Australian/New Zealand Standard: Buried Flexible Pipelines Part 1: Structural Design
Australian/New Zealand Standard: Buried Flexible Pipelines Part 1: Structural Design
Australian/New Zealand Standard: Buried Flexible Pipelines Part 1: Structural Design
1:1998
STANDARDS AUSTRALIA
1 The Crescent,
Homebush NSW 2140 Australia
STANDARDS NEW ZEALAND
Level 10, Radio New Zealand House,
155 The Terrace,
Wellington 6001 New Zealand
ISBN 0 7337 1627 X
AS/NZS 2566.1:1998 2
PREFACE
This Standard was prepared by the Joint Standards Australia/Standards New Zealand
Committee WS/28, Design and Installation of Buried Flexible Pipes, to supersede
AS 2566 1982, Plastics pipelaying design.
This Standard is one of a proposed series which deal with buried flexible pipes. The series
so far comprises:
Part 1: Structural design (this Standard).
Part 2: Installation (in course of preparation).
The objective of this Standard is to provide designers with procedures for the structural
design of buried flexible pipelines.
Published concurrently with this Standard is AS/NZS 2566.1 Supp 1, Buried flexible
pipeline Part 1: Structural design Commentary (Supplement to AS 2566.1 1997,
which contains additional information on and explanations of particular technical aspects
of this Standard. It also includes an appendix with examples showing the applications of
the provisions of this Standard.
Statements expressed in mandatory terms in notes to figures and tables are deemed to be
requirements of this Standard.
The term normative has been used in this Standard to define the application of the
appendix to which it applies. A normative appendix is an integral part of a Standard.
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CONTENTS
Page
SECTION 5 DESIGN
5.1 DESIGN CRITERIA AND SCOPE ... .. .. .. .. ... ............. .. 23
5.2 DEFLECTION . . . . . . . . . . . . . . .... .. .. .... . .. . .. .. .. .. ... ... 23
5.3 STRENGTH . . . . . . . . . . . . . . . .... .. .. .... ... .. .. .. .. ... .... 23
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APPENDICES
A LIST OF REFERENCED DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
B PRODUCT STANDARDS FOR FLEXIBLE PIPES . . . . . . . . . . . . . . . . . . . 29
C EMBEDMENT MATERIALSMAXIMUM PARTICLE SIZE AND
GRADING LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
AS/NZS 2566.1:1998 4
S E C T I O N 1 S CO P E A N D G E NE R A L
1.1 SCOPE This Standard sets out a practice for the structural design of buried
flexible pipelines which rely primarily upon side support to resist vertical loads without
excessive deformation. The interactive pipe/embedment structure is considered only in the
transverse direction. Structural performance is predicted in the long-term for pipes in
trenches and embankments but not for jacked or bored lines. For the purposes of this
Standard, the long-term design basis is 50 years, to take account of creep and other time-
dependent effects. The equations used in this Standard apply to pipes with outside
diameters equal to or greater than 75 mm, initial ring-bending stiffness equal to or greater
than 1250 N/m/m and long-term ring-bending stiffness equal to or greater than
625 N/m/m.
This Standard provides methods and data for calculating the response of a pipe to
loadings from
(a) soil;
(b) superimpositions on the soil; and
(c) both positive and negative internal pressures.
1.2 APPLICATION This Standard provides a basis for assessing the selection of pipe
class and embedment methods. It applies to flexible pipes conveying water, waste water,
stormwater or slurry, for both pressure and non-pressure applications, or as conduits for
the later installation of cables or pipes.
This Standard is applicable to flexible pipes, manufactured from the materials listed in the
table below, that are
(a) homogeneous or composite;
(b) creep affected (plastics) or unaffected (metallic); or
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Abbreviation Material
Plastics
ABS Acrylonitrile butadiene styrene
GRP Glass filament reinforced plastics
PVC Polyvinyl chloride
OPVC Oriented PVC
PE Polyethylene
Metallic
AL Aluminium
DI Ductile iron
MS Steel
COPYRIGHT
AS/NZS 2566.1:1998 Buried flexible pipelines - Structural
design
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