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ASME B1.20.2M Pipe Threads, 60 deg. General Purpose (Metric) - Reaffirmed: 2011, 2006
- CONTENTS
- FOREWORD
- COMMITTEE ROSTER
- CORRESPONDENCE WITH THE B1 COMMITTEE
- 1 SCOPE
- 2 REFERENCE AND SYMBOLS [Go to Page]
- 2.1 Reference Standard
- 2.2 Symbols
- 3 TAPER PIPE THREAD FORM [Go to Page]
- 3.1 Thread Profile
- 3.2 Angle of Thread
- 3.3 Truncation and Thread Height
- 4 SPECIFICATIONS FOR GENERAL PURPOSE TAPER PIPE THREADS, NPT [Go to Page]
- 4.1 Taper Pipe Threads, NPT [Go to Page]
- 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 [Go to Page]
- 4.2.1 Manufacturing Tolerances on Product.
- 4.2.2 Tolerances on Thread Elements.
- 5 SPECIFICATIONS FOR INTERNAL PARALLEL THREADS IN PIPE COUPLINGS, NPSC [Go to Page]
- 5.1 Parallel Pipe Threads in Pipe Couplings [Go to Page]
- 5.1.1 Thread Designation.
- 5.1.2 Thread Dimensions.
- 6 GAUGES AND GAUGE TOLERANCES FOR STANDARD PIPE THREAD, NPT [Go to Page]
- 6.1 Design of Gauges [Go to Page]
- 6.1.1 Standard Type Gauges.
- 6.1.2 Marking of Gauges.
- 6.2 Classes of Gauges [Go to Page]
- 6.2.1 Master Gauges.
- 6.2.2 Working Gauges.
- 6.3 Gauge Tolerances [Go to Page]
- 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
- 7 GAUGING OF TAPER PIPE THREAD, NPT [Go to Page]
- 7.1 Gauging External Taper Threads
- 7.2 Gauging Internal Taper Threads
- 7.3 Gauging Practice [Go to Page]
- 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
- FIGURES [Go to Page]
- 1 Standard Taper Pipe Thread Notation
- 2 Basic Profile of Standard Taper Pipe Thread
- 3 Standard Taper Pipe Threads for Pressure-Tight Joints Internal Thread
- 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
- 8 Gauging of Chamfered Threads
- TABLES [Go to Page]
- 1 Limits on Crest and Root Truncation of Standard External and Internal Taper Pipe Threads
- 2 Basic Thread Dimensions
- 3 Tolerances on Taper, Lead, and Angle of Pipe Threads, NPT
- 4 Dimensions, Internal Parallel Threads in Pipe Couplings, NPSC
- 5 Basic Dimensions of Plug and Ring Gauges for NPT Threads
- 6 Tolerances for NPT Working Plug and Ring Gauges
- 7 Diameter Equivalent of Variation in Lead for Tools and Gauges
- 8 Diameter Equivalent of Variation in Half Included Angle of Thread for Tools and Gauges
- NONMANDATORY APPENDICES [Go to Page]
- A The Turns of Engagement Method of Verifying Product Threads
- B Tap Drill Sizes [Go to Page]