Design of Buried High Density Polyethylene (HDPE) Piping Systems

Delivered by ASME International Expert on Code Case N-755

This  2 day course provides training on the design and analysis of buried High Density Polyethylene (HDPE) Pipe, in accordance with the ASME Boiler and Pressure Vessel Code Case N-755.  The course covers all aspects of the design of buried HDPE Pipe including pressure design, soil loadings, thermal expansion loads, and seismic design requirements. In addition, the designs of coupled, buried HDPE and above ground steel piping systems are presented. The class includes two in-class piping design exercises as well as a complete set of handouts and identification of applicable reference documents.  

• Target Audiance
  
• Learning Outcomes
  
• Course Outline
  
• Facilitator

Target Audience

Members of engineering teams involved in the feasibility, design, fabrication, installation, operation, maintenance and inspection of HDPE piping systems. Engineers, technicians and draftsmen involved with design, procurement, inspection or installation of buried HDPE piping in new applications or the replacement of existing corroded steel piping systems.

Learning Outcomes

• The scope of Code Case N-755
• The relationship of Code Case N-755 to ASME BPVC
• HDPE piping design requirements and analysis methods as specified in Code Case N-755
• Calculation methods for soil springs and other need soil parameters
• Design of coupled buried HDPE and above ground steel piping systems

Course Outline

Background

• Piping Design to ASME BPVC
• ASME SWG for Polyethylene Pipe
• Relationship of Code Case N-755 to ASME BPVC
• Scope of Code Case N-755

Overview of Code Case N-755

• General Requirements
• Material
• Design
• Installation
• NDE    
• Pressure Test
• Stamping

Buried HDPE Pipe Design Requirements

• Design Loads and Failure Modes
• Mechanical Properties
• Demand Definition
• Capacity Evaluation

Buried HDPE Piping Analysis Methods

• Manual Methods
• Computer Methods
• Soil Spring Calculations

Integrated Piping Design Methods

• Above Ground Piping Model
• Buried Steel Piping Model
• Buried HDPE Piping Model
• Steel Pipe -HDPE Interface Model
• Soil - Above Ground Pipe Interface Model
• Analysis
  • Deadweight
  • Thermal
  • Seismic
  • Combination Results
• Piping Design/Analysis
• Pipe Support Design/Analysis

Facilitator Information

Timothy M. (Tim) Adams is the Corporate Chief Mechanical Engineer and the General Manager of the Stevenson and Associates Cleveland Office. He has over 29 years’ experience in the design of Pressure Retaining Components to Section III and Section VIII of the ASME Boiler and Pressure Vessel Code and the B31 series Codes. In addition to his general management responsibilities, Mr. Adams is responsible for project management and provision of technical consulting and design work in the areas of design/analysis of piping systems; pressure vessels/tanks; mechanical equipment; structures; and application of Industry Consensus Codes and Standards for the electric power generation; petrochemical; and process industries and DOE nuclear waste processing facilities. Mr. Adams is an expert in the application of experience-based and traditional qualification techniques to the seismic evaluation of piping systems (above ground, buried, etc.) valves, component equipment and supports.

Mr. Adams has authored or co-authored over 50 technical publications in the Mechanical Design field.  He has earned his MS in Mechanical Engineering, from the University of Pittsburgh, and his BS in Mechanical Engineering, Summa Cum Laude, from the University of Pittsburgh.