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ASME NM.1-2018
M00050654
New product
ASME NM.1-2018 Thermoplastic Piping Systems
standard by ASME International, 05/31/2019
Full Description
(a)This Standard prescribes requirements for the design, materials, fabrication, erection, examination, testing, and inspection of thermoplastic piping systems.(b) Thermoplastic piping, as used in this Standard, includes pipe, flanges, bolting, gaskets, valves, fittings, special connecting components, and the pressure containing-portions of other piping components, whether manufactured in accordance with standards referenced in this Standard or specially designed. It also includes hangers and supports and other equipment items necessary to prevent overstressing the pressure-containing components.
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Thermoplastic Piping Systems
ASME Standards for Nonmetallic Pressure Piping Systems
AN A MERICAN NA TIONAL S T AND ARD
ASME NM.1-2018
ASME NM.1-2018
Thermoplastic
Piping Systems
ASME Standards for Nonmetallic Pressure Piping Systems
AN AMERICAN NATIONAL STANDARD
Two Park Avenue • New York, NY • 10016 USA
Date of Issuance: May 31, 2019
The next edition of this Standard is scheduled for publication in 2020. This Standard will become effective 6 months after the Date of Issuance.
ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard. Periodically certain actions of the ASME NPPS Committee may be published as Cases. Cases and interpretations are published on the ASME website under the Committee Pages at https://cstools.asme.org/ as they are issued.
Errata to codes and standards may be posted on the ASME website under the Committee Pages to provide corrections to incorrectly published items, or to correct typographical or grammatical errors in codes and standards. Such errata shall be used on the date posted.
The Committee Pages can be found at https://cstools.asme.org/. There is an option available to automatically receive an e-mail notification when errata are posted to a particular code or standard. This option can be found on the appropriate Committee Page after selecting “Errata” in the “Publication Information” section.
ASME is the registered trademark of The American Society of Mechanical Engineers.
This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large.
ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.
ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility.
Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.
ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals.
No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise,
without the prior written permission of the publisher.
The American Society of Mechanical Engineers Two Park Avenue, New York, NY 10016-5990
Copyright © 2019 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All rights reserved Printed in U.S.A.
CONTENTS
Foreword vii
Committee Roster viii
Correspondence With the NPPS Committee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Introduction xiii
Chapter 1 | Scope and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 1 |
1-1 | Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 1 |
1-2 | General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 1 |
1-3 | Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 2 |
1-4 | Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 7 |
1-5 | Status of Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 7 |
Chapter 2 | Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 10 |
2-1 | Design Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 10 |
2-2 | Design Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 11 |
2-3 | Pressure Design of Piping Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 14 |
2-4 | Other Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 20 |
Chapter 3 | Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 22 |
3-1 | General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 22 |
3-2 | Materials and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 22 |
3-3 | Thermoplastic Composite Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 23 |
Chapter 4 | Standards for Piping Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 24 |
4-1 | General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 24 |
4-2 | Reference Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 24 |
Chapter 5 | Fabrication, Assembly, and Erection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 32 |
5-1 | General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 32 |
5-2 | Joining Thermoplastic Piping Components by Heat Fusion or Solvent-Cement Welding . . | 33 |
5-3 | Procedure Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 36 |
5-4 | Operator Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 37 |
Chapter 6 | Inspection, Examination, and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 39 |
6-1 | Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 39 |
6-2 | Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 39 |
6-3 | Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 42 |
Chapter 7 | Use of Metallic Piping Lined With Thermoplastics . . . . . . . . . . . . . . . . . . . . . . . . . . | 45 |
7-1 | General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 45 |
7-2 | Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 45 |
7-3 | Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 45 |
7-4 | Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 45 |
7-5 | Fabrication and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 53 |
7-6 | Storage and Handling Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 55 |
7-7 Inspection, Examination, and Testing 55
Chapter 8 Multilayered Reinforced Thermoplastic Piping Systems 61
Scope 61
Applicability 61
Design 61
Fabrication, Assembly, and Erection 63
