Pipe with Welded Connectors

API RECOMMENDED PRACTICE 5C6 THIRD EDITION, MAY 2018

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Copyright © 2018 American Petroleum Institute

Foreword

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iii

Contents

Page

1. Scope 1

   1. Purpose 1

   2. Coverage 1

2. Normative References 1

3. Terms and Definitions 2

4. Materials Information Requirements 5

   1. Documentation 5

   2. Pipe 5

   3. Connectors 7

   4. Additional Suggestions and Supplemental Requirements 7

5. Welding Procedure Qualification 7

   1. Written Procedure 7

   2. Base Metal Groupings 7

   3. Welding Consumables 8

   4. Hardness Testing 8

   5. Charpy Impact Testing 8

   6. Postweld Heat Treatment (PWHT) 8

6. Welder and Welding Operator Qualification 9

   1. Testing Requirements 9

   2. Records 9

7. Production Welding Controls 9

   1. Qualifications 9

   2. Use of WPS 9

   3. Preheating 9

   4. Fit-up 9

   5. Postweld Heat Treatment 9

   6. Welding Controls 9

8. Inspection 10

   1. Calibration of Measuring and Test Equipment 10

   2. Connector Squareness and Alignment Verification 10

   3. Nondestructive Examination of Weldments 10

Annex A (normative) Simulated Postweld Heat Treatment (SPWHT) Procedure 12

Annex B (informative) Suggestions for Ordering Equipment 14

Annex C (informative) Supplementary Requirements 16

Bibliography 19

Figures

B.1 Connector Dimensional Considerations 15

1. Rockwell Method 16

2. Vickers Method 17

Tables

B.1 Purchaser Supplied Information 15

v

Pipe with Welded Connectors

1. Scope

   1. Purpose

      This standard provides a practice for facility or field welding of connectors to pipe. The technical content contains guidance and requirements for welding procedure qualification, welder performance qualification, materials, testing, production welding, and inspection.

      
      

   2. Coverage

      
      

      This standard covers the weld fabrication of connectors and handling attachments, such as lift eyes and landing pads, to pipe. This standard also includes practices used within industry and is intended to be analogous to API 6A PSL 1 with additional requirements specific to the equipment fabrication.

      
      

2. Normative References

The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced standard applies (including any addenda/errata).

API Specification 2B, Structural Steel Pipe

API Specification 5L, Line Pipe

API Specification 5L, Line Pipe (46th Edition)

API Specification 6A, Wellhead and Christmas Tree Equipment

API Standard 1104, Welding of Pipelines and Related Facilities

API Standard 20H, Heat Treatment Services—Batch Type for Equipment Used in the Petroleum and Natural Gas Industry

Aerospace Material Specification 2750, Pyrometry

ASME Boiler and Pressure Vessel Code, Section V, Nondestructive Examination

ASME Boiler and Pressure Vessel Code, Section VIII, Division I, Rules for Construction of Pressure Vessels

ASME Boiler and Pressure Vessel Code, Section IX, Welding and Brazing Qualifications ASTM A370, Standard Methods and Definitions for Mechanical Testing of Steel Products ASTM E10, Standard Test Method for Brinell Hardness of Metallic Materials

ASTM E18, Standard Test Methods for Rockwell Hardness of Metallic Materials

ASTM E23, Standard Test Methods for Notched Bar Impact Testing of Metallic Materials

ASTM E92, Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials