SIST EN ISO 6368:2022

Petroleum, petrochemical and natural gas industries - Dry gas sealing systems for axial, centrifugal, and rotary screw compressors and expanders (ISO 6368:2021)

This document is applicable to dry gas sealing systems for axial, centrifugal, and rotary screw
compressors and expanders as described in ISO 10439 (all parts), ISO 10440-1 and ISO 10440-2.
Although intended for use primarily in oil refineries, it is also applicable to petrochemical facilities,
gas plants, liquefied natural gas (LNG) facilities and oil and gas production facilities. The information
provided is designed to aid in the selection of the system that is most appropriate for the risks and
circumstances involved in various installations.
This document does not apply to other types of shaft seals such as clearance seals, restrictive ring seals
or oil seals.
This document is a supplement to API Std 692, 1st edition (2018), the requirements of which are
applicable with the exceptions specified in this document.

Erdöl-, petrochemische und Erdgasindustrie - Trockene Gasdichtungssysteme für Axial-, Radial- und Schraubenverdichter und Expander (ISO 6368:2021)

Industries du pétrole, de la pétrochimie et du gaz naturel - Systèmes d'étanchéité au gaz pour les compresseurs axiaux, centrifuges, à vis et les turbodétendeurs (ISO 6368:2021)

Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina - Tesnilni sistemi s suhim plinom za aksialne, centrifugalne in rotacijske vijačne kompresorje in ekspanderje (ISO 6368:2021)

Ta dokument se uporablja za tesnilne sisteme s suhim plinom za aksialne, centrifugalne ter rotacijske vijačne kompresorje in ekspanderje, kot je opisano v standardih ISO 10439 (vsi deli), ISO 10440-1 in ISO 10440-2. Čeprav je prvotno namenjen uporabi v naftnih rafinerijah, se lahko uporablja tudi v petrokemičnih obratih, plinarnah, obratih z utekočinjenim zemeljskim plinom (LNG) in obratih za proizvajanje plina. Podane informacije so namenjene za pomoč pri izbiri sistema, ki je najprimernejši za tveganja in okoliščine v različnih namestitvah. Ta dokument se ne uporablja za druge vrste tesnil za gredi, kot so labirintna, omejevalna ali oljna tesnila. Ta dokument dopolnjuje standard API 692, prvo izdajo (2018), katerega zahteve se uporabljajo za izjeme, določene v tem dokumentu.

General Information

• Status: Published
• Public Enquiry End Date: 25-Jul-2021
• Publication Date: 22-Dec-2021
• ICS: 75.180.20 - Processing equipment
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 08-Dec-2021
• Due Date: 12-Feb-2022
• Completion Date: 23-Dec-2021
• Ref Project: EN ISO 6368:2021 - Petroleum, petrochemical and natural gas industries - Dry gas sealing systems for axial, centrifugal, and rotary screw compressors and expanders (ISO 6368:2021)

Relations

• Replaces: SIST EN ISO 10438-4:2008 - Petroleum, petrochemical and natural gas industries - Lubrication, shaft-sealing and control-oil systems and auxiliaries - Part 4: Self-acting gas seal support systems (ISO 10438-4:2007)
• Effective Date: 08-Dec-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 6368:2022
01-februar-2022
Nadomešča:
SIST EN ISO 10438-4:2008
Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina -
Tesnilni sistemi s suhim plinom za aksialne, centrifugalne in rotacijske vijačne
kompresorje in ekspanderje (ISO 6368:2021)
Petroleum, petrochemical and natural gas industries - Dry gas sealing systems for axial,
centrifugal, and rotary screw compressors and expanders (ISO 6368:2021)
Erdöl-, petrochemische und Erdgasindustrie - Trockene Gasdichtungssysteme für Axial-,
Radial- und Schraubenverdichter und Expander (ISO 6368:2021)
Industries du pétrole, de la pétrochimie et du gaz naturel - Systèmes d'étanchéité au gaz
pour les compresseurs axiaux, centrifuges, à vis et les turbodétendeurs (ISO 6368:2021)
Ta slovenski standard je istoveten z: EN ISO 6368:2021
ICS:
75.180.20 Predelovalna oprema Processing equipment
SIST EN ISO 6368:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 6368:2022

---------------------- Page: 2 ----------------------
SIST EN ISO 6368:2022


EN ISO 6368
EUROPEAN STANDARD

NORME EUROPÉENNE

December 2021
EUROPÄISCHE NORM
ICS 75.180.20 Supersedes EN ISO 10438-4:2007
English Version

Petroleum, petrochemical and natural gas industries - Dry
gas sealing systems for axial, centrifugal, and rotary screw
compressors and expanders (ISO 6368:2021)
Industries du pétrole, de la pétrochimie et du gaz Erdöl-, petrochemische und Erdgasindustrie -
naturel - Systèmes d'étanchéité au gaz pour les Trockene Gasdichtungssysteme für Axial-, Radial- und
compresseurs axiaux, centrifuges, à vis et les Schraubenverdichter und Expander (ISO 6368:2021)
turbodétendeurs (ISO 6368:2021)
This European Standard was approved by CEN on 5 November 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6368:2021 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
SIST EN ISO 6368:2022
EN ISO 6368:2021 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------
SIST EN ISO 6368:2022
EN ISO 6368:2021 (E)
European foreword
This document (EN ISO 6368:2021) has been prepared by Technical Committee ISO/TC 67 "Materials,
equipment and offshore structures for petroleum, petrochemical and natural gas industries" in
collaboration with Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for
petroleum, petrochemical and natural gas industries” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2022, and conflicting national standards shall be
withdrawn at the latest by June 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10438-4:2007.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 6368:2021 has been approved by CEN as EN ISO 6368:2021 without any modification.

