Axial and Centrifugal Compressors and Expander-compressors

API STANDARD 617

EIGHTH EDITION, SEPTEMBER 2014

ERRATA 1, AUGUST 2016

Special Notes

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Copyright © 2014 American Petroleum Institute

Foreword

API 617 consists of the following parts, under the general topic “axial and centrifugal compressors and expander- compressors for special purpose applications handling gas or process air”:

• Part 1—General Requirements,

  
  

• Part 2—Nonintegrally Geared Centrifugal and Axial Compressors,

  
  

• Part 3—Integrally Geared Centrifugal Compressors,

  
  

• Part 4—Expander-compressors.

Users of this standard should not rely exclusively on the information contained in this document. Sound business, scientific, engineering, and safety judgment should be used in employing the information contained herein.

Shall: As used in a standard, “shall” denotes a minimum requirement in order to conform to the specification.

Should: As used in a standard, “should” denotes a recommendation or that which is advised but not required in order to conform to the specification.

Nothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent.

This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard. Questions concerning the interpretation of the content of this publication or comments and questions concerning the procedures under which this publication was developed should be directed in writing to the Director of Standards, American Petroleum Institute, 1220 L Street, NW, Washington, DC 20005. Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.

Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least every five years. A one-time extension of up to two years may be added to this review cycle. Status of the publication can be ascertained from the API Standards Department, telephone (202) 682-8000. A catalog of API publications and materials is published annually by API, 1220 L Street, NW, Washington, DC 20005.

Suggested revisions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW, Washington, DC 20005, standards@api.org.

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Contents

Part 1—General Requirements

Page

1. Scope 1

2. Normative References 1

3. Terms, Definitions, and Abbreviations 4

   1. Terms and Definitions 4

   2. Abbreviations 11

4. General 13

   1. Dimensions and Units 13

   2. Statutory Requirements 13

   3. Unit Responsibility 13

   4. Basic Design 14

   5. Materials 17

   6. Casings 22

   7. Rotating Elements 30

   8. Dynamics 33

   9. Bearings and Bearing Housings 52

   10. Shaft End Seals 53

   11. Integral Gearing 56

   12. Nameplates and Rotation Arrows 56

5. Accessories 57

   1. Drivers and Gearing 57

   2. Couplings and Guards 57

   3. Lubrication and Sealing Systems 58

   4. Mounting Plates 58

   5. Controls and Instrumentation 63

   6. Piping and Appurtenances 65

   7. Special Tools 65

6. Inspection, Testing, and Preparation for Shipment 66

   1. General 66

   2. Inspection 66

   3. Testing 68

   4. Preparation for Shipment 72

7. Supplier’s Data 74

   1. General 74

   2. Proposals 75

   3. Contract Data 78

Annex A (normative) Procedure for the Determination of Residual Unbalance. 81

Annex B (informative) Typical Shaft End Seals 89

Annex C (normative) Requirements for Lateral Analysis Reports 98

Annex D (normative) Requirements for Torsional Analysis Reports 106

Annex E (normative) Magnetic Bearings 110

Annex F (normative) Dry Gas Seal Testing at Manufacturer’s Shop 126

Annex G (informative) Guidelines for Anti-surge Systems 128

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Page

Annex H (informative) Typical Bid Tab Template 130

Annex I (informative) Full-load/Full-pressure/Full-speed Testing 143

Bibliography 147

Part 2—Nonintegrally Geared Centrifugal and Axial Compressors

1. Scope 149

2. Normative References 149

3. Terms, Definitions, and Abbreviations 149

4. General 149

   1. Dimensions and Units 149

   2. Statutory Requirements 149

   3. Unit Responsibility 149

   4. Basic Design 150

   5. Materials 150

   6. Casings 150

   7. Rotating Elements 154

   8. Dynamics 156

   9. Bearings and Bearing Housings 156

   10. Shaft End Seals 158

   11. Integral Gearing 159

   12. Nameplates and Rotation Arrows 159

5. Accessories 160

   1. Drivers and Gearing 160

   2. Couplings and Guards 160

   3. Lubrication and Sealing Systems 160

   4. Mounting Plates 160

   5. Controls and Instrumentation 160

   6. Piping and Appurtenances 161

   7. Special Tools 162

6. Inspection, Testing, and Preparation for Shipment 162

   1. General 162

   2. Inspection 162

   3. Testing 162

   4. Preparation for Shipment 167

7. Supplier’s Data 167

   1. General 167

   2. Proposals 167

   3. Contract Data 167

Annex A (normative) Datasheets 168

Annex B (informative) Vendor (Supplier) Data and Drawing Requirements 187

Annex C (informative) Centrifugal Compressor Nomenclature 199

Annex D (informative) Typical Materials for Components 201

Annex E (informative) Inspector’s Checklist 215

Annex F (normative) Nozzle Forces and Moments 222

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Part 3—Integrally Geared Centrifugal Compressors

