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1. Check whether the steel composition is uniform. Due to inferior seamless steel pipes, there are many impurities in the pipes and the steel density is low. Once we find that the composition of the pipe is disordered from the section of the pipe, then this must be a qualified seamless steel pipe.
2. It is a poor-quality seamless steel pipe, and the size deviation is very serious. Therefore, we can use a vernier caliper to check the size of each part of the steel pipe to see if it meets the standards for seamless steel pipes. If there is no vernier caliper, we can check the steel pipe.
3. The inner diameter of inferior seamless steel pipes fluctuates greatly, while the inner diameter of qualified seamless steel pipes is stable.
How to inspect qualified seamless steel pipes
A steel pipe with a seamless surface made of a single piece of metal is called a seamless steel pipe. Commonly used seamless steel pipes are ASTM A106 seamless steel pipe, ASTM A53 seamless steel pipe, API 5CT seamless steel pipe, etc. As we all know, the application range of seamless steel pipes is increasing, so the purchase volume of seamless steel pipes is also increasing. Astonishing! So how to check whether the seamless steel pipe is qualified? What tests need to be done before leaving the factory?
What tests do seamless steel pipes need to do before leaving the factory?
1. The delivery status of seamless steel pipes is generally hot rolling and delivered after heat treatment. After passing the quality inspection, the hot-rolled seamless steel pipe must be strictly hand-selected by the staff. We strive for perfection every step of the way.
2. After the quality inspection, the surface is oiled, and then several cold drawing tests are carried out, and the piercing test is carried out after hot rolling.
3. After straightening, it is transported by the conveyor to the flaw detector for flaw detection experiment. This step is also essential, followed by labeling, sorting specifications, and storage. Through this series of steps, the quality of seamless steel pipes before leaving the factory can be better guaranteed.
Article source: https://article-realm.com/article/Finance/39137-What-tests-do-seamless-steel-pipes-need-to-do-before-leaving-the-factory.html
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