(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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4	CONTENTS
8	FOREWORD
9	ASME NPPS COMMITTEE Nonmetallic Pressure Piping Systems
12	CORRESPONDENCE WITH THE NPPS COMMITTEE
14	INTRODUCTION
16	Chapter 1 Scope and Definitions 1-1 SCOPE 1-2 GENERAL
17	1-2.1 Content and Coverage 1-3 DEFINITIONS
22	1-4 ABBREVIATIONS 1-5 STATUS OF APPENDICES
23	Tables Table 1-4-1 Abbreviations
24	Table 1-5-1 Status of Appendices
25	Chapter 2 Design 2-1 DESIGN CONDITIONS 2-1.1 General 2-1.2 Pressure, Temperature, and Other Loads
26	2-2 DESIGN CRITERIA 2-2.1 General 2-2.2 Pressure–Temperature Ratings for Piping Components
27	2-2.3 Allowable Stress Values and Other Stress Limits for Piping Components
28	2-2.4 Design Allowances
29	2-3 PRESSURE DESIGN OF PIPING COMPONENTS 2-3.1 Criteria for Pressure Design of Piping Components 2-3.2 Pressure Design of Components
30	Table 2-3.2.2-1 Geometric Shape Rating (GSR) for HDPE Fittings
31	Figures Figure 2-3.2.2-1 Nomenclature for 90-deg Mitered Elbows Table 2-3.2.2-2 Design Factor (DF)
32	2-3.3 Analysis of Piping Components Table 2-3.2.2-3 Pressure Rating (PR) at 23°C (73°F)
33	Figure 2-3.2.4-1 Tapered Transition Joint
35	2-4 OTHER DESIGN CONSIDERATIONS 2-4.1 Design of Pipe Support Elements
36	2-4.2 Moduli of Elasticity
37	Chapter 3 Materials 3-1 GENERAL 3-2 MATERIALS AND SPECIFICATIONS 3-2.1 Listed Materials 3-2.2 Unlisted Materials 3-2.3 Unknown Thermoplastic Materials 3-2.4 Size or Thickness 3-2.5 Limitations on Materials
38	3-2.6 Marking of Thermoplastic Materials or Products 3-3 THERMOPLASTIC COMPOSITE MATERIALS
39	Chapter 4 Standards for Piping Components 4-1 GENERAL 4-2 REFERENCE DOCUMENTS 4-2.1 Standards and Specifications 4-2.2 Additional References
40	Table 4-2.1-1 Specifications and Standards
46	Table 4-2.1-2 Procurement Information
47	Chapter 5 Fabrication, Assembly, and Erection 5-1 GENERAL 5-1.1 Thermoplastic Joining Methods 5-1.2 Responsibilities 5-1.3 Thermoplastic Joining Qualifications
48	5-2 JOINING THERMOPLASTIC PIPING COMPONENTS BY HEAT FUSION OR SOLVENT-CEMENT WELDING 5-2.1 Processes and Procedures for Thermoplastic Joining 5-2.2 Thermoplastic Joining Using Heat-Fusion Methods
49	5-2.3 Thermoplastic Joint Properties for Heat Fusion
50	5-2.4 Application-Specific Joint Requirements for Heat Fusion 5-2.5 Requirements for Thermoplastic Pipe and Fittings Joints Using Heat Fusion 5-2.6 Thermoplastic Joining Using Solvent-Cement Welding Methods 5-2.7 Thermoplastic Joint Design and Properties for Solvent-Cement Welding 5-2.8 Requirements for Thermoplastic Pipe and Fittings Joints Using Solvent-Cement Welding
51	5-2.9 Noncontact Heat Joining Methods 5-2.10 Records 5-3 PROCEDURE QUALIFICATION
52	5-4 OPERATOR QUALIFICATION Table 5-3-1 Qualification for Thermoplastic Joining Procedures
