ISO/TR 10465-2:2007
(Main)Underground installation of flexible glass-reinforced pipes based on unsaturated polyester resin (GRP-UP) — Part 2: Comparison of static calculation methods
Underground installation of flexible glass-reinforced pipes based on unsaturated polyester resin (GRP-UP) — Part 2: Comparison of static calculation methods
ISO/TR 10465-2:2007 presents a comparison of the ATV and AWWA methods for static calculations on underground GRP pipe installations. It is intended that this comparison will encourage the use of both procedures for GRP pipes conforming to International Standards. It is not the intent of ISO/TR 10465-2 to cover all the details of the two methods. Some aspects are, of necessity, very complex, and for a full understanding the original documents need to be studied in detail. Rather, the intention is to give a general overview and comparison of the key elements so that the user can more easily understand and appreciate the differences between the two procedures and their similarities.
Installation enterrée de canalisations flexibles renforcées de fibres de verre à base de résine polyester insaturée (GRP-UP) — Partie 2: Comparaison de méthodes de calcul statique
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TECHNICAL ISO/TR
REPORT 10465-2
Second edition
2007-09-01
Underground installation of flexible
glass-reinforced pipes based
on unsaturated polyester resin
(GRP-UP) —
Part 2:
Comparison of static calculation methods
Installation enterrée de canalisations flexibles renforcées de fibres
de verre à base de résine polyester insaturée (GRP-UP) —
Partie 2: Comparaison de méthodes de calcul statique
Reference number
©
ISO 2007
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ii © ISO 2007 – All rights reserved
Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Symbols and abbreviated terms .1
4 Soil-load distribution.10
5 Soil load .10
5.1 General.10
5.2 Initial loadings.10
5.3 Long-term loading .15
6 Traffic loads.15
6.1 General.15
6.2 AWWA procedure .16
6.3 ATV procedure .18
7 Deflections.20
7.1 Resulting from vertical load .20
7.2 Aspects not covered by AWWA or ATV .26
7.3 Irregularities in the installation .26
8 Circumferential bending strain.27
8.1 AWWA procedure .27
8.2 ATV procedure .27
9 Buckling.29
9.1 General.29
9.2 AWWA procedure .29
9.3 ATV procedure .31
10 Internal-pressure effects.34
10.1 General.34
10.2 Pressure strain.34
10.3 Combined loading.34
10.4 Calculations based on stress .35
Bibliography .36
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In exceptional circumstances, when a technical committee has collected data of a different kind from that
which is normally published as an International Standard (“state of the art”, for example), it may decide by a
simple majority vote of its participating members to publish a Technical Report. A Technical Report is entirely
informative in nature and does not have to be reviewed until the data it provides are considered to be no
longer valid or useful.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TR 10465-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 6, Reinforced plastics pipes and fittings for all applications.
This second edition cancels and replaces the first edition (ISO/TR 10465-2:1999), which has been technically
revised to take into account changes made to methods in base documents ATV-A 127 and AWWA M-45 (see
Introduction).
ISO 10465 consists of the following parts, under the general title Underground installation of flexible glass-
reinforced pipes based on unsaturated polyester resin (GRP-UP):
⎯ Part 1: Installation procedures [Technical Specification]
⎯ Part 2: Comparison of static calculation methods [Technical Report]
⎯ Part 3: Installation parameters and application limits [Technical Report]
iv © ISO 2007 – All rights reserved
Introduction
Work in ISO/TC 5/SC 6 (now ISO/TC 138) on writing International Standards for the use of glass-reinforced
plastics (GRP) pipes and fittings was approved at the subcommittee meeting in Oslo in 1979. An ad hoc group
was established and the responsibility for drafting various International Standards was later given to a Task
Group (now ISO/TC 138/SC 6).
At the SC 6 meeting in London in 1980, Sweden proposed that a working group be formed to develop
documents regarding a code of practice for GRP pipes. This was approved by SC 6, and Working Group 4
(WG 4) was formed for this purpose. Since 1982, many WG 4 meetings have been held which have
considered the following matters:
⎯ procedures for the underground installation of GRP pipes;
⎯ pipe/soil interaction with pipes having different stiffness values;
⎯ minimum design parameters;
⎯ overview of various static calculation methods.
During the work of WG 4, it became evident that unanimous agreement could not be reached within the
working group on the specific methods to be employed to address these issues. It was therefore agreed that
all parts of the code of practice should be made into a type 3 Technical Report, and this was the form in which
this part of ISO 10465 was first published in 1999. Since then the ISO rules dealing with the classification of
document types have been revised and this has resulted in the three parts of ISO 10465 now being published
as either a Technical Specification or a Technical Report.
ISO 10465-1, published as Technical Report in 1993 and revised as a Technical Specification in 2007,
describes procedures for the underground installation of GRP pipes. It concerns particular stiffness classes for
which performance requirements have been specified in at least one product standard, but it can also be used
as a guide for the installation of pipes of other stiffness classes.
This part of ISO 10465, published as a Technical Report in 1999 and revised in 2007, presents a comparison
of the two primary methods used internationally for static calculations on underground GRP pipe installations.
These methods are
a) the ATV method given in ATV-A 127, Guidelines for static calculations on drainage conduits and
pipelines, and
b) the AWWA method given in AWWA manual M-45, Fiberglass pipe design.
ISO 10465-3, published as a Technical Report in 2007, gives additional information, which is useful for static
calculations primarily when using an ATV-A 127 type design system in accordance with this part of
ISO 10465, on items such as:
parameters for deflection calculations;
soil parameters, strain coefficients and shape factors for flexural-strain calculations;
soil moduli and pipe stiffness for buckling calculations with regard to elastic behaviour;
parameters for rerounding and combined-loading calculations;
the influence of traffic loads;
the influence of sheeting;
safety factors.
This Technical Report is not to be regarded as an International Standard. It is proposed for provisional
application so that experience may be gained on its use in practice. Comments should be sent to the
secretariat of TC 138/SC 6.
vi © ISO 2007 – All rights reserved
TECHNICAL REPORT ISO/TR 10465-2:2007(E)
Underground installation of flexible glass-reinforced pipes
based on unsaturated polyester resin (GRP-UP) —
Part 2:
Comparison of static calculation methods
1 Scope
This part of ISO 10465 presents a comparison of the ATV and AWWA methods for static calculations on
underground GRP pipe installations. It is intended that this comparison will encourage the use of both
procedures for GRP pipes conforming to International Standards.
It is not the intent of this part of ISO 10465 to cover all the details of the two methods. Some aspects are, of
necessity, very complex, and for a full understanding the original documents need to be studied in detail.
Rather, the intention is to give a general overview and comparison of the key elements so that the user can
more easily understand and appreciate the differences between the two procedures and their similarities.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ATV-A 127, Guidelines for static calculations on drainage conduits and pipelines, 3rd edition, August 2000
(German Association for Water Pollution Control)
AWWA M-45, Fiberglass pipe design manual M-45, 2005 (American Water Works Association)
3 Symbols and abbreviated terms
For the purposes of this document, the following symbols apply.
NOTE 1 This clause also contains symbols and abbreviations from ISO 10465-1 and ISO 10465-3 for completeness.
NOTE 2 Several identical symbols are used in ATV-A 127 and AWWA M-45 to represent different quantities, and
where this occurs, the origin of the symbol is given in the rightmost column.
NOTE 3 The format of the symbols listed here
...
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