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DEPOSIT ANDTUBE FAILURE ANALYSIS 10 I WWW.CONCO.NET Military strategist Sun Tzu once wroteknow your enemy and you will win a thousand wars.At Conco we believe knowing what type of fouling deposits are within your tubes can help you win the war against tube fouling and failure. By utilizing Concos tube shooting method crews are able to capture whole tube deposit samples. This would be virtually impossible to do with high-pressure water or chemical cleaning. These deposits are then analyzed and key elements and their organic content are identified. Armed with this information your chemistry team can then make the necessary adjustments to your cooling water to reduce the impact of future deposits. Know your enemy and win the war on tube fouling and failure. Deposit Analysis Once a Conco cleaning crew collects a deposit sample from a condenser or heat exchanger tube the sample is sent to Concos lab. There the sample is filtered and dried and a loss-on-ignition test is performed. A representative portion is then analyzed and a full report is provided to the customer. Deposit Density Full-length tube deposit samples are taken by shooting Conco TruFit tube cleaners through selected tubes and collecting the deposits. These samples are then filtered dried and measured to determine the deposits weight in grams. Deposit density then provides information for trending and cleaning effectiveness. Tube Failure Analysis Before you can prevent future tube failure you must first determine the cause of current tube damage and failure. Concos Tube Failure Analysis Service analyzes tube surface abnormalities. A tube is pulled from the subject condenser or heat exchanger. Then it is sectioned and subjected to a host of metallurgical examinations and tests. Once testing has been completed and all tube surface abnormalities identified a full report is provided to the customer. Deposit Analysis Plant Power Station Unit Unit No. 4 Condenser Tube Info 25.4 mm 1 O.D. x 22 BWG x 9 m 30 L Date of Sample January 8 2014 Analysis XRF X-Ray Fluorescence Elements Iron 14.61 Manganese 17.30 Calcium 18.17 Nickel 0.002 Magnesium 2.36 Cobalt 0.002 Titanium 0.076 Tin 0.00 Potassium 0.16 Sodium 0.06 Silicon 22.95 Zinc 0.004 Aluminum 0.89 Copper 0.002 Zirconium 0.009 Molybdenum 0.002 Phosphorus 0.16 Sulfur 0.23 Loss on Ignition 750 C 43.17 Samples Deposit Wt. Density Cleaner Type Passes Deposit Wt. g gm2 gsq.ft. C3S 1 18.46 27.23 2.49 C3S 1 12.93 19.07 1.74 C3S 1 21.05 31.05 2.84 Damaged Tube EndTube Wall Showing Pitting Due to Magnesium DepositCondenser Tube Fouled with Calcium Carbonate Scale