Method for increasing loading pressure of metal pipe for fuel injection in diesel engine

摘要

The method involves using a metal pipe having greater wall thickness in relation to diameter, with pressure tension applied on inner surface. The inside of the pipe is set under a lasting pressure tension. The inner surface of a bent high pressure metal pipe is subjected to a high fluid pressure, which exceeds the operating fluid pressure and the flow and extent point of the high pressure metal pipe. The fluid for applying pressure is water or a hydraulic work oil. The fluid pressure applied on the metal pipe is between 3000 and 6000 bar.