NOTICE

Forums are temporarily disabled while we are working on a new login procedure.

When migrating the old forums over to our new forums we were unable to retain the identity of the authors, so the old posts will show up as "anonymous". All NEW posts will show up credited to their authors. So please participate and share knowledge just as you have in the past.

You must log in if you are an existing user or register if you are a new user in order to contribute to the discussions.

Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...Carbon steel A106GrB subjected to 450C for monthsCarbon steel A106GrB subjected to 450C for months
Previous
 
Next
New Post
8/3/2004 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
Dear All, I am a new member to this forum and probably the youngest one. Is it feasible to use A106Gr.B pipeline in steam service, temp=450C, pressure=18 kg/sq.cm ? The same was already exposed to the condition for 18 months, will there be any change in metallurgy ?? Is it usable further ??Please give some information or useful URL links. Thanks & Regards Ananda Sarkar Inspection Engineer HPL, India Ananda.Sarkar@hpl.co.in
 
New Post
8/3/2004 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
Ananda: We appreciate your interest in our technical discussion forum. Regarding your A106 Gr. B question, there are two issues which you should consider: graphitization and creep/stress-rutpure. Carbon steels can graphitize (converting pearlite in the steel to graphite) at temperatures over %7E400C with a risk of brittle fracture. Also, the steam pipe needs to have been designed with creep in mind at those temperatures. Hope this helps! David Hendrix The Hendrix Group Inc.
 
New Post
8/12/2004 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
A few comments to augment the statements by Mr. Hendrix.... The US Power piping code, ASME B31.1, allows A106 - Grade B piping usage in systems up to a continuous temperature of 775F (412C). Alloy steel piping is used above this temperature, most typically the chrome - moly material designated as 2.25 Cr - 1 Mo (A335-P22). This material also has upper limits of temperature usage. With regard to your operating pressure, this can only be evaluated with additional information about your pipe diameter, corrosion allowance, weld joint efficiency etc are available. regards... MJCronin
 
 Page 1 of 1
Previous
 
Next
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...Carbon steel A106GrB subjected to 450C for monthsCarbon steel A106GrB subjected to 450C for months


  

News

NEW! Calculation of Ammonium Salt Deposition Temperatures
With a little delay, our Calculation of Ammonium Salt Deposition Temperatures...read more
Sulfidic corrosion calculators NOW AVAILABLE
Our sulfidic corrosion calculators are now available at hghouston.com/calcula...read more

Stay Current

Sign up for our quarterly newsletter

covering updates on corrosion

Sign Up