Calibration of welding machines are required if you want to control the welding heat input. Heat input is required to be controlled when you are welding materials which are designed for low temperature and you are using a WPS/PQR qualified with impact tests.
Impact properties are affected due to heat input.
So you decide, what to do.
Control the heat input by controlling Voltage(V) / Amperage(A) and Travel speed.
To control V & A, you need calibrated Welding machines.
So if you want to weld low temperature materials or even materials which are required to be impact tested due to MDMT, you need to calibrate the welding machines, so that heat input is controlled.
Arunachalam
AIS
Abu Dhabi
On Sat, May 12, 2012 at 5:14 PM, yanfei Xiu <yanfeixiu@gmail.com> wrote:
Dear tskumar,could u tell me where the requirement that you said"in wqt, or pqr or any other documents we need to submit calibration
certificates for all equipments." is,because I didn't find any about this in ASME Ⅸ
2012/5/12 suresh kumar <tskumar12355@gmail.com>dear mani,
All welding machines should be calibrated by yearly basis or 6 months
once or as per manufacturer procedures.its mandatory things in
welding, why i am telling this for example,
in wqt, or pqr or any other documents we need to submit calibration
certificates for all equipments.
--
On 5/11/12, Manivannan Hemu <hemumanivannan@gmail.com> wrote:
> Hi,
> You have not mentioned, which code you are following
> for your production/fabrication weld.
> In API 6A para 6.3.2.7 - welding controls specify as below:
> " Instruments to indicate temperature,voltage,and ampearage shall be
> serviced and calibrated in accordance with the manufacturers written
> specification"
>
> Manivannan.
>
>
> On Fri, May 11, 2012 at 8:14 AM, mpk mpk <ranmi2007@gmail.com> wrote:
>
>> Dear Experts,
>>
>> Any where mentioned about welding machine calibration is required for
>> pipeline.need Reference.
>>
>> Thank you,
>> Yem Pee.
>>
>> --
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>>
>
>
>
> --
> MANIVANNAN.P
>
> --
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>
*T.SURESHKUMAR. B.E, M.B.A, NDT LEVE-II.,
QA/QC INSPECTOR (PIPING, WELDING,STRUCTURAL)
DODSAL ENGINEERING & CONSTRUCTION PTE LTD,
ABUDHABI,
UAE.
*
*
*
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Arunachalam.A,
Abu Dhabi
0097150-5257122
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