Session: CS-07-03: Recent Developments in ASME Codes and Standards - 3

Paper Number: 86021

86021 - Technical Overview and Basis of the Design Sections of the NM.1 Standard 

With improvement in manufacturing processes and polymer science Thermoplastics have been used in an increasing range of piping applications. Thermoplastics have many advantages over steel piping in several areas including lower cost of production, high resistance to corrosion, and ease and lower costs of installation. While they are still primarily used in low pressure and temperature applications (P<100 psig, (0.69 MPa), T<100 F (60 C)) they can now be used in higher pressure and temperature applications. While ASME B31.1[1] and B31.3 [2] allow the use of the thermoplastics they provide very limited guidance and data for design, fabrication and implementation.In the spring of 2019, the ASME published the first edition of the NM.1, NM.2, and NM.3 standards. These standards are for the design of non-metallic pressure piping systems. The focus is thermoplastics (NM.1), glass-fiber reinforced thermoset resins (NM.2), and material data (NM.3). These standards were developed by the Non-Metallic Pressure Piping Standards Committee, reporting to the ASME Board on Pressure Technology. This paper provides an overview and the technical basis of the design sections of the NM.1 Standard. The focus is the basis design requirements for HDPE, PVC, CPVC, PP, and ABS resins. Also discussed are the mandatory and non-mandatory Appendices applicable to the NM.1 design section.

Presenting Author: Timothy Adams Jensen Hughes

Presenting Author Biography: Mr. Adams is an Engineer in the Independence Ohio of Jensen Hughes. He has over 45 years of experience in the design of pressure retaining components to Section III and Section VIII of the ASME Boiler and Pressure Vessel Code and the ASME B31 and NM series Piping Codes. Mr. Adams has extensive experience and knowledge in the areas of design, seismic design, analysis, construction, and inspection of piping systems; pressure vessels and tanks; mechanical equipment; support structures; and the application of industry consensus codes and standards for the electric power generation, petrochemical and process industries, and DOE nuclear waste processing facilities. He is an industry expert on the seismic design of piping systems and mechanical components. He is active in numerous ASME consensus code and standards committees that pertain to the design, construction, and qualification of mechanical and pressure retaining components. He is the Recipient of numerous ASME Awards including the 2017 ASME BPVC Section III, “SC-III Outstanding Service Award”, the 2020 ASME – QME, “QME Outstanding Service Award” and the ASME 2021 “B.F. Langer Nuclear Codes &amp; Standards Award”

Authors:

Timothy Adams Jensen Hughes
Lorenz Vetter Sargent & Lundy
Shen Fong Westinghouse Electric Co.