Specification for Marine Drilling Riser Equipment

API SPECIFICATION 16F

SECOND EDITION, NOVEMBER 2017

API MONOGRAM PROGRAM EFFECTIVE DATE: MAY 1, 2018 ERRATA 1, FEBRUARY 2019

ADDENDUM 1, JANUARY 2021

(API MONOGRAM PROGRAM EFFECTIVE DATE: JULY 1, 2021)

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iii

Contents

Page

1. Scope 1

2. Normative References 1

3. Terms, Definitions, and Abbreviations 4

   1. Terms and Definitions 4

   2. Abbreviations and Symbols 12

4. Design 14

   1. General 14

   2. Service Classifications 14

   3. Size and Coupling Model 14

   4. Rated Load 14

   5. Pressure Ratings 16

   6. Temperature Criteria 16

   7. Design of Structures and Lifting Attachments 16

   8. Design Documentation 16

5. Materials and Welding Requirements 17

   1. General 17

   2. Materials Selection 17

   3. Written Specifications 17

   4. Metallic Materials 18

   5. Material Applications 21

   6. Qualification Test Coupons (QTCs). 22

   7. Welding 23

   8. Metallic Coatings 25

6. Quality Control Requirements 26

   1. General 26

   2. Measuring and Testing Equipment 27

   3. Quality Control Personnel Qualifications 27

   4. Quality Control Requirements for Equipment and Parts 28

   5. NDE of Fabrication and Repair of Weldments 30

   6. Equipment Traceability 32

   7. Requirements for Quality Control Records 32

   8. Manufacturing Data Book 33

7. Riser Tensioner Equipment 33

   1. General 33

   2. Pressure 34

   3. Service Ratings 34

   4. Tension and Pressure vs Stroke 36

   5. Design Standards 37

   6. Operational Controls 38

   7. Temperature Considerations 38

   8. Fluids 38

   9. Rod Materials and Coatings 39

   10. Failure Control Provisions 39

   11. Marking 39

   12. Materials 39

   13. Quality Control 39

       v

       Contents

       Page

8. Flex/Ball Joints 39

   1. Service Classification 39

   2. Design 40

   3. Materials 41

   4. Dimensions 41

   5. Testing 41

   6. Marking 41

9. Choke, Kill, and Auxiliary Lines 42

   1. Design-Choke, Kill, and Auxiliary Lines 42

   2. Testing of Choke, Kill, and Auxiliary Lines. 42

   3. Materials—Choke, Kill, and Auxiliary Lines 44

   4. Welding and Quality Process Control-Choke, Kill, and Auxiliary Lines 44

10. Drape Hoses and Jumper Lines 44

    1. Service Classification 44

    2. Design 44

    3. Process Control 45

    4. Quality Control 45

11. Telescopic Joint (Slip Joint) 45

    1. Service Classification 45

    2. Design 46

    3. Testing 46

    4. Materials 47

    5. Quality Control 47

    6. Dimensions 48

    7. Process Control 48

    8. Marking 48

12. Riser Joints 48

    1. Service Classification 48

    2. Design 48

    3. SAF/SLR 49

    4. Pressure Ratings 49

    5. Drift Testing 50

    6. Materials and Welding 50

    7. Dimensions 50

    8. Process Control 50

    9. Quality Control 50

    10. Marking 50

13. Buoyancy Equipment 51

    1. General 51

    2. Syntactic Foam Modules 51

14. Riser Running and Handling Equipment 57

    1. General 57

    2. Coverage 57

    3. Design 57

    4. Testing 60

    5. Materials 61

       vi

       Contents

       Page

    6. Quality Control 62

    7. Dimensions 62

    8. Marking 62

15. Tensioner Rings 62

    1. General 62

    2. Service Classification 63

    3. Design 64

    4. Testing 64

    5. Materials 65

    6. Quality Control 65

    7. Dimensions 65

    8. Marking 66

16. Riser Coupling 66

    1. General 66

    2. Service Classification 66

    3. Design Loads 67

    4. Design Analysis 68

    5. Testing 69

    6. Material 71

    7. Welding 72

    8. Quality Control 72

    9. Marking 72

17. Special Riser System Components 72

    1. General 72

    2. Service Classification 72

    3. Design 72

    4. Testing 73

    5. Quality Control 73

18. Lower Riser Adapter 73

    1. General 73

    2. Marking 73

    3. Quality Control 73

