Description

 Ductile cast iron pipes dimension

 

 Production process flow of ductile iron pipes 

 Molten iron → molten iron purification → heating and sphereodization →

spherodization →centrifugal casting → annealing→znic spraying→rounding and grinding→hydraulic testing→cement lining→cultivating→bitumen coating→packing

 

 Quality control process 

 Screen material( ductile cast iron) → metallographic examination→ fast

 analysis→hardness test→twist test→ flat test→elongation test→damage test

 → type test

Antiseptic treatment 

   

 1). Epoxy coating inside

  

 2). Epoxy coating oustside

 

 3). Zinc spray

 

 4). Bitumen coating

 

 5). Cemen lining 

 

 6).Other antisepsis treaments according to customer's request

 

          During production process , we carry out tests on line strictly and test Items

 

includes:  hydraulic pressure, cement linning thickness, zinc spraying thickness,

 

bitumen coating  thickness,dimension test, impressing test and so on. Expecially,

 

we have the most advanced  y -ray  detector to test wall thickness of each pipe

 

precisely so that ensure pipes quality