The stainless steel cap is also called the head. Use: cover wall pipe fittings, used for sealing pipe head. Complete specifications, types of diversity. R cap will avoid stitching, thinning, high stress.
When stitching, the direction of the weld is only allowed to be radial and circumferential. After the large cap may cancel this request. The distance of the splicing should be required to be greater than 3 Delta, and not less than 100mm (the heat affected zone of the welding is a high stress zone, and the chemical composition in this area will be burned. " So we should avoid the high stress zone, which is related to the thickness. According to practical experience, the stress attenuation length is greater than 3 Delta, and not less than 100mm). But it is very difficult to meet the requirements of the refrigeration equipment, and it has its particularity.