The national standards for galvanized steel pipes have a series of requirements for quality control. These requirements ensure that the quality and performance of galvanized steel pipes can meet specific engineering needs. The quality control requirements of the national standards for galvanized steel pipes are mainly reflected in the following aspects.
1. Appearance quality:
The surface of galvanized steel pipes should be flat and smooth, without defects such as cracks, pitting, oxide scale, oil stains, etc., and the inner and outer surfaces should be consistent. The coating should be uniform and free of obvious defects and bubbles.
2. Mechanical properties:
The mechanical properties of galvanized steel pipes should meet the requirements of national standards or industry standards, such as tensile strength, yield strength, elongation and other indicators to ensure that the steel pipes can withstand various external forces during use.
3. Coating quality:
The thickness of the galvanized layer should meet the standard requirements. Usually the average thickness of the galvanized layer should not be less than a certain value (the specific value varies according to different standards), and should have good adhesion and corrosion resistance. The coating should be uniform and continuous without peeling, missing plating, etc.
4. Dimensional deviation:
The dimensional deviation of galvanized steel pipes should comply with the requirements of national standards or industry standards, including the deviation range of outer diameter, wall thickness, length, etc., to ensure that the steel pipe matches other components or equipment during installation and use.
5. Physical properties:
The physical properties such as density and thermal expansion coefficient of galvanized steel pipes should also comply with relevant standards to ensure the stability and reliability of the steel pipes under various environmental conditions. In addition, the marking and packaging of galvanized steel pipes must also comply with relevant national standards. Steel pipes should use hot forging or oxidation printed marks. The packaging should comply with relevant national technical standards and should include product identification, length, weight and other information. The manner and content of marking and packaging must be clear, accurate, easily identifiable and traceable.
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
For more information about the product price, catalog and rolling mill inspection certificate,
please consult:Email:Sales@usisteels.com
