NEN EN 12732 : 2013 + A1 2014
Current
The latest, up-to-date edition.
GAS INFRASTRUCTURE - WELDING STEEL PIPEWORK - FUNCTIONAL REQUIREMENTS
12-01-2013
Foreword
1 Scope
2 Normative references
3 Definitions and abbreviations
4 Quality system
4.1 Welding contractors
4.2 Welders
4.3 Welding supervisory/co-ordination personnel
4.4 Testing personnel
5 Welding consumables
6 Production welding
6.1 General requirements
6.2 Joint preparation
6.3 Preheating
6.4 Tacking
6.5 Welding
6.6 Actions after welding
6.7 Repair of weld defects
7 Special procedures
7.1 Attachments of structural parts
7.2 Attachments of cathodic protection connections
7.3 Hot tapping and other welding work on
pressurized pipelines and systems
8 Inspection of the weld joint
8.1 General
8.2 Scope of inspection
8.3 Non-destructive examination
8.4 Time of inspection
8.5 Acceptance criteria
8.6 Recording of test results
9 Documentation
9.1 General
9.2 Archiving requirements
10 Specific requirements for gas supply systems up to and
including 16 bar MOP (distribution)
10.1 General
10.2 Welders
10.3 Welding supervisory personnel
10.4 Production welding
10.5 Acceptance requirements
10.6 Requirements for records and documentation
11 Specific requirements for gas supply systems greater
than 16 bar MOP (transmission)
11.1 General
11.2 Welders
11.3 Welding supervisory personnel
11.4 Qualification of welding procedures
11.5 Production welding
11.6 Destructive testing of production welds
11.7 Acceptance requirements
11.8 Requirements for records and documentation
12 Specific requirements for metering, regulating and
compressor stations
12.1 General
12.2 Specific requirements
Annex A (informative) Qualification for pipeline welders
Annex B (informative) Testing of the base material
Annex C (informative) Wall thickness compensation/design
examples
Annex D (informative) Critical aspects for hot-tap welding
or welding on gas-pressurized pipelines
Annex E (informative) Visual inspection of joints
Annex F (informative) Manual ultrasonic testing of weld
joints for wall thicknesses between
approximately 6 mm and 10 mm
Annex G (informative) Acceptance criteria recommendations
for on-site production welds
Annex H (informative) Recommendations for brazing and
aluminothermic welding of anodic
bonding leads
Annex I (informative) Bibliography
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