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

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 

Sent from Yahoo Mail on Android

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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