ADB-08-08
On November 17, 2008, The Department of Transportation / Pipeline Hazardous Materials Safety Administration (PHMSA) issued Advisory Bulletin 08-08 (ADB-08-08) to hazardous liquid pipeline operators. The preamble to the bulletin also stated that PHMSA will conduct a workshop on internal corrosion on hazardous liquid pipelines in the first quarter of 2009. Information on this workshop will be posted on the PHMSA Web site.
PHMSA is advising operators of hazardous liquid transmission pipelines to review and analyze the following risk factors to determine if the commodity transported could corrode the pipeline:
- Type of commodity;
- Flow rate;
- Velocity;
- Operating Pressure;
- Topography;
- Amount of foreign material and/or contaminants present in the pipeline and/or commodity stream such as sand, silt, water, or other materials that could cause or promote internal corrosion;
- Amount of sulfur, salts, acids, hydrogen sulfide, carbon dioxide or other corrosive material present and corrosive effect based upon partial pressures of material in the pipeline;
- Presence of microbes;
- Temperature;
- Pipe configuration, design, and material specifications;
- Operating conditions, including but not limited to, steady state conditions, slack line conditions, upset conditions in the pipeline system, and upset conditions in upstream facilities such as refineries or processing facilities; and
- Any other circumstance or condition that could cause, promote, or increase the likelihood of internal corrosion.
Significant changes to any of the above risk factors and considerations must be promptly reflected in a revised analysis. In accordance with 49 CFR 195.589(c), you must maintain a record of the above analysis required by 49 CFR 195.579(a) in sufficient detail to demonstrate the adequacy of corrosion control measures or that corrosion control measures are not necessary. Records must be retained for at least five years and they must be readily available for inspection.