Hi Winarko,
Steam and water analysis system in a power plant is exposed to "High Pressure" Wet Steam, which often causes FAC (Flow Assisted Corrosion).Austenitic stainless steels are better Materials of construction than P-91alloy under those operating conditions. Hence your clients' spec may have specified so.
If the deviation from the design specification is accepted by your client, then " it's their call". In absence of the such acceptance the change of material should not be allowed. You need to consult your client prior to making such changes, not making arbitrary decisions.
Don't you have any welding or Q.A /Q.C engineer in your team???
Thanks.
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Specialist
Ontario, Canada
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of pras ari
Sent: Saturday, October 18, 2014 1:23 AM
To: materials-welding@googlegroups.com
Subject: [MW:22142] Re: SS MATERIAL FOR HIGH PRESSURE & HIGH TEMPERATURE
Dear Sir,
We have made line from P91, but client specification mention " steam & water analysis system should be Stainless steel. what your opinion?
Winarko
On Saturday, October 18, 2014 3:53:28 AM UTC+7, Sergio Antonio Muñoz Pinzón wrote:
-- We have made line from P91, but client specification mention " steam & water analysis system should be Stainless steel. what your opinion?
Winarko
On Saturday, October 18, 2014 3:53:28 AM UTC+7, Sergio Antonio Muñoz Pinzón wrote:
Dear Pras Ari, have you considered Cr-Mo steels for your application?, KG.PANDITHAN made some good suggestions for your design. Chromium-Molibdenum steels have been proved in boilers in the power industry.Sergio Antonio Muñoz Pinzón
IWE-IIW
http://Weld-ING.blogspot.com
El viernes, 17 de octubre de 2014 02:44:41 UTC-5, pras ari escribió:Dear Sirs,
These pipe will be applied for HP steam sample point ( working pressure 75 bar and temperature 538 C).
On Thursday, October 16, 2014 10:19:18 PM UTC+7, Sergio Antonio Muñoz Pinzón wrote:http://steelfinder.outokumpu.com/GradeDetail.aspx?OKGrade= 4878&_ga=1.100970694. 619984163.1413471980
There are some austenitic and ferritic grades for high temp (i.e. 321H 304H), please provide more details about your application.
Sergio Antonio Muñoz Pinzón
IWE-IIW
http://Weld-ING.blogspot.com
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
No comments:
Post a Comment