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API Spec 5B (R2015) Specification for Threading, Gauging and Thread Inspection of Casing, Tubing, and Line Pipe Threads, Fifteenth Edition
standard by American Petroleum Institute, 04/01/2008
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API SPECIFICATION 5B FIFTEENTH EDITION, APRIL 2008
EFFECTIVE DATE: OCTOBER 1, 2008
API SPECIFICATION 5B FIFTEENTH EDITION, APRIL 2008
EFFECTIVE DATE: OCTOBER 1, 2008
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Standards referenced herein may be replace by other international or national standards that can be shown to meet or exceed the requirements of the referenced standard.
This fifteenth edition of API Spec 5B contains the following changes to the previous edition:
Addendum 1, March 2004, and Errata, April 9, 1998, of the fourteenth edition are included in the text.
Added SR22 in Appendix D.
New metric tables added in Appendix E.
New metric drawings added in Appendix F.
Text formatted to a single column.
Moved Extreme-Line Casing to Appendix G.
Changed Pin Chamfer Angle from 65 to 60 (Agenda Item 3067).
Additional editorial items.
iii
Page
Scope 1
Coverage 1
Inspection 1
Other Requirements 1
References 1
General 1
Requirements 1
Definitions. 1
Thread Dimensions and Tolerances 2
Line Pipe, Round Thread Casing and Tubing, and Buttress Thread Casing 2
Thread Inspection 22
Line Pipe, Round Thread Casing and Tubing, and Buttress Thread Casing 22
Gauging Practice 36
Line Pipe, Round Thread Casing and Tubing, and Buttress Thread Casing 36
Gauge Specification 39
Line Pipe, Round Thread Casing and Tubing, and Buttress Thread Casing 39
API Gauge Certification 56
Line Pipe, Round Thread Casing and Tubing, and Buttress Thread Casing 56
Thread Marking 57
Appendix A Instructions for Shipment of Master Gauges 59
Appendix B Marking Instructions for API Licensees 61
Appendix C API Gauge Certification Agency Requirements 63
Appendix D Supplementary Requirements (Normative) 65
Appendix E Tables in International Standard Units 69
Appendix F Figures in International Standard Units 91
Appendix G Extreme-Line Casing 97
Figures
Line Pipe Thread Form 5
Basic Dimensions of Line Pipe Thread Hand-Tight Make-Up 5
Basic Dimensions of Casing Round Threads Hand-Tight Make-Up 8
Casing Round Thread Form 8
Basic Dimensions of Buttress Casing Threads Hand-Tight Make-Up 12
Buttress Casing Thread Form and Dimensions—for Casing Sizes 41/2 through 133/8 13
Buttress Casing Thread Form and Dimensions—for Casing Sizes 16 and Larger 14
Basic Dimensions of Tubing Round Threads Hand-Tight Make-Up 17
Tubing Round Thread Form 17
v
Typical External-Thread Taper Gauge 25
Typical Internal-Thread Taper Gauge for Threads in Sizes 41/2 and Larger 25
Typical Internal-Thread Taper Gauge for Threads in Sizes Smaller than 41/2 26
Typical Run-Out Gauge for Buttress Thread Casing 26
Typical Lead Gauges 28
Typical Thread Height Gauges 30
Typical Thread Height Gauge for Internal Threads in Nominal Sizes Smaller than 3 30
Typical Thread-Contour Microscope for Measuring Thread Angle and Checking Thread Form 31
Typical Single Dial Gauge for Buttress Threads 33
Typical Check Pieces for Setting Dial Gauges 33
Typical Machine for Checking Coupling-Thread Alignment 34
Typical Application of Coupling-Thread Alignment Gauge 35
Gauging Practice for Line Pipe Threads and Casing and Tubing Round Thread
Hand-Tight Assembly 37
Gauging Practice for Buttress Casing Threads Hand-Tight Assembly 37
