Corrosion-resistant Bolting for Use in the Petroleum and Natural Gas Industries

API SPECIFICATION 20F SECOND EDITION, MAY 2018

API MONOGRAM PROGRAM EFFECTIVE DATE: NOVEMBER 1, 2018 ERRATA 1, NOVEMBER 2020

Special Notes

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Copyright © 2018 American Petroleum Institute

Foreword

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iii

Contents

Page

1. Scope 1

   1. Purpose 1

   2. Applicability 1

   3. Bolting Specification Levels (BSL) 1

   4. Bolting Types for Qualification 1

2. Normative References 1

3. Terms, Definitions, Acronyms, and Abbreviations 3

   1. Terms and Definitions 3

   2. Abbreviations 4

4. Qualification Bolting 4

   1. General 4

   2. Qualification Testing 4

   3. Materials and Dimensions 5

   4. Acceptance of Qualification Bolting 5

   5. Records of Qualification 6

   6. Limits of Bolting Qualification-BSL-2 and BSL-3 6

5. Production of Qualified Bolting 7

   1. Qualification of Procurement Sources for Raw Material 7

   2. Qualification of Suppliers for Subcontracted Operations 8

   3. Material Specifications 9

   4. Manufacturing Process Specification 9

   5. Raw Material 11

   6. Chemical Analysis 11

   7. Mechanical Properties 11

   8. Metallurgical Requirements 12

   9. Examination and Test Requirements 12

   10. Nondestructive Examination (NDE) Requirements 12

   11. Dimensional Inspection and Visual Inspection 13

   12. Final Positive Material Identification 13

6. Calibration Systems 13

7. Test Report 14

8. Marking Requirements 14

   1. Product Marking 14

   2. Additional Marking Required by this Standard 15

9. Record Retention 15

10. Storage and Shipping 16

Annex A (informative) API Monogram Program-Use of the API Monogram by Licensees 17

Annex B (normative) Avoidance of Contamination of Nickel Alloys 18

Bibliography 19

v

Contents

Tables

Page

1. Bolting Test Requirements 5

2. Sampling for Dimensional, Surface NDE, and Visual Inspection 13

3. API 6ACRA and UNS R30035 Grade Identification Markings 15

vi

Corrosion-resistant Bolting for Use in the Petroleum and Natural Gas Industries

1. Scope

   
   

   1. Purpose

      
      

      This standard specifies requirements for the qualification, production, and documentation of corrosion-resistant bolting used in the petroleum and natural gas industries.

      
      

   2. Applicability

      
      

      This standard applies when referenced by an applicable API equipment standard or otherwise specified as a requirement for compliance.

      
      

   3. Bolting Specification Levels (BSL)

      
      

      This standard establishes requirements for two bolting specification levels (BSL). These two BSL designations define different levels of technical, quality, and qualification requirements: BSL-2 and BSL-3. The BSLs are numbered in increasing levels of requirements in order to reflect increasing technical, quality, and qualification criteria. BSL-2 and BSL-3 are intended to be comparable to BSL-2 and BSL-3, as found in API 20E. BSL-1 is omitted from this standard.

      
      

   4. Bolting Types for Qualification

      
      

      This standard covers the following product forms, processes, and sizes:

      
      

      1. machined studs;

         
         

      2. machined bolts, screws, and nuts;

         
         

      3. cold-formed bolts, screws, and nuts with cut or cold-formed threads;

         
         

      4. hot-formed bolts and screws <1.5 in. (38.1 mm) nominal diameter;

         
         

      5. hot-formed bolts and screws ≥1.5 in. (38.1 mm) nominal diameter;

         
         

      6. roll threaded studs, bolts, and screws <1.5 in. (38.1 mm) diameter;

         
         

      7. roll threaded studs, bolts, and screws ≥1.5 in. (38.1 mm) diameter;

         
         

      8. hot-formed nuts <1.5 in. (38.1 mm) nominal diameter;

         
         

      9. hot-formed nuts ≥1.5 in. (38.1 mm) nominal diameter.

      
      

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 Specification Q1, Specification for Quality Management System Requirements for Manufacturing Organizations for the Petroleum and Natural Gas Industry