SIST EN ISO 10442:2004
(Main)Petroleum, chemical and gas service industries - Packaged, integrally geared centrifugal air compressors (ISO 10442:2002)
Petroleum, chemical and gas service industries - Packaged, integrally geared centrifugal air compressors (ISO 10442:2002)
ISO 10442:2002 specifies requirements and gives recommendations for the design, materials, fabrication, inspection, testing and preparation for shipment of constant-speed, packaged, integrally geared centrifugal air compressors, including their accessories, for use in the petroleum, chemical and gas service industries. It is also applicable to gas services other than air that are non-hazardous and non-toxic. It is not applicable to machines that develop a pressure rise of less than 35 kPa above atmospheric pressure, which are classed as fans or blowers.
Erdöl-, Chemie- und Erdgasindustrie - Turbo-Luftkompressoranlagen mit integriertem Getriebe (ISO 10442:2002)
Industries du pétrole, de la chimie et du gaz naturel - Compresseurs d'air centrifuges assemblés a multiplicateur intégré (ISO 10442:2002)
L'ISO 10442:2002 spécifie les exigences et fournit des recommandations pour la conception, les matériaux, la fabrication, le contrôle, la mise à l'essai et la préparation pour l'expédition des compresseurs d'air centrifuges à multiplicateur intégré assemblé à vitesse constante, y compris leurs accessoires, utilisés dans les industries du pétrole, de la chimie et du gaz naturel. Elle peut s'appliquer aux utilisations de gaz autres que l'air, non dangereux et non toxiques. Cette norme ne s'applique pas aux machines qui développent une élévation de pression inférieure à 35 kPa au-dessus de la pression atmosphérique, classées comme ventilateurs ou compresseurs.
Petroleum, chemical and gas service industries - Packaged, integrally geared centrifugal air compressors (ISO 10442:2002)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2004
Petroleum, chemical and gas service industries - Packaged, integrally geared
centrifugal air compressors (ISO 10442:2002)
Petroleum, chemical and gas service industries - Packaged, integrally geared centrifugal
air compressors (ISO 10442:2002)
Erdöl-, Chemie- und Erdgasindustrie - Turbo-Luftkompressoranlagen mit integriertem
Getriebe (ISO 10442:2002)
Industries du pétrole, de la chimie et du gaz naturel - Compresseurs d'air centrifuges
assemblés a multiplicateur intégré (ISO 10442:2002)
Ta slovenski standard je istoveten z: EN ISO 10442:2002
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 10442
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2002
ICS 23.140; 75.180.20
English version
Petroleum, chemical and gas service industries - Packaged,
integrally geared centrifugal air compressors (ISO 10442:2002)
Industries du pétrole, de la chimie et du gaz naturel -
Compresseurs d'air centrifuges assemblés à multiplicateur
intégré (ISO 10442:2002)
This European Standard was approved by CEN on 6 November 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10442:2002 E
worldwide for CEN national Members.
Foreword
This document (EN ISO 10442:2002) has been prepared by Technical Committee ISO/TC 118
"Compressors, pneumatic tools and pneumatic machines" in collaboration with Technical
Committee CEN/TC 12 "Materials, equipment and offshore structures for petroleum 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 June 2003, and conflicting national
standards shall be withdrawn at the latest by June 2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
NOTE FROM CMC The foreword is susceptible to be amended on reception of the German
language version. The confirmed or amended foreword, and when appropriate, the normative
annex ZA for the references to international publications with their relevant European
publications will be circulated with the German version.
Endorsement notice
The text of ISO 10442:2002 has been approved by CEN as EN ISO 10442:2002 without any
modifications.
