New Technical Guide Helps Engineers Design HDPE Water Mains for Seismic Fault Crossings

IRVING, TX — The HDPE Municipal Advisory Board (MAB) has launched a new technical doc outlining design necessities for high-density polyethylene (HDPE) water mains crossing seismic faults. The 38-web page publication, MAB-10 2025: Design of HDPE Water Mains for Crossing Seismic Hazard, offers formulation, calculations, charts and evaluation describing how pipelines reply to strike-slip seismic occasions.

The doc enhances the beforehand launched MAB-9: Design of HDPE Water Mains for the Lateral Unfold Seismic Hazard, with each publications accessible free by the Plastics Pipe Institute website.

Engineering Steering for Seismic Pipeline Design

“As requested by a number of house owners and consultants, the Municipal Advisory Board developed this doc to help in the design of HDPE for the anticipated fault crossing seismic occasion,” acknowledged Camille George Rubeiz, P.E., F. ASCE, Co-Chair, HDPE Municipal Advisory Board, and Vice President for the Municipal & Industrial Division of the Plastics Pipe Institute.

The MAB serves as an unbiased, non-industrial adviser to the Municipal & Industrial Division of the Plastics Pipe Institute, the main North American commerce affiliation representing the plastic pipe business.

“In MAB-10 2025, easy relations are developed for the required wall thickness for an HDPE water predominant topic to the fault crossing seismic hazard,” he continued.

Understanding Seismic Hazards Affecting Buried Pipelines

In accordance to the report, two main seismic hazards have an effect on buried pipelines: wave propagation (WP) and everlasting floor deformation (PGD). The fault crossing hazard described in MAB-10 focuses on circumstances the place floor motion straight impacts a pipeline.

Design necessities outlined in the report present that wall thickness is influenced by website circumstances such as burial depth and soil unit weight, as nicely as the allowable pipe pressure and geometric traits of the fault. These embody the quantity of fault displacement and the angle at which the pipeline crosses the fault.

HDPE Pipe Efficiency and Set up Benefits

HDPE pipe is typically chosen for water infrastructure in difficult circumstances due to its flexibility and ductility. Warmth-fused pipe sections create a leak-free, monolithic pipeline that can higher accommodate floor motion in contrast with inflexible pipe supplies.

The materials additionally resists corrosion and is not topic to tuberculation, serving to keep long-time period water move capability. HDPE water mains can be put in utilizing a vary of trenchless and open-reduce building strategies, offering flexibility for municipal infrastructure tasks.

Trade Collaboration in Growing the Information

Growth of MAB-10 concerned a volunteer activity drive of engineers, utility professionals, contractors and business specialists. The effort was led by Michael O’Rourke, Professor Emeritus of Civil Engineering at Rensselaer Polytechnic Institute.

The publication is supposed to present engineers, utilities and infrastructure planners with sensible steerage for designing HDPE pipelines succesful of withstanding seismic fault crossing hazards.

MAB-10 plus different paperwork might be discovered at www.plasticpipe.org/MABpub.