Standard
UPDATE AVAILABLE
AS 4822:2018
[Superseded]External field joint coatings for steel pipelines
This Standard sets out minimum requirements for the field joint coating (FJC) of seamless and welded steel buried onshore pipelines.
Published: 18/07/2018
Pages: 69
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
1.4 Symbols and abbreviated terms
1.4.1 Symbols
1.4.2 Abbreviated terms
1.5 General requirements—Field Joint Coatings (FJCs)
2 Selection of FJCs
2.1 General
2.2 Types of FJCs
3 Application
3.1 Application Procedure Specification (APS)
3.2 Coating materials
3.2.1 Information to be supplied
3.2.2 Marking on shipment of coating materials
3.3 Procedure Qualification Trial (PQT)
3.4 Qualification of coating and inspection personnel
3.5 pre-production trial (PPT)
3.6 Production testing and inspection
4 Surface preparation, application, inspection, testing, repair and safety
4.1 Surface preparation
4.1.1 General
4.1.2 Preparation of the steel substrate
4.1.2.1 General
4.1.2.2 Abrasive blast cleaning
4.1.2.3 Wire brush cleaning
4.1.2.4 Reconditioning
4.1.2.5 Preparation of the adjoining factory-applied coating
4.2 Preliminary quality inspection
4.3 Prior to the application of the coating
4.4 Visual inspection of the applied coating
4.5 Testing of the FJC and repairs
4.6 Safety considerations
5 Petrolatum and polymeric tape coatings
5.1 General
5.2 Description of the coatings
5.2.1 Petrolatum tapes (Type 1A)
5.2.2 Polymeric tapes (Type 1B)
5.3 Surface preparation
5.4 Application of the coatings
5.4.1 General
5.4.2 Application of the primer
5.4.3 Application of petrolatum tapes
5.4.4 Application of polymeric tape
5.5 Inspection and testing of the applied coatings
5.5.1 General
5.5.2 General inspection
5.5.3 Thickness
5.5.4 Holiday detection
5.5.5 Impact resistance
5.5.6 Indentation resistance
5.5.7 Drip resistance
5.5.8 Cathodic disbondment
5.5.9 Peel strength between tape layers of polymeric tapes
5.5.10 Peel strength to pipe surface and factory-applied coating
5.5.10.1 General
5.5.10.2 Petrolatum tapes (Type 1A)
5.5.10.3 Polymeric tapes (Type 1B)
5.5.10.4 Peel strength after immersion in water
5.5.11 Lap shear strength of bituminous and polymeric tapes
5.5.12 Thermal ageing resistance of polymeric tapes
6 Heat-shrinkable coatings
6.1 General
6.2 Description of the coatings
6.2.1 General
6.2.2 Type 2A
6.2.3 Type 2B
6.3 Surface preparation
6.4 Application of the coatings
6.4.1 General
6.4.2 Preheating the joint
6.4.3 Application of the primer
6.4.4 Application of heat-shrinkable materials
6.5 Inspection and testing of the applied coatings
6.5.1 General
6.5.2 General inspection
6.5.3 Thickness
6.5.4 Holiday detection
6.5.5 Peel strength
6.5.6 Cathodic disbondment
7 Fusion-bonded epoxy powder (FBE) coatings
7.1 General
7.2 Storage conditions
7.3 Containers
7.4 Transport of powder
7.4.1 Containers
7.5 Description of the coatings
7.6 Surface preparation
7.7 Application of the coatings
7.7.1 General
7.7.2 Heating
7.7.3 Application of epoxy powder
7.7.4 Field joint coating repairs
7.8 Inspection and testing of the applied coatings
7.8.1 General
7.8.2 Visual aspect
7.8.3 Thickness
7.8.4 Holiday detection
7.8.5 Adhesion
7.8.6 Degree of cure
7.8.7 Impact resistance
7.8.8 Cathodic disbondment
