ISO/TS 19883:2017
(Main)Safety of pressure swing adsorption systems for hydrogen separation and purification
Safety of pressure swing adsorption systems for hydrogen separation and purification
ISO/TS 19883:2017 identifies safety measures and applicable design features that are used in the design, commissioning, and operation of pressure swing adsorption systems for hydrogen separation and purification. It applies to hydrogen pressure swing adsorption systems that process all kinds of impure hydrogen streams as feed, including both stationary and skid-mounted pressure swing adsorption systems for hydrogen separation and purification in commercial or industrial use. This document also applies to small-scale PSA hydrogen system installed within containers, where allowed by local regulations.
Système d'adsorption modulée en pression pour la séparation et la purification de l'hydrogène
General Information
Standards Content (Sample)
TECHNICAL ISO/TS
SPECIFICATION 19883
First edition
2017-03
Safety of pressure swing adsorption
systems for hydrogen separation and
purification
Système d’adsorption modulée en pression pour la séparation et la
purification de l’hydrogène
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Basic specification . 3
4.1 Feed stream pressure . 3
4.2 Working temperature . 4
4.3 Assembly . 4
4.4 Material properties . 4
4.4.1 Feed stream pressure . 4
4.4.2 Working temperature . 4
5 Safety requirements of the PSA system . 4
5.1 General hazards associated with the PSA system . 4
5.1.1 General hazards associated with hydrogen gas . 4
5.1.2 General hazards associated with system leakage . 4
5.1.3 Hazards related to pressure . 4
5.1.4 Hazards related to ignition of hydrogen . 5
5.2 Safety specifications in the field . 5
5.2.1 General hazards . 5
5.2.2 Layout considerations . 5
5.2.3 Buildings and ventilation. 5
5.2.4 Explosion-proof area and explosion-proof grade . 6
5.2.5 Electrostatic grounding . . 7
5.2.6 Flammable and toxic gas detection alarm . 7
5.3 Safety specifications of equipment and piping . 8
5.3.1 General specification . 8
5.3.2 Safety specifications of adsorbers . 8
5.3.3 Safety specifications of the buffer tank . 9
5.3.4 Safety specifications of process control valves . 9
5.3.5 Safety specifications of piping . 9
5.3.6 Safety considerations for operations and maintenance .10
5.3.7 Safety specifications of inspection and test .10
5.3.8 Safety specifications of electrical equipment .11
5.3.9 Safety specifications of monitoring devices .12
Annex A (informative) Example of potential locations of relief valves .14
Bibliography .15
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 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 . i so .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 197, Hydrogen technologies.
iv © ISO 2017 – All rights reserved
TECHNICAL SPECIFICATION ISO/TS 19883:2017(E)
Safety of pressure swing adsorption systems for hydrogen
separation and purification
1 Scope
This document identifies safety measures and applicable design features that are used in the design,
commissioning, and operation of pressure swing adsorption systems for hydrogen separation and
purification. It applies to hydrogen pressure swing adsorption systems that process all kinds of impure
hydrogen streams as feed, including both stationary and skid-mounted pressure swing adsorption
systems for hydrogen separation and purification in commercial or industrial use. This document
also applies to small-scale PSA hydrogen system installed within containers, where allowed by local
regulations.
The scope of this document includes the equipment depicted within the dashed lines in Figure 1.
Figure 1 — Example of typical equipment in PSA system for hydrogen separation and
purification
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 4126-1, Safety devices for protection against excessive pressure — Part 1: Safety valves
ISO 11114-1, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 1:
Metallic materials
ISO 11114-2, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 2:
Non-metallic materials
ISO 11114-4, Transportable gas cylinders - Compatibility of cylinder and valve materials with gas
contents — Part 4: Test methods for selecting metallic materials resistant to hydrogen embrittlement
IEC 60079-0, Explosive atmospheres — Part 0: Equipment — General requirements
IEC 60079-10-1, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas atmospheres
IEC 60079-14, Explosive atmospheres — Part 14: Electrical installations design, selection and erection
IEC 60204-1, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60364-4, Low-voltage electrical installations — Part 4: Protection for safety
NFPA 56, Standard for Fire and Explosion Prevention during Cleaning and Purging of Flammable Gas
Piping Systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
pressure swing adsorption method
PSA method
gas separation method that takes advantage of the selective adsorption of a solid adsorbent (3.5) for
different gases and the ability of solid adsorbents to adsorb more impurities at high pressure and to
reject impurities at low pressure
Note 1 to entry: PSA, as practiced commercially, is a batch process utilizing multiple adsorbent-loaded vessels for
the continuous purification of a gas stream.
3.2
vacuum pressure swing adsorption
system for hydrogen separation and purification that relies on desorption at sub-atmospheric pressure
(achieved with vacuum pumps) to improve the performance of the system
3.3
pressure swing adsorption system for hydrogen separation and purification
hydrogen generation system that separates and purifies hydrogen from an impure hydrogen stream
through the pressure swing adsorption process
3.4
adsorber
vessel in which the adsorbent (3.5) used for hydrogen separation and purification is contained, which
can be vertical vessels
3.5
adsorbent
solid materials used to adsorb gas impurities from the impure hydrogen streams, thereby realizing the
separation of the hydrogen from the other gases
3.6
process control valves
operational devices that can open or close to regulate flow in response to a signal from the control
system (3.7)
3.7
control system
system that performs operations such as opening and closing process control valves (3.6), system
troubleshooting, product quality control, or optimization of process parameters
2 © ISO 2017 – All rights reserved
3.8
tail gas
gas remaining after the impure hydrogen mixture is purified through the PSA system
Note 1 to entry: Other names for tail gas are desorbed gas, purge gas, or off gas.
3.9
stationary PSA system for hydrogen separation and purification
PSA system in which all equipment and piping are permanently mounted to the equipment foundation(s)
and piping support structure
3.10
skid-mounted PSA system for hydrogen separation and purification
PSA system in which some or all of the equipment and piping are affixed to one or more skids, or
moveable bases
3.11
fire separation distance
distance between the PSA system and nearby buildings (3.15) that is required in order to prevent fire
from spreading from a PSA system to nearby buildings
3.12
buffer tank
vessel that receives the desorbed gas from the adsorbers (3.4) (PSA system) or from the vacuum pumps
(3.13) (VSA system) an
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.