hi Yoga
You can qualify a PQR from 30 mm thick plate and the range will be as per ASME SEC IX.
Regarding your query for PWHT B31.3 speaks for 20mm and above to be PWHT done.
For qualifying a PQR for B31.3 there is not contrain that the PQR to be qualified from 20 below thk plate, but you shall not use the above PQR for welding the material 20 mm and above for B31.3 without PWHT.
With Regards
Ganesh
From: yoga nandhan <yoganandhan@gmail.com>
To: materials-welding@googlegroups.com
Sent: Wed, 2 February, 2011 10:24:07 AM
Subject: [MW:9674] PQR Base metal thickness Qualification
Hi,
-- To qualify a base metal thickness for 15 to 19 mm for construction code as per ASME B31.3, is it possible to qualify with a pipe coupon 24" x sch-80 (30.96 mm machined to 30 mm) (Due to material availabilty).
As per construction code above 19 mm, PWHT is required. Since this PQR is being qualified for base metal thickness from 15 mm to 19 mm, No PWHT will be done.
Can u clarify plz, will it be correct to choose this material. Also, can we achieve Hardness less than 248 HV10.
--
Regards
Yoganandhan.P
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/
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.
No comments:
Post a Comment