Sand blasting process International mainly use what standards, as abrasive materials, sandblasting technology and so on have their own common standards, then, for the sand blasting process standards is what? The cleaning level of the sand blasting process provides for the cleanliness of the process parts. Sand blasting process There are two common standards: the United States developed the "sspc-" in 85, and the second is the "sa-", developed by Sweden in 76, which is divided into four levels: SA1, SA2, Sa2.5 and SA3, which are common international standards, as detailed below. SA1 level" is equivalent to the United States SSPC-SP7 class. The use of general simple manual brush removal, sand cloth grinding method, which is the four cleanliness of the lowest level, the protection of the coating is only slightly better than the workpiece not used for treatment. SA1 level treatment of technical standards: the surface of the workpiece should not be visible oil, grease, residual oxidation skin, rust spots, and residual paint and other dirt. The Sa1 class is also called manual brushing to remove the cleanup level (or sweep level) Sa2 level" is equivalent to the United States SSPC-SP6 class. The use of sand blasting process cleaning method, which is the lowest level of sand blasting process treatment, that is, the general requirements, but for the protection of the coating than manual brush cleaning to improve a lot. Technical standards for SA2 level treatment: the surface of the workpiece should not be visible greasy, dirt, oxidized skin, rust, paint, oxides, corrosion, and other foreign substances (except defects), but the defect is limited to no more than 33% of the surface per square metre, can include a slight shadow, a small amount of minor decolorization due If there is a dent in the original surface of the workpiece, the slight rust and paint will remain at the bottom of the dent. The Sa2 class is also called the Commodity cleanup level (or industrial grade). "Sa2.5 class" is commonly used in industry and is sufficient as a level of acceptance technical requirements and standards. The Sa2.5 class is also called the near white cleanup level (near white or out of white class). Technical standard for Sa2.5 level treatment: SA2 requires the first half of the same, but the defect is limited to no more than 5% of the surface per square metre, may include a slight shadow, a small amount due to defects, rust caused by minor decolorization, oxidation skin and paint defects. The "SA3 level" class is equivalent to the American SSPC-SP5 level and is the highest processing level in industry, also known as the White cleanup level (or white level). The "SA3 level" class is equivalent to the American SSPC-SP5 level and is the highest processing level in industry, also known as the White cleanup level (or white level). SA3 level Processing technical standards: the same as the Sa2.5 level but 5% of the shadows, defects, rust and so on have to exist. Sand blasting process Raw material sandblasting process: gold and silver coin casting technical terms. That is, in the production of gold and silver coins with various sizes of different types of metal sand particles, the pattern part of the spray into a very detailed scrub surface, in the production of gold and silver coins, the pattern part of the appearance of a beautiful silver, increased the sense of stereoscopic and hierarchical.