Introduction to weld requirements of pipe cap in s

Introduction to weld requirements of pipe cap in splicing process  

The weld direction of the pipe cap is only allowed to be radial and circumferential.  This requirement may be removed for larger caps in the future.  The splicing distance should be greater than 3δ and not less than 100mm (the weld heat affected zone is a high stress zone, and there will be burning loss of chemical composition in this zone.  So avoid areas of high stress, which are related to thickness.  According to practical experience, the stress attenuation length is greater than 3δ and not less than 100mm).  But refrigeration equipment is difficult to meet this requirement, has its particularity.  

For the head formed after splicing of the pipe cap, the splicing weld shall be tested by 99% ray or ultrasonic, and the qualified level shall follow the equipment shell.  The final forming welding joint detection level, proportion and equipment shell is the same, high waste.  Example: if the equipment housing is 20% tested, III qualified.  The bulkhead splicing weld and the final weld are also III qualified, with a welded joint coefficient of 0.85  

Type analysis of pipe cap: the form of blind plate is similar, except that the blind plate can be detachable and blocked, while the welded pipe cap can not be detachable.  The pipe cap includes convex pipe cap, cone shell, reducer section, flat cover and the design of tightening mouth.  

Convex pipe cap includes: hemispherical pipe cap, oval pipe cap, disc pipe cap and dome pipe cap.  From the point of view of force, convex pipe cap is gradually bad from the hemispherical pipe cap, but from the point of view of manufacturing difficulty, gradually good manufacturing.  

The company mainly produces complete models of pipe cap products, who order the company pipe cap pipe fittings customers, will be in the company at a low price to order excellent pipe cap products.