about JIS B2220 flanges products2016-12-15
- What are JIS B2220 Products?2016-12-13
- ABS Arrange Annual Verification for Type Approval Certificate for Hebei Haihao Group2016-12-05
- ABS Inspector visited Haihao Group and did the inspection2016-12-02
- Hebei Haihao Flange Factory finished the custom flanges order2016-11-22
- Information about ASTM A694 Flanges2016-11-07
- How to reduce the risk of intergranular corrosion and test it2016-11-03
- The standards and methods for intergranular corrosion test2016-11-01
- What is intergranular corrosion in metal material?2016-10-31
- SGS carried out Intergranular Corrosion Test to stainless steel elbows of Haihao Factory2016-10-28
- Hebei Haihao technical department communicates with JOINTECH Pakistan2016-10-27
- Hebei Haihao Group finished the IBR certificated steel pipe fittings2016-10-26