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Thickness measurement of high temperature boiler tubes

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  • Safe remaining lifetime assessment of power plant steam

    The boiler was made of common steels used in boilers produced 20-25 years ago in the 1980s. High temperature tube banks and headers were made of 10 CD 9-10 2,25Cr1Mo ferritic low-alloy steel (SA 335 P22 equivalent), the lower temperature superheaters were made of 15 CD 2-05 0,5Cr0,5Mo low-alloy steel with limited creep resistance.Get Price

  • Thickness Mapping Of Boiler Tubes With EMAT - NDTS

    Thickness Mapping Of Boiler Tubes With EMAT - NDTSGet Price

  • Creep-Rupture Assessment of Superheater Tubes Using

    Using Nondestructive Oxide Thickness Measurements BR-1697 Abstract Steam-carrying superheater and reheater tubes in fos-sil-fired boilers operating at temperatures above 900F (482C) are subject to failure by creep-rupture. These tubes form an internal oxide layer that inhibits heat transfer through the wall and causes the tube metal temperature toGet Price

  • Ultrasonic Thickness Gauging - NDTS

    In-Service High Temperature (up to 600⁰C) Thickness Measurement by EMAT Boiler Water Wall Tube Inspection by EMAT Corrosion Mapping / Defect Detection of Field Pipelines (4", 6" & 8") by Intelligent PiggingGet Price

  • Material Considerations in Boiler Design

    temperature but in real life, tube metal temperature increases as ID scale forms. Rehn et als have used the Larson-Miller parameter6 to correlate scale thickness as either or both temperature or time increase. The Larson-Miller parameter, P, is: P = T (20 + log t) (10)Get Price

  • Effect of High Temperature on Rear Pass Boiler Tubes in

    This work presents the investigations on three sample boiler tubes in the rear pass area (low temperature reheater 1 (LTR1)(A210-A1), intermediate temperature superheater (ITS)(A210-C) and economizer tubes) ) (A210-C) of a coal-fired power plant in Malaysia, which had been replaced during major overhaul in January 2014 after running for about 11 years.Get Price

  • (PDF) High Temperature Graphitization Failure of Primary

    High-Temperature Graphitization Failure of. Primary Superheater Tube. Abstract: Failure of boiler tubes is the main cause of unit. outages of the pla nt, which further af fects the relia bility Get Price

  • Design of a high temperature erosion apparatus for testing

    The unit, as designed, would allow testing of boiler tubes up to a temperature of 650 C and particle velocities of up to 50 m/s. The apparatus, tested at room temperature for 4 identical samples, yielded very similar erosion values, which were based on measurement of weight loss. At elevated temperature, erosion could be followed by a thickness Get Price

  • Ultrasonic Thickness Gauging-UTG-UTM-PWHT Solutions Pvt Ltd

    HIGH-TEMPERATURE THICKNESS GAUGING (UP TO 350 DEGREE C) We offer on-site oxide scale thickness measurement services to measure the thickness of oxide scale build-ups inside boiler tubes. The gauge simultaneously displays the metal thickness of the boiler tube and the thickness of the oxide layer. Knowing the thickness of the oxide scale Get Price

  • (PDF) High Temperature Graphitization Failure of Primary

    High-Temperature Graphitization Failure of. Primary Superheater Tube. Abstract: Failure of boiler tubes is the main cause of unit. outages of the pla nt, which further af fects the relia bility Get Price

  • Boiler tube scale deposit measurement reduces energy cost

    Feb 02, 2016 · measurement of scale deposit Valmet provides a new service to measure and record the thickness of internal boiler tube deposit layers in boiler waterwall tubing. The service uses ultrasonic technology and proprietary software to accurately measure the thickness of the deposit layer. Using this service allows for a more accurate chemical cleaningGet Price

  • Effect of High Temperature on Rear Pass Boiler Tubes in

    and then the high temperature reheater (HTR) and is risen to the required temperature for admission to the MP turbine. 2.2. Tubes Operational Facts . New A210 grade A1 (for LTR and ITS) and A210 grade C tubes (for economizer) were fitted in the boiler unit in July 2003. The tubes' inner radius and wall thickness are detailed in Table 1. Table Get Price

  • Stress and integrity analysis of steam superheater tubes

    Superheater tubes are surfaces for heat exchange, with the object of increasing the steam temperature, after it comes from the boiler drum, to a value higher than saturation. This has two basic purposes: to increase the thermodynamic efficiency of the turbine, in which the steam will be expanded; and to make the steam free of humidity.Get Price

  • Remaining life assessment for boiler tubes affected by

    Bergander M., Hryn W. EMAT thickness measurement for tubes in coal fired boilers. Proceedings of ASNT Fall Conference, Columbus, 2001. [Search CrossRef] NaWon-Bae A combination of PZT and EMAT transducers for interface inspection. Journal of the Acoustical Society of America, Vol. 111, Issue 5, 2002, p. 2128-2139.Get Price

  • Long Term Overheating (Creep) - Structural Integrity

    Introduction Long-Term Overheating/Creep (LTOC) in Steam-Cooled Boiler Tubes Long-term overheating and creep damage are often the damage mechanism associated with the normal or expected end of life of steam-touched tubes, which generally occurs after 100,000 hours or more of service life at elevated temperatures and pressures. Long-term overheating and creep can …Get Price

