M00044242
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API Std 613 (R2007) API Standard 613, Special Purpose Gear Units for Petroleum, Chemical and Gas Industry Services, Fifth Edition
standard by American Petroleum Institute, 02/01/2003
API Std 613 covers the minimum requirements for special-purpose, enclosed, precision single- and double-helical one- and two-stage speed increasers and reducers of parallel-shaft design for petroleum, chemical and gas industry services. This standard is primarily intended for gear units that are in continuous service without installed spare equipment.
This standard includes related lubricating systems, controls, instrumentation, and other auxiliary equipment. API Std 613 is not intended to apply to gear units in general-purpose service, which are covered by API Std 677; to gears integral with other equipment, such as integrally geared compressors covered by Std 617 or Std 672; or to gears other than helical. Product Details
Edition: 5th Published: 02/01/2003 ANSI: ANSI Approved Number of Pages: 94 File Size: 2 files , 1.1 MB Product Code(s): C61305, C61305R, C61305R, C61305, C61305R, C61305 Note: This product is unavailable in Cuba, Iran, North Korea, Syria
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ANSI/API STANDARD 613
FIFTH EDITION, FEBRUARY 2003 ERRATA, DECEMBER 5, 2005
REAFFIRMED, AUGUST 2007
Downstream Segment
ANSI/API STANDARD 613
FIFTH EDITION, FEBRUARY 2003 ERRATA, DECEMBER 5, 2005
REAFFIRMED, AUGUST 2007
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Copyright © 2003 American Petroleum Institute
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iii
Page
GENERAL 1
Scope 1
Applications 1
Alternative Designs 1
Conflicting Requirements 1
Definition of Terms 1
Reference Publications 3
Standards 3
Units of Measure 3
BASIC DESIGN 3
General 3
Rating 5
Casings 8
Casing Connections 10
Gear Elements 11
Dynamics 13
Bearings and Bearing Housings 20
Lubrication 22
Materials 22
Nameplates and Rotation Arrows 23
ACCESSORIES 23
General 23
Couplings and Guards 23
Mounting Plates 24
Controls and Instrumentation 25
Piping and Appurtenances 26
Special Tools 26
INSPECTION, TESTING, AND PREPARATION FOR SHIPMENT 26
General 26
Inspection 26
Testing 28
Preparation for Shipment 30
VENDOR’S DATA 32
General 32
Proposals 32
Contract Data 33
APPENDIX A SPECIAL PURPOSE GEAR UNITS DATA SHEETS 35
APPENDIX B REFERENCES 45
APPENDIX C COUPLINGS FOR HIGH SPEED GEAR UNITS 47
APPENDIX D RATED LOAD CURVES FOR THRUST BEARINGS
WITH STANDARD 6 6 SHOES 49
APPENDIX E MATERIAL SPECIFICATIONS FOR SPECIAL PURPOSE
GEAR UNITS PAGE 53
APPENDIX F VENDOR DRAWING AND DATA REQUIREMENTS 55
APPENDIX G RESIDUAL UNBALANCE WORK SHEETS 61
APPENDIX H GEAR INSPECTION (INFORMATIVE) 73
APPENDIX I INSPECTOR’S CHECKLIST 77
APPENDIX J RATING COMPARISON API 613 VS. AGMA 2101 81
APPENDIX K SHAFT END SIZING METHOD 85
APPENDIX L TYPICAL MOUNTING PLATES 87
Tables
Driver Trip Speeds 3
Shaft Assembly Combinations 5
Minimum Gear Service Factors 6
Material Index Numbers and Maximum L/d Ratios 7
Allowable Bending Stress Number, Sa 7
Minimum Tubing Wall Thickness 9
Drain Pipe Sizes 10
Pitch Line Velocities 12
Casing Vibration Levels 20
Maximum Severity of Defects in Castings 27
Gear Unit Housings 54
Shafts, Pinions, and Gear Wheels 54
Fabricated Gears 54
Allowable Contact Stress Per API 82
Allowable Bending Stress Per API 82
AGMA Grade 1 Allowable Stress Numbers 83
Figures
Shaft Assembly Designations (for Parallel-shaft, Single-and
Double-helical One- and Two-stage Speed Increasers and Reducers) 4
Shaft Rotation Designations 5
Material Index Number, Through Hardened 7
Allowable Bending Stress Number, Sa 8
Typical Torsiograph Modification 13
Undamped Critical Speed Map 15
7A Typical Mode Shapes—SI Units 16
7B Typical Mode Shapes—Customary Units 16
8 Back-to-back Locked-torque Test (Typical) 31
C-1 Couplings for Gear Units 48
