Choose to purchase stainless steel pipes 1. Identify whether the material "304" is stamped on the surface of the pipe, and ask for the quality certificate and quality assurance certificate of the stainless steel pipe manufacturer.
Choose to purchase stainless steel tube 2. Test with the acid reagent. After 30 seconds, material 304 does not change color, and material 201 turns black.
Choose to purchase stainless steel tubes 3. Check whether the outer surface of the stainless steel tube and the inner wall of the tube are bright and smooth, whether the thickness is uniform, or rough.
Choose to purchase stainless steel pipes 4. When purchasing stainless steel pipes, you should choose famous brand products above the provincial level that have been evaluated by the Bureau of Quality and Technical Supervision. Long-term use testimony and a good reputation among customers are the most direct and effective ways to purchase.