Hydrocarbon Processing Copying and distributing are prohibited without permission of the publisher

Improve evaluation of brittle-fracture resistance for vessels

01.01.2013  |  Sims, J. R. ,  Becht Engineering Co. Inc., Liberty Corner, New Jersey

This article discusses a new approach and spreadsheet tool for engineers that can be used to provide operating pressure limits as a function of vessel-metal temperatures.

Keywords: [heat transfer] [brittle fracture] [refrigeration] [design codes] [reactors] [towers]

Process vessels such as towers, drums and heat exchangers can be exposed to low temperatures as part of normal operating conditions or due to a process upset. Carbon and low-alloy steels typically used in process vessels undergo a transition from ductile to brittle behavior as temperature is reduced and are at increased risk of brittle fracture at low temperature. To reduce this risk, the American Society of Mechanical Engineers (ASME) Boiler & Pressure Vessel Code contains requirements for vessels and vessel components with respect to low-temperature operation.1 While these rules are applicable to new construction, API 579-1/ASME FFS-1 Fitness-For-Service uses the rules as the basis to evaluate brittle fracture resistance for existing vessels.2 This article discusses an approach and spreadsheet tool that can be used to provide operating pressure limits as a function of vessel-metal temperatures. These limits can be used as part of a process hazard analysis (PHA) to set operating pressure guidelines for process vessels identified with the potential for low-temperature excursions from auto-refrigeration of light, low-temperature boiling point, liquid hydrocarbons.

To continue reading please, log in to hydrocarbonprocessing.com.

Subscribe now for premium access and unlimited access to the site, including archived articles and the process handbooks.  Start a free trial to gain access to articles from the current issue of Hydrocarbon Processing. 

Already have an account?


Subscribe today and gain unlimited and immediate access to the site. Plus, you'll receive the next 12 issues of the magazine in your choice of print or digital format. Start your subscription today.

Free trial

Start a free trial and gain immediate access to the current issue of the magazine plus additional, select content.

30 Day Trial

Abdul Sattar Abdul Hannan

Article is very useful to determine MAT of vessels in process plant. Most of the vessels in gas ser ice are suseptible to brittle failure and but not impact tested, for these vessels it is necessary to calculate MAT. Pl. let me know how i can get copy of the spread sheet? Thanks

Roy Young

OK... How do I get a copy of the spreadsheet?


Related articles


Sign-up for the Free Daily HP Enewsletter!

Boxscore Database

A searchable database of project activity in the global hydrocarbon processing industry


Is 2016 the peak for US gasoline demand?




View previous results

Popular Searches

Please read our Term and Conditions and Privacy Policy before using the site. All material subject to strictly enforced copyright laws.
© 2016 Hydrocarbon Processing. © 2016 Gulf Publishing Company.