INTERNATIONAL ISO
STANDARD 10442
First edition
2002-12-01
Petroleum, chemical and gas service
industries — Packaged, integrally geared
centrifugal air compressors
Industries du pétrole, de la chimie et du gaz naturel — Compresseurs d'air
centrifuges assemblés à multiplicateur intégré
Reference number
ISO 10442:2002(E)
©
ISO 2002
ISO 10442:2002(E)
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ii © ISO 2002 – All rights reserved
ISO 10442:2002(E)
Contents
Foreword . iv
Introduction. v
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 2
4 Basic design . 4
4.1 General . 4
4.2 Package. 7
4.3 Integrally geared compressor. 19
4.4 Driver . 33
4.5 Driver-to-compressor coupling and guard. 34
4.6 Intercoolers. 35
5 Accessories . 35
5.1 Aftercooler . 35
5.2 Air intake filter-silencer . 36
5.3 Discharge blowoff silencer . 36
6 Inspection, testing and preparation for shipment . 36
6.1 General . 36
6.2 Inspection . 37
6.3 Testing. 37
6.4 Preparation for shipment. 40
7 Vendor data. 41
7.1 Proposals . 41
7.2 Contract data . 42
Annex A (informative) Data sheets . 46
Annex B (informative) Material specifications for major component parts. 59
Annex C (informative) Diagrams (see ISO 10439). 62
Annex D (normative) Forces and moments . 66
Bibliography. 69
ISO 10442:2002(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
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 International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10442 was prepared by Technical Committee ISO/TC 118, Compressors, pneumatic tools and pneumatic
machines, in collaboration with Technical Committee ISO/TC 67, Materials, equipment and offshore structures for
petroleum, petrochemical and natural gas industries, Subcommittee SC 6, Processing equipment and systems.
Annex D forms a normative part of this International Standard. Annexes A, B and C are for information only.
iv © ISO 2002 – All rights reserved
ISO 10442:2002(E)
Introduction
This International Standard is based on the American Petroleum Institute's API Std 672, second edition, April 1988.
Some of the content of this International Standard is identical or similar to ISO 10439, which covers centrifugal
compressors for the petroleum, chemical and gas service industries.
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 vendor from offering, or the purchaser
from accepting, alternative equipment or engineering solutions for the individual application. This may be
particularly applicable where there is innovative or developing technology. Where an alternative is offered, the
vendor should identify any variations from this International Standard and provide details.
INTERNATIONAL STANDARD ISO 10442:2002(E)
Petroleum, chemical and gas service industries — Packaged,
integrally geared centrifugal air compressors
1 Scope
This International Standard specifies requirements and gives recommendations for the design, materials,
fabrication, inspection, testing and preparation for shipment of constant-speed, packaged, integrally geared
centrifugal air compressors, including their accessories, for use in the petroleum, chemical and gas service
industries. It is also applicable to gas services other than air that are non-hazardous and non-toxic. It is not
applicable to machines that develop a pressure rise of less than 35 kPa above atmospheric pressure, which are
classed as fans or blowers.
NOTE In this International Standard, where practical, US customary units have been included in brackets for information.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 261, ISO general-purpose metric screw threads — General plan
ISO 262, ISO general-purpose metric screw threads — Selected sizes for screws, bolts and nuts
ISO 724, ISO general-purpose metric screw threads — Basic dimensions
ISO 965 (all parts), ISO general purpose metric screw threads — Tolerances
ISO 3511-1, Process measurement control functions and instrumentation — Symbolic representation — Part 1:
Basic requirements
ISO 3744, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Engineering method in an essentially free field over a reflecting plane
ISO 5389, Turbocompressors — Performance test code
ISO 7005-2, Metallic flanges — Part 2: Cast iron flanges
ISO 9614 (both parts), Acoustics — Determination of sound power levels of noise sources using sound intensity
ISO 10436, Petroleum and natural gas industries — General-purpose steam turbines for refinery service
ISO 10438, (all parts), Petroleum and natural gas industries — Lubrication, shaft-sealing and control-oil systems
and auxiliaries
ISO 10441, Petroleum and natural gas industries — Flexible couplings for mechanical power transmission —
Special purpose applications
ISO 10442:2002(E)
IEC 60079-10, Electrical apparatus for explosive gas atmospheres — Part 10, Classification of hazardous areas
1)
ABMA Std 7, Shaft and housing fits for metric radial ball and roller bearings (except tapered roller bearings)
conforming to basic boundary plan
ABMA Std 20, Radial bearings of ball, cylindrical roller and spherical roller types — Metric design
2)
AGMA 2000, Gear classification and inspection handbook
AGMA 6011, Specification for High Speed Helical Gear Units
API Std 670, Vibration, axial position, and bearing temperature monitoring systems
API RP 520 PT I, Sizing, selection, and installation of pressure-relieving devices in refineries, Part I, Sizing and
selection
API RP 520 PT II, Sizing, selection, and installation of pressure-relieving devices in refineries, Part II, Installation
3)
ASME PTC 10, Performance test code on compressors and exhausters
4)
ASTM A275, Standard test method for magnetic particle examination of steel forgings
5)
DIN 3990, Load calculations for gearings
6)
NEMA SM 23, Steam turbines for mechanical drive service
7)
TEMA Standards of the Tubular Exchanger Manufacturers Association, eight edition
3 Terms and definitions
For the purposes of this International Standard the following terms and definitions apply.
