Many large refining companies maintain enterprise-wide access to these PDFs.
However, relying on outdated or illegal copies is dangerous. RP0472 has been reaffirmed with minor updates. Using a 15-year-old photocopy could mean missing critical changes to maximum allowable hardness (typically ≤200 HV10 or 22 HRC for most refinery services). nace rp0472 pdf
The standard outlines specific technical controls to manage the hardness of the heat-affected zone (HAZ) and the weld metal itself. nace rp0472 pdf