CNBM International CorporationCNBM International Corporation

Company ProfileCompany 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.

Company ProfileCompany 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: 250,000 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.

Introduction of Ductile Iron PipeIntroduction 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.

CertificatesCertificates

ISO9001:2000ISO2531:1998&

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

EN545:2002(Part.2)ISO14001:2004

Push-on Joint Centrifugal Ductile Iron PipePush-on Joint Centrifugal Ductile Iron Pipe

DN (mm)NominalDiameter

DE (mm)OutsideDiameter

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 K8 K9 K10 K12 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 6.4 7.2 8.0 9.6 18.6 45.3 50.8 56.3 67.3 290 323 356 442

350 378 6.8 7.7 8.5 10.2 23.7 55.9 63.2 69.6 83.1 359 403 441 522

400 429 7.2 8.1 9.0 10.8 29.3 67.3 75.5 83.7 100 433 482 532 629

500 532 8.0 9.0 10.0 12.0 42.8 92.8 104.3 115.6 138 600 669 736 871

600 635 8.8 9.9 11.0 13.2 59.3 122.0 137.3 152.0 182 791 882 971 1151

700 738 9.6 10.8 12.0 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 12.0 13.5 15.0 18.0 161.3 275.0 309.3 343.2 411 1811 2017 2221 2627

1200 1255 13.6 15.3 17.0 20.4 237.3 373.7 420.1 465.9 558 2480 2758 3033 3586

Furnace refiningBlast furnace

Electric furnace

Spheroidization

Centrifugal casting

AnnealingTesting

Mechanical properties

Polishing ends ＆

Inside of pipe

Zinc coating

Hydro test beveling Cement coatingDrying cement coating

Polishing cement Coating of big

size of pipe

Bitumen painting

Increasing temperature

Testing ＆ packing

Final product

Drying bitumen painting

Spectral analysis

Flow ChartFlow Chart

Iron ore Iron ore && carbon carbonResultant of iron ore Resultant of iron ore && carbon burnedcarbon burned

Raw MaterialsRaw Materials

Testing ProcessTesting Process

Testing SulfurTesting Sulfur Testing Silicon, Manganese, PhosphorTesting Silicon, Manganese, Phosphor

Melting EquipmentMelting Equipment

Blast FurnaceBlast Furnace

• Temperature increases very quickly to ensure a high production efficiency.• Waste gas of blast furnaces will be recycled to annealing process.

Melting IronMelting Iron

• The temperature of melting iron should be above 1400℃。

• The percentage of sulfur is up to 0.01%-0.025% after desulfurization.

Adjusting the composition of melting ironAdjusting 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)

Sampling& AnalysisSampling& Analysis

• It should be sampled under 200mm of melt iron surfacefrom ladle.

• It should be sampled on ½place between the middleof melt iron surface andwall ladle.

• Spectral analysis after sampled again.

Spheroidization ProcessSpheroidization 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

Composition of melt iron after spheroidizationComposition 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%

Pull out the pipe from pipe mouldPull out the pipe from pipe mould

Centrifugal castingCentrifugal casting

Centrifugal CastingCentrifugal Casting

Qu

ality con

trol an

d

Qu

ality con

trol an

d

testtest

Visible testVisible test

Quality Control & TestQuality Control & Test

• It is needed to be annealed under high temperature for ductile iron pipe made by water cooling centrifugal casted. (920-950 )℃

Annealing ProcessAnnealing Process

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

Elongation TestElongation Test

Zinc CoatingZinc Coating

• The density is not less than 130g/m2.

• The minimum density is not less than 110g/m2.

• Higher density can be applied.

Weight of Zinc coating measuredWeight of Zinc coating measured

Polishing inside of pipePolishing inside of pipe

Polishing the socket and spigotPolishing the socket and spigot

PolishingPolishing

Dimension of spigot measuredDimension of spigot measured Dimension of socket measuredDimension of socket measured

Mechanical properties testMechanical properties test

MetallographyMetallography Tensile testTensile test Ring pressed testRing pressed test

Hydraulic TestHydraulic Test

DN K9 Time

80-300 5Mpa 15s

350-600 4Mpa 15s

700-1000 4Mpa 15s

1100-2000 4Mpa 15s

Wall thickness measuredWall thickness measured

• Acc to ISO4179 standards and requirements

Size Thickness required

DN80-300 3mm

DN350-600 5mm

DN700-800 6mm

Cement CoatingCement Coating

Drying the cement LiningDrying 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

Polishing the cement coatingPolishing the cement coating

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

Heat TreatmentHeat Treatment

It is equal or more than 70um according to ISO2531 standard

Bitumen paintedBitumen painted

Measure the thickness of bitumen coatingMeasure the thickness of bitumen coating

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

DryingDrying

Finished products in stockFinished products in stock

Customers & Third party inspectorCustomers & Third party inspector

Pipes in truckPipes in truck

Pipes in containersPipes in containers

Pipes in bulk vesselPipes in bulk vessel

Look forward to having a prosperous future with you!Look forward to having a prosperous future with you! CNBM International Corporation Head Office: Tel: +8610 6879 6395Fax: +8610 6879 6304Mobil: +86 186 1110 2401E-mail: elvisyang@icnbm.com