Asme Section Ix Code Book May 2026

| Variable | Example | |----------|---------| | Process (SMAW to GTAW) | Change | | Base metal group (P-1 to P-3) | Change | | Thickness (beyond qualified range) | Change | | Heat input (for impact-tested) | Change | | Filler metal classification | Change | Change allowed without new PQR, just update WPS.