Examination, Inspection, and Testing 65
Mandatory Appendices
Fusing and Electrofusing of Polyamide-11 Thermoplastic Piping; and Fusing of Polypropylene, Poly(Vinylidene Fluoride), and Polytetrafluoroethylene Plastic Liners of
Lined Steel Pipe 67
Threaded Thermoplastic Connections 84
Acceptance Criteria for Thermoplastic Joints 88
Stress Intensification Factors and Flexibility Factors 89
One-Piece Thermoplastic Flanges 94
Nonmandatory Appendices
A | Components for Thermoplastic Lap-Joint Flange Connections . . . . . . . . . . . . . . . . . . . . . | 98 |
B | Design Requirements for Buried Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 119 |
C | Pressure Surge From Fluid Transient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 128 |
D | Multilayered Reinforced Thermoplastic Piping System(s) Operation, Maintenance, and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 130 |
Figures | ||
2-3.2.2-1 | Nomenclature for 90-deg Mitered Elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 16 |
2-3.2.4-1 | Tapered Transition Joint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 18 |
7-4.4.4.4-1 | Stress Range Factor, f . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 49 |
I-7.7-1 | Instruction on Preparing and Cutting Electrofusion Coupling for Crush Test . . . . . . . . . . | 70 |
I-7.8-1 | Joint Crush Specimens in Vise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 71 |
I-8.2-1 | Polyethylene Pipe Butt-Fusion Joint O.D. Bead (Cross-Sectional View) . . . . . . . . . . . . . . . | 74 |
I-9.1-1 | Cross-Sectional View of PA-11 Butt-Fusion Bead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 75 |
I-9.2-1 | Cross-Sectional View of an Electrofusion Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 76 |
I-9.2-2 | Fit-Up Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 76 |
I-9.3-1 | Cross-Sectional View of a PP and PVDF Butt-Fusion Liner Bead Formed Against the Heater Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 78 |
III-3-1 | Solvent-Cement-Weld Shrink-Back Appearance (Cross-Sectional View) . . . . . . . . . . . . . . | 88 |
V-1.1-1 | Socket Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 94 |
V-1.2-1 | Threaded Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 95 |
V-2.3-1 | One-Piece Thermoplastic Flange With Reinforcing Rings . . . . . . . . . . . . . . . . . . . . . . . . | 95 |
A-2.3-1 | Contact Area Between Flange Adapter and Backup Ring . . . . . . . . . . . . . . . . . . . . . . . . | 102 |
A-2.3-2 | Plate Flange Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 102 |
A-2.3-3 | Convoluted Backup Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 102 |
A-4.3.1-1 | Thermoplastic Flange Adapter — Typical for NPS (IPS) PE, PP, and PVDF Butt-Fused Lap-Joint Flange Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 109 |
A-4.3.2-1 | Typical ISO or DVS Metric Spigot Socket-Fusion Flange Adapters . . . . . . . . . . . . . . . . . . | 110 |
A-4.3.2-2 | Typical ISO or DVS Metric Flange Adapters for Socket Fusing . . . . . . . . . . . . . . . . . . . . | 111 |
A-4.3.2-3 | Special ISO or DVS Metric Butt-Fusion Flange Adapter for Higher-Pressure Connections . | 112 |
A-5.2-1 | Transistor Flange Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 115 |
A-5.2-2 | Solid PVDF Flange and Backup Ring to Thermoplastic-Lined Metal Pipe . . . . . . . . . . . . . | 115 |
A-5.3-1 | One-Piece Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 116 |
A-5.3-2 | Flange Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 116 |
A-9.4-1 | Drawings for Bolts With Nuts and Stud Bolts With Nuts . . . . . . . . . . . . . . . . . . . . . . . . | 118 |
Tables | ||
1-4-1 | Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 8 |
1-5-1 | Status of Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 9 |
2-3.2.2-1 | Geometric Shape Rating (GSR) for HDPE Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 15 |
2-3.2.2-2 | Design Factor (DF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 16 |
2-3.2.2-3 | Pressure Rating (PR) at 23°C (73°F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 17 |
4-2.1-1 | Specifications and Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 25 |
4-2.1-2 | Procurement Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 31 |
5-3-1 | Qualification for Thermoplastic Joining Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 37 |
5-4-1 | Qualification for Thermoplastic Fusion Equipment Operators, Welders, and Installers . . . | 38 |
7-4.4.4.3-1 | Increased Casting Quality Factor, Ec . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 48 |
7-4.4.4.3-2 | Acceptance Levels for Castings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 48 |
7-4.4.10-1 | Working Pressures for Metallic Flanges and Fittings Lined With Thermoplastics . . . . . . . | 51 |
I-8-1 | Essential Variables for Heat-Fusing JPS for PA-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 72 |
I-8-2 | Essential Variables for Electrofusion JPS for PA-11 Electrofusion Couplings . . . . . . . . . . . | 72 |
I-8-3 | Essential Variables for Heat Fusion JPS for PP, PVDF, and PTFE/PFA Liners . . . . . . . . . . | 73 |
I-9.3-1 | Steel Pipe Liner Thickness for PP, PVDF, and PTFE/PFA Liners . . . . . . . . . . . . . . . . . . . | 77 |
II-1.3-1 | Pressure Ratings for Molded PVC and CPVC Threaded Adapters . . . . . . . . . . . . . . . . . . . | 86 |
II-2.5.2-1 | Pressure Ratings for Molded PVC and CPVC Field-Threaded Pipe Ends . . . . . . . . . . . . . . | 86 |
IV-1 | Stress Intensification Factors, i, and Flexibility Factors, k, for High-Density Polyethylene . | 90 |
A-2.1-1 | NPS Backup Rings for Thermoplastic Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 99 |
A-2.1-2 | Metric Backup Rings for Thermoplastic Pipe . . . . . . . . . . . . . . . . . . . . . . |