3.1
bull gear
low-speed rotor of the integral gear
3.2
inlet volume flow
volume flow rate determined at the conditions of pressure, temperature, compressibility and gas composition,
including moisture, at the compressor inlet flange
[ISO 10439:2002, definition 3.5]
1) American Bearing Manufacturers Association, 2025 M Street, NW. Suite 800, Washington, DC 20036, USA.
2) American Gear Manufacturers Association, 1500 King St, Suite 201, Alexandria VA 22314, USA.
3) American Society of Mechanical Engineers, 345 East 47th Street, New York, NY 10017-2392, USA.
4) American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-11887, USA.
5) Deutsches Institut für Normung E.V., Beuth Verlag GmbH, Burggrafenstrasse 6, D10787, Berlin, Germany.
6) US National Electrical Manufacturers Association, 1300 North 17th Street, Suite 1847, Rosslyn, Virginia 22209, USA.
7) US Tubular Exchanger Manufacturers Association, 25 N Broadway, Tarrytown, New York, NY 10007, USA.
2 © ISO 2002 – All rights reserved
ISO 10442:2002(E)
3.3
maximum allowable temperature
maximum continuous temperature for which the manufacturer has designed the equipment (or any part to which
the term is referred) when handling the specified fluid at the specified pressure
[ISO 10439:2002, definition 3.6]
3.4
maximum allowable working pressure
maximum continuous pressure for which the manufacturer has designed the equipment (or any part to which the
term is referred) when operating at the maximum allowable temperature
[ISO 10439:2002, definition 3.7]
3.5
normal operating point
point at which usual operation is expected and optimum efficiency is desired
NOTE This will usually be the point at which the vendor certifies that performance is within the tolerances stated in this
International Standard.
[ISO 10439:2002, definition 3.11]
3.6
pinion
high-speed rotor, or rotors, of the integral gear
3.7
piping design code
recognized piping standard specified or agreed by the purchaser
EXAMPLE ASME B31.3.
3.8
pressure casing
composite of all the stationary pressure-containing parts of the unit
3.9
pressure design code
recognized pressure vessel standard specified or agreed by the purchaser
EXAMPLE ASME Boiler and Pressure Vessel Code, Section VIII.
[ISO 10439:2002, definition 3.14]
3.10
rated discharge pressure
highest pressure required to meet the specified operating conditions
3.11
rated operating point
operating point at which the rated volume flow and the rated discharge pressure are attained
3.12
rated operating speed
speed required to meet the conditions specified by the purchaser for the intended service
NOTE This speed is equal to the maximum continuous speed for constant speed compressor units.
ISO 10442:2002(E)
3.13
rated volume flow
inlet volume flow required by the specified operating conditions
3.14
standby service
service condition in which a normally idle or idling piece of equipment is capable of immediate automatic or manual
start-up and continuous operation
3.15
trip speed
speed at which the independent emergency overspeed device operates to shut down a prime mover
NOTE For constant speed motor drivers, this is the speed corresponding to the synchronous speed of the motor at the
maximum frequency of the electrical supply.
