Tuesday, December 2, 2008

[MW:1375] Re: Calibration, Validation of welding machines as per BS 7570 standard.

Hi all,
Calibn - OK, Process- validation required in case of any change in essntial variables only.
Otherwise, most Codes do accept certain std processes for their work, if not, then validation would be definitely required.
Rgds,
S Vagal

--- On Mon, 1/12/08, Muni Andy <cmkfc07@gmail.com> wrote:
From: Muni Andy <cmkfc07@gmail.com>
Subject: [MW:1369] Re: Calibration, Validation of welding machines as per BS 7570 standard.
To: materials-welding@googlegroups.com
Date: Monday, 1 December, 2008, 4:52 PM

Dear Friends,
Welding equipments need calibration i e the ammeter and voltmeter is to be calibrated.Frequency is once in 3 months.
validation is required for the welding process and not for welding equipments.
Regrds,
C.Muniyandi

On Mon, Dec 1, 2008 at 11:43 AM, <kataiah@bilfal.com> wrote:

Dear friends,

I am not very clear about the words Calibration, Validation of welding equipments.

Calibration is defined in some of the literature as all the operations for the purpose of determining the value or errors of a measuring instruments. (Checking the measuring instruments correctness such as A, V meters)

where as Validation is defined as all the operations for the purpose of demonstrating that an item of Arc welding equipment or welding system complies with the operating specification for that welding equipment or syestem( Checking the correctness of equipment).

I seen many fabrication  shops  doing calibration not Validation.

BS 7575-2000  is also having titile  " Code of Practice for Validation of arc welding equipment".

Can any body  suggest me  wether welding equipment requires  Calibraion or Validation?

Regards

P.K



Be the first one to try the new Messenger 9 Beta! Click here. --~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---

By -

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

Re: [MW:35289] Welding consumable for S355J2WP material

S355 J2 WP  is a weathering structural steel  It has better atmospheric corrosion resistance. Use E 8018 - W1/W2  Electrodes This is regular...

  • Materails FAQs
    Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? ...
  • RE: [MW:5585] Buttering of weld joints
    Definition of buttering from ASME Section IX, QW/QB-492 Definitions:   Buttering:  the addition of material, by welding, on one or bot...
  • WELD AND WELDING SYMBOLS
    Section I. PRINT READING 3-1. GENERAL a. Drawings . Drawing or sketching is a universal language used to convey all necessary information to...