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Spiral steel pipe standards and acceptance after the rework is allowed

According to the spiral steel pipe quality inspection results, the spiral steel pipe is usually divided into three categories: qualified products, reworked products and scrap. Qualified products refer to the appearance and quality of the quality of the connotation of the spiral steel pipe to meet the relevant specifications or delivery inspection skills; reworked products refer to the appearance and quality of the connotation of the quality does not fully meet the norms and inspection of the body,

steel bars manufacturers

but promised to repair, after repair can reach the norms and inspection conditions of spiral steel pipe; scrap refers to the appearance and quality of the quality of the connotation of the failure, does not agree to repair or after repair still can not meet the norms and inspection conditions of spiral steel pipe.

Spiral steel pipe quality inspection methods are as follows: physical methods of inspection: physical methods of inspection is the use of some physical phenomena to determine or check the method. Material or workpiece internal shortcomings of the view, is generally the choice of nondestructive testing methods. Non-destructive testing are ultrasonic flaw detection, radiation flaw detection, immersion testing, magnetic flaw detection, etc.

Judging from the appearance, that is, in the appearance of the inspection. Appearance inspection of welded joints is a simple and widely used inspection method, is an important element of product inspection, mainly to find the shortcomings in the appearance of the weld and scale errors. Generally through the naked eye investigation, with the standard sample, gauge and magnifying glass and other things to check. If the exterior of the weld shows flaws, the internal weld may have flaws.

Fineness check: storage of liquid or gas welding containers, the weld is not fine flaws, such as cracks, pores, slag, not weld through and loose arrangements, etc., can be found in the fineness test. Fineness check methods are: kerosene test, water test, water test, etc.
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