... JIS,EN,TP304,321,316L.... Appliance:high quality electric element,heater O.D.:from 6mm to 23 Features: 1) Production ... :Producing stainless steel welded pipes used for electric heating tubes for well over a dozen years, the company has ... the technical level. As a result, the steel pipes/tubes by company bring no worry to the customers in ... of extensibility. sell stainless steel pipes for electric heater