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4 Inch 6 Inch 8 Inch 304 304L 316 316L Sanitary Welded Seamless Tube Stainless S
pipe
| 1. Superior Surface Finish: | The traditional annealing :Open furnace---Oxygen atmosphere---form Scale, tarnish the material,For more than 12m tubes this method is hard to clean inner surface. A special bright annealing:Closed furnace---Intert atmosphere use noble gases(Nitrogen and argon)Preventing Oxygen to contact with marterial ---Surface finish is clean,bright and precision,which is an excellent starting point for further process,like electro-polishing and mechanical polishing. For more than 12m tubes,this method is much cleaner smoother on both inner and outer surface. |
| 2. Better Mechanical Property: | The temperature of furnace can reach more than 1350℃,and the tolerance for setting and real temperature can be controlled whithin +/-2℃,which is impossible for the traditional annealing. |
| 3. Perfect Inspection Method And Inspection Equipment: | 100%PMI test 100%Hydraulic test 100%Inner cleaned by sponge 100%Dimension test 100%Surface test Quality of precision drawn tubing is same to precision rolling. |
| 4. More Precision Dimension: | Advanced cold drawn technology from Japan and Korean,Making the close dimension controls. |
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