ISO 21809-5:2017
Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 5: External concrete coatings
ISO 21809-5:2017 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 as defined in ISO 13623.
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.
ISO 21809-5:2017 is applicable to concrete thicknesses of 25 mm or greater.
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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 document
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
9.4.1 Pre-coated pipe
9.4.2 Bare pipe
9.5 Steel reinforcement
9.5.1 General
9.5.2 Cage reinforcement
9.5.3 Welded wire mesh reinforcement
9.5.4 Woven wire mesh reinforcement
9.5.5 Reinforcement placement
9.6 Concrete cutback
9.7 Anode installation
10 Curing methods
11 Inspection and testing
11.1 General
11.2 Test procedures
11.2.1 Concrete coating thickness — Diameter measurement
11.2.2 Placement of reinforcement
11.2.3 Pre-concrete coated pipe weight in air
11.2.4 Concrete coated pipe weight in air
11.2.5 Concrete coating density
11.2.6 Compressive strength
11.2.7 Water absorption
11.2.8 Impact resistance
11.2.9 Shear resistance
11.2.10 Visual inspection
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 inspection documents
Annex A (normative) Water absorption test
Annex B (normative) Shear resistance test
Bibliography
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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 document
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
9.4.1 Pre-coated pipe
9.4.2 Bare pipe
9.5 Steel reinforcement
9.5.1 General
9.5.2 Cage reinforcement
9.5.3 Welded wire mesh reinforcement
9.5.4 Woven wire mesh reinforcement
9.5.5 Reinforcement placement
9.6 Concrete cutback
9.7 Anode installation
10 Curing methods
11 Inspection and testing
11.1 General
11.2 Test procedures
11.2.1 Concrete coating thickness — Diameter measurement
11.2.2 Placement of reinforcement
11.2.3 Pre-concrete coated pipe weight in air
11.2.4 Concrete coated pipe weight in air
11.2.5 Concrete coating density
11.2.6 Compressive strength
11.2.7 Water absorption
11.2.8 Impact resistance
11.2.9 Shear resistance
11.2.10 Visual inspection
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 inspection documents
Annex A (normative) Water absorption test
Annex B (normative) Shear resistance test
Bibliography