Stainless steel fittings are classified by process or other methods for casting defects: Casting defects are determined after inspection, so defects can be classified by inspection methods: visual inspection and internal inspection. Visual inspection is sometimes also called visual inspection. For instance, defects on the surface of castings such as adhered sand, sand inclusion, and cold shuts can be directly identified. For defects beneath the surface of castings, such as subcutaneous pores, a pointed small hammer is often used for inspection by tapping. Visual inspection does not reject the use of instruments and tools. For instance, the shape, size and weight deviation of castings are measured by drawing lines and measuring dimensions. Internal inspection mainly detects internal holes and cracks through destructive and non-destructive methods. Internal inspection requires certain means and specialized equipment(Hydraulic testing machines or non-destructive testing devices, etc)It depends on the conditions of the inspection department.

　　External defects and internal defects can be distinguished by inspection methods. The former includes dimensional defects, while the latter also includes material defects. Among dimensional defects, there are not only unqualified castings in terms of size, but also misalignment, deformation, succulent and under-pouring of castings, etc. External defects refer to cold shuts, cracks, pores, depressions and sand sticking that occur on the surface of castings when their shape, size and weight are intact. Internal defects include shrinkage porosity, internal cracks, pores and uneven material (hard spots, oxides and inclusions), etc. Poor physical and chemical properties, inability to withstand pressure, and unqualified mechanical properties of castings all fall under material defects.
Foshan Weilihuang Trading Co., Ltd. is a leading manufacturer specializing in the production and sales of international and domestic stainless steel hardware accessories and its own brands. The company is located at Tianjinli Hardware Accessories Center, Lanshi 2nd Road, Chancheng District, Foshan City, Guangdong Province8seat10-12The number (i.e., the main entrance of the market) has an abundant supply of goods, a complete range of varieties, wide coverage, favorable prices, and stable and superior quality!

　　The company uses high-quality stainless steel and exquisite craftsmanship to ensure there are no weld marks at the interfaces. Its products feature novel designs, elegant craftsmanship, and long-lasting durability. The company has always adhered to the principle of quality first and reputation first. It is equipped with mature production facilities and has strong technical strength, thus ensuring the quality of its products. The company is willing to make unremitting efforts to join hands with our customers to create a win-win situation and provide high-quality products for our partners.