EN ISO 10439-1:2015
(Main)Petroleum, petrochemical and natural gas industries - Axial and centrifugal compressors and expander-compressors - Part 1: General requirements (ISO 10439-1:2015)
Petroleum, petrochemical and natural gas industries - Axial and centrifugal compressors and expander-compressors - Part 1: General requirements (ISO 10439-1:2015)
ISO 10439 specifies minimum requirements and gives recommendations for axial compressors, single-shaft, and integrally geared process centrifugal compressors, and expander-compressors for special purpose applications that handle gas or process air in the petroleum, petrochemical, and natural gas industries. ISO 10439-1:2015 specifies general requirements applicable to all such machines.
ISO 10439-1:2015 does not apply to fans (these are covered by API 673) or blowers that develop less than 34 kPa (5 psi) pressure rise above atmospheric pressure. It also does not apply to packaged, integrally geared centrifugal plant, and instrument air compressors, which are covered by API 672. Hot gas expanders over 300 °C (570 °F) are not covered by ISO 10439-1:2015.
ISO 10439-1:2015 contains information pertinent to all equipment covered by the other parts of ISO 10439. It shall be used in conjunction with the following parts of ISO 10439, as applicable to the specific equipment covered:
ISO 10439‑2;
ISO 10439‑3
ISO 10439‑4
Erdöl-, petrochemische und Erdgasindustrie - Axial- und Radialkompressoren und Expanderkompressoren - Teil 1: Allgemeine Anforderungen (ISO 10439-1:2015)
Industries du pétrole, de la pétrochimie et du gaz naturel - Compresseurs axiaux et centrifuges et compresseurs-détenteurs - Partie 1: Exigences générales (ISO 10439-1:2015)
L'ISO 10439 spécifie les exigences minimales et fournit des recommandations pour les compresseurs axiaux, les compresseurs centrifuges mono-arbres à multiplicateur intégré et les compresseurs-détendeurs pour applications spéciales de traitement des gaz et de l'air process dans les industries du pétrole, de la pétrochimie et du gaz naturel. L'ISO 10439-1:2015 spécifie les exigences générales applicables à ces machines.
L'ISO 10439-1:2015 ne s'applique ni aux ventilateurs (qui sont couverts par la norme API 673) ni aux compresseurs qui développent une élévation de pression inférieure à 34 kPa (5 psi) au-dessus de la pression atmosphérique. Elle ne s'applique pas non plus aux compresseurs d'air centrifuges assemblés à multiplicateur intégré des instruments et ateliers, qui sont couverts par la norme API 672. Les détendeurs de gaz chaud fonctionnant à plus de 300 °C (570 °F) ne sont pas couverts par l'ISO 10439-1:2015.
L'ISO 10439-1:2015 contient des informations pertinentes pour tous les équipements couverts par les autres parties de l'ISO 10439. Elle doit être utilisée conjointement avec les parties suivantes de l'ISO 10439, lorsqu'elles sont applicables à l'équipement spécifique couvert:
ISO 10439‑2;
ISO 10439‑3;
ISO 10439‑4.
Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina - Aksialni, radialni in ekspanzijski kompresorji - 1. del: Splošne zahteve (ISO 10439-1:2015)
Ta mednarodni standard določa minimalne zahteve in daje priporočila za aksialne kompresorje, radialne kompresorje z eno gredjo in vgrajenim gonilom ter ekspanzijske kompresorje za posebne namene, ki obdelujejo plin ali procesni zrak v petrokemični industriji ter industriji za predelavo nafte in zemeljskega plina. Ta del standarda ISO 10439 določa splošne zahteve, ki veljajo za vse take stroje.
Ta mednarodni standard ne velja za ventilatorje (ti so zajeti v API 673) ali puhala, ki razvijejo manj kot 34 kPa (5 psi) dviga tlaka nad atmosferskim tlakom. Ta mednarodni standard prav tako ne velja za vdelane stroje z vgrajenim gonilom in kompresorje instrumentalnega zraka, ki so zajeti v API 672. Ekspanderji vročega plina nad 300 °C (570 °F) niso zajeti v tem mednarodnem standardu.
