AS/NZS 4798(Int):2005

AS/NZS 4798 (Int):2005 POLYETHYLENE MAINTENANCE SHAFTS

PREFACE

CONTENTS

SECTION 1 SCOPE AND GENERAL

1.1 SCOPE

1.2 LIMITATIONS

1.3 REFERENCED DOCUMENTS

1.4 DEFINITIONS

1.4.1 Maintenance shaft (MS)

1.4.2 Maintenance shaft chamber

1.4.3 Maintenance shaft riser

1.4.4 Average service temperature (Tms)

1.4.5 Depth

1.4.6 Effective seal

1.4.7 Effective sealing length

SECTION 2 GENERAL REQUIREMENTS

2.1 SCOPE

2.2 MATERIAL

2.2.1 Reprocessable and recyclable polyethylene material

2.3 THERMAL STABILITY

2.4 TENSILE PROPERTIES

2.5 SLOW CRACK GROWTH RESISTANCE

2.6 MATERIAL DATA SHEETS

2.7 WEATHERING RESISTANCE FOR HANDLING AND STORAGE

2.8 CARBON BLACK

2.9 DISPERSION

2.10 FREEDOM FROM DEFECTS

2.10.1 General

2.10.2 Ends

2.10.3 Joints

2.11 REQUIREMENTS FOR ELASTOMERIC SEALS

2.12 ADHESIVE JOINTS

2.13 REQUIREMENTS FOR MS RISER SECTIONS

2.14 PACKAGING, STORAGE AND TRANSPORTATION

SECTION 3 DESIGN

3.1 GENERAL

3.2 ACCESSIBILITY

3.3 CHAMBER WALL THICKNESS

3.4 STRUCTURAL INTEGRITY OF THE CHAMBER

3.4.1 General

3.4.2 Design verification by structural analysis

3.4.3 Design verification by type tests

3.5 RISER

3.5.1 Riser stiffness

3.5.2 Riser and riser joint load resistance

SECTION 4 MANUFACTURE

4.1 CONFIGURATIONS

4.2 DIMENSIONS AND TOLERANCES

4.2.1 General

4.2.2 Riser

4.2.3 Chamber wall thickness

4.3 WELDING

4.3.1 Welding

4.3.2 Training and Certification

SECTION 5 PERFORMANCE REQUIREMENTS

5.1 GENERAL

5.2 VACUUM TEST

5.3 ACCESSIBILITY

5.4 WELDED JOINTS

5.5 ELASTOMERIC SEAL JOINTS

5.5.1 General

5.5.2 Hydrostatic pressure test

5.5.3 Liquid infiltration test

5.5.4 Contact width and pressure

5.5.5 Load resistance of MS riser and joints

5.6 VACUUM-BATCH RELEASE TEST (BRT)

5.7 THERMAL STABILITY-BATCH RELEASE TEST (BRT)

SECTION 6 MARKING REQUIREMENTS

6.1 MARKING

6.2 ADDITIONAL MARKING WITH ADHESIVE LABEL

APPENDIX A - COMPLIANCE WITH THIS STANDARD

A1 SCOPE

A2 RELEVANCE

A3 DEFINITIONS

A1.1 Acceptable quality level (AQL)

A1.2 Batch

A1.3 Batch release test (BRT)

A1.4 Inspection level

A1.5 Lot

A1.6 Process verification test (PVT)

A1.7 Sample

A1.8 Sampling plan

A1.9 Type test (TT)

A4 PRODUCT CERTIFICATION

A5 MINIMUM SAMPLING AND TESTING FREQUENCY PLAN

A5.1 General

A5.2 Retesting

A5.3 Rejection after retest

APPENDIX B - REQUIREMENTS FOR STRUCTURAL ANALYSIS

B1 SCOPE

B2 PRINCIPLE

B3 REQUIREMENTS

B4 TEST REPORT

APPENDIX C - METHOD FOR LOAD TESTING

C1 SCOPE AND GENERAL

C1.1 Scope

C1.2 Relevance of test

C1.3 Preparation of test assemblies

C2 Apparatus

C3 TEST PROCEDURE

C3.1 Principle

C3.2 Procedure for load test

C3.3 Report

APPENDIX D - METHOD FOR DESIGN VERIFICATION BY TYPE TESTING

D1 SCOPE AND GENERAL

D1.1 Scope

D1.2 Relevance of test

D1.3 Preparation of test assemblies

D2 TYPE TEST

D2.1 Principle

D2.2 Apparatus

D2.3 Personnel

D2.4 Procedure

D3 TEST REPORT