3

---------------------- Page: 5 ----------------------
SIST EN ISO 6368:2022

---------------------- Page: 6 ----------------------
SIST EN ISO 6368:2022
INTERNATIONAL ISO
STANDARD 6368
First edition
2021-11
Petroleum, petrochemical and
natural gas industries — Dry gas
sealing systems for axial, centrifugal,
and rotary screw compressors and
expanders
Industries du pétrole, de la pétrochimie et du gaz naturel — Systèmes
d'étanchéité au gaz pour les compresseurs axiaux, centrifuges, à vis et
les turbodétendeurs
Reference number
ISO 6368:2021(E)
© ISO 2021

---------------------- Page: 7 ----------------------
SIST EN ISO 6368:2022
ISO 6368:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2021 – All rights reserved

---------------------- Page: 8 ----------------------
SIST EN ISO 6368:2022
ISO 6368:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
st
4 Supplements to API 692, 1 edition (2018) . 2
4.1 General requirements . 2
4.2 Sleeves, retainers, housings, disk, and carrier — Metals . 2
4.3 Module DD3 — Double seal gas differential pressure control . 2
4.4 Cooler . 2
4.5 Pressure-relieving devices . 3
4.6 Materials . 3
4.7 Valves . 3
4.8 System diagrams . 4
4.9 Applicable standards . 4
Bibliography . 5
iii
© ISO 2021 – All rights reserved

---------------------- Page: 9 ----------------------
SIST EN ISO 6368:2022
ISO 6368:2021(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.
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 developm
...

SLOVENSKI STANDARD
oSIST prEN ISO 6368:2021
01-julij-2021
Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina -
Tesnilni sistemi s suhim plinom za aksialne, centrifugalne in rotacijske vijačne
kompresorje in ekspanderje (ISO/DIS 6368:2021)
Petroleum, petrochemical and natural gas industries - Dry gas sealing systems for axial,
centrifugal, and rotary screw compressors and expanders (ISO/DIS 6368:2021)
Erdöl-, petrochemische und Erdgasindustrie - Trockene Gasdichtungssysteme für Axial-,
Radial- und Schraubenverdichter und Expander (ISO/DIS 6368:2021)
Industries du pétrole et du gaz naturel - Systèmes d'étanchéité au gaz pour les
compresseurs axiaux, centrifuges, à vis et les turbodétendeurs (ISO/DIS 6368:2021)
Ta slovenski standard je istoveten z: prEN ISO 6368
ICS:
75.180.20 Predelovalna oprema Processing equipment
oSIST prEN ISO 6368:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 6368:2021

---------------------- Page: 2 ----------------------
oSIST prEN ISO 6368:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 6368
ISO/TC 67/SC 6 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2021-05-03 2021-07-26
Petroleum, petrochemical and natural gas industries —
Dry gas sealing systems for axial, centrifugal, and rotary
screw compressors and expanders
Industries du pétrole et du gaz naturel — Systèmes d'étanchéité au gaz pour les compresseurs axiaux,
centrifuges, à vis et les turbodétendeurs
ICS: 75.180.20
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 6368:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021

---------------------- Page: 3 ----------------------
oSIST prEN ISO 6368:2021
ISO/DIS 6368:2021(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 6368:2021
ISO/DIS 6368:2021(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
st
4 Supplements to API 692, 1 edition (2018) . 2
4.1 General requirements . 2
4.2 Requirements for dry gas seals . 2
4.3 Sleeves, retainers, housings, disk, and carrier — Metals . 2
4.4 Module DD3 — Double seal gas differential pressure control. 2
4.5 Cooler . 3
4.6 Pressure-relieving devices . 3
4.7 Materials . 3
4.8 Valves . 3
4.9 System diagrams . 4
4.10 Applicable standards . 4
© ISO 2021 – All rights reserved iii

---------------------- Page: 5 ----------------------
oSIST prEN ISO 6368:2021
ISO/DIS 6368:2021(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.
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 .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, Subcommittee SC 6, Processing
equipment and system.
This document cancels and replaces the second edition of ISO 10438-4:2007, which has been technically
revised.
st
This document supplements API Std 692, 1 edition (2018).
The technical requirements of ISO 10438-4 and API Std 614 Part 4 used to be identical. In the meantime
st
API Std 614 Part 4 has been technically revised and published as API Std 692, 1 edition (2018). The
purpose of this document is to bring it up to date, by referencing the current edition of API Std 692 and
including supplementary content.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

---------------------- Page: 6 ----------------------
oSIST prEN ISO 6368:2021
ISO/DIS 6368:2021(E)

Introduction
Users of this document are informed that further or differing requirements can be neede
...