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ASME B1.20.1 Pipe Threads, General Purpose (Inch) , 1983
- Foreword
- Standards Committee Roster
- CONTENTS
- 1 Introduction [Go to Page]
- 1.1 Scope
- 1.2 Thread Designations
- 1.3 Sealing
- 1.4 Inspection
- 1.5 Appendix
- 1.6 Related Standard
- 2 American National Standard Pipe Thread Form [Go to Page]
- 2.1 Thread Form
- 2.2 Angle of Thread
- 2.3 Truncation and Thread Height
- 3 Specification for General Purpose Taper Pipe Threads, NPT [Go to Page]
- 3.1 Taper Pipe Threads
- 3.2 Tolerances
- 4 Specifications for Internal Straight Threads in Pipe Couplings, NPSC [Go to Page]
- 4.1 Straight Pipe Threads in Pipe Couplings
- 5 Specifications for Railing Joint Taper Pipe Threads, NPTR [Go to Page]
- 5.1 Railing Joints
- 6 Specifications for Straight Pipe Threads for Mechanical Joints; NPSM, NPSL, NPSH [Go to Page]
- 6.1 Straight Pipe Threads
- 6.2 Free-Fitting Mechanical Joints for Fixtures, NPSM
- 6.3 Loose-Fitting Mechanical Joints With Locknuts, NPSL
- 6.4 Loose-Fitting Mechanical Joints for Hose Coupling, NPSH
- 7 Gages and Gage Tolerances for American National Standard Pipe Threads [Go to Page]
- 7.1 Design of Gages
- 7.2 Classes of Gages
- 7.3 Gage Tolerances
- 7.4 Relation of Lead and Angle Deviations to Pitch Diameter Tolerances of Gages
- 8 Gaging of Taper Pipe Threads [Go to Page]
- 8.1 Gaging External Taper Threads
- 8.2 Gaging Internal Taper Threads
- 8.3 Gaging Practice
- 8.4 Gaging Chamfered, Countersunk, or Recessed Threads
- 9 Gaging of Straight PipeThreads [Go to Page]
- 9.1 Types of Gages
- 9.2 Gage Dimensions
- Figures [Go to Page]
- 1 Basic Form of American National Standard Taper Pipe Thread
- 2 American National Standard Taper Pipe Threads for Pressure-Tight Joints. NPT
- 3 American National Standard Taper Pipe Thread Notation
- 4 NPT Standard Taper Pipe Thread Plug and Ring Cages
- 5 Suggested Form of Gage Thread
- 6 Gaging External Taper Threads With Ring Gage
- 7 Gaging Internal Taper Threads
- 8 Gaging of Chamfered Threads
- Tables [Go to Page]
- 1 Limits on Crest and Root Truncation of American National Standard External and Internal Taper Pipe Threads, NPT
- 2 Basic Dimensions of American National Standard Taper Pipe Thread, NPT
- 3 Tolerances on Taper, Lead, and Angle of Pipe Threads, NPT
- 4 Dimensions, Internal Straight Threads in Pipe Coupling, NPSC
- 5 Dimensions of External and Internal Taper Pipe Threads for Railing Joints, NPTR
- 6 Dimensions of External and Internal Straight Pipe Threads for Fixtures, NPSM
- 7 Dimensions, External and Internal Straight Pipe Thread for Locknut Connections, NPSL
- 8 Basic Dimensions of Threaded Plug and Ring Gages for National American National Standard Taper Pipe Threads, NPT
- 9 Tolerances for American National Standard Working Taper Pipe Thread Plug and Ring Gages, NPT
- 10 Diameter Equivalent of Deviation in Half Included Angle of Thread for Tools and Gages
- 11 Diameter Equivalent of Deviation in Lead for Tools and Gages
- Appendix [Go to Page]