53	Table 5-4-1 Qualification for Thermoplastic Fusion Equipment Operators, Welders, and Installers
54	Chapter 6 Inspection, Examination, and Testing 6-1 INSPECTION 6-1.1 Responsibility for Inspection 6-1.2 Rights of the Owner’s Inspector 6-1.3 Qualifications of the Owner’s Inspector 6-2 EXAMINATION 6-2.1 Responsibility for Examination
55	6-2.2 Examination Requirements 6-2.3 Extent of Required Examination
56	6-2.4 Supplementary Examination 6-2.5 Examination Personnel 6-2.6 Examination Procedures 6-2.7 Types of Examination
57	6-3 TESTING 6-3.1 Required Leakage Test 6-3.2 General Requirements for Leakage Tests
58	6-3.3 Preparation for Leakage Test 6-3.4 Hydrostatic Leakage Test
59	6-3.5 Pneumatic Leakage Test 6-3.6 Initial Service Leakage Test
60	Chapter 7 Use of Metallic Piping Lined With Thermoplastics 7-1 GENERAL 7-2 STANDARDS 7-3 MATERIALS 7-4 DESIGN CONSIDERATIONS 7-4.1 Qualifications of the Designer
61	7-4.2 Design Pressure 7-4.3 Design Temperature 7-4.4 Design Criteria
63	Table 7-4.4.4.3-1 Increased Casting Quality Factor, Ec Table 7-4.4.4.3-2 Acceptance Levels for Castings
64	Figure 7-4.4.4.4-1 Stress Range Factor, f
66	Table 7-4.4.10-1 Working Pressures for Metallic Flanges and Fittings Lined With Thermoplastics
68	7-5 FABRICATION AND INSTALLATION 7-5.1 Assembler Qualifications 7-5.2 Recommended Installation Practices 7-5.3 Flangeless or Reduced-Flanged Piping
69	7-5.4 Connections of Thermoplastic-Lined Metallic Piping to Other Types of Piping 7-5.5 Cold-Temperature Installation 7-5.6 Field Fabrication Certification 7-5.7 Bonder Qualification for Fusion Welding Liners 7-5.8 Cleaning Procedures 7-5.9 External Paint Systems 7-5.10 Buried Piping
70	7-6 STORAGE AND HANDLING GUIDELINES 7-7 INSPECTION, EXAMINATION, AND TESTING 7-7.1 Inspection
71	7-7.2 Examination
73	7-7.3 Testing
76	Chapter 8 Multilayered Reinforced Thermoplastic Piping Systems 8-1 SCOPE 8-2 APPLICABILITY 8-3 DESIGN 8-3.1 Project Application Information 8-3.2 Maximum Allowable Operating Pressure
77	8-3.3 Minimum Allowable Operating Pressure 8-3.4 Minimum Qualified Pressure 8-3.5 Surge Pressure 8-3.6 Maximum Allowable Operating Temperature 8-3.7 Maximum Qualified Temperature 8-3.8 Minimum Allowable Operating Temperature 8-3.9 Minimum Qualified Temperature 8-3.10 Temperature Fluctuations 8-3.11 Design Life and Qualified Life 8-3.12 Fittings and Joints 8-3.13 System Supports
78	8-3.14 Minimum Operating Bend Radius 8-3.15 Fluid Composition 8-3.16 Sour Service 8-3.17 Additional Design Considerations 8-4 FABRICATION, ASSEMBLY, AND ERECTION 8-4.1 Fabrication 8-4.2 Assembly and Erection
79	8-4.3 Installation
80	8-4.4 Hydrostatic Test 8-5 EXAMINATION, INSPECTION, AND TESTING 8-5.1 General 8-5.2 Examination
81	8-5.3 Inspection 8-5.4 Testing
