How to select high quality straight seam steel pipe?
Most people understand the advantages of the low cost and diverse size of straight seam steel pipe, and it is mainly used for conveying water, steam, gas, and other low-pressure flow gases. But what should be paid attention to when purchasing straight seam steel pipe, and how to close the hole? I don’t know much. With years of production of straight seam steel pipe master, the procurement of straight seam steel pipe gave the following three points of advice.
1. Thickness measurement of straight seam steel pipe
Straight seam steel pipe is a general term for the classification of high-frequency straight seam welded pipe, submerged arc welded straight seam steel pipe, large diameter thick wall steel pipe, etc. With the continuous development and progress of manufacturing technology, the production and processing process of steel pipe is also more and more times with The Times. At present, the thickness of straight seam steel pipe is increasing, which can directly replace some stainless steel pipe.
Normally, if the wall thickness of straight seam steel pipe is required to reach 10mm, the actual production of straight seam steel pipe will have upper and lower differences, such as 10.2mm or 9.75mm, which are normal deviations. But many unqualified manufacturers, in order to make the thickness of the straight seam steel pipe look thicker, will put the mouth end of the straight seam steel pipe with hammer shield look thicker, so when purchasing the straight seam steel pipe, you can use instruments to measure the thickness of the pipe wall, so that these tricks can be revealed.
2. The advantages and disadvantages of straight seam steel pipe selection
①Whether the material is uniform: the impurities of the raw material of the inferior straight seam steel pipe are more than uniform, and the material is not uniform, which leads to the small density of the steel, and the size and weight are seriously out of tolerance. And qualified straight seam steel pipe with high-quality material, uniform composition, cut surface smooth and neat.
②strength standard: inferior straight seam steel pipe is easy to crack or bend, under gravity and pressure difference, and high quality straight seam steel pipe has high strength, is not easy to damage, long service life.
③Whether there is an error in specification and weight: Because of the process or human problems, there will be a deviation in size and substandard weight of the inferior straight seam steel pipe, while the high-quality straight seam steel pipe has a small error, sufficient weight, and quantity, and meets the standard.
3. Straight seam steel pipe factory inspection
Straight seam steel pipe will be after several strict test before they go out, as one does not meet the factory standards, you need to pick out the unqualified straight seam steel pipe, and in the same batch of straight seam steel pipe, double the number of samples drawn to recheck, unqualified straight seam steel pipe, such as test does not conform to the standard again, do not order before delivery.
For example, the Cangzhou shenlong pipe has a physical and chemical test center and testing center. Each straight seam steel pipe needs to be tested by hydraulic test, ultrasonic detection, and other precision equipment, so as to ensure that the factory is qualified straight seam steel pipe.
For many straight seam steel pipe manufacturers to choose to meet the requirements, good quality straight seam steel pipe is not an easy thing, first of all, to determine their own straight seam steel pipe specifications, size, and process requirements, according to the scope of use to customize more fit straight seam steel pipe; Secondly, we should know more about the qualifications of the straight seam steel pipe manufacturers, and it is best to visit the factory more directly.
