ISO 15138:2018

INTERNATIONAL ISO
STANDARD 15138
Third edition
2018-06
Petroleum and natural gas
industries — Offshore production
installations — Heating, ventilation
and air-conditioning
Industries du pétrole et du gaz naturel — Plates-formes de production
en mer — Chauffage, ventilation et climatisation
Reference number
©
ISO 2018
© ISO 2018
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 3
5 Design . 4
5.1 General . 4
5.2 Development of design basis . 6
5.2.1 Orientation and layout . 6
5.2.2 Hazardous area classification and the role of HVAC. 8
5.2.3 Environmental conditions . 9
5.2.4 Natural/mechanical ventilation .12
5.2.5 Selection of controls philosophy .14
5.2.6 Operating and maintenance philosophy .17
5.2.7 Materials and corrosion .19
5.2.8 Design margins and calculations .20
5.2.9 Wind-tunnel and computational fluid dynamics modelling .21
5.2.10 Performance standards .26
5.3 System design — General .27
5.3.1 Natural ventilation .27
5.3.2 Mechanical ventilation .28
5.3.3 Secondary ventilation systems .30
5.3.4 Black start .31
5.4 Area-specific system design .31
5.4.1 Process and utility areas .31
5.4.2 Living quarters .32
5.4.3 Temporary refuge.35
5.4.4 Drilling and drilling utility areas .35
5.4.5 Gas turbine .37
5.4.6 Emergency plant ventilation .38
5.4.7 Battery and charger rooms .39
5.4.8 Laboratories .39
5.4.9 Purge air systems .40
5.4.10 Rooms protected by gaseous extinguishing agents .40
5.4.11 Engine-room ventilation .40
5.4.12 Watertight compartments .41
5.4.13 Air locks .41
5.4.14 Stairs and escape routes .41
5.5 Equipment and bulk selection .42
5.6 Installation and commissioning .42
5.7 Operation and maintenance .42
Annex A (normative) Equipment and bulk selection .43
Annex B (normative) Installation and commissioning .64
Annex C (informative) Operation and maintenance .69
Annex D (informative) Datasheets .72
Annex E (normative) Standard data for flanges.136
Bibliography .139
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries, SC 6, Processing equipment and
systems.
This third edition cancels and replaces the second edition (ISO 15138:2007), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— minimum and maximum temperatures have been added to 5.2.3.3.4 below Table 2 for clarification;
— a requirement for black start has been added to 5.3;
— requirements for the specific areas stairways/escape routes and air locks have been added to 5.4;
— phase-down and phase-out of high and medium global warming potential (GWP) refrigerants are
addressed in 5.4;
— a reference to new filtration standard and note for chemical filtration have been added to Table A.1;
— fail safe criteria for fire damper for safety critical areas have been added to Clause A.9;
— requirements for duct earthing have been added to B.1.1;
— the datasheet for DX cooling coil has been updated with electronic expansion valve;
— the datasheet for heating coils has been updated with data for self-generated noise.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 15138:2018(E)
Petroleum and natural gas industries — Offshore
production installations — Heating, ventilation and air-
conditioning
1 Scope
This document specifies requirements and provides guidance for the design, testing, installation and
commissioning of heating, ventilation, air-conditioning and pressurization systems, and equipment on
all offshore production installations for the petroleum and natural gas industries that are
— new or existing,
— normally occupied by personnel or not normally occupied by personnel, and
— fixed or floating but registered as an offshore production installation.
This document is normally applicable to the overall facilities. For installations that can be subject to
“Class” or “IMO/MODU Codes & Resolutions”, the user is referred to HVAC requirements under these
rules and resolutions. When these requirements are less stringent than those being considered for a
fixed installation, then it is necessary that this document, i.e. requirements for fixed installations, be
utilized.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 7235, Acoustics — Laboratory measurement procedures for ducted silencers and air-terminal units —
Insertion loss, flow noise and total pressure loss
ISO 8861, Shipbuilding — Engine-room ventilation in diesel-engined ships — Design requirements and basis
of calculations
ISO 12241, Thermal insulation for building equipment and industrial installations — Calculation rules
ISO 12499, Industrial fans — Mechanical safety of fans — Guarding
ISO 14694:2003, Industrial fans — Specifications for balance quality and vibration levels
ISO 21789, Gas turbine applications — Safety
IEC 60079-0, Electrical apparatus for explosive gas atmospheres — Part 0:
...