Heat exchanger tube manufacturers purchase raw materials(plate&bar) from ZPSS, TISCO, BAOSTEEL,YonGXING and so on, we have stable supply and reliable quality, each chemical component,mechanicalproperty,dimensional tolerance all accord with ASTMand GB standard request.We recheck each Heat number raw material before into the factory, the inspection including:Chemical component analysis,mechanical test and intergranular corrosion test and so on. After our Testing Center issue the eligible report,the raw materials can been into the factory,then put on production. proceed production’s control and supervise,implement special inspection,casual inspection combination way, to ensure the products’ quality.All products inspection according to the standard request,including: mechanical property,nondestructive testing, dimensional tolerance, surface quality etc inspection items stipulated in the standard. We build exclusive area for raw materials,Intermediate products and finished products’ storage and stack, ensuring don’t chaos the all products. We general don’t have inventory,the production processing cycle is from 20-30 days, also can according to customer’s request to confirm the production plan.