This standard specifies the manufacturing, inspection and acceptance of high-frequency resistance welded spiral finned tubes made of base tubes and steel strips. This standard applies to steel high-frequency resistance welded spiral fin tubes in petrochemical, machinery, electric power, metallurgy, light industry, food and other industries.
HG/T 3181-2009 Referenced Document
GB 13296 Seamless stainless steel tubes for boiler and heat exchanger*, 2013-09-18 Update