Rated Load Curves for Thurst Bearings with Standard 6 6 Shoes:
Outside Diameters from 5 in. – 8 in. 50
Rated Load Curves for Thrust Bearings with Standard 6 6 Shoes:
Outside Diameters from 9 in. – 15 in. 51
(Blank) Residual Unbalance Work Sheet 63
(Blank) Residual Unbalance Polar Plot Work Sheet 64
Sample Residual Unbalance Work Sheet for Left Plane 65
Sample Residual Unbalance Polar Plot Work Sheet for Left Plane 66
Sample Residual Unbalance Work Sheet for Right Plane 67
Sample Residual Unbalance Polar Plot Work Sheet for Right Plane 68
Work Sheet—Customary 69
Polar Plot—Customary 70
Work Sheet—SI 71
Polar Plot—SI 72
Tooth Alignment (Lead) Modification of Helical Pinion 74
Profile Modification 75
Mounting Plate with Subplates 87
Mounting Plate without Subplates 88
Special Purpose Gear Units for Petroleum, Chemical, and Gas Industry Services
This standard covers the minimum requirements for spe- cial-purpose, enclosed, precision single- and double-helical one- and two-stage speed increasers and reducers of parallel- shaft design for petroleum, chemical and gas industry ser- vices. This standard is primarily intended for gear units that are in continuous service without installed spare equipment. Gear sets furnished to this standard shall be considered matched sets.
Note: The purchase of a spare set of gear rotors or a complete gear unit does not mean that the equipment is spared.
This standard includes related lubricating systems, con- trols, instrumentation, and other auxiliary equipment. This standard is not intended to apply to gear units in general-pur- pose service, which are covered by API Std 677; to gears inte- gral with other equipment, such as integrally geared compressors covered by Std 617 or Std 672; or to gears other than helical.
Note: A bullet () at the beginning of a paragraph indicates that either a decision is required or further information is to be provided by the purchaser. This information should be indicated on the data sheets (see Appendix A); otherwise, it should be stated in the quota- tion request or in the order.
The following gear-driven applications may be covered by this standard:
Speed increasers, including those for centrifugal compres- sors, axial compressors, blowers, rotary positive displacement compressors, separators, and centrifugal pumps.
Speed reducers, including those for reciprocating com- pressors, rotary positive displacement compressors, centrifugal compressors, centrifugal pumps, extruders, gener- ators, and fans.
The vendor may offer alternative designs. Any exceptions to the standard including, alternate design differences from this standard, shall be clearly stated in the proposal as required by 5.2.1.
In case of conflict between this standard and the inquiry, the inquiry shall govern. At the time of the order, the order shall govern.
1
Terms used in this standard are defined in 1.5.1 through 1.5.38.
The bending stress number (S) corresponds to the likelihood of fatigue cracking at the tooth root filet. If this stress is excessive, it may lead to failure of the gear teeth.
The use of the word design in any term (such as design horsepower, design pressure, design temperature, or design speed) should be avoided in the purchaser’s specifica- tions. This terminology should be used only by the equipment designer and the manufacturer.
The gear service factor (SF) is the factor that is applied to the tooth pitting index and the bending stress number, depending on the characteristics of the driver and the driven equipment, to account for differences in potential overload, shock load, and/or continuous oscillatory torque characteristics.
A hunting tooth combination exists for mating gears when a tooth on the pinion does not repeat contact with a tooth on the gear wheel until it has contacted all the other gear wheel teeth.
Note: An appendix may be informative or normative as indicated.