... ; investment casting; water glass; lost wax;Material:Carbon steel, alloy steel, stainless steelStandards:ASTM, AISI, BS, DIN, JIS, NFCapacity: ... Casting no internal shrinkage, external shrinkage defects; rich experience in both domestic and international production; professional technicians and advanced ... or carton) or as customer's required Pipe coupling,high quality pipe,stainless steel pipes