heating exchanger pipe: 1)ISO9001,PED 2)DIRECT MANUFACTURER 3)Top quality ... specializes in the production of stainless steel industrial pipe, heating exchanger pipe and polished pipe. It can also process the stainless steel nipples ... the fields if water supply and drainage, foodstuff, medicine, boiler, heating exchanger, petroleum, petrochemical, fiber, papermaking, shipbuilding, electronic and ...