7.8.9 Hot water soak test
8 Liquid applied coatings
8.1 General
8.2 Description of the coatings
8.2.1 Liquid epoxy (4A)
8.2.2 Liquid polyurethane (4B)
8.2.3 Fibre reinforced epoxy (4C)
8.3 Surface preparation
8.4 Application of the coatings
8.4.1 General
8.4.2 Heating of the area to be coated
8.4.3 Coating application
8.5 Inspection and testing of the applied coatings
8.5.1 General
8.5.2 Thickness
8.5.3 Visual inspection
8.5.4 Holiday detection
8.5.5 Adhesion
8.5.6 Impact resistance
8.5.7 Hardness
8.5.8 Flexibility
8.5.9 Cathodic disbondment
8.5.10 Hot water soak
9 Amorphous Low Viscosity Polyolefin Coatings (ALPVC)
9.1 General
9.2 Description of the coatings
9.3 Surface preparation
9.4 Application of the coatings
9.4.1 General
9.4.2 Application
9.5 Inspection and testing of the applied coatings
9.5.1 General
9.5.2 General inspection
9.5.3 Thickness
9.5.4 Holiday detection
9.5.5 Impact resistance
9.5.6 Indentation resistance
9.5.7 Drip resistance
9.5.8 Cathodic disbondment
9.5.9 Peel strength between tape layers of polymeric tapes
9.5.10 Peel strength to pipe surface and factory-applied coating
9.5.10.1 General
9.5.10.2 Peel strength
9.5.10.3 Peel strength after immersion in water
9.5.11 Lap shear strength
Appendix A
A1 General
A2 Information to be supplied by the purchaser
A3 Information to be supplied by the coating applicator
A4 Certificate of conformance
A5 Certificate of conformance for FJC and traceability
Appendix B
B1 Laboratory measurement of peel strength
B1.1 General
B1.2 Apparatus
B1.3 Procedure
B1.4 Results
B1.5 Test report
B2 Measurement of the peel strength with a spring balance
B2.1 General
B2.2 Equipment
B2.3 Procedure
B2.4 Results
B2.5 Test report
Appendix C
C1 General
C2 Apparatus
C3 Procedure
C4 Results
C5 Test report
Appendix D
D1 General
D2 Apparatus
D3 Procedure
D4 Results
D5 Test report
Appendix E
E1 Scope
E2 Apparatus
E3 Test specimens
E4 Procedure
E5 Result
E6 Test report
Appendix F
F1 General
F2 Apparatus
F3 Preparation of the test specimen
F4 Procedure
F5 Results
F6 Test report
Appendix G
G1 Lap shear strength of tape coatings
G1.1 General
G1.2 Apparatus
G1.3 Preparation of the test specimens
G1.4 Procedure
G1.5 Expression of result
G2 LAP shear strength of shrinkable material coatings
G2.1 General
G2.2 Apparatus
G2.3 Preparation of the test specimens
G2.4 Procedure
G2.5 Expression of result
G3 Test report
Appendix H
H1 General
H2 Apparatus
H3 Preparation of the test specimen
H3.1 General
H3.2 Tapes
H3.3 Shrinkable materials
H4 Procedure
H4.1 General
H4.2 Tapes
H4.3 Expression of results
H5 Test report
Appendix I
I1 Elongation at break
I1.1 General
I1.2 Apparatus
I1.3 Preparation of the test specimens
I1.4 Procedure
I1.5 Expression of result
I2 Peel strength between layers
I2.1 General
I2.2 Apparatus
I2.3 Preparation of the test specimens
I2.4 Procedure
I2.5 Expression of result
I3 Peel strength to pipe surface
I3.1 General
I3.2 Apparatus
I3.3 Preparation of the test specimens
I3.4 Procedure
I3.5 Expression of result
I4 Test report
Appendix J
J1 Scope
J2 Apparatus
J3 Test specimens
J4 Procedure
J5 Report
Appendix K
Bibliography
Cited references in this standard
Content history
[Current]
[Current]
[Superseded]
DR AS 4822:2017
NACE SP0394