Pipe cap

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

Carbon steel : A234WPB, A420WPL6, WPHY52,WPHY60,WPJHY65,WPHY70 etc.

Diameter: DN15-DN2500

Wall thickness: SCH5-SCH160
Standard: ASME DIN JIS BS GB/T JB SH HG, as follows: GB/T12459-2017, GB/T13401-2017, ASME B16.9, SH3408, SH3409,HG/T21635,DL/T695,SY/T0510,DIN2617
Uses: water, beverages, beer, food, petrochemicals, nuclear power, machinery, medical equipment, fertilizers, shipbuilding, waterproofing, pipelines, etc.
Packing: wooden box, carton Avoid splicing at the r of the dish cap, which will reduce thinning and high stress. When splicing, the welding seam direction requirements are only allowed to be radial and circumferential. Large caps may remove this requirement in the future. The distance of splicing should be required, which is greater than 3δ and not less than 100mm (welding heat-affected zone is a high-stress zone, and the chemical composition in this zone will be burnt. Therefore, it is necessary to avoid the high-stress zone, which is related to thickness. .According to practical experience, the stress decay length is greater than 3δ and not less than 100mm). However, it is difficult for refrigeration equipment to meet this requirement and has its particularity.
Hemispherical Pipe cap
After splicing, the spliced ​​head and spliced ​​weld should be 100% ray or ultrasonic tested, and the qualification level will follow the equipment shell. The inspection level and ratio of the final formed weld seam are the same as the equipment shell, which is highly wasteful. Example: If the equipment shell is 20% tested, III is qualified. The bulkhead splicing weld and the final weld are also III qualified, and the welding joint coefficient is 0.85;
If the equipment housing is 100% tested, II is qualified. The bulkhead splicing weld and the final weld are also II qualified, and the welding joint coefficient is 1
Therefore, although the bulkhead splicing is 100% tested, the qualification level is different, and it follows the equipment shell.
But pay attention to the process manufacturing process:
The correct way is: blanking (scribing) – small plates are assembled into large plates – forming – non-destructive testing
If it is wrong to test before molding, the quality of the product after molding cannot be guaranteed. That is to say, non-destructive testing refers to the final non-destructive testing.