BS EN ISO 21809-5:2010 Petroleum and natural gas industries. External coatings for buried or submerged pipelines used in pipeline transportation systems. External concrete coatings
BS EN ISO 21809-5 specifies the requirements for qualification, application, testing and handling of materials required for the application of reinforced concrete coating externally to either bare pipe or pre-coated pipe for use in pipeline transportation systems for the petroleum and natural gas industries.
The external application of concrete is primarily used for the negative buoyancy of pipes used in buried or submerged pipeline systems and/or for the mechanical protection of the pipe and its pre-coating.
BS EN ISO 21809-5 is applicable to concrete thicknesses of 25 mm or greater.
Contents of BS EN ISO 21809-5:
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols
4.2 Abbreviated terms
5 General requirements
5.1 Rounding
5.2 Compliance with this part of ISO 21809
6 Information supplied by the purchaser
6.1 General information
6.2 Additional information
7 Materials
7.1 Pipe
7.2 Cement
7.3 Supplementary cementitious materials
7.4 Aggregate — Fine and coarse
7.5 Heavyweight aggregate
7.6 Lightweight aggregate
7.7 Recycled concrete as aggregate
7.8 Water
7.9 Steel reinforcement
7.10 Concrete admixtures
7.11 Reclaimed concrete
8 Concrete mix
9 Coating application
9.1 Qualification
9.2 Application of concrete coating
9.3 Environmental conditions
9.4 Pipe
9.5 Steel reinforcement
9.6 Concrete cutback
9.7 Anode installation
10 Curing methods
11 Inspection and testing
11.1 General
11.2 Test procedures
11.3 Retesting
11.4 Test results
12 Repair of concrete coated pipe
12.1 General
12.2 Damaged areas
12.3 Cracks
12.4 Gaps
12.5 Stripping
13 Markings
14 Handling and storage
15 Test reports and certificate of compliance
Annex A (normative) Water absorption test
Annex B (normative) Shear resistance test
Bibliography
