ISO 14692-3:2002

INTERNATIONAL ISO
STANDARD 14692-3
First edition
2002-12-15
Petroleum and natural gas industries —
Glass-reinforced plastics (GRP) piping —
Part 3:
System design
Industries du pétrole et du gaz naturel — Canalisations en plastique
renforcé de verre (PRV) —
Partie 3: Conception des systèmes

Reference number
©
ISO 2002
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ii © ISO 2002 — All rights reserved

Contents Page
Introduction . vi
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Symbols and abbreviated terms. 1
5 Layout requirements. 2
5.1 General. 2
5.2 Space requirements. 2
5.3 System supports . 3
5.4 Isolation and access for cleaning . 5
5.5 Vulnerability. 5
5.6 Joint selection . 6
5.7 Fire and blast. 7
5.8 Control of electrostatic discharge. 8
5.9 Galvanic corrosion. 9
6 Hydraulic design . 9
6.1 General. 9
6.2 Flow characteristics. 9
6.3 General velocity limitations . 9
6.4 Erosion. 10
6.5 Water hammer . 10
6.6 Cyclic conditions . 11
7 Structural design. 11
7.1 General. 11
7.2 Manufacturer's pressure rating . 11
7.3 Qualified pressure. 11
7.4 Factored qualified pressure. 12
7.5 System design pressure. 13
7.6 Loading requirements . 14
7.7 Allowable displacements . 16
7.8 Qualified stress . 16
7.9 Factored stress . 16
7.10 Limits of calculated stresses due to loading . 17
7.11 Determination of failure envelope. 18
8 Stress analysis . 25
8.1 Analysis methods . 25
8.2 Analysis requirements. 25
8.3 External pressure/vacuum . 26
8.4 Thermal loading . 27
8.5 Stresses due to internal pressure . 27
8.6 Stresses due to pipe support . 28
8.7 Axial compressive load (buckling). 29
9 Fire performance. 30
9.1 General. 30
9.2 Fire endurance . 31
9.3 Fire reaction. 32
9.4 Fire-protective coatings . 32
10 Static electricity.33
10.1 General .33
10.2 Classification code for control of electrostatic charge accumulation.33
10.3 Mitigation options.33
10.4 Design and documentation requirements .34
10.5 Pipes that contain a fluid with an electrical conductivity more than 10 000 pS/m.36
10.6 Pipes that contain a fluid with an electrical conductivity less than 10 000 pS/m.36
10.7 Pipes exposed to weak/moderate external electrostatic-generation mechanisms.37
10.8 Pipes exposed to strong external electrostatic generation mechanisms.37
10.9 Continuity of electrical path within piping system .38
10.10 Lightning strike.38
11 Installer and operator documentation.38
Annex A (informative) Guidance for design of GRP piping system layout.40
Annex B (informative) Description and guidance on selection of jointing designs .42
Annex C (informative) Guidance on material properties and stress/strain analysis .47
Annex D (normative) Guidance on flexibility analysis.49
Annex E (normative) Calculation of support stresses for large-diameter liquid-filled pipe .59
Annex F (informative) Guidance on quantifying fire performance properties.63
Annex G (informative) Static electricity.68
Annex H (informative) Inspection strategy.76
Bibliography.79

iv © ISO 2002 — All rights reserved

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 14692-3 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 6, Processing equipment and
systems.
ISO 14692 consists of the following parts, under the general title Petroleum and natural gas industries —
Glass-reinforced plastics (GRP) piping:
 Part 1: Vocabulary, symbols, applications and materials
 Part 2: Qualification and manufacture
 Part 3: System design
 Part 4: Fabrication, installation and operation
Introduction
The objective of this part of ISO 14692 is to ensure that piping systems, when designed using the components
qualified in ISO 14692-2, will meet the specified performance requirements. These piping systems are
designed for use in oil and natural gas industry processing and utility service applications. The main users of
the document will be the principal, design contractors, suppliers contracted to do the design, certifying
authorities and government agencies.
An explanation of the pressure terminology used in this part of ISO 14692 is given in ISO 14692-1.

vi © ISO 2002 — All rights reserved

INTERNATIONAL STANDARD ISO 14692-3:2002(E)

Petroleum and natural gas industries — Glass-reinforced
plastics (GRP) piping —
Part 3:
System design
1 Scope
This part of ISO 14692 gives gui
...