... TIG welding is used to produce high-quality stainless steel pipes. ASTM A249 is a standard about Welded Austenitic Stainless ... Steel BoilerSuperheater, Heat-In stainless steel pipes, tubes and tubings industry, TIG welded system is widely ... steel Co., Ltd., we can supply TIG welded stainless steel pipes to meeting the different customers' requirement. ASTM A249 TIG ...