Page

1. Scope 227

2. Normative References 227

3. Terms, Definitions, and Abbreviations 227

4. General 227

   1. Dimensions and Units 227

   2. Statutory Requirements 227

   3. Unit Responsibility 227

   4. Basic Design 227

   5. Materials 228

   6. Casings 228

   7. Rotating Elements 230

   8. Dynamics 230

   9. Bearings and Bearing Housings 231

   10. Shaft and Seals 232

   11. Integral Gearing 233

   12. Nameplates and Rotation Arrows 236

5. Accessories 236

   1. Drivers 236

   2. Couplings and Guards 236

   3. Lubrication and Sealing Systems 237

   4. Mounting Plates 237

   5. Controls and Instrumentation 237

   6. Piping and Appurtenances 238

   7. Special Tools 239

6. Inspection, Testing, and Preparation for Shipment 239

   1. General 239

   2. Inspection 239

   3. Testing 239

7. Supplier's Data 243

   1. General 243

   2. Proposals 243

   3. Contract Data 243

Annex A (informative) Typical Datasheets 244

Annex B (informative) Vendor (Supplier) Drawing and Data Requirements 269

Annex C (informative) Nomenclature 282

Annex D (informative) Typical Materials for Integrally Geared Compressors 285

Annex E (informative) Inspector's Checklist 299

Annex F (informative) External Forces and Moments 305

Annex G (normative) Rating Formulae for Integral Gearing 306

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Part 4—Expander-compressors

Page

1. Scope 309

2. Normative References 309

3. Terms, Definitions, and Abbreviations 309

4. General 309

   1. Dimensions and Units 309

   2. Statutory Requirements 309

   3. Unit Responsibility 309

   4. Basic Design 309

   5. Materials 310

   6. Casings 310

   7. Rotating Elements 312

   8. Dynamics 313

   9. Bearings and Bearing Housings 315

   10. Expander-compressor Shaft Seals 316

   11. Integral Gearing 316

   12. Nameplates and Rotation Arrows 316

5. Accessories 317

   1. Drivers 317

   2. Couplings and Guards 317

   3. Lubrication and Sealing Systems 317

   4. Mounting Plates 317

   5. Controls and Instrumentation 317

   6. Piping and Appurtenances 320

   7. Special Tools 320

6. Inspection, Testing, and Preparation for Shipment 320

   1. General 320

   2. Inspection 320

   3. Testing 321

   4. Preparation for Shipment 324

7. Supplier’s Data 324

   1. General 324

   2. Proposals 324

   3. Contract Data 325

Annex A (informative) Datasheets 326

Annex B (informative) Vendor (Supplier) Drawing and Data Requirements 337

Annex C (informative) Nomenclature 351

Annex D (informative) Typical Materials for Major Components 352

Annex E (informative) Inspector’s Checklist 363

Annex F (normative) Nozzle Forces and Moments 369

Annex G (informative) Lubrication and Sealing Requirements 373

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Introduction

Users of this standard should be aware that further or differing requirements may be needed for individual applications. This standard is not intended to inhibit a supplier from offering, or the purchaser from accepting alternative equipment or engineering solutions for the individual application. This may be particularly appropriate where there is innovative or developing technology. Where an alternative is offered, the supplier should identify any variations from this standard and provide details.

A bullet (●) at the beginning of a section or subsection indicates that either a decision is required or further information is to be provided by the purchaser. This information should be indicated on datasheets or stated in the enquiry or purchase order (see examples in Annex A of Parts 2, 3, and 4).

In this standard, where practical, U.S. customary (USC) units are included in parentheses for information.

ix

Axial and Centrifugal Compressors and Expander-compressors Part 1—General Requirements

1. Scope

   
   

   This standard specifies minimum requirements and gives recommendations for axial compressors, single- shaft and integrally geared process centrifugal compressors, and expander-compressors for special purpose applications that handle gas or process air in the petroleum, chemical, and gas industries. This part of API 617 specifies general requirements applicable to all such machines.

   
   

   API 617 does not apply to fans (these are covered by API 673) or blowers that develop less than 34 kPa (5 psi) pressure rise above atmospheric pressure. API 617 also does not apply to packaged, integrally- geared centrifugal plant and instrument air compressors, which are covered by API 672. Hot gas expanders over 300 °C (570 °F) are not covered by API 617.

   
   

   This part of API 617 contains information pertinent to all equipment covered by the other parts of this document. It shall be used in conjunction with the following parts, as applicable to the specific equipment covered:

   
   

   • Part 2—Nonintegrally Geared Centrifugal and Axial Compressors,

     
     

   • Part 3—Integrally Geared Centrifugal Compressors,

     
     

   • Part 4—Expander-compressors.

   
   

2. Normative References

2.1 The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

API Standard 612, Petroleum, Petrochemical and Natural Gas—Steam Turbines—Special Purpose Applications, Sixth Edition

API Standard 613, Special Purpose Gear Units for Petroleum, Chemical, and Gas Industry Services, Fifth Edition

API Standard 614, Lubrication, Shaft-sealing and Oil-control Systems and Auxiliaries, Fifth Edition API Standard 670, Machinery Protection Systems, Fourth Edition

API Standard 671, Special Purpose Couplings for Petroleum, Chemical and Gas Industry Services,

Fourth Edition

AGMA 2015-1-A01 2001 1, Accuracy Classification System—Tangential Measurements for Cylindrical Gears

1 American Gear Manufacturers Association, 500 Montgomery Street, Suite 350, Alexandria, Virginia 22314, www.agma.org.

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