Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries

API SPECIFICATION 20E FIRST EDITION, AUGUST 2012

ERRATA, OCTOBER 2014

Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries

Upstream Segment

API SPECIFICATION 20E FIRST EDITION, AUGUST 2012

ERRATA, OCTOBER 2014

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Copyright © 2012 American Petroleum Institute

Foreword

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Contents

page

1. Scope. 1

   1. Purpose 1

   2. Applicability 1

   3. Bolting Specification Levels (BSL) 1

   4. Bolting Types 1

2. Normative References 1

3. Terms, Definitions 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 6

5. Production of Qualified Bolting 7

   1. Qualification of Procurement Sources for Raw Material 7

   2. Material Specifications 8

   3. Manufacturing Procedure Specification 8

   4. Raw Material 9

   5. Chemical Analysis 10

   6. Mechanical Properties 10

   7. Metallurgical Requirements 10

   8. Examination and Test Requirements 12

   9. Nondestructive Examination Requirements 13

   10. Dimensional and Visual Inspection 14

6. Calibration Systems 14

7. Test Report 14

8. Marking Requirements 15

   1. ASTM Product Marking 15

   2. Marking Required by this Standard 15

9. Record Retention 15

10. Storage and Shipping 15

Annex A (normative) Supplementary Requirements 16

Annex B (informative) API Monogram Program 17

V

Alloy and Carbon Steel 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 alloy and carbon steel 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. An annex for supplemental requirements that may be invoked by the pur- chaser is included.

      
      

   3. Bolting Specification Levels (BSL)

      
      

      This standard establishes requirements for three bolting specification levels (BSL). These three BSL des- ignations define different levels of technical, quality and qualification requirements, BSL-1, BSL-2, and BSL-3. The BSLs are numbered in increasing levels of severity in order to reflect increasing technical, quality and qualification criteria.

      
      

   4. Bolting Types

      
      

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

      
      

      1. machined studs;

         
         

      2. machined bolts, screws and nuts;

         
         

      3. cold formed bolts, screws, and nuts (BSL-1 only);

         
         

      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 documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the reference document (including amendments) applies.

API 6A, 20th Edition, Specification for Wellhead and Christmas Tree Equipment

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