... tube for heat exchanger 1).Bare tube:carbon steel tube,stainless steel tube,copper tube 1.Base tube Material: 304,304L,316,316L stainless steel tube,carbon steel tube,copper tube ... . Applied range of products: boiler economizer, power plant waste heat boiler, petrochemical engineering3. Our products are used widely on domestic ... :JB/T6512-92 DG1020-97 aluminum fin base boiler tube for heat exchanger