Welding Inspector & WPS (PART 1)

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First glances of Welding Codes Application:

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Initial Concepts of Variables:

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Supplementary variable will become ESSENTIAL in case of Impact test to be carried out, the impact toughness test will be required according to SPEC/CODE/RULE requirement.

B2.1 VARIABLES

D1.1 VARIABLES

ASME IX VARIABLES

The Changes of Variables affecting to WPS qualification status:

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Essential/Supplemental changed –> Re-PQR and WPS, NonEssential changed –> Rewrite WPS
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PART 1 : JOINT DESIGN VARIABLES

KEY NOTES:

*  Groove changes mean : U —> V, J —> V, X —> V ect., (excluded the T-Y-K Jacket joints)

*  CJP groove mean of using Backing/Backgouging 

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D1.1 (31/32/34) ESSENTIAL VARIABLES, Normally, we do CJP both side welding to cover all case (see note d in table 4.2 and definition of CJP groove).

* Groove weld is different with Fillet weld (Weld type including Groove & Fillet)

WPS with Groove type can cover the Fillet, but Fillet WPS can cover only Fillet weld

ASME IX FILLET JOINT QUALIFICATION

B2.1 FILLET JOINT QUALIFICATION

D1.1 FILLET JOINT QUALIFICATION

* ONLY FOR AWS D1.1 (33) – ROOT FACE/GAP,BEVEL ANGEL5.pngNot that the others joint design change like Excessive Root Gap (>5mm – backing ,>8mm – buildup or increase leg size ect.,) is relating to Practical correcting solutions to matching the WPS designate, NOT to Re-qualify the WPS.

BUT HOW ABOUT ASME IX WPS FOR BELOW CASE:

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Solutions:

1 – REVISING WPS (IN CASE OF SERIOUS CONCEPTS: HARDNESS/CORROSION/IMPACT)

2 – TECHNICAL QUERY OR MOCK-UP TEST TO BE PRESENT (IN CASE OF SERIOUS CONCEPTS: HARDNESS/CORROSION-NACE COMPLIANCE/IMPACT/FN CONTENT).

Duplex SS is susceptible to embrittlement Heat temp’ (600-800*C) which relating to metallurgy aspect and will be discussed in Metallurgy topic.

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Actually base on experiences, the changes in Hardness will be in tolerance regardless number of welding pass in case of welding with correct WPS parameter. (DSS above/CS below)

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