Galvanized steel pipe is one of types of galvanized products, and the product is very complicated. If customers do not know galvanized steel pipes well, there will be many problems when buy. Therefore, it is nessary to know basic knowledge and skills of galvanized steel pipe. Pay attention to the following points when buying galvanized steel pipe:

1. Appearance: There are regulations of industry standards on appearance quality requirements, especially in terms of delamination, scarring, cracks, etc. The regulations are specific, and there are also regulations for geometric deviations in the implementation standards, such as Curvature, side width, side thickness, top angle number, theoretical quality and other items have strict regulations, which can be well reflected in appearance, and are also a very effective basis for distinguishing the quality of galvanized steel pipes.

2. Chemical composition discrimination: It is scientific to distinguish by chemical composition, because the chemical composition of galvanized steel pipe is the general structure rolled steel series, and the main indicators are C, MN, P, S four inspection standards. At the same time, there are certain differences in chemical content according to the characteristics of different grades, for example: C<0.22%, Mn: 0.30—0.65%, P<0.060%, S<0.060%. For these chemical components, we can use GB223, JISG1211-1215, BS1837 and other methods to detect, Wuxi 201 galvanized steel pipe, so as to ensure the quality of galvanized steel pipe.

3. Price estimation: To know the market situation of various steel grades. If the price of the same steel grade in big difference, you should consider if there is a problem in quality.

Before packing the galvanized steel pipe, the factory shall provide the quality inspection report.