AS 4321-2001

1 - AS 4321-2001 FUSION-BONDED MEDIUM-DENSITY POLYETHYLENE COATING AND LINING FOR PIPES AND FITTINGS
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
7 - 3 DEFINITIONS
7 - 3.1 Coating
7 - 3.2 Fusion bond
7 - 3.3 Holiday
7 - 3.4 Joint region
7 - 3.5 Lining
7 - 3.6 Outside diameter
7 - 3.7 Reinstatement
7 - 3.8 Repair
7 - 3.9 Surface preparation
8 - 4 MATERIALS
8 - 4.1 General
8 - 4.2 Polyethylene coating (and lining) compound
8 - 4.2.1 Composition
8 - 4.2.2 Dispersion of additives
8 - 4.3 Polyethylene reinstatement compound
8 - 4.3.1 Composition
8 - 4.3.2 Dispersion of additives
8 - 5 COATING AND LINING APPLICATION
8 - 5.1 Preparation of surface
8 - 5.2 Application
9 - 5.3 Cleaning of pipe and fitting ends
9 - 5.4 End treatment
9 - 6 TEST REQUIREMENTS
9 - 6.1 Type test
9 - 6.1.1 General
9 - 6.1.2 Polyethylene coating (and lining) compound
10 - 6.1.3 Polyethylene reinstatement compound
10 - 6.2 Application process qualification
10 - 6.3 Production tests
10 - 6.3.1 General
10 - 6.3.2 Thickness
10 - 6.3.3 Continuity test
11 - 6.3.4 Bond strength
11 - 7 REINSTATEMENT
11 - 7.1 General
12 - 7.2 Application of reinstatement
12 - 7.3 Reinstatement test requirements
12 - 8 REPAIRS
12 - 8.1 General
13 - 8.2 Repair limits
13 - 8.2.1 Coating repairs
13 - 8.2.2 Lining repairs
13 - 8.3 Repair test methods
13 - 9 TEST FREQUENCY
14 - 10 EFFECT OF FBPE LINING ON WATER QUALITY
14 - 11 STORAGE, HANDLING, TRANSPORT AND MARKING
14 - 11.1 Handling and storage of coated pipes and fittings
14 - 11.2 Transport of coated pipes and fittings
14 - 11.3 Marking
15 - APPENDIX A - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
15 - A1 SCOPE
15 - A2 RELEVANCE
15 - A3 DEFINITIONS
15 - A3.1 Acceptable quality level (AQL)
15 - A3.2 Batch
15 - A3.3 Batch release test (BRT)
15 - A3.4 Inspection level
15 - A3.5 Lot
15 - A3.6 Material or compound batch
15 - A3.7 Production batch
16 - A3.8 New formulation
16 - A3.9 Process verification test (PVT)
16 - A3.10 Sample
16 - A3.11 Sampling plan
16 - A3.12 Type test (TT)
16 - A4 PRODUCT CERTIFICATION
16 - A5 MINIMUM SAMPLING AND TESTING FREQUENCY PLAN
16 - A5.1 General
17 - A5.2 Retesting
17 - A5.3 Rejection after retest
17 - A6 TYPE TESTING FOR RE-EVALUATION
17 - A6.1 Change in material/compound
17 - A6.2 Required type tests
20 - APPENDIX B - PURCHASING GUIDELINES
20 - B1 GENERAL
20 - B2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
21 - APPENDIX C - THERMAL STABILITY TEST
21 - C1 SCOPE
21 - C2 PRINCIPLE
21 - C3 APPARATUS
21 - C4 PREPARATION OF TEST PIECE
21 - C5 PROCEDURE
21 - C6 TEST REPORT
22 - APPENDIX D - WATER ABSORPTION TEST
22 - D1 SCOPE
22 - D2 PRINCIPLE
22 - D3 APPARATUS
22 - D4 PREPARATION OF TEST PIECE
22 - D5 PROCEDURE
22 - D6 TEST REPORT
23 - APPENDIX E - PENETRATION RESISTANCE TEST
23 - E1 SCOPE
23 - E2 PRINCIPLE
23 - E3 APPARATUS
23 - E4 PREPARATION OF TEST PIECE
23 - E5 PROCEDURE
23 - E6 TEST REPORT
24 - APPENDIX F - METHOD FOR THE DETERMINATION OF TENSILE STRESS AT YIELD
24 - F1 SCOPE
24 - F2 PRINCIPLE
24 - F3 APPARATUS
24 - F4 PREPARATION OF TEST PIECES
24 - F5 CONDITIONING
24 - F6 PROCEDURE
