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Thebutt welds joining together after forming the head

2015-12-03 16:45:04   Comment:0 Hits:
  According to the practical experience, the stress attenuation length is greater than 3 g, and not less than 100 mm). But refrigeration equipment is difficult to meet the requirements, has its particularity.

  Thebutt welds joining together after forming the head, should be 100% rays or ultrasonic testing, the qualified level with the equipment shell. Finally forming the same welding seam detection level, scale and equipment shell, high waste.Half spherical head Example: if the shell is 20% testing equipment, qualified III. The straight stitching and final weld, III qualify, welded joint coefficient is 0.85;

  If the equipment shell is 100% inspection, II qualification. The straight stitching and final weld is unqualified, II welding joint coefficient So straight stitching, although 100% inspection, qualified level, along with the housing.But must pay attention to the process manufacturing process:

  The correct way is: blanking (line) - small plate together into a big board - molding - nondestructive testingIf it's wrong to do testing before molding, guarantee the forming after the quality of the products. That is nondestructive testing refers to the nondestructive testing.

  We have adopted advanced production equipment and technologies to manufacture our carbon steel pipe fitting and steel elbow, which can not only improve product quality, but also save raw materials. Our products have high strength, good toughness and resistance to corrosion.

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