Acoustic shell for steam muffler, we recommend using stainless steel for manufacturing. The connecting pipes should be determined based on the steam operating conditions of the equipment. The three commonly used pipe materials are: 20G, 304 (0Cr18Ni9), 316 (1Cr18Ni9Ti/0Cr18Ni10Ti) stainless steel, and alloy steel pipes suitable for high temperature and high pressure.