Stainless Steel Cap

Product details

Cap, pipe cap, casing) is also called the head, plug, LIDS, pipe cap, cocks, welding on the pipe end or installed outside the pipe thread to cover wall pipe fittings. Use closed pipeline, function the same as the tube wall.

Splice weld direction when asked to only allow is radial and ring. After large cap may cancel this request. Stitching distance should be requirements, for more than 3 g, and not less than 100 mm (welding heat affected zone is high stress zone, and there will be burning in the chemical composition of the area. So to avoid the high stress area, the area and thickness. According to 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. The forming of weld detection level, scale and equipment shell, high waste.

Example: if the shell is 20% testing equipment, qualified III. The straight stitching seam and the weld is qualified, III welded joint coefficient is 0.85;

If the equipment shell is 100% inspection, II qualification. The straight stitching seam and the weld is also qualified II, welding joint coefficient is 1

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 testing.

If 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.