What is the difference between the nozzles on containers and the pipes used for process pipelines?
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1. The nozzles on the container are forged; what is the difference from process pipes? Under what circumstances should forged fittings be chosen, and under what circumstances should pipes identical to those used in the process be selected? 2. The nozzles on the container are forged as one piece together with the flanges on the container; what is the difference between this and welding the nozzles to the flanges? When should overall forging be chosen, and when should welding be chosen?
It is generally directly related to the pressure vessel grade and the material contained within the vessel; for specific details, one can refer to the vessel regulations and the 150 standard
Forged fittings are generally used for hole opening and reinforcement purposes. Welding the flange and the pipe together forms a typical integral reinforcement structure. When thick-walled pipes are used for reinforcement, the flange and the pipe are welded together; the pipe can be forged or it can be a conventional seamless pipe.