United States Department of Transportation
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Regulatory assessment with regulatory flexibility analysis and paperwork reduction act analysis : draft regulatory evaluation : Notice of Proposed Rulemaking -- Pipeline Safety : Polyamide-11 (PA-11) plastic pipe design pressures
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2007-06-01
[PDF-79.32 KB]
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Alternative Title:Draft regulatory impact assessment
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NTL Classification:NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;NTL-LAWS AND REGULATIONS-LAWS AND REGULATIONS;
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Abstract:The Pipeline and Hazardous Materials Safety Administration (PHMSA) is proposing changes to the Federal pipeline safety regulations in 49 CFR Part 192, which cover the transportation of natural gas by pipeline. Specifically, PHMSA is proposing to change the design pressure limits in Sections 192.121 and 192.123 for certain pipes made of Polyaminde-11 (PA-11), a thermoplastic material. The changes would allow new PA-11 pipelines with a nominal pipe size (IPS) of 4 inches or less and a standard dimension ratio1 (SDR) of 11 to be designed using a design factor of 0.40 (in lieu of the currently stipulated 0.32) in the plastic pipe design formulas in Section 192.121. The design pressure limit in Section 192.123 would be raised from 100 psig to 200 psig for new 4- inch IPS or less, SDR-11, PA-11 pipelines in distribution systems and in class 3 and 4 locations. This would allow design pressures up to those calculated using the formulas in Section 192.121, but not greater than 200 psig. All other design pressure limitations would remain unchanged. In this report, the benefits and costs of the proposed regulatory changes are examined. Additionally, the report includes the analyses required by the Regulatory Flexibility Act and the Paperwork Reduction Act.
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