ASME B1.20.2M 2006 R2011

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ASME B1.20.2M Pipe Threads, 60 deg. General Purpose (Metric) – Reaffirmed: 2011

Published By	Publication Date	Number of Pages
ASME	2006	32

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ASME B.1.20.2M-2006; Pipe Threads, 60 deg, General Purpose (Metric) Standard is a metric conversion of the widely accepted ASME B1.20.1-1983; Pipe Threads, General Purpose (Inch) Standard NPT Taper Pipe Threads. The ASME B1 Standards Committee prepared this metric translation in order to encourage global use and acceptance of the NPT Pipe Thread. For ease of use, product threads and gauging are contained in the Standard. There are no changes to the thread or gage designs.

PDF Catalog

PDF Pages	PDF Title
5	CONTENTS FIGURES TABLES NONMANDATORY APPENDICES
6	FOREWORD
7	COMMITTEE ROSTER
8	CORRESPONDENCE WITH THE B1 COMMITTEE
9	1 SCOPE 2 REFERENCE AND SYMBOLS 2.1 Reference Standard 2.2 Symbols 3 TAPER PIPE THREAD FORM 3.1 Thread Profile 3.2 Angle of Thread 3.3 Truncation and Thread Height
10	1 Standard Taper Pipe Thread Notation
11	2 Basic Profile of Standard Taper Pipe Thread
12	1 Limits on Crest and Root Truncation of Standard External and Internal Taper Pipe Threads
13	3 Standard Taper Pipe Threads for Pressure-Tight Joints Internal Thread
14	2 Basic Thread Dimensions
16	4 SPECIFICATIONS FOR GENERAL PURPOSE TAPER PIPE THREADS, NPT 4.1 Taper Pipe Threads, NPT 4.1.1 Thread Designation. 4.1.2 Thread Dimensions. 4.1.3 Taper of Thread. 4.1.4 Engagement Between External and Internal Taper Threads. 4.2 Tolerances 4.2.1 Manufacturing Tolerances on Product. 4.2.2 Tolerances on Thread Elements. 5 SPECIFICATIONS FOR INTERNAL PARALLEL THREADS IN PIPE COUPLINGS, NPSC 5.1 Parallel Pipe Threads in Pipe Couplings 5.1.1 Thread Designation. 5.1.2 Thread Dimensions. 6 GAUGES AND GAUGE TOLERANCES FOR STANDARD PIPE THREAD, NPT 6.1 Design of Gauges
17	3 Tolerances on Taper, Lead, and Angle of Pipe Threads, NPT 4 Dimensions, Internal Parallel Threads in Pipe Couplings, NPSC
18	6.1.1 Standard Type Gauges. 6.1.2 Marking of Gauges. 6.2 Classes of Gauges 6.2.1 Master Gauges. 6.2.2 Working Gauges. 6.3 Gauge Tolerances 6.3.1 Master Gauge Tolerances. 6.3.2 Working Gauge Tolerance. 6.4 Relation of Lead and Angle Variations to Pitch Diameter Tolerance of Gauges
19	7 GAUGING OF TAPER PIPE THREAD, NPT 7.1 Gauging External Taper Threads 7.2 Gauging Internal Taper Threads 7.3 Gauging Practice 7.3.1 Seating of Gauge. 7.3.2 Supplemental Gauging. 7.4 Treatment of Chamfers, Recesses, Counterbores, and Thread Extensions 7.5 Acceptability 8 GAUGING OF NPSC PARALLEL PIPE THREADS
20	4 NPT Standard Taper Pipe Thread Plug and Ring Gauges 5 Suggested Form of Gauge Thread 6 Gauging External Taper Threads With Ring Gauge 7 Gauging Internal Taper Threads With Plug Gauge
21	5 Basic Dimensions of Plug and Ring Gauges for NPT Threads
22	6 Tolerances for NPT Working Plug and Ring Gauges
24	7 Diameter Equivalent of Variation in Lead for Tools and Gauges
25	8 Diameter Equivalent of Variation in Half Included Angle of Thread for Tools and Gauges
26	8 Gauging of Chamfered Threads
27	A The Turns of Engagement Method of Verifying Product Threads
28	B Tap Drill Sizes