ISO 19899:2010
(Main)Plastics piping systems — Polyolefin pipes and mechanical fitting assemblies — Test method for the resistance to end load (AREL test)
Plastics piping systems — Polyolefin pipes and mechanical fitting assemblies — Test method for the resistance to end load (AREL test)
ISO 19899:2010 specifies a method to determine, for mechanically jointed polyolefin pipe and fitting assemblies in sizes of nominal outside diameter of less than or equal to 63 mm, the effect of component relaxation and creep on the resistance of the assembly to pipe pull out under the long-term application of a constant and longitudinally applied force.
Systèmes de canalisations en matières plastiques — Assemblages de tubes en polyoléfines et raccords mécaniques — Méthode d'essai de résistance en fin de charge (essai AREL)
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 19899
First edition
2010-09-15
Plastics piping systems — Polyolefin
pipes and mechanical fitting
assemblies — Test method for the
resistance to end load (AREL test)
Systèmes de canalisations en matières plastiques — Assemblages de
tubes en polyoléfines et raccords mécaniques — Méthode d'essai de
résistance en fin de charge (essai AREL)
Reference number
ISO 19899:2010(E)
©
ISO 2010
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ISO 19899:2010(E)
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ii © ISO 2010 – All rights reserved
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ISO 19899:2010(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Principle .2
5 Apparatus.2
5.1 Tensile loading equipment .2
5.2 External environment.2
5.3 Leak test apparatus.3
6 Test piece .3
7 Procedure.4
8 Test report.4
Annex A (normative) End load forces for PE 80 pipes and PE 100 pipes.5
Bibliography.7
© ISO 2010 – All rights reserved iii
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ISO 19899:2010(E)
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.
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 19899 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and
their accessories — Test methods and basic specifications.
iv © ISO 2010 – All rights reserved
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ISO 19899:2010(E)
Introduction
The Accelerated Relaxation and End Load test (AREL) was introduced initially in the gas industry product
standard for full end-load-bearing mechanical fittings designed for connection to PE gas pipes. Its introduction
as a stand-alone test method covering polyolefin pipes provides the opportunity for the method to be used in
other application areas.
© ISO 2010 – All rights reserved v
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INTERNATIONAL STANDARD ISO 19899:2010(E)
Plastics piping systems — Polyolefin pipes and mechanical
fitting assemblies — Test method for the resistance to end load
(AREL test)
1 Scope
This International Standard specifies a method to determine, for mechanically jointed polyolefin pipe and fitting
assemblies in sizes of d u 63 mm, the effect of component relaxation and creep on the resistance of the
n
assembly to pipe pull out under the long-term application of a constant and longitudinally applied force.
The susceptibility of the polyolefin pipe to stress crack failure initiated by the joint assembly is also examined.
NOTE For sizes d > 63 mm, the method is under development.
n
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.
ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids ― Determination of
the resistance to internal pressure ― Part 1: General method
ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids ― Determination of
the resistance to internal pressure ― Part 4: Preparation of assemblies
ISO 3458, Assembled joints between fittings and polyethylene (PE) pressure pipes ― Test of leakproofness
under internal pressure
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
lower confidence limit of the predicted hydrostatic strength
σ
LPL
quantity, with the dimensions of stress, which represents the 97,5 % lower confidence limit of the predicted
hydrostatic strength at a temperature θ and time t
NOTE 1 The quantity is expressed in megapascals.
NOTE 2 Temperature, θ, is expressed in degrees Celsius and time, t, is expressed in years.
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ISO 19899:2010(E)
3.2
minimum required strength
MRS
value of σ at 20 °C and 50 years, rounded down to the next smaller value of the R10 series or the R20
LPL
series
[1] [2]
NOTE The R10 series conforms to ISO 3 , the R20 series conforms to ISO 497 .
3.3
standard dimension ratio
SDR
ratio of the nominal outside diameter, d , of a pipe to its nominal wall thickness, e
n n
4 Principle
A test piece assembly of a polyolefin pipe(s) and a mechanical fitting, suspended in a bath of water or in air at
80 °C is subjected to a constant tensile force, F, applied along the longitudinal axis of the pipe for a defined
period of time. The force, F, is then removed and the assembly conditioned to 23 °C before testing for
leakage.
NOTE 1 The magnitude of the applied force is intended to simulate the combined effect of internal pressure, thermal
contraction and secondary bending effects arising from loss of soil support around the pipe close to the fitting. For sizes
d W 355 mm, experience has suggested loss of localized soil support is less likely to result in significant longitudinal
n
bending stresses and consequently th
...
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