Supplementary Essential Variables

[udaya bhaskar]

Dear Experts,

Please Can you clarify to me the above highlighted point "T limits toughness". 

This point Where is and when is applicable these Supplementary Essential Variables in WPS.
Will This Clause be applicable in water station piping WPS at Gulf countries?
Material : API5L-PSL2

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With Regards

Udaya bahaskar.D

+919676270121

[Vishwas Keskar]

This clause is applicable when Notch Toughness  is required in production welding  .

Pl. check the design drawing.

If Design Data is specifying that Notch Toughness Testing  'REQUIRED " then it is required 

Pl. check 

As per my knowledge , for water station piping , it is not required as low temperature application  is not there .

Check the drawing .

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[Perumal Govindan]

Please check the MDMT / PMS /piping class / data sheet, then decide the notch toughness requirement.

Note: PSL2 is notch toughness tested material and confirm with the mill test certificate.

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[Kundan Ahirao]

This clause is applicable when Notch toughness tesing is specified.

Please Refer  ASME Sec IX clause No. 251.2- Essential variables are those in which a change, as described in the specific

variables, is considered to affect the mechanical proper�ties of the weldment, and shall require requalification of the WPS.

Supplementary essential variables are required for me�tals for which other Sections specify toughness tests and are in addition to the essential variables for each welding

process.

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Regards,
Kundan Ahirao

[Kannayeram Gnanapandithan]

If impact is required, this clause is applicable, otherwise no

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