82	MANDATORY APPENDIX I FUSING AND ELECTROFUSING OF POLYAMIDE-11 THERMOPLASTIC PIPING; AND FUSING OF POLYPROPYLENE, POLY(VINYLIDENE FLUORIDE), AND POLY(TETRAFLUOROETHYLENE) PLASTIC LINERS OF LINED STEEL PIPE I-1 GENERAL REQUIREMENTS I-2 SCOPE I-3 JOINING PROCEDURE I-4 JOINING PROCEDURES QUALIFIED BY EMPLOYERS OR AGENTS
83	I-5 EVALUATION OF TEST SPECIMENS I-6 SIZE RANGE FOR SPECIMENS I-7 TEST METHODS REQUIRED FOR PROCEDURE QUALIFICATION
85	Figure I-7.7-1 Instruction on Preparing and Cutting Electrofusion Coupling for Crush Test
86	Figure I-7.8-1 Joint Crush Specimens in Vise I-8 ESSENTIAL VARIABLES FOR FUSING PA-11
87	Table I-8-1 Essential Variables for Heat-Fusing JPS for PA-11 Table I-8-2 Essential Variables for Electrofusion JPS for PA-11 Electrofusion Couplings
88	Table I-8-3 Essential Variables for Heat Fusion JPS for PP, PVDF, and PTFE/PFA Liners
89	Figure I-8.2-1 Polyethylene Pipe Butt-Fusion Joint O.D. Bead (Cross-Sectional View) I-9 VERIFICATION OF ESSENTIAL VARIABLES
90	Figure I-9.1-1 Cross-Sectional View of PA-11 Butt-Fusion Bead
91	Figure I-9.2-1 Cross-Sectional View of an Electrofusion Coupling Figure I-9.2-2 Fit-Up Gap
92	Table I-9.3-1 Steel Pipe Liner Thickness for PP, PVDF, and PTFE/PFA Liners
93	Figure I-9.3-1 Cross-Sectional View of a PP and PVDF Butt-Fusion Liner Bead Formed Against the Heater Plate I-10 JOINING PROCEDURE SPECIFICATION
94	I-11 QUALIFICATION OF A FUSING JPS I-12 QUALIFICATION OF AN ELECTROFUSION JPS
95	I-13 FUSING OPERATOR QUALIFICATION
99	MANDATORY APPENDIX II THREADED THERMOPLASTIC CONNECTIONS II-1 SCOPE II-2 THREADED JOINT DESIGN
101	Table II-1.3-1 Pressure Ratings for Molded PVC and CPVC Threaded Adapters Table II-2.5.2-1 Pressure Ratings for PVC and CPVC Field-Threaded Pipe Ends
103	Figure III-3-1 Solvent-Cement-Weld Shrink-Back Appearance (Cross-Sectional View) MANDATORY APPENDIX III ACCEPTANCE CRITERIA FOR THERMOPLASTIC JOINTS III-1 SCOPE III-2 POLYETHYLENE (HDPE) BUTT-FUSED JOINTS III-3 PVC AND CPVC SOLVENT-CEMENT-WELDED JOINTS
104	MANDATORY APPENDIX IV STRESS INTENSIFICATION FACTORS AND FLEXIBILITY FACTORS
105	Table IV-1 Stress Intensification Factors, i, and Flexibility Factors, k, for High-Density Polyethylene
109	Figure V-1.1-1 Socket Configuration MANDATORY APPENDIX V ONE-PIECE THERMOPLASTIC FLANGES V-1 SCOPE V-2 DESIGN
110	Figure V-1.2-1 Threaded Configuration Figure V-2.3-1 One-Piece Thermoplastic Flange With Reinforcing Rings V-3 PROOF-TESTING REQUIREMENTS FOR ONE-PIECE THERMOPLASTIC FLANGES
111	V-4 SUBMITTAL INFORMATION FOR ONE-PIECE THERMOPLASTIC FLANGES
113	NONMANDATORY APPENDIX A COMPONENTS FOR THERMOPLASTIC LAP-JOINT FLANGE CONNECTIONS A-1 SCOPE A-2 GENERAL REQUIREMENTS FOR BACKUP RINGS FOR TLJF CONNECTIONS
114	Table A-2.1-1 NPS Backup Rings for Thermoplastic Pipe
116	Table A-2.1-2 Metric Backup Rings for Thermoplastic Pipe
117	Figure A-2.3-1 Contact Area Between Flange Adapter and Backup Ring Figure A-2.3-2 Plate Flange Adapter Figure A-2.3-3 Convoluted Backup Ring