Comparison of Line Pipe Gauges Made Subsequent to 1940 and Gauges Made Prior to 1940 40
Thread Gauge for Line Pipe and Round Thread Casing and Tubing 44
Thread Gauge for Buttress Casing 44
Gauge Thread Form for Line Pipe and Round Thread Casing and Tubing. 45
Gauge Thread Form and Dimensions for Buttress Casing 45
Gauge Thread Form and Dimensions for Buttress Casing 46
Bolt Circles and Back-Up Plate Dimensions for Line Pipe, Buttress Casing and Short or
Long Round Casing Master Plug Gauges 46
D1 Basic Dimension of Power Tight Make-Up 65
D2 SR22 Casing Round Thread Form 66
5M Basic Dimensions of Buttress Casing Threads Hand-Tight Make-Up 92
6M Buttress Casing Thread Form and Dimensions—for Casing Sizes 41/2 through 133/8 93
7M Buttress Casing Thread Form and Dimensions—for Casing Sizes 16 and Larger 94
D2M SR22 Casing Round Thread Form 95
G1 Machining Details—Sizes 5 through 75/8 104
G2 Machining Details—Sizes 85/8 through 103/4 105
G3 Box and Pin Entrance Threads—Sizes 5 through 75/8 106
G4 Product Thread Form—Sizes 5 through 75/8 107
G5 Box and Pin Entrance Threads—Sizes 85/8 through 103/4 108
G6 Product Thread Form—Sizes 85/8 through 103/4 109
G7 Gauging Practice for Extreme-Line Casing 110
G8 Bolt Circles and Back-Up Plate Dimensions for Extreme-Line Casing Master Plug Gauges 111
G9 Gauge Details—Size Designations 5 through 75/8 112
G10 Gauge Details—Size Designations 85/8 through 103/4 113
G11 Gauge Thread Form—Size Designations 5 through 75/8 114
G12 Gauge Thread Form—Size Designations 85/8 through 103/4 115
Tables
Line Pipe Thread Height Dimensions 6
Tolerances on Line Pipe Dimensions 6
Line Pipe Thread Dimensions 7
Casing Round Thread Height Dimensions 9
Tolerances on Casing Round Thread Dimensions 9
Casing Short-Thread Dimensions 10
Casing Long-Thread Dimensions 11
Tolerances on Buttress Casing Thread Dimensions 15
Buttress Casing Thread Dimensions 16
Tubing Round Thread Height Dimensions 18
Tolerances on Tubing Round Thread Dimensions 19
Non-Upset Tubing Thread Dimensions 20
External-Upset Tubing Thread Dimensions 20
External-Upset Long Round Thread Dimensions for Fiberglass Pipe 21
Integral-Joint Tubing Thread Dimensions 21
Round Nosed Ends 22
Compensated Thread Lengths for Measurements Parallel to the Taper Cone 28
Line Pipe Thread Gauge Dimensions 47
Short and Long Round Casing Thread Gauge Dimensions 48
Buttress Casing Thread Gauge Dimensions 49
Non-Upset Tubing Thread Gauge Dimensions 50
External-Upset Tubing Thread Gauge Dimensions 51
Integral-Joint Tubing Thread Gauge Dimensions 51
Gauge Thread Height Dimensions for Line Pipe 52
Gauge Thread Height Dimensions for Round Thread Casing and Tubing 52
Tolerances on Gauge Dimensions for Line Pipe 53
Tolerances on Gauge Dimensions for Round Thread Casing and Tubing 54
Tolerances on Gauge Dimensions for Buttress Casing 55
D1 Enhanced Leak Resistance LTC Thread Dimensions 67
D2 Dimensional Tolerances on SR22 Casing 8-Round Thread Dimensions 68
1M Line Pipe Thread Dimensions 70
2M Tolerances on Line Pipe Thread Dimensions 70
3M Line Pipe Thread Dimensions 71
4M Casing Round Thread Height Dimensions 72
5M Tolerances on Casing Round Dimensions 73
6M Casing Short-Thread Dimensions 74
7M Casing Long-Thread Dimensions 75
8M Tolerances on Buttress Casing Thread Dimensions 76
9M Buttress Casing Thread Dimensions 77
10M Tubing Round Thread Height Dimensions 77
11M Tolerances on Tubing Round Thread Dimensions 78
12M Non-Upset Tubing Thread Dimensions 79
13M External-Upset Tubing Thread Dimensions 79
14M External-Upset Long Round Thread Dimensions for Fiberglass Pipe 80
