Specification for Marine Drilling Riser Equipment

API SPECIFICATION 16F FIRST EDITION, AUGUST 2004

EFFECTIVE DATE: FEBRUARY 1, 2005

REAFFIRMED, AUGUST 2010

ADDENDUM 1, SEPTEMBER 2014

ADDENDUM 2, NOVEMBER 2014

Specification for Marine Drilling Riser Equipment

Upstream Segment

API SPECIFICATION 16F FIRST EDITION, AUGUST 2004

EFFECTIVE DATE: FEBRUARY 1, 2005

REAFFIRMED, AUGUST 2010

ADDENDUM 1, SEPTEMBER 2014

ADDENDUM 2, NOVEMBER 2014

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   Copyright © 2004 American Petroleum Institute

   
   

   FOREWORD

   
   

   This publication is under jurisdiction of the API Subcommittee on Drilling Well Control Systems. This specification was formulated to serve as an aid to procurement of standard- ized equipment and materials as well as provide instructions to designers and manufacturers of marine drilling riser equipment. It identifies requirements for design, materials, process- ing and testing of standardized equipment.

   API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict.

   This standard shall become effective on the date printed on the cover but may be used vol- untarily from the date of distribution.

   
   

   iii

   
   

   CONTENTS

   
   

   Page

   1. SCOPE 1

      1. Purpose 1

      2. Coverage 1

   2. NORMATIVE REFERENCES 1

   3. DEFINITIONS AND ABBREVIATIONS 3

   4. COMPONENTS OF A MARINE DRILLING RISER SYSTEM 6

      1. General 6

      2. Functions of Marine Drilling Riser System 6

      3. System Dimensions 6

      4. Tensioner Equipment 7

      5. Riser Spider 7

      6. Surface Diverter 8

      7. Flex/Ball Joint 8

      8. Telescopic Joint and Tensioner Ring 8

      9. Riser Joints 8

      10. Choke, Kill and Auxiliary Lines 8

      11. Lower Riser Adapter 8

      12. Lower Marine Riser Package (LMRP) 8

      13. Buoyancy Equipment. 9

      14. Riser Pup Joints 9

      15. Riser Handling Tools 9

      16. Special Marine Drilling Riser Components 9

   5. DESIGN 9

      1. General 9

      2. Service Classifications 9

      3. Riser Loading 11

      4. Determination of Stresses by Analysis 11

      5. Stress Distribution Verification Test 11

      6. Riser Design Load 12

      7. Design for Static Loading 12

      8. Design of Lifting Attachments 12

      9. Design Documentation 13

   6. MATERIALS AND WELDING REQUIREMENTS 13

      1. General 13

      2. Materials Selection. 13

      3. Written Specifications 13

      4. Metallic Materials 14

      5. Chemical Composition 14

      6. Mechanical Properties 14

      7. Qualification Test Coupons (QTC) 15

      8. Mechanical Testing 15

      9. Materials for Low-temperature Service 16

      10. Materials to Resist Sulfide Stress Cracking 16

      11. Manufacturing Practice 16

          v

      12. Heat Treating 17

      13. Welding 17

   7. RISER TENSIONER EQUIPMENT 18

      1. General 18

      2. Service Ratings 19

      3. Tension Versus Stroke 19

      4. Pressure 19

      5. Design Standards 19

      6. Tensioner Foundations 20

      7. Operational Controls and Monitoring Equipment 20

      8. Temperature Considerations 20

      9. Fluids 20

      10. Failure Control Provisions 21

      11. Marking 21

   8. FLEX/BALL JOINTS 21

      1. Service Classification 21

      2. Load/Deflection Curve 21

      3. Design 21

      4. Material Selection 22

      5. Dimensions 22

      6. Testing 22

      7. Marking 22

   9. CHOKE, KILL AND AUXILIARY LINES 23

      1. Design 23

      2. Materials 23

      3. Welding and Quality Process Control 23

   10. DRAPE HOSES AND JUMPER LINES FOR FLEX/BALL JOINTS 23

       1. Service Classification 23

       2. Design 23

       3. Process Control 24

   11. TELESCOPIC JOINT (SLIP JOINT) 24

       1. Service Classification 24

       2. Design 24

       3. Materials 25

       4. Dimensions 25

       5. Process Control 25

       6. Testing 25

       7. Marking 26

   12. RISER JOINTS 26

