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Picture for Update on eSCC Case Studies and Guidelines for SCC Prevention
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Update on eSCC Case Studies and Guidelines for SCC Prevention

Product Number: 51312-01137-SG
ISBN: 01137 2012 CP
Author: Russell D. Kane
Publication Date: 2012
$20.00
Picture for Upstream Assets Integrity Management
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Picture for USDA-certified Biobased, Low VOC and Biodegradable Paint Stripper and Graffiti Remover
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USDA-certified Biobased, Low VOC and Biodegradable Paint Stripper and Graffiti Remover

Product Number: 51320-14503-SG
Author: Ming Shen, Sen Kang, and Casey Heurung
Publication Date: 2020
$20.00
Picture for Use of Hygrothermal Models for Understanding Water Transport in Corrosion Under Insulation Application
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Use of Hygrothermal Models for Understanding Water Transport in Corrosion Under Insulation Application

Product Number: 51319-13484-SG
Author: Sai Prasanth Venkateswaran
Publication Date: 2019
$20.00

Thermal insulation is used in operating facilities to conserve heat and protect against freezing amongst others. A consequence of insulating the pipe is the necessity to manage the introduced threat of corrosion under insulation (CUI). For CUI to occur water and oxygen must enter and migrate through the insulation to reach the external surface of the pipe. The water transport characteristics are dependent on several factors such as type of insulation type of jacketing pipe operating temperature external weather water entry/leakage rate and cyclic service. In hot piping there are competing water transport characteristics as in water vapor moves outwards away from the pipe as water enters into insulation. Knowing the water transport and the parameters that influence the time of wetness at the metal surface helps in understanding conditions favoring CUI.The use of transient hygrothermal models for moisture control is well established in the building insulation design codes and standards. The building designs naturally shed the liquid water to minimize entry and facilitate breathing of vapor so that moisture doesn’t accumulate within building. Several building industry hygrothermal models have been developed and are available for commercial use. One such commercial model has been used to understand water transport in a CUI application. The case study involves evaluation of piping and pipeline installed with a closed cell polyurethane insulation. The hygrothermal model provided insights on the parameters influencing the time of wetness and the ease of water escaping the pipe-insulation-jacketing system. Additional results comparing different insulations are also presented.Key words: Corrosion under insulation water transport hygrothermal models building industry polyurethane insulation

Picture for Use of Large Standoff Magnetometry in Pipeline Integrity Investigations
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Picture for Use of NACE TM0111 Slow Strain Rate Test for Evaluation of Ethanol SCC
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Use of NACE TM0111 Slow Strain Rate Test for Evaluation of Ethanol SCC

Product Number: 51315-5945-SG
ISBN: 5945 2015 CP
Author: Russell Kane
Publication Date: 2015
$20.00
Picture for Using a Computational Galvanic Model in a Fracture Mechanics Framework to Improve Material Degradation Prediction
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Using a Computational Galvanic Model in a Fracture Mechanics Framework to Improve Material Degradation Prediction

Product Number: 51320-14646-SG
Author: Robert Adey, Andres Peratta, John Baynham, Thomas Curtin
Publication Date: 2020
$20.00

Although computational methods have been separately developed to predict corrosion and fatigue crack growth rates for metallic structures, challenges remain in implementing a methodology that considers the combined effects. In this work the output from a galvanic model is used to determine the spatial distribution of corrosion damage; providing a guide for the location of discrete corrosion damage features that can be analyzed using stress fields from structural models. In order to build confidence in this approach the galvanic models are validated by comparing predicted results to surface damage measurements from test specimens subject to ambient atmospheric exposure. There was good comparison between the predicted spatial distribution of corrosion damage and the measured surface damage profiles obtained from the galvanic test specimens. Following this exercise novel computational corrosion damage features were developed to represent simplified cracks shapes emanating from corrosion pits. Stress intensity factors (SIF) for these newly developed hybrid pit-crack features were determined and these solutions compared to cases where the pit is assumed to be an equivalent crack.  The impact of the local, cavity induced stress field, on the SIF solutions is discussed. Building on these findings a fatigue crack growth simulation was performed using an initial flaw emanating from a hemispherical cavity (corrosion pit) located at the edge of hole in a plate. A reasonable comparison, of the predicted number of crack growth cycles, to available experimental test results was achieved.