Galvanized pipe is popular in the iron and steel industry and deeply loved by everyone. However, when we purchase galvanized pipe, we must master the advantages and disadvantages of some products to help us choose the quality of steel when we purchase.
1. The fake galvanized pipe is easy to be scratched, because the equipment of the fake galvanized pipe manufacturer is simple and easy to produce burrs and scratch the steel surface. Deep scratches reduce the strength of the steel.
2. The poor galvanized pipe has no metallic luster and is light red or similar to pig iron.
3. The galvanized pipe under the horizontal bar is thin and low, which often causes dissatisfaction with filling. The reason is that in order to achieve a large negative tolerance, the pressure in the front of the finished product is too large, and the iron is too small, so the dissatisfaction with filling this hole occurs.
4. The cross-section of the fake galvanized pipe is elliptical, because in order to save materials, the pressure of the first two rollers of the finished product is too large, the strength of the pipe is greatly reduced, and it does not meet the standard size of the steel pipe.
5. The composition of galvanized pipe is even, the tonnage of cold cutting machine is high, the end face of cutting head is smooth and tidy, and the end face of cutting head often has flesh phenomenon due to poor materials of lower galvanized pipe, that is to say, it is uneven and has no metallic luster. And because inferior manufacturer product cuts head little, head and tail can appear big ear.
6. The poor galvanized pipe material contains impurities, the steel density is small, and the size is out of tolerance, so it can be weighed and checked without vernier caliper. Generally speaking, it is better to adjust the proportion, mainly considering the problems of cumulative error and probability theory.
The above is the relevant content introduced by Jinan galvanized pipe manufacturer. If you want to know more, please visit the website: http://www.jnxxjm.com