Qualification of Nondestructive Examination Services for Equipment Used in the Petroleum and Natural Gas Industry

API STANDARD 20D

SECOND EDITION, AUGUST 2019

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Copyright © 2019 American Petroleum Institute

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Foreword

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Contents

Page

1. Scope 1

   1. Purpose 1

   2. Applicability 1

2. Normative References 1

3. Terms, Definitions, Acronyms, Abbreviations, Symbols, and Units 2

   1. Terms and Definitions 2

   2. Abbreviations 3

   3. Symbols and Units 3

4. Quality Management System (QMS) 4

5. Facility Requirements 4

6. Responsibilities and Duties 4

7. Personnel Requirements 4

8. Written Procedure Requirements 5

9. NDE Equipment and Calibration 5

   1. Inventory 5

   2. Calibration 5

10. Quality Control Records Requirements 5

    1. General 5

    2. Records Retention 6

11. NDE Process Requirements 6

    1. General 6

    2. Magnetic Particle Examination (MT) 6

    3. Liquid Penetrant Examination (PT) 9

    4. Ultrasonic Examination (UT) 13

    5. Radiographic Examination (RT) 17

Bibliography 21

Tables

1. Required Verification Intervals for Magnetic Particle Examination 7

2. Required Calibration Intervals for Magnetic Particle Examination 7

3. Requirements of a Magnetic Particle Examination Procedure 8

4. Required Calibration and Verification for Liquid Penetrant Examination 10

5. Requirements of a Liquid Penetrant Examination Procedure 11

6. Required Performance Tests and Frequency for Liquid Penetrant Systems 12

7. Requirements of an Ultrasonic Examination Procedure 13

8. Calibration and Verification Requirements for Ultrasonic Examination Equipment 14

9. Calibration and Verification Requirements for Radiographic Examination Equipment 17

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   Contents

   Page

10. Process Control Checks for Radiographic Examinations 19

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Qualification of Nondestructive Examination Services for Equipment Used in the Petroleum and Natural Gas Industry

1. Scope

   
   

   1. Purpose

      
      

      This standard specifies requirements for the application of nondestructive examination (NDE) methods as well as the development and qualification procedures used in the manufacturing, servicing, and/or service of equipment for the petroleum and natural gas industries.

      
      

   2. Applicability

      
      

      This is applicable to suppliers providing NDE services for equipment used in the oil and natural gas industries. The requirements of this standard apply to magnetic particle, liquid penetrant, radiography, and ultrasonic methods of NDE.

      
      

      NOTE This standard does not limit the responsibility of any manufacturer of commercial products using NDE services and manufactured to an API standard from its responsibility for compliance with all applicable requirements of that API standard.

      
      

2. Normative References

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any addenda) applies.

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

API Specification Q2, Specification for Quality Management System Requirements for Service Supply Organizations for the Petroleum and Natural Gas Industries

ASME Boiler and Pressure Vessel Code (BPVC) 1, Section V: Nondestructive Examination

ASNT SNT-TC-1A, Recommended Practice for Personnel Qualification and Certification in Nondestructive Testing

ASNT ACCP-CP-1, ASNT Central Certification Program

ASTM E428 2,Standard Practice for Fabrication and Control of Metal, Other Than Aluminum, Reference Blocks Used in Ultrasonic Testing

ASTM E1114, Standard Test Method for Determining the Size of Iridium-192 Industrial Radiographic Sources

ASTM E1165, Standard Test Method for Measurement of Focal Spots of Industrial X-Ray Tubes by Pinhole Imaging

ASTM E1316, Standard Terminology for Nondestructive Examinations

ASTM E1417, Standard Practice for Liquid Penetrant Testing

1 ASME International, Two Park Avenue, New York, New York 10016-5990, www.asme.org.

2 ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, Pennsylvania 19428-2959, www.astm.org.

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