Mechanical Performance Test And Flattening Test Of Spiral Steel Pipe

Spiral steel pipe before the factory should do mechanical testing and flattening test and flaring test, and to meet the standard requirements. The quality inspection method of ssaw steel pipe is as follows:

Judging from the surface, that is, in appearance inspection. The appearance inspection of straight seam steel pipe welded joints is a simple and widely used inspection method. It is an important part of the inspection of finished products. It is mainly to find the defects on the surface of welds and the deviation in size. It is usually visually inspected and tested with tools such as standard templates, gauges, and magnifiers. If there is a flaw in the surface of the weld, there is a possibility of a flaw inside the weld.

The physical method test of lsaw steel pipe is then followed: The physical test method is a method that uses some physical phenomena for measurement or inspection. Inspection of defects in materials or workpieces is generally performed by means of non-destructive testing. Non-destructive testing includes ultrasonic testing, ray testing, penetrant testing, and magnetic testing.

The strength of the spiral steel pipe pressure vessel inspection: pressure vessel, in addition to the sealing test, but also the strength test. There are two kinds of pressure test and pressure test. They all test the tightness of welds in vessels and pipes that work under pressure. The air pressure test is more sensitive and quicker than the water pressure test. At the same time, the product after the test does not need to be drained. It is particularly suitable for products with difficult drainage. However, the test is more dangerous than the hydrostatic test. When carrying out tests, corresponding safety measures must be observed to prevent accidents during the test.

Test for compactness: For welding vessels that store liquids or gases, the non-dense weld defects, such as penetrating cracks, pores, slag inclusions, incomplete penetration, and loose structures, can be detected by the compactness test. Denseness test methods include: kerosene test, water load test, water test, etc.

Spiral steel pipe waste is divided into two kinds of internal waste and external waste. Internal waste refers to the scrap spiral steel pipe found in the foundry or in the foundry; external waste refers to the scrap found after the delivery of the spiral steel pipe, which is usually revealed during machining, heat treatment or use, resulting in far-reaching economic losses. Than within the waste. In order to reduce external waste, the batch production of spiral steel pipes is best sampled before the factory for experimental heat treatment and rough processing, as far as possible in the spiral steel pipe plant to find potential spiral steel pipe defects in order to take the necessary remedial instructions.