Ta del standarda ISO 10439 vsebuje informacije, ki veljajo za vso opremo, za katero veljajo drugi deli standarda ISO 10439. Treba ga je uporabljati v povezavi z naslednjimi deli standarda ISO 10439, ki veljajo za posebno zajeto opremo:
– ISO 10439-2; – ISO 10439-3; – ISO 10439-4.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2015
1DGRPHãþD
SIST EN ISO 10439:2004
3HWURNHPLþQDLQGXVWULMDWHULQGXVWULMD]DSUHGHODYRQDIWHLQ]HPHOMVNHJDSOLQD
$NVLDOQLUDGLDOQLLQHNVSDQ]LMVNLNRPSUHVRUMLGHO6SORãQH]DKWHYH,62
Petroleum, petrochemical and natural gas industries - Axial and centrifugal compressors
and expander-compressors - Part 1: General requirements (ISO 10439-1:2015)
Erdöl-, petrochemische und Erdgasindustrie - Axial- und Radialkompressoren und
Expanderkompressoren für Sonderanwendungen zur Handhabung von Gas oder
Prozessluft - Teil 1: Allgemeine Anforderungen (ISO 10439-1:2015)
Industries du pétrole, de la pétrochimie et du gaz naturel - Compresseurs axiaux et
centrifuges et compresseurs-détenteurs - Partie 1: Exigences générales (ISO 10439-
1:2015)
Ta slovenski standard je istoveten z: EN ISO 10439-1:2015
ICS:
23.140 .RPSUHVRUMLLQSQHYPDWLþQL Compressors and pneumatic
VWURML machines
75.180.20 Predelovalna oprema Processing equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 10439-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2015
ICS 75.180.20; 71.120.99 Supersedes EN ISO 10439:2002
English Version
Petroleum, petrochemical and natural gas industries - Axial and
centrifugal compressors and expander-compressors - Part 1:
General requirements (ISO 10439-1:2015)
Industries du pétrole, de la pétrochimie et du gaz naturel - Erdöl-, petrochemische und Erdgasindustrie - Axial- und
Compresseurs axiaux et centrifuges et compresseurs- Radialkompressoren und Expanderkompressoren für
détenteurs - Partie 1: Exigences générales (ISO 10439- Sonderanwendungen zur Handhabung von Gas oder
1:2015) Prozessluft - Teil 1: Allgemeine Anforderungen (ISO 10439-
1:2015)
This European Standard was approved by CEN on 8 November 2014.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10439-1:2015 E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 10439-1:2015) has been prepared by Technical Committee ISO/TC 118
"Compressors and pneumatic tools, machines and equipment" 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 AFNOR.
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 August 2015, and conflicting national standards shall be withdrawn at
the latest by August 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10439:2002.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 10439-1:2015 has been approved by CEN as EN ISO 10439-1:2015 without any modification.
INTERNATIONAL ISO
STANDARD 10439-1
First edition
2015-02-15
Petroleum, petrochemical and natural
gas industries — Axial and centrifugal
compressors and expander-
compressors —
Part 1:
General requirements
Industries du pétrole, de la pétrochimie et du gaz naturel —
Compresseurs axiaux et centrifuges et compresseurs-détenteurs —
Partie 1: Exigences générales
Reference number
ISO 10439-1:2015(E)
©
ISO 2015
ISO 10439-1:2015(E)
© ISO 2015
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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved
ISO 10439-1:2015(E)
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, abbreviated terms and definitions . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 9
4 General .11
4.1 Dimensions and units .11
4.2 Statutory requirements .11
4.3 Unit responsibility .11
4.4 Basic design .11
4.4.1 General.11
4.4.2 Speed requirements .13
4.5 Materials .14
4.5.1 General.14
4.5.2 Castings .17
4.5.3 Forgings .18
4.5.4 Welding .19
4.6 Casings .19
4.6.1 Pressure-containing casings .19
4.6.2 Casing repairs and inspections .21
