Specifications: 
1) Raw material: 
a) Rolling welded steel tube: 4.*6 ~ 6.*5 x 0.*1 
b) Bracket: steel plate SPCC thickness 0.6 ~ 2.0 
c) Base mounting plate: SPCC thickness 0.6 ~ 0.8 
2) Technical standards: can produce according to clients' drawing or 
samples 
3) Performance: 
a) Surface with electrophoresis coating to prevent the corrosion 
b) Inner cleanness can meet the requirement of R**4a and CFC cooling system 
c) Can satisfy the cooling capability requirements 

Structure: 
Steel tube welded with the steel plate 

R**4a cooling system tube inside standard: 
1) Residual moisture: ≤*0mg/m² 
2) Residual dusty: ≤*0mg/m² 
3) Residual mineral oil: ≤7mg/m² 
4) Residual chlorine: ≤3mg/m² 
5) Sealing density: ≥1.*5MPa 

Specification of E-coating: 
1) Coating thickness: 
a) Thickness of anodic electrophoresis coating ≥*2μm 
b) Thickness of cathodic electrophoresis coating ≥*0μm 
2) Hardness of coating ≥2H 
3) Impact of coating: *0cm.kg/cm impact, no crack 
4) Adhesion of coating: ≥2 grade 
5) Flexibility of coating: around R=3D bend **0 degrees, no crack or no fall off 
6) Corrosion resistant (salt spray GB***3) 
a) Anodic electrophoresis coating ≥*4h 
b) Cathodic electrophoresis coating ≥*6h