Presentation on theme: "Ductile Iron Pipe & Fittings"— Presentation transcript:
1 Ductile Iron Pipe & Fittings CNBM International Corporation
2 Company ProfileCNBM, 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 ProfileAs 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 tonsApplied standard: ISO2531:1998 / EN545:2002 / EN598:1995Manufacturing system: ISO9001:2000Market: Europe, Middle East, Africa, South AmericaQuality system: ISO9001The 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.
6 Push-on Joint Centrifugal Ductile Iron Pipe DN (mm)NominalDiameterDE (mm)OutsideWall Thickness (mm)ApproximateWeight of Socket (kg)Weight of Straight Section (kg/m)Total Weight of Standard Working Length L=6m (kg)K8K9K10K121001186.06.14.314.915.193.7951501706.37.121.822.81381442002226.410.328.730.61831942502746.87.59.014.235.640.244.3532282552803323003267.28.09.618.645.350.856.367.32903233564423503787.78.510.223.755.963.269.683.13594034415224004298.110.829.375.583.743348253262950010.012.042.892.8104.3115.66006697368716358.89.911.013.259.3122.0137.3152.0182791882971115170073814.479.1155.0173.9193.0231100911231237146580084210.411.713.015.6102.6192.0215.2239.0286125513941537181990094511.212.614.016.8129.9232.0260.2289.034515221619186422001000104813.515.018.0161.3275.0309.3343.24111811201722212627120013.615.317.020.4237.3373.7420.1465.95582480275830333586
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 requirementSampling 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 surfacefrom ladle.It should be sampled on ½place between the middleof melt iron surface andwall ladle.Spectral analysis aftersampled 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 sourceEasy 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 spheroidized3.4%≤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 spheroidizedC≥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 CastingCentrifugal castingPull out the pipe from pipe mould
17 Quality Control & TestQuality control and testVisible test
18 Annealing ProcessIt is needed to be annealed under high temperature for ductile iron pipe made by water cooling centrifugal casted ( ℃)
19 Elongation TestIf 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.