15M Integral-Joint Tubing Thread Dimensions 80
16M Round Nosed Ends 81
17M Compensated Thread Lengths for Measurements Parallel to the Taper Cone 81
D1M Enhanced Leak Resistance LTC Thread Dimensions 82
D2M Dimensional Tolerances on SR22 Casing 8-Round Thread Dimensions 83
G1M Extreme-Line Casing—Label 1—5 through 75/8 84
G2M Extreme-Line Casing—Label 1—85/8 through 103/4 86
G3M Inspection of Extreme-Line Threads and Seals with Dimensions and Tolerances 88
G1 Extreme-Line Casing—Sizes 5 through 75/8 116
G2 Extreme-Line Casing—Sizes 85/8 through 103/4 118
G3 Inspection of Extreme-Line Threads and Seals with Dimensions and Tolerances 120
G4 Gauge Dimensions for Extreme-Line Casing 123
G5 Tolerances on Gauge Dimensions for Extreme-Line Casing 124
Specification for Threading, Gauging and Thread Inspection of Casing, Tubing, and Line Pipe Threads
COVERAGE
This Specification covers dimensions and marking requirements for API Master thread gauges. Additional product threads and thread gauges as well as instruments and methods for the inspection of threads for line pipe, round thread casing, buttress casing, and extreme-line casing connections are included. It is applicable when so stipulated in the API standard governing the product. The inspection procedures for measurements of taper, lead, height, and angle of thread are applicable to threads having 111/2 or less turns per in. (111/2 or less turns per 25,4 mm). All thread dimensions shown without tolerances are related to the basis for connection design and are not subject to measurement to determine acceptance or rejection of product.
By agreement between the purchaser and manufacturer, the supplemental requirements for Enhanced Leak Resistance LTC in SR22 shall apply.
INSPECTION
Thread inspection applies at the point of manufacture prior to shipment, to inspection at any intermediate point, to inspection subse- quent to delivery at destination, and to inspection by inspectors representing the purchaser or the manufacturer. The manufacturer may, at his or her option, use other instruments or methods to control manufacturing operations; but acceptance and rejection of the product shall be governed solely by the results of inspection made in accordance with the requirements of this Specification.
OTHER REQUIREMENTS
The applicable product specification should be consulted for requirements not given herein.
GENERAL
This Specification includes by reference, either in total or in part, the most recent editions of the following standards. API
RP 5A3 Recommended Practice on Thread Compounds for Casing, Tubing and Line Pipe
RP 5B1 Gauging and Inspection of Casing, Tubing, and Line Pipe Threads
RP 5C1 Care and Use of Casing and Tubing Spec 5CT Specification for Casing and Tubing Spec 5L Specification for Line Pipe
ASME1
B1.3M Screw Thread Gauging Systems for Dimensional Acceptability—Inch and Metric Screw Threads
REQUIREMENTS
Requirements of other standards included by reference in this Specification are essential to the safety and interchangeability of the equipment produced.
defect: Imperfection of sufficient magnitude to warrant rejection of the product based on the stipulations of the applicable specification.
imperfection: Discontinuity or irregularity in the product detected by methods outlined in the applicable specification.
may: Used to indicate that a provision is optional.
1ASME International, 3 Park Avenue, New York, New York 10016, www.asme.org.
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