       1. Service Classification 26

       2. Design 26

       3. Materials and Welding 27

       4. Dimensions 27

       5. Drift 27

       6. Process Control 27

       7. Marking 27

   13. BUOYANCY EQUIPMENT 27

       1. General 27

       2. Syntactic Foam Modules 27

       3. Air Can Systems (Informative) 31

   14. RISER RUNNING AND HANDLING EQUIPMENT 32

       1. Introduction 32

       2. Design 32

       3. Testing 34

       4. Material 35

       5. Repair Welding 37

       6. Quality Control 37

       7. Dimensions 39

       8. Process Control 39

       9. Marking 40

   15. SPECIAL RISER SYSTEM COMPONENTS 40

       1. General 40

       2. Service Classification 40

       3. Design 40

       4. Testing 40

   16. LOWER RISER ADAPTER 40

       1. General 40

       2. Marking 40

   17. OPERATION AND MAINTENANCE MANUALS 40

       1. General 40

       2. Equipment Description 41

       3. Functional Description 41

       4. Instructions for Equipment Usage 41

       5. Maintenance Instructions 41

       6. Repair Instructions 41

       7. Warnings and Cautions 41

   18. QUALITY CONTROL REQUIREMENTS 41

       1. General 41

       2. Sour Service 41

       3. Equipment Traceability 42

       4. Quality Control Documents 42

ANNEX A STRESS ANALYSIS 43

ANNEX B DESIGN FOR STATIC LOADING 45

ANNEX C API MONOGRAM 49

ANNEX D BIBLIOGRAPHY 51

Figures

1 Marine Drilling Riser System and Associated Equipment 7

B-1 Stress Distribution Across Section A-A 48

Tables

1. Elongation Requirements 36

2. Adjustment Factors for Sub-size Impact Specimens 36

C-1 Marking Requirements 50

Specification for Marine Drilling Riser Equipment

1. Scope

   1. PURPOSE

      These specifications establish 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.

      
      

   2. COVERAGE

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

      1. Riser tensioner equipment.*

      2. Flex/ball joints.*

      3. Choke, kill and auxiliary lines.

      4. Drape hoses and jumper lines for flex/ball joints.

      5. Telescopic joint (slip joint) and tensioner ring.*

      6. Riser joints.*

      7. Buoyancy equipment* (only syntactic foam modules eligible for API Monogram).

      8. Riser running equipment.*

      9. Special riser system components.

      10. Lower riser adapter.*

      Note: Only those subsystems above that are marked with an asterisk may be considered for API monogramming.

      Section 4 of the specification gives a general description of each of these components listed above. Section 5 provides general design requirements for riser components. Section 6 addresses materials, including the riser pipe. Paragraph 6.13 covers welding of couplings to riser pipe and welding of pipe to pipe. It also covers other types of welds used in the fabrication of riser equipment.

      Sections 7 through 16 address the following for each component:

      1. Service classification.

      2. Design.

      3. Materials.

      4. Dimensions.

      5. Process control.

      6. Testing.

      7. Marking.

      8. Packing/Shipping.

      
      

2. Normative References

This specification includes by reference, either in total or in part, other API and industry standards listed below. The latest edition of these standards shall be used unless otherwise noted.

API

RP 2RD Design of Risers for Floating Production Systems (FPSs) and Tension-Leg Platforms (TLPs)

Bull 5C3 Formulas and Calculations for Casing, Tubing, Drill Pipe, and Line Pipe Properties

Spec 5L Line Pipe

Spec 6A Wellhead and Christmas Tree Equipment

TR 6AM Material Toughness

Spec 8C Specification for Drilling and Production Hoisting Equipment

Spec 9A Wire Rope

RP 9B Application, Care and Use of Wire Rope for Oil Field Service

Spec 16A Drill-through Equipment

Spec 16C Choke and Kill Systems

Spec 16D Control Systems for Drilling Well Control Equipment

RP 16Q Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems

1