BS 4515:1996

Foreword
SECTION 1. GENERAL
1.1 Scope
1.2 References
1.3 Definitions
1.4 Information to be supplied and items to be approved
1.5 Equipment
1.6 Welding processes
1.7 Welding consumables
SECTION 2. TESTING, QUALIFICATION AND APPROVAL OF WELDING
           PROCEDURES
2.1 General
2.2 Records
2.3 Welding procedure
2.4 Changes affecting approval (essential variables)
2.5 Testing of butt joints for procedure qualification
2.6 Testing of fillet welds for procedure qualification
2.7 Testing of repair welds for procedure qualification
SECTION 3. TESTING, QUALIFICATION AND APPROVAL OF WELDERS
3.1 General
3.2 Butt joints
3.3 Branch connections
3.4 Fillet welds for sleeves, sockets, slip-on flanges
      or other attachments
3.5 Changes affecting qualification and approval
      (essential variables)
3.6 Non-destructive testing
3.7 Destructive testing
3.8 Retests
3.9 Records
3.10 Mechanized welding
SECTION 4. PRODUCTION WELDING
4.1 Proximity of welds
4.2 Pipe end preparation
4.3 Fusion faces
4.4 Alignment
4.5 Line-up clamps and pipe supports
4.6 Tack welds
4.7 Working clearance
4.8 Stray arcs
4.9 Weather conditions
4.10 Preheating and post-weld heat treatment
4.11 Branches
4.12 Inter-run cleaning
4.13 Partially completed joints
SECTION 5. INSPECTION AND TESTING OF WELDS
5.1 General
5.2 Personnel qualification
5.3 Visual inspection
5.4 Radiographic testing
5.5 Manual ultrasonic testing
5.6 Automatic ultrasonic testing
5.7 Magnetic particle testing
SECTION 6. ACCEPTANCE AND RECTIFICATION OF WELDS
6.1 Non-destructive testing acceptance criteria
6.2 Rectification of welds
Annexes
A. (informative) Recommendations for hyperbaric arc
      welding
B. (informative) Recommendations for brazing and
      aluminothermic welding of anodic bonding leads
C. (informative) Proposed welding procedure
      specification
D. (informative) Example of a record form for an MMA
      welder qualification test
E. (informative) Guidance for establishing preheating
      requirements
F. (informative) Example of a radiographic
      specification
Tables
1. Welding procedure specification details and changes
      affecting approval
2. Qualified ranges of chemical analysis
3. Number of specimens for tensile tests, macro-
      examination and hardness survey and number of sets
      of specimens for Charpy tests, for procedure approval
      on butt joints
4. Hardness values
5. Test specimens for procedure approval tests on
      fillet welds
6. Number of specimens for weld repair procedure
      qualification
7. Diameter and thickness ranges for butt joints and
      branch connections
8. Acceptance criteria for welds
Figures
1. Location of repair excavations and destructive test
      specimens
2. Location of test specimens
3. Tensile test specimen
4. Recommended locations for hardness impressions
5. Charpy V-notch impact test specimen positions
6. Positioning of Charpy V-notch impact specimens for
      procedure approval of partial penetration repair
      welds
7. Preparation of fillet weld specimens
8. Recommended locations for hardness impressions for
      repair test welds
B.1 Recommended locations for hardness traverses and
      impressions for brazing and aluminothermic welding
C.1 Example of proposed welding procedure specification
C.2 Example of welding procedure specification for
      production welding
C.3 As-run record of welding procedure qualification
      test
D.1 Example of record form for an MMA welder
      qualification test
E.1 Nomogram for preheating requirements
F.1 Example of a radiographic procedure specification
List of references

Specifies requirements for the welding of carbon, carbon manganese and low alloy steel pipelines. Applies to pipes of outside diameter 21.0 mm and larger having a thickness of 3.0 mm or greater.