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Duplex Stainless Steel Welding: What ER2209 Ferrite Number Requirements

Technically detailed guide: FN 30-60 ferrite requirements, Ar+2%N2 shielding gas rationale, sigma-phase risk above 475°C, and why PWHT is contraindicated…

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Calculators
Pipe Weight Elbow Weight V-Groove Consumable Fillet Consumable Carbon Equivalent MIG Settings TIG Settings Dishend Weight

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Welding Processes
MIG, TIG, SMAW, SAW · 12 articles
Welding Metallurgy
Cracking, Phases, HAZ · 26 articles
ASME Codes & Standards
WPS, PQR, Section IX · 23 articles
Fabrication & Calculators
Weight, Consumables · 6 articles
Inspection & Testing
NDT, Charpy, Bend · 18 articles
Welding Parameters
Symbols, Joints, Electrodes · 7 articles
Career & Certification
CWI, CSWIP, AWS · 6 articles
Tools & Equipment
Helmets, Regulators · 6 articles
Special Materials
P91, Duplex, Sour Service · 21 articles
Quality & Management
5S, Six Sigma, FMEA · 6 articles

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ASME Section IX

Test your knowledge of welding qualifications, WPS, PQR, and essential variables as per ASME Section IX.

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ASME Section VIII Div 1

Challenge yourself on pressure vessel design, UG clauses, impact testing, and PWHT requirements.

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AWS / CSWIP 3.1

Prepare for your CSWIP or AWS CWI examination with targeted practice questions on visual inspection and NDT.

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