News

1, The size standards of JIS standard pipes and GB/T standard pipes are different

There is a significant difference between the JIS standard and the GB/T standard in terms of pipe size standards. For example, the GB/T standard steel pipes are divided into 6 series, and each series has different corresponding outer diameters, wall thicknesses, and lengths. JIS standard steel pipes are divided into 31 types, each with different outer diameter, wall thickness, and length standards. In addition, the precision requirement for JIS standard pipes is relatively high, with an error of less than 0.05mm, while the error requirement for Chinese standard pipes is relatively low.

2, Different surface treatment methods

JIS standard steel pipes are relatively more meticulous in surface treatment, usually requiring not only hot-dip galvanizing, but also chemical treatment such as acid pickling and solution impregnation to improve their corrosion resistance and aesthetics. GB/T standard pipes are relatively simple, usually only requiring hot-dip galvanizing to improve corrosion resistance.

3, Different uses

JIS standard pipes are commonly used in industries such as precision machinery and automotive manufacturing due to their high precision and meticulous surface treatment. GB/T standard pipes are widely used in fields such as construction, steel structures, and bridges.

In summary, there are some differences between JIS standard pipes and GB/T standard pipes in terms of size standards, surface treatment, and usage. The choice of pipe should be determined based on specific needs and application scenarios.