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Ductile Iron (DI) Pipes - Quality Standards |
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Quality policy
Ductile Iron Pipe Division of Electrotherm India Limited aspires to protect our environment and enhance quality of life by
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Providing safe, strong and durable pipes for transport of water, gas and sewage |
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Adopting processes which will add minimal pollutants to our environment |
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Delivering desired quantities in time |
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Reducing waste |
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Motivating & training employees to bring out the best from them. |
For continuous improvement, we rely on training, reduction of waste and effective utilization of resources.
Quality Assurance & Control DI Pipes
| RAW MATERIAL |
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Test certificates along with supply of repeated supplier |
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Internal checking of composition as per QAP |
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| INDUCTION FURNACE |
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Weighing balance for raw material charging |
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Immersion pyrometer for temperature checking |
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Chemical Analysis from lab / spectrometer |
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| LADLE TREATMENT / CONVERTER FOR "Mg" TREATMENT |
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Temperature check by immersion pyrormeters |
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Treatment checking for residual Mg at CCM |
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Final sample for elements including residual Mg, nodule count, nodule distribution in as cast pipe |
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| CASTING MACHINE |
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Identification of chemical composition of last pipe produced and its structure |
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Disposal of metal after the limit of fading effect |
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Ensure that liquid metal is free from slag |
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To control the temperature loss at hopper, ceramic blanket covered |
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Machine parameters like RPM, machine down-speed, hopper speed controlled |
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Addition of innoculants |
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Application of Graphite wash for easy flow of liquid metal through the runner |
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Core loader strength and spring compression check |
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Load cell to measure the weight of each pipe and adjustment of wall thickness of pipe |
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| GANTRY BEFORE ANNEALING FURNACE |
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Check the thickness by pistol caliper |
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Remove all sand from socket area before feeding in to the annealing furnace |
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Visual inspection for other parameters |
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| ANNEALING FURNACE |
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Check and control the temperature of different zones by thermocouples |
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check and control Furnace parameters like conveyer chain speed and temperature |
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Bend and ovality test after annealing |
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| SAMPLE CUTTING |
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For mechanical testing and microstructure analysis |
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Chamfering spigot area |
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Check the parameters with GO / NO GO gauges |
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Dimensional checking as per QAP |
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| ZINC COATING |
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Check and control machine parameters like trolley speed, RPM of pipe, wire feed rate, air pressure and power supply |
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Check the mass of the zinc deposition on the pipe |
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| GROOVE GRINDING |
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Check and control / trimming of extra metal on socket area (for rubber gasket seal fixing) |
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| HYDROSTATIC PRESSURE TESTING |
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Each pipe for required pressure |
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Check and control the flow of water as required |
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Check and control hydraulic clamping pressure |
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| CEMENT LINING |
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Check the sand and cement quality as per specifications |
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Check the cement, sand and water ratio |
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Check the lining thickness |
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Check the inner diameter after lining |
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| CEMENT CURING |
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Visual inspection after curing and clean lining surface if required |
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| BITUMEN COATING |
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Check and control machine parameters like trolley speed, RPM of pipe, air pressure and power supply |
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Check the mass of the bitumen deposition on the pipe |
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Check the coating thickness |
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| FINAL INSPECTION & MARKING OF PIPES |
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Certifications
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BUREAU OF INDIAN STANDARDS For manufacture of Centrifugally Cast (Spun) Ductile Iron Pressure Pipes for Water, Gas and Sewage as per IS : 8329-2000 in Class K-7 & K-9, spigot and socketed with push-on-joints, internal mortar (cement) lining and external zinc coating with finishing layer of bituminous paint. |
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Management System as per DIN EN ISO 9001:2000 in accordance with TUV CERT procedures by TUV CERT Certification Body at TUV NORD CERT GmbH. |
Registrations
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DIRECTORATE GENERAL OF SUPPLIES & DISPOSALS (DGS&D) – Shop floor inspection by DGS&D |
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GUJARAT WATER SUPPLY & SEWERAGE BOARD (GWSSB) – Shop floor inspection by Certification Engineers International Ltd. (CEIL) |
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MAHARASHTRA JEEVAN PRADHIKARAN (MJP) – Shop floor inspection by Iteng Engineering Pvt. Ltd., Mumbai. |
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MUNICIPAL CORPORATION OF GREATER MUMBAI (MCGM) – Shop floor inspection by MCGM. |
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Quick Contact:
+91-2717-234553, 234613, 660550 |
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