[ISO 10439:2002, definition 3.19]
4 Basic design
4.1 General
4.1.1 Purchaser decision or information
A bullet (�) at the beginning of a clause indicates that the purchaser is required to make a decision or provide
information. This information should be indicated on the data sheets (see annex A).
4.1.2 Packaged equipment
The vendor shall provide, as a minimum, the following equipment (referred to herein as a package), packaged to
meet the specified operating conditions:
a) centrifugal compressor with integral speed-increasing gear unit;
b) intercoolers, moisture separators and V-notched gate drain valves;
c) inlet throttle device (valve or variable-inlet guide vanes);
d) driver (motor or turbine as specified);
e) couplings and guards;
f) “lube”-oil system;
g) vibration monitoring system;
h) controls and instrumentation;
i) instrument and control panel;
j) common baseplate.
If requested by the purchaser, the layout of the package shall be agreed by the purchaser.
4 © ISO 2002 – All rights reserved
ISO 10442:2002(E)
4.1.3 Shipped loose equipment
The vendor shall provide the following accessory equipment, either packaged or included within the scope of
supply and shipped loose, to meet the specified operating conditions:
a) aftercooler with moisture separator and V-notched gate drain valve;
b) discharge check valve;
c) discharge blowoff or by-pass valve;
d) air inlet filter-silencer;
e) blowoff or by-pass silencer.
4.1.4 Other equipment
� Any other equipment required shall be specified by the purchaser and included in the vendor's proposal.
4.1.5 Standby service
If standby service is specified, the vendor shall provide all necessary controls and protective systems to allow
automatic or manual start-up.
4.1.6 Turbine-driven equipment
All turbine-driven equipment shall be designed to run without damage to the trip speed of the driver.
4.1.7 Normal operating point
� The purchaser shall specify the normal operating point on the data sheets.
4.1.8 Environmental conditions
� The purchaser shall specify whether the installation is indoors (heated or unheated) or outdoors (with or without a
roof), as well as the weather and environmental conditions in which the package must operate (including maximum
and minimum temperatures and unusual humidity or dust problems). The package and its accessories shall be
suitable for operation under these specified conditions. For the purchaser's guidance, the vendor shall list in the
proposal any special protection that the purchaser is required to supply.
4.1.9 Engineering coordination
The vendor shall assume responsibility for the engineering coordination of the package and all accessories
included in the scope of the order.
4.1.10 Package arrangement
The arrangement of the package, including piping, coolers, pumps and controls, shall provide adequate clearance
areas and safe access for operation and maintenance.
4.1.11 Oil reservoirs and housings
Oil reservoirs and compressor housings that enclose moving lubricated parts (such as bearings, shaft seals, highly
polished parts, instruments and control elements) shall be designed to minimize contamination by moisture, dust
and other foreign matter during periods of operation and idleness.
ISO 10442:2002(E)
4.1.12 Motors and electrical components
� Motors and all other electrical components and installations shall be suitable for the area classification (zone)
specified by the purchaser on the data sheets (see annex A), shall meet the requirements of IEC 60079-10 and
shall comply with applicable local codes and regulations specified by the purchaser.
4.1.13 External parts
External parts that are subject to rotary or sliding motions (such as control linkage joints and adjusting
mechanisms) shall be of corrosion-resistant materials suitable for the site environment and shall be of sufficient
hardness to resist wear.
4.1.14 Service life
The equipment (including auxiliaries) covered by this International Standard shall be designed and constructed for
a minimum service life of twenty years and at least three years of uninterrupted operation.
4.1.15 Performance criteria
The package shall perform on the test stand and on its permanent foundation within the specified acceptance
criteria. After installation, the performance of the package shall be the joint responsibility of the purchaser and the
vendor having package responsibility.
4.1.16 Sound pressure level
Control of the sound pressure level (SPL) of all equipment furnished shall be a joint effort of the purchaser and the
vendor. The equipment furnished by the vendor shall conform to the maximum allowable sound pressure level
specified by the purchaser.
4.1.17 Pressure design code
� The pressure design code shall be specified or agreed by the purchaser.
