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  • Material control from raw materials. Only after material testing, the raw materials can enter into our factory.  Any property mistakes would be rejected.
  • Sand hole inspection after raw materials are machining before polishing.
  • For valves, pressure testing and temperature testing is required for each valve.
  • After we get the finished products, we check for the surface roughness, thickness equality, roundness, size measurement and sand holes       again.
   The checking quantity is not less than 10% of total quantity.
  • Before shipment, we check for the quantity of each product in order to find out any missing quantity or wrong product.
  • Finally, we use strong package to prevent the products from any damages.
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