24 - F7 REPORT
25 - APPENDIX G - METHOD FOR THE DETERMINATION OF ENVIRONMENTAL STRESS-CRACKING RESISTANCE
25 - G1 SCOPE
25 - G2 PRINCIPLE
25 - G3 APPARATUS
25 - G4 REAGENT
25 - G5 PREPARATION OF TEST PIECES
25 - G6 CONDITIONING
25 - G7 PROCEDURE
25 - G8 REPORT
26 - APPENDIX H - PREPARATION OF COATING AND LINING TEST SPECIMENS
26 - H1 SCOPE
26 - H2 PRINCIPLE
26 - H3 APPARATUS
26 - H4 REMOVAL OF SAMPLE FROM TEST PIPE
26 - H5 PREPARATION OF TEST SPECIMENS
26 - H6 PROCEDURE
28 - APPENDIX I - IMPACT RESISTANCE TEST
28 - I1 SCOPE
28 - I2 PRINCIPLE
28 - I3 PREPARATION OF COATED TEST PIPE
28 - I4 PROCEDURE
28 - I5 REPORT
29 - APPENDIX J - ADHESION OF POLYETHYLENE REINSTATEMENT COMPOUND TO STEEL
29 - J1 SCOPE
29 - J2 PRINCIPLE
29 - J3 APPARATUS
29 - J4 PREPARATION OF TEST PIECE
29 - J5 PROCEDURE
29 - J6 TEST REPORT
30 - APPENDIX K - ADHESION OF POLYETHYLENE REINSTATEMENT COMPOUND TO
30 - K1 SCOPE
30 - K2 PRINCIPLE
30 - K3 APPARATUS
30 - K4 PREPARATION OF TEST PIECE
30 - K5 PROCEDURE
30 - K6 TEST REPORT
31 - APPENDIX L - CATHODIC DISBONDING RESISTANCE TEST
31 - L1 SCOPE
31 - L2 PRINCIPLE
31 - L3 APPARATUS
31 - L3.1 General equipment
32 - L3.2 Cathodic disbonding test cells
32 - L4 PREPARATION OF TEST SAMPLE
32 - L5 TEST PROCEDURE
33 - L6 REPORT
36 - APPENDIX M - CONTINUITY TEST
36 - M1 SCOPE
36 - M2 APPARATUS
36 - M3 VOLTAGE SETTING AND CALIBRATION
36 - M4 PROCEDURE
36 - M4.1 FBPE coated or lined pipes with exposed steel
36 - M4.2 FBPE coated pipes with no exposed steel but with a cement mortar lining
37 - M4.3 FBPE coated and lined pipe completely covered with FBPE
37 - M4.4 Testing
37 - M5 REPORT
38 - APPENDIX N - BOND STRENGTH TEST
38 - N1 SCOPE
38 - N2 PRINCIPLE
38 - N3 APPARATUS
38 - N4 PREPARATION OF TEST PIECE
38 - N5 TEST CONDITIONS
38 - N6 PROCEDURE
39 - N7 REPORT

Specifies requirements for factory-applied fusion-bonded medium-density polyethylene coatings for pipes and fittings, for protection against corrosion at operating temperatures between -40 degrees Celsius and plus 50 degrees Celsius. It is intended for use by specifiers, applicators, manufacturers and purchasers of steel water pipeline.

This Standard specifies requirements for factory-applied fusion-bonded medium-density polyethylene coating and lining of pipes and fittings, for protection against corrosion. Polyethylene materials complying with this Standard are intended for application to pipes and fittings where the pipeline operating temperatures are not less than -40C nor more than 70C for the coating and 50C for the lining.The coating is intended for use on pipes and fittings for underground and underwater service, including steel piling. The lining is intended for use on pipes and fittings for pipelines conveying wastewater and water intended for human consumption.Methods for determining compliance with this Standard are given in Appendix A.NOTE: Guidelines on requirements that are to be specified by the purchaser at the time of enquiry or order are given in Appendix B.

First published as AS 4321-1995.
Second edition 2001.
Reconfirmed 2019. Originated as AS 4321-1995. Second edition 2001.