Profile: Qingdao Hengli Precision Casting Co.,Ltd specializes in providing precision castings made of carbon steel, alloy steel, and stainless steel. Our products are widely used in machinery, ship building, rail transport, automobile, construction, hardware tools, medical equipment, food machinery and other fields. We also provide materials, structures, and casting solutions. Stainless steel pump fittings are made using silica sol techniques, water glass technique and mixed casting techniques. They are subjected to different types of surface treatments such as polishing, machining, plating, and heat treatments.