For low and medium pressure boiler (working pressure is not greater than 5.88Mpa, working temperature 450 c) heating surface pipes; for high pressure boilers (working pressure above 9.8Mpa, operating temperatures between 450 ~650 ) heating surface pipes, economizer, superheater, reheater, pipe for petrochemical industry, etc. http://www.sellsteels.com/steel-pipe/SA213.html
