Acceptance for Ovality in mid section of 90 deg Elbow
M S R K S Prasad
Recently we have ordered 8" X 20.62 mm thk 90 deg SMLS long radius (1.5 D) A403 WP 316L modified(Urea grade) elbows to be supplied as per ASME B 16.9 standard.
On verification of the elbows received at our site we found ovality in the mid section of the elbows.
The sketch showing the dimensions measured in the mid section is attached for reference.
When we verified ASME B 16.9 we found information about acceptance for out of roundness at end only.
Nothing was mentioned about acceptance criteria for ovality at the middle of the 90 deg elbow.
Learned members are requested to guide me in this matter .
regards
M.S.R.K.Srinivasa Prasad
A.G.M ( General Engg)
Nagarjuna Fertilizers And Chemicals Ltd
Nagarjuna Road
KAKINADA-533003
Ph: 0884-2360212(O),9676931414
2379302(R)
----- Forwarded by M S R K S Prasad/MAINT/KKD/NFCL/NAGARJUNA on 01/09/2016 11:37 AM -----
| From: | "PEMMARAJU RAGHAVENDRA" <r...@hzw.ltindia.com> |
| To: | <material...@googlegroups.com>, |
| Date: | 15/01/2010 10:00 AM |
| Subject: | Re: [MW:4049] Linear Indications After Pickling and passivation and PWHT |
| Sent by: | material...@googlegroups.com |
Dear All,
Thanks for the response given to me explaining the root cause of the same.
Could any of you help me in telling how to rectify / salvage the existing shell with the indications at the toes as mentioned below.
Regards,
Raghavendra
Larsen & Toubro Limited
www.larsentoubro.com
This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system.
>>> "PEMMARAJU RAGHAVENDRA" <r...@hzw.ltindia.com> 12/01/2010 09:01 am >>>
Dear All,
I have a typical problem with my vendor who is manufacturing Coke drums for us.
The stage of NDT including RT is such that we need to take RT before PWHT and before overlay.
One of the section ( shell to Shell) under went the above process and cleared. After that it was overlayed by AWS class Inconel E NiCrFe3 electrodes on base plates ( SA387 Gr.11 ClassII) with 410S cladding on either side. Later the same was subjected to Pickling and passivation and went for PWHT.
Now durng APWHT stage, when we are performing PT and RT, surprisingly we are getting two wagon track linear indications on either sides of weld toes from inside ( on cladding side) which are exactly the border junction of ENiCrFe3 inconel and 410S cladding of the shell plates.
It is having a depth of around 0.5mm and width also same.
Could any one explain the cause of formation of this indication at the above juncture. As per our estimation, it could have happend due to pickling and passivation. Since another shell with above processes ( except pickling and passivation ) has not got any such indications.
Thanks for your time and efforts.
Regards,
Raghavendra
Larsen & Toubro Limited
www.larsentoubro.com
This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system.
--
To post to this group, send email to material...@googlegroups.com
To unsubscribe from this group, send email to materials-weld...@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.
[ Disclaimer: This e-mail and any file transmitted (collectively referred to for convenience as “e-mail”) thereto contain proprietary and confidential information, data etc., intended solely for the use of the individual or entity to whom it is addressed which is subject to legal privilege. If you are not the intended recipient or have otherwise received the e-mail in error, please immediately notify the Sender by e-mail. Please delete, destroy and do not disclose the contents of e-mail to any other person or use it for any purpose or store or copy or distribute the information contained in the email in any medium. Any disclosure, copying or distribution of the contents of this e-mail transmission wrongly received by you or the taking of any action in reliance thereon or pursuant thereto, is strictly prohibited.]
Faizal, Majeed [c]
Dear All,
According to ASME B31.3, Section 332.2 Bending, flattering or ovality of a bend , the difference between maximum and minimum diameters at any cross section, should not exceed 8% of nominal outside diameter.
Thanks & Regards,
________________________
Faizal R Majeed
QC Piping/Mechanical
Saudi Chevron Phillips Chemical
Office (+966) 13 3568100 Ext.1466
E-mail : fai...@saudichevron.com
P Think Green!!! Please consider your environmental responsibility before printing this e-mail.
From: material...@googlegroups.com [mailto:material...@googlegroups.com]
On Behalf Of M S R K S Prasad
Sent: Thursday, September 01, 2016 9:11 AM
To: material...@googlegroups.com
Subject: [MW:25335] Acceptance for Ovality in mid section of 90 deg Elbow [**EXTERNAL**]
*** WARNING: This email originated outside of the CPChem network. Use caution opening attachments, clicking web links, or replying. ***
-
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-weld...@googlegroups.com.
To post to this group, send email to
material...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/materials-welding/OF37D2BCE3.F801C00A-ON65258021.0021A3C5-65258021.00227D7D%40nagarjunagroup.com.
For more options, visit
https://groups.google.com/d/optout.
dili...@gmail.com
| From: M S R K S Prasad Sent: Πέμπτη, 1 Σεπτεμβρίου 2016 - 09:33 Reply To: material...@googlegroups.com |
Subject: [MW:25335] Acceptance for Ovality in mid section of 90 deg Elbow |
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.
Hafiz Waqas
Dear Sir,
Could you please inform me about the permissible variation for elbow ovality? and also about that Tolerances of pipe and fittings deviation same or different.