  • Thickness Measurement Technology using Cable-less Inner …

    It works on carbon steel and clad tubes. Tube thickness ranges from 3.8mm to 12.7mm & the minimum tube diameter requirement is 22.2mm, the tube surface can be oxidized, rough or pitted (scale-free). The technique permits inspection of the boiler instead of spot checking at up to 15cm/s of scanning speed.Get Price

  • [PDF] MEASURING OXIDE SCALE THICKNESS ON THE INNER …

    A significant limiting factor that affects tube life in fossil fired steam boilers is the growth of iron oxide scale (magnetite) on the inside and outside tube surfaces. Whi le external scale limits heat transmission into the tube and reduces boiler efficiency, internal scale build-up represen ts a potentially more serious problem and reduces the boiler life. Very high frequency ultrasonic Get Price

  • Boiler tube scale deposit measurement reduces energy cost

    Feb 02, 2016 · measurement of scale deposit Valmet provides a new service to measure and record the thickness of internal boiler tube deposit layers in boiler waterwall tubing. The service uses ultrasonic technology and proprietary software to accurately measure the thickness of the deposit layer. Using this service allows for a more accurate chemical cleaningGet Price

  • Boiler Tube Damage, - Energy1 Asia

    Understanding of the characteristics and performance of tube materials used in power plant boilers, HRSGs and other high-temperature boilers. The damage mechanisms that can limit the life of boiler tubes. • Principles of boiler tube Root Cause Failure Analysis. Benefit from studying various case histories of actual tube failures in boiler plant.Get Price

  • ASME_Boiler_Tube_Thickness - Boiler Engineering Calculations

    ASME Boiler Tube Thickness Calculator. C = minimum allowance for threading and structural stability (see PG-27.4.3) D = outside diameter of cylinder. E = efficiency (see PG-27.4.1) e = thickness factor for expanded tube ends (see PG-27.4.4) P = maximum allowable working pressure (see PG-21) R = inside radius of cylinder; for pipe, the inside Get Price

  • Low, Medium and High Pressure Boiler Tube

    Sep 21, 2020 · ①Generally, the temperature of boiler tubes is below 350℃. Domestic tubes are mainly made of No. 10 and No. 20 carbon steel hot-rolled tubes or cold-drawn tubes. ②High-pressure boiler tubes are often in high temperature and …Get Price

  • Investigation of Premature Failure of a Coal-Fired Boiler

    Jun 12, 2019 · The coal-fired boilers are exposed to severe service environment like high temperature, stress, corrosive atmosphere, and erosion, which lead to degradation of alloys. Boiler tube failure due to creep burst is the most common problem and shares nearly ~ 30% of the whole spectrum [3, 4]. The burst rupture resembles as "fish-mouth"-type feature.Get Price

  • TubeAlert Technology - Intertek

    Sep 15, 2020 · His field expertise includes failure investigations and root cause analyses, the preparation and evaluation of metallurgical replicas for assessing creep damage, ultrasonic measurement of internal oxide thickness in boiler tubes to assess remaining useful life, and multiple non-destructive inspection techniques for high energy piping.Get Price

  • Ultrasonic Oxide Thickness Measurement - Integrity NDT

    The non-destructive testing technique is an important tool for predicting the life of boiler tubes. A standard ultrasonic technique is used for measuring their wall thicknesses and determining theGet Price

  • US3721897A - Wall thickness and temperature monitoring

    US3721897A US00141409A US3721897DA US3721897A US 3721897 A US3721897 A US 3721897A US 00141409 A US00141409 A US 00141409A US 3721897D A US3721897D A US 3721897DA US 3721897 A US3721897 A US 3721897A Authority US United States Prior art keywords tube boiler measuring temperature terminals Prior art date Liming Legal status …Get Price

  • THICKNESS MEASUREMENT ROBOT FOR HORIZONTAL …

    Thickness Mapping Of Boiler Tubes With EMAT - NDTSGet Price

  • Thickness Mapping Of Boiler Tubes With EMAT - NDTS

    Jan 01, 1989 · An annual examination of boiler tubes involves to measure a decrease in wall thickness of the tube due to corrosion at high temperature and a size of bulge caused by a creep. We have developed the inspection robot shown in Fig. 3. Download : Download full-size image Fig. 3. Measurement UnitGet Price

  • High Temperature Corrosion Failure of a Secondary

    for investigation and correction of boiler tube failures, Report CS 3945, Electric Power Research Institute, Palo Alto, CA, April (1985) 6. J. Stringer, "High temperature corrosion problems in the Electric Power Industry and their Solutions" In high temperature corrosion NACE-6, (1983), p.389- 397. 7. S. R. Paterson and T. W. Retig, Remaining lifeGet Price

  • NON-DESTRUCTIVE METHOD FOR INNER SCALE MEASURING …

    OF BOILER TUBES Vinícius P. R. Figueiredo1, Vitor E. Moreira1, Oscar I. Hassegawa1, Ronaldo F. Faria1 1 CBC Heavy Industries S/A, Brazil ABSTRACT Boiler tube failures may cause forced shutdowns on facilities, and the thickness of the oxide deposited on the wall tubes inner surface, is the main cause of overheating damages.Get Price

  • Abstract Super heater Reheater

    In spite of these limitations, the oxide scale thickness measurement has become a standard tool in life prediction of high temperature tubings. For a boiler tube operating at high temperature an estimate of steam side oxide scale thickness with L-M parameter is first established. The equivalent temperature of operation of tube is thus estimated Get Price

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