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Re: [MW:27915] Impact requirement for pressure vessel plates

By Materials & Welding
Not required. Impact test requirement is a function of Temperature and Thickness. Refer Table UCS-66 Curve D values for Normalised material. Moreover Weld Metal is also exempted from Impact tests if welding consumable is impacted tested at MDMT upto -46degC

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677



On ‎Sunday‎, ‎May‎ ‎27‎, ‎2018‎ ‎04‎:‎00‎:‎06‎ ‎PM‎ ‎+04, 'anand gupta' via Materials & Welding <materials-welding@googlegroups.com> wrote:


Yes 
Impact test required at _30 °c


A p gupta 
IOCL
BARODA 


On Sun, 27 May 2018 at 11:03 AM, vishnudas balachandran
<vishnudasb@gmail.com> wrote:
Dear All,
Vessel Data,
MDMT = ( - 30 Deg C),
Plate thickness = 12mm,
Dished end = 12/14,
Material = SA 516 Gr.70 N.+ HIC
Design Code - ASME Sec VIII DIV 1.

Is Impact testing required ?
As per UG-20 (f) (3) ,
"Design temperature is no warmer than 650°F (345°C) nor colder than −20°F (−29°C). Occasional operating temperatures colder than −20°F (−29°C) are acceptable when due to lower seasonal atmospheric temperature."

Is there any provision for wave Impact testing as per code provision(s). Kindly advise.

--
Regards,

Vishnu


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