Pressure components shall comply with the pressure design code as well as the requirements of this International
Standard.
4.1.18 Heat exchangers
4.1.18.1 Cooling water systems, if required, shall be designed for the conditions specified in Table 1 unless
otherwise specified. Provision shall be made for complete venting and draining of the system.
The vendor shall notify the purchaser if the criteria for minimum temperature rise and velocity over heat exchange
surfaces result in a conflict. The criterion for velocity overheat exchange surfaces is intended to minimize the use of
cooling water. The purchaser shall approve the final selection.
4.1.18.2 The coolers shall be of a water-cooled, shell-and-tube type, or a suitable air-cooled type, as specified.
A removable-bundle design is required for coolers with more than 0,50 m of surface, unless otherwise specified.
Removable-bundle coolers shall be in accordance with TEMA Class C unless otherwise specified, and shall be
constructed with a removable channel cover. Tubes shall not have an outside diameter of less than 16 mm (5/8 in),
and the tube wall shall not have a thickness of less than 1,25 mm (0,05 in). Unless otherwise specified, cooler
shells, channels and covers shall be of steel, tube sheets shall be of brass, and tubes shall be of inhibited
admiralty. U-bend tubes are not permitted. Each cooler shall be sized to accommodate the total cooling load.
6 © ISO 2002 – All rights reserved
ISO 10442:2002(E)
Table 1 — Cooling water systems — Design requirements
Velocity over heat exchange surfaces 1,5 m/s to 2,5 m/s (5 ft/s to 8 ft/s)
Maximum allowable gauge working pressure W 500 kPa (75 psi)
Test gauge pressure W 750 kPa (110 psi)
Maximum inlet temperature 30 °C (90 °F)
Maximum temperature rise 20 K (35 °F)
2 2
Fouling factor on water side 0,35 m ·K/kW (0,002 h·ft ·°F/Btu)
Maximum pressure drop 100 kPa (15 psi)
Maximum outlet temperature 50 °C (120 °F)
Minimum temperature rise 10 K (20 °F)
Shell corrosion allowance 3,0 mm (⅛ in)
4.1.18.3 The package shall provide complete venting and draining of the cooling system. This shall include vent
and drain connections on both the air/oil and water sides.
4.1.18.4 The vendor shall include in the proposal complete details of any proposed air-cooled cooler.
4.1.19 Special tools and fixtures
4.1.19.1 If special tools and fixtures are required to disassemble, assemble or maintain the unit, they shall be
included in the quotation and furnished as part of the initial supply of the package. For multi-unit installations, the
requirements for quantities of special tools and fixtures shall be mutually agreed upon by the purchaser and the
vendor. These or similar special tools shall be used during shop assembly and post-test disassembly of the
equipment.
4.1.19.2 If special tools are provided, they shall be packaged in separate, rugged boxes and marked “special
tools for (tag/item number)”. Each tool shall be stamped or tagged to indicate its intended use.
4.1.20 Preliminary review
Many factors (such as piping loads, alignment at operating conditions, supporting structure, handling during
shipment, and handling and assembly at the site) may adversely affect site performance. To minimize the influence
of these factors, the vendor shall review and comment on the purchaser's piping and foundation drawings, and the
vendor's representative shall observe a check of the piping performed by parting the flanges. If specified, the
vendor's representative shall be present during the initial alignment check and shall check alignment at the
operating temperature.
4.1.21 Spare parts
Spare parts for the compressor and all furnished auxiliaries shall meet all the criteria of this International Standard.
4.1.22 Regulations
� The purchaser and the vendor shall agree on the measures to be taken for compliance with governmental
regulations, ordinances or rules that are applicable to the equipment.
4.2 Package
4.2.1 Lubrication — General
4.2.1.1 Unless otherwise specified, bearings and bearing housings shall be arranged for hydrocarbon oil
lubrication.
ISO 10442:2002(E)
4.2.1.2 A pressurized oil system shall be furnished to supply oil at a suitable pressure or pressures, as
applicable, to the following:
a) the bearings of the integrally geared compressor;
b) the spray nozzles for the gear teeth;
c) the bearings of the driver, if specified.