4.6.3 Material inspection of pressure-containing parts .22
4.6.4 Pressure casing connections .24
4.6.5 Casing support structures .26
4.6.6 External forces and moments .27
4.6.7 Guide vanes, stators, and stationary internals .27
4.7 Rotating elements.27
4.8 Dynamics .29
4.8.1 General.29
4.8.2 Lateral analysis .30
4.8.3 Unbalanced rotor response verification test .37
4.8.4 Additional testing .38
4.8.5 Level 1 stability analysis .39
4.8.6 Level II stability analysis .41
4.8.7 Torsional analysis .42
4.8.8 Vibration and balancing .44
4.9 Bearings and bearing housings.48
4.9.1 General.48
4.9.2 Hydrodynamic radial bearings .48
4.9.3 Hydrodynamic thrust bearings .48
4.9.4 Bearing housings .49
4.10 Shaft and seals .49
4.10.1 General.49
4.10.2 Clearance seals .50
4.10.3 Oil seals .51
4.10.4 Self-acting dry gas seal .51
4.11 Integral gearing .53
4.12 Nameplates and rotation arrows .53
5 Accessories .53
5.1 Drivers and gearing .53
5.2 Couplings and guards .54
ISO 10439-1:2015(E)
5.3 Lubrication and sealing systems .54
5.4 Mounting plates.55
5.4.1 General.55
5.4.2 Baseplates .58
5.4.3 Soleplates and sub-soleplates .60
5.5 Controls and instrumentation .61
5.5.1 General.61
5.5.2 Control systems .61
5.5.3 Instrument and control panels .62
5.5.4 Instrumentation .62
5.5.5 Alarms, shutdowns, and control systems .62
5.5.6 Electrical systems .62
5.5.7 Vibration, position, and bearing temperature detectors .62
5.6 Piping and appurtenances .62
5.6.1 General.62
5.6.2 Instrument piping .63
5.6.3 Process piping .63
5.7 Special tools .63
6 Inspection, testing, and preparation for shipment .63
6.1 General .63
6.2 Inspection .64
6.2.1 General.64
6.2.2 Material inspection .65
6.3 Testing .66
6.3.1 General.66
6.3.2 Hydrostatic test .66
6.3.3 Overspeed test .66
6.3.4 Dry gas seals .66
6.3.5 Mechanical running test .66
6.3.6 Assembled machine gas leakage test .68
6.3.7 Optional tests .68
6.4 Preparation for shipment .69
7 Supplier’s data .71
7.1 General .71
7.2 Proposals .72
7.2.1 General.72
7.2.2 Drawings .73
7.2.3 Technical data .73
7.2.4 Curves .74
7.2.5 Optional tests .75
7.3 Contract data .75
7.3.1 General.75
7.3.2 Curves and datasheets .75
7.3.3 Progress reports .76
7.3.4 Parts lists and recommended spares .76
7.3.5 Installation, operation, maintenance, and technical data manuals .76
Annex A (normative) Procedure for the determination of residual unbalance .78
Annex B (informative) Typical shaft end seals .88
Annex C (normative) Requirements for lateral analysis reports .97
Annex D (normative) Requirements for torsional analysis reports .105
Annex E (normative) Magnetic bearings .109
Annex F (normative) Dry gas seal testing at manufacturer’s shop .124
Annex G (informative) Guidelines for anti-surge systems .126
iv © ISO 2015 – All rights reserved
ISO 10439-1:2015(E)
Annex H (informative) Typical bid tab template .127
Bibliography .128
ISO 10439-1:2015(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 WTO principles in the Technical Barriers
to Trade (TBT), see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 118, Compressors and pneumatic tools, machines
and equipment, Subcommittee SC 1, Process compressors.
This first edition, together with ISO 10439-2, ISO 10439-3, and ISO 10439-4, cancels and replaces
ISO 10439:2002.
ISO 10439 consists of the following parts, under the general title Petroleum, petrochemical and natural
gas industries — Axial and centrifugal compressors and expander-compressors:
— Part 1: General requirements
— Part 2: Non-integrally geared centrifugal and axial compressors
— Part 3: Integrally geared centrifugal compressors
— Part 4: Expander-compressors
vi © ISO 2015 – All rights reserved
ISO 10439-1:2015(E)
Introduction
This International Standard is based on the 7th edition of the American Petroleum Institute standard API 617.
