Wednesday, December 28, 2011

[MW:13349] Oxygen level in purging gas during welding of duplex stainless steel

Hi friends,
 
I have 2 different specification which the requirements are different for the oxygen level in purging gas during the welding of super duplex pipe.
 
One of them calls for 25 ppm (0.0025%) another one calls for 5000 ppm (0.5%). Could you please shed some light on this as which one is up to the standard with references?
 
Thanks,
Martin.
By -

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

Re: [MW:35686] HDPE WPS

Refer ASME SEC IX  There is separate chapter for Plastic welding . Based on that you have to prepare  Sent from my iPhone On 21 Jun 2025, at...

  • 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...