4.2.1.3 If oil is supplied from a common system to two or more machines (such as a compressor, a gear and a
motor), the oil's characteristics shall be specified on the data sheets (see annex A) by the purchaser on the basis of
mutual agreement with all vendors supplying equipment served by the common oil system.
Unless otherwise specified, pressurized oil systems shall conform to the requirement of ISO 10438.
4.2.2 Pressure lubrication systems
4.2.2.1 The pressure lubrication system shall consist of main and standby positive displacement oil pumps, a
supply-and-return system, oil cooler twin full-flow filters and instruments (see Figure 1). The filter assembly shall
include a continuous-flow two-way switch valve(s). The requirements of 4.2.2.2 to 4.2.2.10 shall apply.
Unless otherwise specified, oil-containing pressure components shall be steel.
4.2.2.2 The main oil pump shall be driven in accordance with the data sheets (see annex A). The standby
pump shall be separately driven and automatically controlled. Both pumps shall be full capacity. The required pump
shaft power shall not exceed the driver nameplate rating, with the pump delivering lubricating oil at the relief valve
set pressure and with the oil at the maximum viscosity expected at the vendor's minimum allowable oil
temperature. This temperature shall be stated in the vendor's proposal. Oil pumps shall be sized so that they can
each deliver the required capacity when pumping lubricating oil at the highest temperature and corresponding
minimum viscosity.
4.2.2.3 Individual external relief valves shall be provided for each positive displacement pump. These valves
shall function only to protect the pumps from over pressure. Relief valves for all operating equipment shall meet the
limiting relief valve requirements defined in API RP 520, Parts I and II, or local regulation. Relief valves shall be set
to operate at not more than the maximum allowable working pressure, but not less than 110 % of the rated
pressure or the rated pressure plus 170 kPa (25 psi), whichever is the greater. The vendor shall determine the
sizes and set pressures of all relief valves related to the equipment.
4.2.2.4 A separate, direct-acting back-pressure control valve with manual bypass shall be provided and sized
to maintain system pressure even when both pumps are operating.
� 4.2.2.5 An oil cooler shall be provided to maintain the oil supply temperature at or below 50 °C (120 °F). A
removable-bundle design is required for coolers with more than 0,50 m of surface, unless otherwise specified.
Removable-bundle coolers shall be in accordance with TEMA Class C, unless otherwise specified and shall be
constructed with a removable channel cover. To prevent the oil from being contaminated if the cooler fails, the oil-
side operating pressure shall be higher than the water-side operating pressure. Coolers shall be equipped with vent
and drain connections on their oil and water sides. Internal oil coolers are not permitted. Each cooler may require to
be equipped with an automatic oil-side bypass for regulation of the oil temperature.
� 4.2.2.6 Full-flow filters with replaceable elements and filtration of 10 µm (400 micro-inch) nominal or finer shall
be supplied. The filters shall be located downstream of the coolers. The filter cases and heads shall be suitable for
operation at a pressure of not less than the relief valve setting. Filters that have covers with a mass of more than
16 kg (35 lb) shall have cover lifters (see 4.1.22). Filters shall not be equipped with a relief valve or an automatic
bypass. Filter cartridge materials shall be corrosion-resistant. Metal-mesh or sintered-metal filter elements are not
permissible. Stacked filter cartridge designs are not permitted. The pressure drop for clean filter elements shall not
exceed 15 % of the total allowable dirty pressure drop, or 34 kPa (5 psi) at an operating temperature of 38 °C
(100 °F) and normal flow. Cartridges shall have a minimum collapsing differential pressure of 500 kPa (75 psi). The
filters shall be equipped with a vent and clean-and-dirty drain connections.
8 © ISO 2002 – All rights reserved
ISO 10442:2002(E)
If a specific filter element is desired, the purchaser shall specify the make and model number of the element.