Users of this International Standard should be aware that further or differing requirements may be
needed for individual applications. This International Standard is not intended to inhibit a supplier
from offering, or the purchaser from accepting alternative equipment or engineering solutions for the
individual application. This may be particularly appropriate where there is innovative or developing
technology. Where an alternative is offered, the supplier should identify any variations from this
International Standard and provide details.
An asterisk (*) at the beginning of the paragraph of a clause or subclause indicates that either a decision is
required or further information is to be provided by the purchaser. This information should be indicated
on data sheets or stated in the enquiry or purchase order (see examples in ISO 10439-2:2015, Annex A,
ISO 10439-3:2015, Annex A, and ISO 10439-4:2015, Annex A).
This International Standard includes the following annexes:
— Annex A: Procedure for the determination of residual unbalance;
— Annex B: Typical shaft end seals;
— Annex C: Requirements for lateral analysis reports;
— Annex D: Requirements for torsional analysis reports;
— Annex E: Magnetic bearings;
— Annex F: Dry gas seal testing at manufacturer’s shop;
— Annex G: Guidelines for anti-surge systems;
— Annex H: Typical bid tab template.
Annex A, Annex C, Annex D, Annex E, and Annex F form a normative part of this part of ISO 10439.
Annex B, Annex G, and Annex H are for information only.
In this International Standard, where practical, US customary units are included in parentheses for
information.
INTERNATIONAL STANDARD ISO 10439-1:2015(E)
Petroleum, petrochemical and natural gas industries —
Axial and centrifugal compressors and expander-
compressors —
Part 1:
General requirements
1 Scope
This International Standard specifies minimum requirements and gives recommendations for axial
compressors, single-shaft, and integrally geared process centrifugal compressors, and expander-
compressors for special purpose applications that handle gas or process air in the petroleum,
petrochemical, and natural gas industries. This part of ISO 10439 specifies general requirements
applicable to all such machines.
This International Standard does not apply to fans (these are covered by API 673) or blowers that develop
less than 34 kPa (5 psi) pressure rise above atmospheric pressure. This International Standard also does
not apply to packaged, integrally geared centrifugal plant, and instrument air compressors, which are
covered by API 672. Hot gas expanders over 300 °C (570 °F) are not covered by this International Standard.
This part of ISO 10439 contains information pertinent to all equipment covered by the other parts of
ISO 10439. It shall be used in conjunction with the following parts of ISO 10439, as applicable to the
specific equipment covered:
— ISO 10439-2;
— ISO 10439-3;
— ISO 10439-4.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE Typical documents submitted as a user inquiry or order are user specifications, industry specifications,
(such as ISO and API specifications), data sheets, meeting notes, and supplemental agreements.
ISO 261, ISO general purpose metric screw threads — General plan
ISO 6708, Pipework components — Definition and selection of DN (nominal size)
ISO 7005-1, Pipe flanges — Part 1: Steel flanges for industrial and general service piping systems
ISO 7005-2, Metallic flanges — Part 2: Cast iron flanges
ISO 8068, Lubricants, industrial oils and related products (class L) — Family T (Turbines) — Specification
for lubricating oils for turbines
ISO 21940-32, Mechanical vibration — Rotor balancing — Part 32: Shaft and fitment key convention
ISO 10438 (all parts), Petroleum, petrochemical and natural gas industries — Lubrication, shaft-sealing
and control-oil systems and auxiliaries
ISO 10439-1:2015(E)
ISO 10441, Petroleum, petrochemical and natural gas industries — Flexible couplings for mechanical power
transmission — Special-purpose applications
ISO 14839-3, Mechanical vibration — Vibration of rotating machinery equipped with active magnetic
bearings — Part 3: Evaluation of stability margin
ISO 15156-3, Petroleum and natural gas industries — Materials for use in H2S-containing environments in
oil and gas production — Part 3: Cracking-resistant CRAs (corrosion-resistant alloys) and other alloys
IEC 60079-10-1, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas atmospheres
EN 55011, Industrial scientific and medical (ISM) radio-frequency equipment — Electromagnetic disturbance
