Carbon steel pipe cap

cap is used to close pipes and ACTS as a pipe plug.

Convex pipe caps include hemispherical pipe caps, elliptic pipe caps, saucer pipe caps and spherical cap caps.From the point of view of stress, hemispherical cap in convex pipe cap is gradually bad, but from the point of manufacture difficulty, it is gradually easier to manufacture.

Stainless steel: 304 304L 316 316L 321 2520 310, 317, etc.

Size: DN15-48 ")

Wall thickness: SCH5 - SCH160

ASME DIN JIS BS GB/T JB SH HG, details as follows: GB/T12459-2017,GB/T13401-2017,ASME B16.9,SH3408,

SH3409, HG/T21635, DL/T695, SY/T0510, DIN2617

USES: water, beverage, beer, food, petrochemical, nuclear power, machinery, medical equipment, chemical fertilizer, shipbuilding, waterproof treatment, pipeline, etc

Packing: Wooden cases, cartons

Avoid splicing at the R of the disc cap, which will reduce the thickness and high stress.

When splicing, the weld direction should only be radial and annular.In the future, large caps may be removed from this requirement.The splicing distance should be greater than 3 and not less than 100mm (the welding heat affected area is a high stress area, and the chemical composition in this area will be burnt.So avoid areas of high stress, which are related to thickness.According to practical experience, the stress attenuation length is greater than 3 and not less than 100mm).But refrigeration equipment is difficult to achieve this requirement, has its particularity.

For the head formed after splicing, splicing weld shall be inspected by 100% ray or ultrasonic. The qualified level shall follow the equipment shell.The final welding seam detection level and proportion are the same as the equipment shell, which results in high waste.

Example: If the equipment housing is 20% tested, III is qualified.The splicing weld and the final weld are also qualified III, and the welding joint coefficient is 0.85.

If the equipment housing is 100% tested, II passes.The splicing weld and the final weld are also qualified for II, and the welding joint coefficient is 1

Therefore, although the head splicing is 100% tested, the qualified level is not the same, which goes with the equipment shell.

But pay attention to the manufacturing process:

The correct approach is: blanking (marking) - small plate into large plate - forming - non - destructive testing

If it is not right to test before molding, it cannot guarantee the quality of products after molding.In other words, nondestructive testing means the final nondestructive testing.