AS/NZS 4766(INT):2002

1 - AS/NZS 4766(Int):2002 POLYETHYLENE STORAGE TANKS FOR WATER AND CHEMICALS
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE AND LIMITATIONS
6 - 1.1 Scope
6 - 1.2 Limitations
6 - 2 OBJECTIVE
7 - 3 REFERENCED DOCUMENTS
8 - 4 DEFINITIONS
8 - 4.1 Service factor
8 - 4.2 Service Temperature
8 - 5 MATERIALS
8 - 5.1 Compounds
8 - 5.2 Melt flow rate (MFR)
8 - 5.3 Reuse of material
8 - 5.4 Stress-cracking resistance
9 - 5.5 Thermal stability of base resin
9 - 5.6 Carbon black
9 - 5.7 Dispersion of additives and pigments
9 - 5.7.1 Non-UV-stabilized base resins
9 - 5.7.2 UV-stabilized base resins
9 - 5.7.3 Light penetration
9 - 5.8 UV resistance
9 - 5.9 Chemical resistance
10 - 5.10 Materials in contact with drinking water and food
10 - 6 DESIGN
10 - 6.1 Fitness for purpose
10 - 6.2 Wall thickness
10 - 6.3 Material test data
11 - 6.4 Roof
11 - 6.5 Floor
11 - 6.6 Open-top tanks
11 - 6.7 Fittings
11 - 7 DIMENSIONS AND TOLERANCES
11 - 7.1 Dimensions
11 - 7.2 Tolerances
11 - 7.2.1 Outside diameter
11 - 7.2.2 Shell wall and head thickness
11 - 8 TANK CAPACITY
11 - 9 FITTINGS
12 - 10 WORKMANSHIP
12 - 11 HANDLING, STORAGE AND PACKING
12 - 12 MARKING REQUIREMENTS
13 - APPENDIX A - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
13 - A1 SCOPE
13 - A2 RELEVANCE
13 - A3 DEFINITIONS
13 - A3.1 Acceptable quality level (AQL)
13 - A3.2 Batch
13 - A3.3 Batch release test (BRT)
13 - A3.4 Inspection level
13 - A3.5 Lot
13 - A3.6 New formulation
13 - A3.7 Process verification test (PVT)
14 - A3.8 Sample
14 - A3.9 Sampling plan
14 - A3.10 Type test (TT)
14 - A4 PRODUCT CERTIFICATION
14 - A5 MINIMUM SAMPLING AND TESTING FREQUENCY PLAN
14 - A5.1 General
14 - A5.2 Retesting
14 - A5.3 Rejection after test
16 - APPENDIX B - THERMAL STABILITY TEST
16 - B1 SCOPE
16 - B2 PRINCIPLE
16 - B3 APPARATUS
16 - B4 PREPARATION OF TEST SAMPLES
16 - B5 PROCEDURE
17 - B6 TEST REPORT
18 - APPENDIX C - HYDROSTATIC DESIGN HOOP STRESS
18 - C1 WALL THICKNESS
18 - C2 HYDROSTATIC DESIGN STRESS
18 - C3 DERATING
19 - APPENDIX D - LOW TEMPERATURE IMPACT TEST
19 - D1 SCOPE
19 - D2 PRINCIPLE
19 - D3 RELEVANCE
19 - D4 DEFINITIONS
19 - D4.1 Brittle failure
19 - D4.2 Ductile failure
19 - D4.3 Drop height
19 - D5 CONDITIONING
19 - D6 PROCEDURE
19 - D6.1 Test specimen
20 - D6.2 Procedure
20 - D7 REPORT

Specifies requirements for the design and manufacture of cylindrical upright ribbed or straight walled polyethylene storage tanks that are rotationally moulded in one piece seamless construction. The tanks are for above ground, vertical installation and are capable of containing water, liquids used in food and beverage manufacture and chemical solutions at atmospheric pressure.

This Standard specifies requirements for the design and manufacture of cylindrical upright ribbed or straight walled polyethylene storage tanks that are rotationally moulded in one-piece seamless construction. The tanks are for aboveground, vertical installation and are capable of containing water, liquids used in food and beverage manufacture and chemical solutions at atmospheric pressure. Methods for demonstrating compliance with this standard are given in Appendix A.

First published as AS/NZS 4766(Int):2002.