characteristics — Limits and methods of measurement
EN 61000-6-2, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for
industrial environments
API 613, Special purpose gear units for petroleum, chemical, and gas industry services
ASME B1.1, Unified inch screw threads (UN and UNR thread form)
ASME B16.1, Grey iron pipe flanges and flanged fittings (Classes 25, 125, and 250)
ASME B16.11, Forged fittings, socket-welding and threaded
ASME B16.42, Ductile iron pipe flanges and flanged fittings (Classes 150 and 300)
ASME B16.47, Large diameter steel flanges NPS 26 through NPS 60 metric/inch standard
ASME B16.5, Pipe flanges and flanged fittings NPS ½ through NPS 24 metric/inch standard
ASME B1.20.1, Pipe threads, General purpose (Inch)
ASTM A247, Standard test method for evaluating the microstructure of graphite in iron castings
ASTM A395, Standard specification for ferritic ductile iron pressure-retaining castings for use at
elevated temperatures
ASTM E125, Standard reference photographs for magnetic particle indications on ferrous castings
ASTM E165, Standard practice for liquid penetrant examination for general industry
ASTM E709, Standard guide for magnetic particle testing
AWS D1.1, Structural welding code
NACE MR0103, Standard material requirements — Material resistant to sulfide stress cracking in corrosive
petroleum refining environments
NACE SP0472, Methods and controls to prevent in-service environmental cracking of carbon steel weldments
in corrosive petroleum refining environments
NFPA 70, National electrical code
SAE J518, Hydraulic flanged tube, pipe, and hose connections, four-bolt split flange type
3 Terms, abbreviated terms and definitions
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2 © ISO 2015 – All rights reserved
ISO 10439-1:2015(E)
3.1.1
anchor bolts
bolts used to attach the mounting plates to the support structure (concrete foundation or steel structure)
cf. hold-down bolts (3.1.11)
3.1.2
axially split joint
joint split with the principal face parallel to the shaft centreline
3.1.3
cartridge bundle assembly
assembly consisting of the complete compressor assembly minus the casing
Note 1 to entry: It includes the inner barrel assembly, end heads, seals, bearing housings, and bearings. It also
includes the rotor assembly. It is designed to be shop assembled, ready for insertion into the casing to minimize
installation work in the field.
3.1.4
certified point
point to which the performance tolerances shall be applied
Note 1 to entry: This is usually the normal operating point and suppliers will normally require that this point is
within their preferred selection range.
3.1.5
complex stiffness
notation for the total equivalent stiffness and damping expression, including the cross-coupled terms as
required for the hydrodynamic bearing or squeeze damper oil film
3.1.6
compliant seal
seal design that allows rotor or rotor sleeve contact and possible stator element penetration without
excessive loss of sealing performance
3.1.7
compressor rated point
intersection on the 100 % speed curve corresponding to the highest capacity of any specified operating point
3.1.8
compressor section
series of one or more impellers with defined external process conditions (i.e. side streams, bypassing,
or injection)
Note 1 to entry: This is generally a derived point rather than an actual operating point (see Figure 1 in
ISO 10439-2:2015 for a graphical representation).
3.1.9
critical speed
shaft rotational speed at which the rotor-bearing support system is in a state of resonance
3.1.10
design
manufacturers’ calculated parameter
Note 1 to entry: This is a term used by the equipment manufacturer to describe various parameters such as design
power, design pressure, design temperature, or design speed. It is not intended for the purchaser to use this term.
3.1.11
bull gear
gear wheel
lowest speed rotor in a gearbox cf. pinion(s) (3.1.34)
ISO 10439-1:2015(E)
3.1.12
gearing
pinion(s) and gear wheel combination(s)
Note 1 to entry: A gear mesh is a pinion and gear wheel that operates together. A gear wheel may mesh with more
than one pinion and, therefore, be part of more than one gear mesh.
3.1.13
hold-down bolts
bolts holding the equipment to the mounting plate cf. anchor bolts (3.1.1)
3.1.14
hydrodynamic bearings
bearings that use the principles of hydrodynamic lubrication
Note 1 to entry: The bearing surfaces are oriented so that relative motion forms an oil wedge, or wedges, to
support the load without shaft-to-bearing contact.
