Nace Rp 0391 Pdf

Overview — NACE RP 0391

NACE RP 0391 is a Recommended Practice published by NACE International (now AMPP) that gives guidance on evaluating, selecting, applying, and testing coatings for the internal protection of metallic pipelines and piping systems handling various fluids. It focuses on corrosion control inside pipelines (e.g., water, oil, gas, produced water) where internal coatings, linings, and auxiliary measures (pigging, corrosion inhibitors) are used to extend service life and reduce maintenance.

Disclaimer: This article is a summary and guide. It does not replace the full, authoritative text of AMPP SP0391 (formerly NACE RP 0391). For compliance, always refer to the latest official standard. The author and publisher are not liable for any misuse of information contained herein.

The primary objective of NACE RP 0391 is to provide a consensus-based framework for the selection of materials and the design of equipment used to handle concentrated sulfuric acid. nace rp 0391 pdf

. It is primarily used by engineers and maintenance personnel in the chemical process industries to select safe, cost-effective materials for systems handling sulfuric acid.

Introduction

1. AMPP Store (Formerly NACE Store)

The direct source. AMPP (The Association for Materials Protection and Performance) manages the NACE standards catalog.

: Widely used for storage tanks and pipes at these concentrations because it forms a protective ferrous sulfate ( cap F e cap S cap O sub 4 Overview — NACE RP 0391 NACE RP 0391

: High flow rates in pipes or agitation in tanks can physically "wash away" the iron sulfate layer, exposing fresh steel to the acid's bite. : The standard defines "ambient" as up to 50°C (120°F)

This standard provides critical guidelines for the design and selection of materials used to handle and store commercial concentrated sulfuric acid (90% to 100% ) at ambient temperatures up to It does not replace the full, authoritative text