... competitive price the best quality Our company can produce Spiral heating tubes both for civil use and industrial use for ... , water machine, water boiler, dishwasher, etc.; For industial use heating tube are Widely used in mould ,various oil tank, acid ... for: 50 W-20 KWSurface treatment: all kinds of nickel plating, passivation, black, spraying. Non-standard, according to customers' requirements ...