Steel Wire

We produce double-wall copper brazed tube (or plated pvf) in accordance with iso9002 & advanced Equipment imported from germany. This kind of product possesses the characteristics ofExcellent tensile, anti-shock, anti-fatigue, high temperature & pressure resistance, clean Internal surface, little internal resistance, and draining protection etc. compared withCopper tube, double-wall copper brazed tube possesses is lighter weight, higher strength, Lower price etc. so it is the ideal product instead of copper tube. In refrigerating industry, it has been used to some brand-famous products, such as chunlan, Rongsheng, electrolux, white snow, changling, meiling, kelong etc. in automobile industry, We have supplied good tubing & shaped oil tube to faw, the second auto group, Sichuan Auto Co., Nanjing auto Co., and be exported to many countries, such as japen, Canada, Thailand, H. k etc. wellcome you select our tube to reduce your production cost. ========================================================Production technologyThe tube is rolled into double wall tube (720o) in use of high quality, super Precise cold rolling steel strip after double sides being plated with coppe, then Under the protection environment of using braze principle, brazed by 360o along The joint surface between the double walls. ========================================================Attachment: the list of spec with price of FOB china port-----------------------------------------------------Table 1. Double wall rolling copper brazed steel tubeOut diameter (mm) : 4 4. 75 6. 00 6. 35 8. 00, 10. 00 12. 00Permissible deriatio (mm) :  + -0. 08,  + -0. 10Wall thickness (mm) : --------------0. 7--------------------Weight (g / m) : 43 70 91 97 125 160 194Pressure resistance: 100 88 70 60 53 42 35( mpa, min) Minimum of enlarge rate: -------------20% min----------------Price (USD / M) : 0. 11 0. 15 0. 19 0. 20 0. 26 0. 34 0. 40------------------------------------------------------Table 2. Double wall brazed tube + plated by zinc or colour zincOut diameter (mm) : 4 4. 75 6 6. 35 8 10 12Weight (g / m) : 44 71 92 98 126 161 195Price (USD / M) : 0. 14 0. 20 0. 25 0. 28 0. 35 0. 44 0. 53-------------------------------------------------------Table 3. Double wall brazed tube + plated by pvfOut diameter (mm) : 4 4. 75 6, 6. 35 8 10 12Thk plated zinc (micron) : 5-8 8-15 20min, -----20 min-----Purfication of chromium acid: rainbow / white, ---oliue Green---Pvf coating (micron) : -------no-----------, --15 Max--Salt, frost resistantTime (h) : 72 144 288 480, ------4000-------Weight (g / m) : 45 72 93 99 128 164 198Price (USD / M) : 0. 25 0. 39 0. 50 0. 54 0. 68 0. 87 1. 08Wellcome you select our tube for your manufacture.