118	A-3 PROOF-TEST REQUIREMENTS FOR TLJF CONNECTIONS A-4 DESIGN REQUIREMENTS FOR TLJF ADAPTERS
119	Table A-2.4-1 Solvent-Cement-Weld Socket PVC and CPVC Lap-Joint Flanges
120	Table A-2.4-2 PVC and CPVC Spigot (Spig) Flange
121	Table A-2.4-3 PVC and CPVC Threaded Lap-Joint Flange
122	Table A-2.4-4 Steel Backup Rings for ABS Flange Adapters
123	Table A-3-1 Proof-Test Requirements for TLJF Connections
124	Figure A-4.3.1-1 Thermoplastic Flange Adapter — Typical for PE, PP, and PVDF Butt-Fused Lap-Joint Flange Connections
125	Figure A-4.3.2-1 Typical ISO or DVS Metric Spigot Socket-Fusion Flange Adapters
126	Figure A-4.3.2-2 Typical ISO or DVS Metric Flange Adapters for Socket Fusing
127	Figure A-4.3.2-3 Special ISO or DVS Metric Butt-Fusion Flange Adapter for Higher-Pressure Connections
128	Table A-4.4-1 Full-Face ABS Socket Flange Adapter
129	Table A-4.4-2 ABS Socket Flange Adapter Table A-5.1-1 Acceptable Methods for Installing Thermoplastic Flange Adapters to Thermoplastic Pipe and Fittings A-5 METHODS OF INSTALLING FLANGE ADAPTERS ONTO THERMOPLASTIC PIPES AND FITTINGS
130	Figure A-5.2-1 Transistor Flange Arrangement Figure A-5.2-2 Solid PVDF Flange and Backup Ring to Thermoplastic-Lined Metal Pipe
131	Figure A-5.3-1 One-Piece Flange Figure A-5.3-2 Flange Adapter A-6 FLANGE-TO-FLANGE CONNECTIONS
132	Table A-7.2-1 Gasket Requirements for Thermoplastic Flanges A-7 GASKETS A-8 TIGHTENING OF BOLTS
133	Figure A-9.4-1 Drawings for Bolts With Nuts and Stud Bolts With Nuts A-9 WASHERS, BOLTS, NUTS, AND STUDS A-10 BOLTED JOINT ASSEMBLY RECORDS
134	NONMANDATORY APPENDIX B DESIGN REQUIREMENTS FOR BURIED PIPING B-1 INTRODUCTION
135	B-2 LOADS
136	Table B-2.2.2.1-1 Soil Pressure Under H-20 Load Without Impact Factor (Flexible Pavement or Unpaved Roads) Table B-2.2.2.1-2 Soil Pressure Under H-20 Load on Rigid Pavement With Impact Factor
137	B-3 PIPING ANALYSIS
139	Table B-4.2.1-1 Typical Soil Unit Weight B-4 SOIL
140	Table B-4.2.2-1 Eʹ Values for Typical Soils
141	Table B-4.2.2-2 Eʹ Values per Depth of Cover Table B-4.2.2-3 Native Soil Eʹ B-5 REFERENCES
142	Table B-4.2.2-4 Soil Support Factor, FS
143	NONMANDATORY APPENDIX C PRESSURE SURGE FROM FLUID TRANSIENT C-1 LIQUID FLUID FLOW C-2 WAVE VELOCITY C-3 PRESSURE SURGE
144	Table C-2-1 Pipe Wall Flexibility Reduction Factors, ψC
145	NONMANDATORY APPENDIX D MULTILAYERED REINFORCED THERMOPLASTIC PIPING SYSTEM(S) OPERATION, MAINTENANCE, AND REPAIR D-1 SCOPE D-2 GENERAL D-3 OPERATION D-4 MAINTENANCE D-5 REPAIR

Published By	Publication Date	Number of Pages
ASME	2018	146


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Standard Title	ASME NM.1-2018: Thermoplastic Piping Systems
Published Code	ASME
Publication Date	2018
Pages Count	146

ASME NM.1 2018

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