NOTE Particle size implies the diameter of a spherical bead: thus, a 10 µm (400 micro-inch) particle is a sphere with a
diameter of 10 µm. Within the element recommended maximum pressure drop, 10 µm (400 micro-inch) nominal implies that the
efficiency of the filter on particles that are 10 µm or larger in diameter will be no less than 90 % for the life of the element.
Absolute particle ratings are different. An absolute filter rating implies that no particle of the rating size or larger will pass; for
example, a filter rating may be 10 µm (400 micro-inch) nominal and 15 µm (600 micro-inch) absolute.
A common suction line may be used, but shall then be sized for the capability of two pumps.
Key
1 Alarm 11 Mist eliminator
2 Filter 12 Fill connection
3 Interlock 13 Oil reservoir, stainless steel
4 Shutdown 14 Auxiliary pump, motor driven
5 Alarm/pump start 15 Main oil pump, motor driven
6 Optional 16 See the above provisions for suction lines
7 Driver 17 Steam coil, optional
8 Compressor 18 Drain valve
9 Oil cooler 19 Electric heater
10 Manhole 20 On/off
Figure 1 — Sketch of minimum requirements for pressure lubrication system
ISO 10442:2002(E)
NOTE For abbreviations, see ISO 3511-1.
Figure 1 (continued)
� 4.2.2.7 If specified, a removable steam-heating element, external to the oil reservoir, or a thermostatically
controlled electric immersion heater with a sheath of austenitic stainless steel shall be provided for heating the
charge capacity of oil before start-up in cold weather. The heating device shall have sufficient capacity to heat the
oil in the reservoir from the specified minimum site ambient temperature to the manufacturer's required start-up
temperature within 12 h. If an electric immersion heater is used, it shall have a maximum watt density of 2,4 W/cm .
4.2.2.8 Unless otherwise specified, an austenitic stainless steel oil reservoir shall be supplied, having the
following characteristics and appendages:
a) the capacity to avoid frequent refilling, to provide adequate allowance for system rundown, and to settle
moisture and foreign matter adequately;
b) provisions to eliminate air and to minimize flotation of foreign matter to pump suctions;
c) separate fill and vent connections, a level indicator with an armoured gauge glass and a breather suitable for
outdoor use;
d) a sloped bottom and connections for complete drainage;
e) cleanout openings large enough to provide access for thorough cleaning;
f) an interior that has been descaled and protected from rust by the manufacturer's standard procedure, subject
to the purchaser's approval (permanent surface coatings shall not be applied without the purchaser's specific
approval);
g) a retention time of at least 3 min, based on normal flow and total volume below the normal operating level.
4.2.2.9 The vendor shall state in the instruction manual the required amount, specifications and supply
temperature, and the pressure ranges for the lubrication oil.
4.2.2.10 The oil system drain lines (as well as the reservoir vent or mist eliminator, or both) shall be large
enough to prevent emission of visible oil vapours above the vent. They shall also be large enough to provide
adequate drainage with the airflow from the sealing system into the oil system, with seal clearances that are at
least twice the design clearance.
10 © ISO 2002 – All rights reserved
ISO 10442:2002(E)
4.2.3 Piping
4.2.3.1 General
� 4.2.3.1.1 Piping design and joint fabrication, examination and inspection shall be in accordance with the piping
design code.
4.2.3.1.2 Auxiliary systems in the following services shall be considered as piping systems:
a) instrument and control air;
b) lubricating oil;
c) cooling water;
d) sealing fluid;
e) drains;
f) interstage piping.
NOTE For casing connections, see 4.3.5.
4.2.3.1.3 Piping systems shall include piping isolating valves, control valves, relief valve, pressure reducers,
orifices, thermometers and thermowells, pressure gauges, sight flow indicators, and all related vents and drains.
4.2.3.1.4 The vendor shall furnish all piping systems, including mounted appurtenances, located within the
confines of the package. Each piping system requiring external connections shall terminate with flanged single-
supply and single-return connections at the edge of the package. It is not necessary to provide flanged connections
for instrument tubing systems. The purchaser shall furnish only interconnecting piping between equipment
groupings and off-base facilities.
