Welding and Brazing of High Pressure Pipelines

Brazing is an ancient art. This paper is about of brazing of a high pressure pipeline that is working in 218 Atm hydraulic pressures. Ideal brazing process depends on proper selection of many important parameters such as type of filler metal، type of atmosphere (flux)، thermal cycle، type of heating process and …. Using a proper flux and thermal cycle to promote the brazing process is researched in this paper. Proper brazing temperature that was selected is 780ºC and proper thermal cycles that were used are 1- warming the furnace to 780ºC and putting the component in it for 30 Min and shut down the furnace. The component be cooled with furnace. 2- putting the component in furnace and turn it on. The component be warmed with furnace to 780ºC and shut down the furnace. The component be cooled with furnace. Three type of fluxes that can be used accordance with standards. And effect of them were investigated in brazing processes.