1. Ductile Iron Pipe & Fittings
CNBM International Corporation

2. Company Profile
CNBM, China National Building Material Group Corporation, is the largest group company in China building material & equipment industry .
It was incorporated in 1984 upon the approval from the State Council of China. It is one of the 143 large-scale groups under the administration of China State - owned Assets Supervision and Administration Commission.
There are over 300 subsidiary factories and companies within our Group; 2 public listed companies in Hong Kong, 4 Public listed companies in China mainland; 11 publicly listed companies in which CNBM has a substantial percentage of shares.

3. Company Profile
As the primary subsidiary company of CNBM Group, CNBM International Corporation has grown into a leading production base and renowned supplier of ductile iron water pipe & fittings of both potable and sewage water in China.
Annual capacity: ,000 Metric tons
Applied standard: ISO2531:1998 / EN545:2002 / EN598:1995
Manufacturing system: ISO9001:2000
Market: Europe, Middle East, Africa, South America
Quality system: ISO9001
The foundry was founded and put into production since 1990’s.

4. Introduction of Ductile Iron Pipe
Ductile Iron Pipe, a product of advanced metallurgy, offers unique properties for conveying portable/sewage water under pressure. It combines the physical strength of mild steel and long life of gray cast iron, and has been widely adopted in worldwide range.
CMAX® Pipeline products comply with and are tested according to relevant European and International standards. All of our products are manufactured under the quality management system ISO 9001.

5. Certificates ISO2531:1998& EN545:2002 (Part.1)

6. Push-on Joint Centrifugal Ductile Iron Pipe
DN (mm)
Nominal
Diameter
DE (mm)
Outside
Wall Thickness (mm)
Approximate
Weight of Socket (kg)
Weight of Straight Section (kg/m)
Total Weight of Standard Working Length L=6m (kg) K8 K9
K10
K12
100
118
6.0
6.1
4.3
14.9
15.1
93.7 95
150
170
6.3
7.1
21.8
22.8
138
144
200
222
6.4
10.3
28.7
30.6
183
194
250
274
6.8
7.5
9.0
14.2
35.6
40.2
44.3 53
228
255
280
332
300
326
7.2
8.0
9.6
18.6
45.3
50.8
56.3
67.3
290
323
356
442
350
378
7.7
8.5
10.2
23.7
55.9
63.2
69.6
83.1
359
403
441
522
400
429
8.1
10.8
29.3
75.5
83.7
433
482
532
629
500
10.0
12.0
42.8
92.8
104.3
115.6
600
669
736
871
635
8.8
9.9
11.0
13.2
59.3
122.0
137.3
152.0
182
791
882
971
1151
700
738
14.4
79.1
155.0
173.9
193.0
231
1009
1123
1237
1465
800
842
10.4
11.7
13.0
15.6
102.6
192.0
215.2
239.0
286
1255
1394
1537
1819
900
945
11.2
12.6
14.0
16.8
129.9
232.0
260.2
289.0
345
1522
1619
1864
2200
1000
1048
13.5
15.0
18.0
161.3
275.0
309.3
343.2
411
1811
2017
2221
2627
1200
13.6
15.3
17.0
20.4
237.3
373.7
420.1
465.9
558
2480
2758
3033
3586

7. Flow Chart Spectral analysis Blast furnace Spheroidization
Furnace refining
Electric
furnace
Testing
Mechanical
properties
Polishing
ends ＆
Inside
of pipe
Zinc
coating
Annealing
Centrifugal
casting
Polishing cement
Coating of big
size of pipe
Drying
cement
coating
Hydro test
beveling
Cement coating
Drying
bitumen
painting
Testing ＆
packing
Bitumen
painting
Increasing
temperature
Final product

8. Resultant of iron ore & carbon burned
Raw Materials
Resultant of iron ore & carbon burned
Iron ore & carbon

9. Testing Silicon, Manganese, Phosphor
Testing Process
Testing Sulfur
Testing Silicon, Manganese, Phosphor

10. Melting Equipment Blast Furnace
Temperature increases very quickly to ensure a high production efficiency.
Waste gas of blast furnaces will be recycled to annealing process.

11. Melting Iron The temperature of melting iron should be above 1400℃。
The percentage of sulfur is up to 0.01%-0.025% after desulfurization.

12. Adjusting the composition of melting iron
Add suitable quantity of steel scrap & silicon-iron into electrical furnace according to the composition of melting iron to meet the requirement
Sampling and testing the composition of melt iron after the adjustment, confirming the quantity of magnesium and silicon added.
C+1/3Si=CE= 4.2% ~ 4.6% (water cooling)

13. Sampling& Analysis It should be sampled under
200mm of melt iron surface
from ladle.
It should be sampled on ½
place between the middle
of melt iron surface and
wall ladle.
Spectral analysis after
sampled again.

14. Spheroidization Process
Less fog, less pollutant；
Less residue，clean melt iron；
The absorptivity of magnesium is high, but the temperature of melt iron reduced is slowly.
Economical energy source
Easy to control the composition of melt iron, the percent of magnesium resided is nearly fixed.
The speed and quantity of magnesium added are the basis of quality of melt iron spheroidization

15. Composition of melt iron after spheroidization
Better quality melt iron spheroidized
3.4%≤C≤3.7%
2.0%≤Si≤2.4%
Mg≥0.04%
Re＜0.030%
S＜0.020%
P＜0.08%
Mn＜0.4%
Qualified melt iron spheroidized
C≥3.2%
1.8%≤Si≤2.6%
Mg≥0.035%
Re＜0.030%
S＜0.020%
P＜0.08%
Mn＜0.4%

16. Pull out the pipe from pipe mould
Centrifugal Casting
Centrifugal casting
Pull out the pipe from pipe mould

17. Quality Control & Test
Quality control and test
Visible test

18. Annealing Process
It is needed to be annealed under high temperature for ductile iron pipe made by water cooling centrifugal casted ( ℃)

19. Elongation Test
If there is no any small crack of pipe after test , HBS≤230HB and elongation ≥10%

20. Zinc Coating The density is not less than 130g/m2.
The minimum density is not less than 110g/m2.
Higher density can be applied.

21. Weight of Zinc coating measured

22. Polishing the socket and spigot Polishing inside of pipe

23. Dimension of socket measured
Dimension of spigot measured

24. Mechanical properties test
Metallography
Tensile test
Ring pressed test

25. Hydraulic Test DN K9 Time 80-300 5Mpa 15s 350-600 4Mpa 700-1000

26. Wall thickness measured

27. Cement Coating Acc to ISO4179 standards and requirements Size
Thickness required
DN80-300
3mm DN
5mm DN
6mm

28. Drying the cement Lining
The pipes should be put in drying pool after 15 min stayed in air which is steam press ≥0.1MPa，temperature＞30℃-55 ℃ ，humidity≥85%，time＞8 hours

29. Polishing the cement coating

30. Heat Treatment
It should be painted bitumen when the temperature of pipe is up to 70-80℃.

31. Bitumen painted
It is equal or more than 70um according to ISO2531 standard

32. Measure the thickness of bitumen coating

33. Drying
The bitumen coating will be dry quickly under 60—70℃ when they are put in drying equipment.

34. Finished products in stock

35. Customers & Third party inspector

36. Pipes in truck

37. Pipes in containers

38. Pipes in bulk vessel

39. CNBM,CAST TODAY AND TOMORROW!

40. Look forward to having a prosperous future with you!
CNBM International Corporation
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