Wednesday, October 12, 2011

India - Water Loss through Pipeline Leakage - 700 million litres of water per day is lost along the 400 km of ageing pipeline network or by way of illegal connections in Mumbai

700 million litres of water per day is lost due to leakages along the 400 km of ageing pipeline network or by way of illegal connections in Mumbai.

BMC plans to outsource pipe leak detection

Of the 3,400 million litres of water supplied to the city every day, a whopping 700 million litres is unaccounted for. This means that it is either lost due to leakages along the 400-km of ageing pipeline network or by way of illegal connections.

In an effort to curtail leakages along water pipelines that lead to a loss of about 20 per cent of the total water supplied to the city, the BMC is mulling the option of outsourcing the work. Despite numerous efforts in the past to curb leakages either by forming a ‘leak detection squad’ or by planning to procure modern leak detection equipment, senior civic officials now feel they should appoint private firms to plug leakages.

Article Source:
Publication Date: 09 October 2011

Our Observation: Is there any effort made to identify the cause of leakage? Corrosion of water pipeline is one of the prime causes for huge loss in water and also affects the quality of water supplied to the public. It is highly advisable to have a corrosion research study for the quality of water and pipeline material chosen for distribution system.


  1. Comments Posted in our network:

    Yatinder Suri • BMC should use Duplex stainless steel pipes which will never corrode and leak even after 100 years. Stainless offers longest service life without any maintenance.
    Stainless Steel is the best bet when we talk of lowest life cycle cost.
    1 hour ago

  2. Manickam Valliappan • Thanks Mr Yatinder. Please share your case studies with our members. Is there any health hazard reported for the leaching of metallic consitutents and the influence of disinfectant program on these systems?

    Some more reference on the application of SS.

    Case 1:

    Stainless Steel Pipes for Drinking Water System in Tamilnadu

    The Tamil Nadu water supply and drainage (TWAD) board has awarded work orders to India-based IVRCL Infrastructures & Projects Limited to lay stainless steel leak-proof pipes from Madam to Uthangarai in Tamil Nadu state, India.

    The project, aimed at providing drinking water to 30 lakh people at a cost of INR19.28 billion ($428.8 million), commenced in 2009 after several delays. The current contract is Package II out of five packages planned for the project. IVRCL had also secured Package I of the project.

    Case 2:

    In 1997 the Tamil Nadu Water Supply and Drainage Board (TWAD) took a bold decision and replaced their existing cast iron raw water rising main from the Mettur Dam reservoir with a stainless steel line. They were facing severe problems due to corrosion of the cast iron pipes - namely leakage and pressure drops and expensive repairs/replacements of sections every two or three years. The life of the cast iron line was a little over 20 years. Salem Steel Plant offered the stainless steel option, costing not much over the existing line. A conservative life assurance of 50 years was given, although it could probably go on for many more decades. Now, after seven years of service, there has been "zero maintenance" in the line and tremendous savings in electricity bills. TWAD is very happy about the bold step taken years ago.

    Article Report Date: 2004
    2 seconds ago

  3. Ashok Mathew • I agree with Mr. Yatinder's suggestion. The quality of water supplied in Mumbai is very good in terms of TDS and salt content. So stainless steel should last for many decades. Now we should change our mind set in India and go for long term strategies instead of concentrating on short term gains. As Mr. Valliappan asked, is there any data on influence of disinfectant program on these systems?
    1 day ago

    Prem C Upadhyay • I feel the solution lies in economic feasibility between various options, like steel pipe duly protected by concrete or other suitable anti corrosive coatings coupled with cathodic protection and stainless steel pipes.

    The problem of pilferage leak is more prominent than corrosion.
    21 hours ago

  4. Jean-Pierre Audouard • Stainless steel water piping systems have been used for years in various countries like USA, Japan, Canada, Italy, etc...
    Usefull information may be obtained through IMOA (International Molybdenum Association) and hSPLASH. P.O. Box 8232. Huntington, WV 25705. 304-733-1516 www.S-P-L-A-H org. Please indicate my name when contacting SPLASH since I have been at the origin of this group several years ago when I was responsible for the Research Coordination and Technical Marketing Development with INDUSTEEL, Arcelor-Mittal Group.
    316L and Duplex 2205 are the best candidate materials and have been agreed by NSF in USA and by the EEC. They exibit a good corrosion resistance to pitting initiation and they are cost competitive when compared to cast iron, as demonstrated by a study carried out in the US by SPLAH organization.
    The effect of bactericide treatment onto pitting resistance is not a problem at all for 316L and Duplex 2205 since the pitting resistance is even improved during regular treatment by sodium hypochlorate as far as the residual concentration is correct. Nevertheless, I don't know if the effect of the treatment on crevice corrosion has been studied; so, I recommend that you search informations about this topic.
    In addition, I know that an extensive reserach has been funded by the Europeen Communities in Europe about the resisstance to soil corrosion : among the partners were INDUSTEEL, OUTOKUMPU and CEBELCOR.
    Please note than series 200 SS are not suitable since Ni addition is necessary to insure a correct resistance to pit propagation and to crevice corrosion. In addition, stainless steels must have a very low Sulfur content (< 0.002%) in order to prevent MnS non metallic inclusions in the steel which are very detrimental for pitting resistance.
    13 hours ago

  5. Manickam Valliappan • Dr Jean-Pierre Audouard,

    My sincere thanks to you for sharing a note indicating your collaborative mission with the worldwide agencies to research, manufacture and assess Stainless Steel for corrosion control. It is great to see that SPLASH is a non-profit alliance of suppliers, fabricators, equipment manufacturers and two metals associations. I will be in touch with them.

    Members of this forum can visit the following links:

    NSF, USA

    Some of the important points to note from National Sanitation Foundation:

    •Formulation, toxicology and product use information - Client and suppliers complete and submit NSF's Product Information Form. This provides formulation, toxicology and product use information.
    •NSF formulation review - NSF toxicologists perform a formulation review for each water contact material to determine any possible ingredients, contaminants, or reaction by-products that may potentially leach from the material into drinking water. This formulation review then determines the battery of chemical analyses that will be performed on a particular material.

    The important question we have with reference to experience in India: Are these clauses included in the selection and testing process? Moreover, there is no system similar to the web-based material search engine of NSF 61 Certified Potable Water System components.

    I request Mr Yatendir Suri, Country Head at Outokumpu India Pvt Ltd and other Stainless Steel Component manufacturers in this forum to use the collaborative experience of our members in formulating an appropriate study and resolving corrosion management challenges in the drinking water side.

    I have come across the information note on corrosion control education multi-media tools developed by your setup. Are these tools focused on specific environments like drinking water and chemical process?
    19 minutes ago


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