3.1.15
hysteresis damping
causes a phase difference between the stress and strain in any material under cyclic
loading; this phase difference produces the characteristic hysteric loop on a stress-strain diagram and,
thus, a potentially destabilizing damping force
3.1.16
inlet volumetric flow
flow rate expressed in volume flow units at the conditions of pressure, temperature, compressibility,
and gas composition, including moisture content, at the machine inlet flange
Note 1 to entry: Inlet volumetric flow is a specific example of actual volumetric flow. Actual volumetric flow is the
volume flow at any particular location such as interstage impeller inlet or discharge or machine inlet or discharge.
Actual volumetric flow should not be used interchangeably therefore with inlet volumetric flow.
3.1.17
inner barrel assembly
assembly consisting of the internal stationary parts that make up the removable portion
of the flowpath, including the inner barrel, the diaphragms, the impeller eye labyrinths, and the
diaphragm labyrinths
3.1.18
low temperature service
service where the specified minimum design metal temperature is below –29 °C (–20 °F)
3.1.19
maximum allowable temperature
maximum continuous temperature for which the manufacturer has designed the equipment (or any part
to which the term is referred)
Note 1 to entry: The maximum allowable temperature is usually set by material considerations.
3.1.20
maximum allowable working pressure
maximum continuous pressure for which the manufacturer has designed the equipment (or any part to
which the term is referred)
Note 1 to entry: Normally expected operating conditions can be based on settling-out pressure, maximum suction
pressure plus the maximum developed differential pressure at the maximum speed (trip speed) or may be limited
by relief valve set pressure or other means.
4 © ISO 2015 – All rights reserved
ISO 10439-1:2015(E)
3.1.21
maximum continuous speed
highest rotational speed (revolutions per minute) at which the machine, as-built and tested, is capable
of continuous operation
3.1.22
maximum inlet pressure
highest specified inlet pressure the equipment shall be subject to
3.1.23
maximum sealing pressure
highest pressure the seals are required to seal during any specified static or operating conditions and
during start-up and shutdown
3.1.24
minimum allowable speed
lowest speed (revolutions per minute) at which the manufacturer’s design shall permit continuous operation
3.1.25
minimum design metal temperature:
lowest mean metal temperature (through the thickness) expected, including operation upsets, auto
refrigeration, and temperature of the surrounding environment
3.1.26
modular rotor
rotor which is built up using stub shafts or similar devices and held together by one or more through bolts
3.1.27
moment simulator
auxiliary device intended to simulate the moment of the mass of a half coupling
Note 1 to entry: A moment simulator can also be designated to serve as an idling adapter (solo plate).
3.1.28
mounting plate(s)
device used to attach equipment to concrete foundations; this is either baseplate(s) or soleplates
3.1.29
normal operating point
point at which usual operation is expected and optimum efficiency is desired
Note 1 to entry: This point is usually the point at which the supplier certifies that performance is within the
tolerances stated in this part of ISO 10439.
3.1.30
normal speed
speed corresponding to the requirements of the normal operating condition
3.1.31
NPS
nominal pipe size
dimensionless value approximately equal to the diameter in inches
EXAMPLE NPS 3/4
Note 1 to entry: Adapted from ASME B 31.3–2002, 300.2.
Note 2 to entry: The number following the letters NPS does not represent a measurable value.
Note 3 to entry: NPS is a designation of pipe size only. The pipe end may be threaded or prepared for a welded fitting.
ISO 10439-1:2015(E)
3.1.32
observed
inspection or test where the purchaser is notified of the timing of the inspection
or test, and the inspection or test is performed as scheduled even if the purchaser or his representative
is not present
3.1.33
overload
highest flow point at which the predicted curve terminates on a speed line
3.1.34
pinion(s)
high-speed rotor(s) in a gearbox cf. bull gear (3.1.11)
3.1.35
PN
nominal pressure
numerical designation relating to pressure that is a convenient round number for reference purposes
EXAMPLE PN 100 [ISO 7268]
Note 1 to entry: The permissible working pressure associated with a PN designation depends upon the materials,
design, and working temperature and has to be selected from the pressure/temperature rating tables in
corresponding standards.
3.1.36
pressure casing
composite of all stationary pressure-containing parts of the unit, including all nozzl
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