ANSI Stainless Welded pipes longitudinally into boiling tubes are manufactured with stainless steel sheet metal. And other non-standard pipes made of different materials than are possible in special applications. Pipes diameter of the pipeline will be installed, the type of fluid passing through the maximum that may occur in the pipeline. Pressure value may consist in the pipeline will max. Temperature value, the pipe is the most important design requirements. No. wanted the most common are stainless steel welded pipes ANSI Stainless Steel Welded Pipes.