Control of Internal Corrosion in Steel Pipelines and Piping Systems - Item No. 21111

Abstract

This standard presents recommended practices for the control of internal corrosion in steel pipelines and piping systems used to gather, transport, or distribute crude oil, petroleum products, or natural gas.

This standard serves as a guide for establishing minimum requirements for management of internal corrosion in the following systems:

(a) Crude oil gathering and flow lines

(b) Crude oil transmission

(c) Hydrocarbon products

(d) Gas gathering and flow lines

(e) Gas transmission

(f) Gas distribution

(g) Storage systems

(h) Produced water lines

(i) Injection water lines

This standard does not designate specific practices for every situation because the complexity of systems precludes standardizing internal corrosion control practices.

This document does not cover internal cracking mechanisms, nor does it address steam lines.

Corrosion control of equipment such as tanks, vessels, processing units, valves etc. is outside the scope of this document.

This document does not specifically address corrosion resistant alloys (CRAs) or well tubulars.

Although many of the same principles could be applied to these materials and environments, there will be exceptions.

The internal corrosion control process described in this document is a continual feedback loop.

It begins with performing an internal corrosion threat assessment to identify relevant internal corrosion mechanisms and contributing factors for the pipeline/system, creating a corrosion control plan to evaluate, mitigate and monitor those threats, and utilizing information obtained from monitoring, inspection and other activities (e.g., maintenance) as feedback to update the identified threats and corrosion control plan.

Local government regulations or permits may dictate particular requirements related to implementation of various section of this standard.

The provisions of this standard should be applied under the direction of competent persons who, by reason of knowledge of the physical sciences and the principles of engineering and mathematics acquired by education or related practical experience, are qualified to engage in the practice of corrosion control on carbon steel piping systems.

Such persons may be registered professional engineers or persons recognized as corrosion specialists by organizations such as NACE, or engineers, scientists or technicians with suitable levels of experience, and their professional activities include internal corrosion control of buried carbon steel piping and pipeline systems