How to know whether the pipe quality is up to standard

Straight seam welded steel pipe is an important basic material for industrial production and its quality directly affects many basic construction projects in our country. For the price of welded steel tube, it involves more complicated process and inspection, so its price is much higher both for round steel pipe and square steel pipe compared with common steel tubes such as black steel pipe. For customers, straight seam welded steel pipe is mainly used for the transmission of fluid and liquid. Besides, it can also used as a guardrail tube as well as a scaffold support. However, no matter its application is, the quality requirements are relatively high. Actually, poor quality may lead to a potential accident, so we should pay more attention on the pipe quality.

Although, there are many factors that can affect steel pipe price, large-scale manufacturing enterprises in our country tend to concentrate on steel pipe manufacturer advantages such as bulk purchase of raw material, optimization of process technology as well as keeping price stable as a whole. Now we will introduce some tactics learned from large manufacturing enterprises how to strictly control the pipe quality before finished and how to distinguish pipe quality standard.

First of all, we can use the scientific method of magnetic flaw detection to check whether there are defects inside the straight seam welded steel pipe or in the cold-formed hollow sections. The magnetic test is a relatively simple physical test method which use magnetic powder in the lines of magnetic force under the action of moving slightly to distinguish whether the straight seam welded pipe has internal flaws and defects. In the event of drawbacks, magnetic powder will have leakage phenomenon. Then technical personnel will find out the defects of welded pipe immediately and repair it timely.

Another efficient method is penetration test which is to find the surface and internal defects of the straight seam welded steel pipe by using the permeable physical properties of some chemical test liquids. No matter it is a stain test or a fluorescence test, it can be used to check the defects of magnetic iron and non-magnetic iron welded pipe material. Of course, steel pipe manufacturers can also adopt physical ray method. Professional personnel who make straight welded steel pipes can easily find the defect points and repair them timely according to the angle and intensify of the ray refection. The above three methods can be used for scientific defection.