Pay Attention to the New Standard of steel pipe

GB / T 3091 welded steel pipe for low pressure liquid transportation (2015 Standard Edition) has been approved and issued by the Standardization Administration of the Republic of China. The new edition took effect on June 1, 2016, and the old edition of GB / T 3091-2008 was officially invalid.


New important clauses of national standard:


1. Minimum requirements for weight of zinc coating

This is the first time in a new national standard that a minimum weight of zinc coating is required. According to the old consulting standard, the mandatory standard requirement for the total weight per unit area of galvanized layer shall not be less than 300g / m2. As a result, the average life of the pipeline is extended to 30%.

2. pipe ends

Pipes with an outside diameter greater than 114.3 mm (less than 4 inches) have a mechanical end and the end of the pipe is free of burrs.

3. Repair welding defects

After the revision, the defect repair of the pipeline with an outer diameter of more than 219.1mm has become that the longitudinal welded steel pipe is not allowed to be repaired



If you want to learn more about product information, click here:


1: ERW steel pipe

2: LSAW steel pipe

3: SSAW steel pipe

4: Carbon steel pipe

5: Stainless steel pipe

6: Seamless steel pipe

7: Alloy steel pipe