NACE RP‑0472 – “Standard Test Method for Determination of the Effect of Salt‑Water on the Tensile Strength of Coated Steel”
(often referenced as “NACE RP0472 PDF”) – Overview, Key Points, and How to Obtain It
If you are designing or repairing carbon steel weldments in wet H₂S service, do not rely on hardness alone – NACE RP0472 also requires controlling residual stress, preheat, interpass temperature, and proper filler metals. Always qualify welds with actual hardness testing on production welds or mock-ups. nace rp0472 pdf
Baseline Mechanical Testing
: PWHT is the most common method used to reduce residual stresses and temper the hardness of the HAZ. SP0472 provides guidance on when PWHT is mandatory based on the service environment (e.g., sour service). Base Metal & Filler Selection NACE RP‑0472 – “Standard Test Method for Determination
The NACE RP0472 standard, also known as "Recommended Practice for Inspecting and Repairing Buried Pipelines Using Smart Pigs" or more accurately "In-Line Inspection of Pipelines", provides guidelines and best practices for the in-line inspection (ILI) of pipelines using intelligent or "smart" pigs. This document is crucial for pipeline operators, inspection companies, and regulatory bodies to ensure the integrity and safety of pipeline systems. Base Metal and Weld Metal: 22 HRC (Rockwell C)
Materials: It specifically covers carbon steels classified as P-No. 1, Group 1 or 2, which have a minimum specified tensile strength of 485 MPa (70,000 psi) or less.