Product name: Ductile cast iron pipes
Material: ductile iron
Standard: EN545/ISO2531/BS4772
Usage: potable water
Production process:
1)Molten iron
2)Molten iron purification
3) Heating and sphereodization
4)Spheroidization
5)Centrifugal casting
6)Annealing
7)Zinc sparing
8)Rounding and grinding
9)Hydraulic testing
10) Cement lining
11) Cultivating
12) Bitumen coating
13)Packing

Grade:
K8/K9,K10/K11,K12, or C40/C30
Effective length: 6M for bulk shipment, 5.7M for 20' or 40' container shipment;
Inner surface cement lining conforms  to ISO4179,the cement mortar is firm,dense,smooth and strong adhesion.
  outer surface zinc+bitumen coating according to ISO8179;
Zinc coating: At least 130G/M2, bitumen coating at least 70um.
We also can do the pipes with epoxy coating inside or outside conforms to ISO2531.

Quality control:
#providing the metallographic examination;
#Graphite 6-7class, spheroidization rate  not below 80%
#Mechanical properties:
# Carrying out the test on line strictly during production process.
#High strength, lighter than gray iron, good corrosion resistance, small flow resistance, easy fixing, long life time.

Specification for K9 grade: