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51316-7233-A New Method for Prioritizing Equipment in HTHA Service for Inspection and Replacement

Background on High Temperature Hydrogen Attack (HTHA). Some current developments in HTHA inspection and mitigation. How several refiners have instituted an HTHA risk management plan for their refineries and the challenges and pitfalls they have encountered

Product Number: 51316-7233-SG
ISBN: 7233 2016 CP
Author: Jeremy Staats
Publication Date: 2016
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$20.00
$20.00

High Temperature Hydrogen Attack (HTHA) is a complex damage mechanism that continues to defy investigators trying to make predictions on the anticipated degree of damage or service life. This article provides some background on HTHA, discusses some current developments in HTHA inspection and mitigation, and describes how several refiners have instituted an HTHA risk management plan for their refineries and the challenges and pitfalls they have encountered. This paper also describes a new innovative screening methodology that has been used to screen over 100 equipment items operating in high temperature hydrogen services that needed individualized risk management plans. Materials included in the evaluations are carbon steel (CS), C-0.5Mo, C-Mn-0.5Mo, 0.5Cr-0.5Mo, 1Cr, and 1.25Cr equipment ranging in service exposure of 10 to over 50+ years. Several examples are provided.

Key words: downloadable, high temperature hydrogen attack, HTHA, API 941, Nelson Curves, risk assessment

 

High Temperature Hydrogen Attack (HTHA) is a complex damage mechanism that continues to defy investigators trying to make predictions on the anticipated degree of damage or service life. This article provides some background on HTHA, discusses some current developments in HTHA inspection and mitigation, and describes how several refiners have instituted an HTHA risk management plan for their refineries and the challenges and pitfalls they have encountered. This paper also describes a new innovative screening methodology that has been used to screen over 100 equipment items operating in high temperature hydrogen services that needed individualized risk management plans. Materials included in the evaluations are carbon steel (CS), C-0.5Mo, C-Mn-0.5Mo, 0.5Cr-0.5Mo, 1Cr, and 1.25Cr equipment ranging in service exposure of 10 to over 50+ years. Several examples are provided.

Key words: downloadable, high temperature hydrogen attack, HTHA, API 941, Nelson Curves, risk assessment

 

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