The cooling water takes heat away in condenser. To reduce the waste, feeding water heater is applied after high pressure feeding water pump to raise high pressure feeding water temperature, increase economic performance, save coal source. Heat exchanger is its key component. Tubes for heat exchanger is generally in U type, п type and straight type.
п type and U type have the same function, generally applied to small capacity components.
Main steel grades
ASME SA-556M Cold Finished Seamless Carbon Tubes for Feed Water Heater
GB/T 24591-2009 Seamless Steel Tubes for High Pressure Feed Water Heater
The feed water heater tubes are long(max. length is 35M) and of small OD.(L/OD＞1000) . Adapted to working condition, the straightness and surface condition requirement is strict. Ring gauge of +0.02mm testing over the full length will be applied and rust or corrosion is not allowed.
Product operating environment
п type tube working temperature is over 350℃. Working pressure is 30Mpa or over. The tube inside bears pressure with water running speed of 3m/s. Under this condition, the tube high performance with performance period of over 15 years is requested