Pipeline and Hazardous Materials Safety Administration January 8, 2008 – Federal Register Recent Federal Regulation Documents

Pipeline Safety: Polyamide-11 (PA-11) Plastic Pipe Design Pressures
Document Number: E8-33
Type: Proposed Rule
Date: 2008-01-08
Agency: Pipeline and Hazardous Materials Safety Administration, Department of Transportation
PHMSA proposes to revise the Federal pipeline safety regulations to allow certain thermoplastic pipelines made from new Polyamide-11 (PA-11) pipe to be designed using a higher design factor and to raise the design pressure limit for the same pipelines. Design pressure calculations and design pressure limitations for all other thermoplastic pipes (PE-polyethylene, PB-polybutylene, PVC-polyvinyl chloride, etc.) would remain unchanged. These rule changes would allow pipeline operators to operate certain pipelines constructed of new PA- 11 pipe at higher operating pressures than currently allowed by the existing rules. This would allow pipeline operators to take advantage of the strength characteristics of PA-11 pipe.