19. Operation and Maintenance Manuals 73

    1. General 73

    2. Equipment Description 73

    3. Functional Description 74

    4. Instructions for Equipment Usage. 74

    5. Maintenance Instructions 74

    6. Warnings and Cautions 74

Annex A 75

Annex B (informative) Components of a Marine Drilling Riser System 76

Annex C (normative) Design for Static Loading 81

Annex D (informative) Finite Element Stress Analysis 86

Annex E (informative) Thermal Sprayed Aluminum 87

vii

Contents

Page

Annex F (normative) Manufacturing Data Book Requirements 92

Annex G (informative) Example Calculations for Tensioners 94

Annex H (informative) Effective Polytropic Constants for Isentropic Compression

and Expansion of Air and Nitrogen 98

Annex I (informative) Fatigue Considerations 104

Annex J (informative) Coupling Optional Qualification Tests 107

Bibliography 108

Figures

1 Rated Tension and MTL to MSP, MCP, and MAWP (for Illustration Only) 35

B.1 Marine Drilling Riser System and Associated Equipment 76

C.1 Stress Distribution Across Section A-A 84

1. Tension and Pressure vs Stroke 96

2. Typical Wire Rope Tensioning System 97

Tables

1. Design Temperatures for Various Line Types 16

2. Bolting Requirements 22

3. Inclusion Criteria 30

4. Elongation Properties 62

1. Surface Preparation 89

2. Sealer Application 90

3. TSA Application 91

G.1 Tensioner Example Calculation 94

1. Polytropic Constant Table—Air Compressed to 85 % of Initial Volume 98

2. Polytropic Constant Table—Air Compressed to 90 % of Initial Volume 98

3. Polytropic Constant Table—Air Compressed to 95 % of Initial Volume 99

4. Polytropic Constant Table—Air Expanded to 105 % of Initial Volume 99

5. Polytropic Constant Table—Air Expanded to 110 % of Initial Volume 100

6. Polytropic Constant Table—Air Expanded to 115 % of Initial Volume 100

7. Polytropic Constant Table—Nitrogen Compressed to 85 % of Initial Volume 101

8. Polytropic Constant Table—Nitrogen Compressed to 90 % of Initial Volume 101

9. Polytropic Constant Table—Nitrogen Compressed to 95 % of Initial Volume 102

10. Polytropic Constant Table—Nitrogen Expanded to 105 % of Initial Volume 102

11. Polytropic Constant Table—Nitrogen Expanded to 110 % of Initial Volume 103

12. Polytropic Constant Table—Nitrogen Expanded to 115 % of Initial Volume 103

Specification for Marine Drilling Riser Equipment

1. Scope

   
   

   This specification establishes standards of performance and quality for the design, manufacture, and fabrication of marine drilling riser equipment used in conjunction with a subsea blowout preventer (BOP) stack.

   
   

   This specification provides the requirements for the following major subsystems in the marine drilling riser system:

   
   

   • riser tensioner equipment;

     
     

   • flex/ball joints;

     
     

   • choke, kill, and auxiliary lines;

     
     

   • drape hoses and jumper lines for flex/ball joints;

     
     

   • telescopic joint (slip joint) and tensioner ring;

     
     

   • riser joints;

     
     

   • buoyancy equipment;

     
     

   • riser running equipment;

     
     

   • special riser system components;

     
     

   • lower riser adapter;

     
     

   • riser coupling.

   
   

2. Normative References

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 applies (including any addenda/errata).

API Technical Report 5C3, Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe Used As Casing or Tubing; and Performance Properties Tables for Casing and Tubing

API Specification 5CT, Specification for Casing and Tubing

API Specification 5L, Specification for Line Pipe

API Specification 6A, Specification for Wellhead and Christmas Tree Equipment

API Standard 6ACRA, Age-hardened Nickel-based Alloys for Oil and Gas Drilling and Production Equipment

API Specification 7K, Drilling and Well Servicing Equipment

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