4.2.3.1.5 The design of piping systems shall achieve the following:
a) proper support and protection to prevent damage due to vibration from shipment, operation or maintenance;
b) proper flexibility and normal accessibility for operation, maintenance and thorough cleaning;
c) installation in a neat and orderly arrangement adapted to the contour of the package without obstruction of
access openings;
d) elimination of air pockets;
e) complete drainage through low points without disassembly of piping.
4.2.3.1.6 Piping should be fabricated by bending and welding to minimize the use of flanges and fittings. Welded
flanges are permitted only at equipment connections, at the edge of any base, and for ease of maintenance.
Threaded connections shall be kept to a minimum. Pipe bushing shall not be used.
4.2.3.1.7 Pipe threads shall be taper threads in accordance with the piping design code. Flanges shall be in
accordance with the piping design code. Slip-on flanges are permitted only with the purchaser's specific approval.
For socket-welded construction, a 1,5 mm (1/8 in) gap shall be left between the pipe end and the bottom of the
socket.
4.2.3.1.8 Threaded connections for oil service shall be seal-welded; however, seal welding is not permitted on
cast iron equipment, on instruments, or where disassembly is required for maintenance. Seal-welded joints shall be
made in accordance with the piping design code.
4.2.3.1.9 Connections, pipe, valves and fittings of nominal pipe size DN 32 (NPS 1¼), DN 65 (NPS 2½),
DN 90 (NPS 3½) or DN 125 (NPS 5) shall not be used.
ISO 10442:2002(E)
4.2.3.1.10 Seamless carbon steel piping shall be in accordance with the piping design code. Stainless steel
piping shall be seamless or electric-fusion welded in accordance with the piping design code. The schedules shall
be in accordance with Table 2.
4.2.3.1.11 Where space does not permit the use of nominal pipe sizes DN 15 (NPS ½), DN 20 (NPS ¾) and
DN 25 (NPS 1), seamless carbon steel or stainless steel tubing may be furnished. Except for the lube oil system,
steel fittings may be furnished with stainless steel tubing. Tubing thickness shall meet the requirements of Table 3.
Equivalent materials and the make and model of fittings shall be subject to the purchaser's approval.
4.2.3.1.12 The minimum size of any connection shall be DN 6 (NPS ¼).
4.2.3.1.13 Piping systems furnished by the vendor shall be fabricated, installed in the shop, and properly
supported. Bolt holes for flanged connections shall straddle lines parallel to the main horizontal or vertical
centreline of the equipment.
Table 2 — Minimum piping schedules
Material Nominal pipe size Minimum schedule
mm
Carbon steel DN 20 and smaller 160
Carbon steel DN 25 and DN 40 80
Carbon steel DN 50 and larger 40
Stainless steel DN 40 and smaller 40S
Stainless steel DN 50 and larger 10S
Table 3 — Minimum tubing wall thickness
Nominal tubing size Minimum wall thickness
mm mm
12,5 1,65
20 2,41
25 2,76
4.2.3.2 Oil piping
4.2.3.2.1 Oil-supply piping, tubing and fittings (excluding slip-on flanges) shall be of stainless steel.
4.2.3.2.2 Oil drains shall be sized to run no more than half full when flowing at a velocity of 0,3 m/s and shall be
arranged to ensure good drainage (recognizing the possibility of foaming conditions). Horizontal runs shall slope
continuously at least 40 mm/m toward the reservoir. If possible, laterals (not more than one in any transverse
plane) should enter drain headers at 45° angles in the direction of the flow.
4.2.3.2.3 Non-consumable backup rings and sleeve-type joints shall not be used. Pressure piping down-stream
of oil filters shall be free from internal obstructions that could accumulate dirt. Pipe joints downstream of the oil filter
(filter to bearing housing) shall be butt-welded. Piping joints in return lines and upstream of the filter (reservoir to
filter) may be socket-welded. Threaded connections shall be used for instrument connections and where tubing is
used.
12 © ISO 2002 – All rights reserved
ISO 10442:2002(E)
4.2.3.3 Instrument piping
Unless otherwise specified, instrument and
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