Re: [MW:12301] O-LET WELDING .......

Hamza,
1) As per the manufacture Instruction YOU HAVE TO
FILL THE GROVE.
2) Regarding PWHT you have to follow ASME B .31.3
Branch connection PWHT chart If the throught is more than 38 mm (2 x
19.5 min pwht requirement) you have to do PWHT do the thickness check
during FIT UP Inspection.
3) If you do welding in the shop (or ) in the
site you have to follow the same procedure.
Regards
Mano

2011/8/23, noorudheen hamza <noorucareer@gmail.com>:
> DEAR EXPERTS ......
>
> CAN ANYONE TELL ABOUT O-LET WELDING ....IN MY CASE WELD-O-LET JOINT
> WELDED ONLY 1.5 TIMES THICKNESS OF HEADER PIPE.... NOT COMPLETED FILL-UP
> ALSO .. WHATEVER THEY ARE TELLING ABOUT THIS THEY CAN AVOID PWHT FOR THAT
> JOINT ..... IF IT IS THEY ARE DOING FULL WELD ,UPTO BEVEL OF O-LET ,,AS
> PER THICKNESS OF WELD METAL THEY SHOULD TAKE ..PWHT ..... NW THEY ARE DOING
> 1.5 TIMES THK OF HEADER PIPE IN FABRICATION SHOP ... AND THEY WILL DO
> BALANCE WELDING AT SITE AFTER ERECTION AFTER A LONG TIME .......
>
> MY DOUBT IS, ITS POSSIBLE..?
> WELD HAVE CHANCE TO HAVING CRACK..?
> THERMAL EXPANSION HOW WORK ON IT ..?
> NEED PWHT IF IT IS FULL WELD ..?
> IF THEY ARE WELDING BALACE AFTER ERECTION, NO NEED PWHT ...? WHY..?
>
>
>
> PLEASE GIVE ME HELPFUL INFORMATION ..
> THANK...
>
> NP HAMZA
>
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