New Materials for High Temperature Steam Piping

For non-corrosive fluids like steam, piping material used depends on the temperature of the fluid. Where a number of material grades may be considered oxidation resistance, freedom from graphitisation, fabricability, weldablllty and economic availability determine which material grade should have preference for use. In general, use of good quality carbon steel has been restricted to 400°C. For higher temperatures, certain additional properties viz. creep strength and rupture strength come into consideration and these make it imperative to use alloy steel. In this sense, temperatures above 400°C may be considered to be high temperature for piping materials.