prEN ISO 13710
(Main)Petroleum, petrochemical and natural gas industries - Reciprocating positive displacement pumps (ISO/DIS 13710:2010)
Petroleum, petrochemical and natural gas industries - Reciprocating positive displacement pumps (ISO/DIS 13710:2010)
2018-06-15 Project abandoned following ISO's cancellation of the project
Erdöl-, petrochemische und Erdgasindustrie - Oszillierende Verdrängerpumpen (ISO/DIS 13710:2010)
Industries pétrolière, pétrochimique et du gaz naturel - Pompes volumétriques alternatives (ISO/DIS 13710:2010)
Industrija za predelavo nafte in zemeljskega plina - Oscilacijske črpalke z izpodrivnim delovanjem (ISO/DIS 13710:2010)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2011
,QGXVWULMD]DSUHGHODYRQDIWHLQ]HPHOMVNHJDSOLQD2VFLODFLMVNHþUSDONH]
L]SRGULYQLPGHORYDQMHP ,62',6
Petroleum, petrochemical and natural gas industries - Reciprocating positive
displacement pumps (ISO/DIS 13710:2010)
Erdöl-, petrochemische und Erdgasindustrie - Oszillierende Verdrängerpumpen (ISO/DIS
13710:2010)
Industries pétrolière, pétrochimique et du gaz naturel - Pompes volumétriques
alternatives (ISO/DIS 13710:2010)
Ta slovenski standard je istoveten z: prEN ISO 13710
ICS:
23.080 ýUSDONH Pumps
75.180.20 Predelovalna oprema Processing equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2010
ICS 75.180.20 Will supersede EN ISO 13710:2004
English Version
Petroleum, petrochemical and natural gas industries -
Reciprocating positive displacement pumps (ISO/DIS
13710:2010)
Industries pétrolière, pétrochimique et du gaz naturel - Erdöl-, petrochemische und Erdgasindustrie - Oszillierende
Pompes volumétriques alternatives (ISO/DIS 13710:2010) Verdrängerpumpen (ISO/DIS 13710:2010)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 12.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 13710:2010: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (prEN ISO 13710:2010) 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 AFNOR.
This document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 13710:2004.
Endorsement notice
The text of ISO/DIS 13710:2010 has been approved by CEN as a prEN ISO 13710:2010 without any
modification.
DRAFT INTERNATIONAL STANDARD ISO/DIS 13710
ISO/TC 115/SC 3 Secretariat: ANSI
Voting begins on: Voting terminates on:
2010-11-11 2011-04-11
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Petroleum, petrochemical and natural gas industries —
Reciprocating positive displacement pumps
Industries pétrolière, pétrochimique et du gaz naturel — Pompes volumétriques alternatives
[Revision of first edition (ISO 13710:2004)]
ICS 75.180.20
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED 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 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 NATIONAL REGULATIONS.
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.
©
International Organization for Standardization, 2010
ISO/DIS 13710
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ii ISO 2010 – All rights reserved
ISO/DIS 13710
Contents Page
Foreword . vii
Introduction . viii
1 Scope .1
2 Normative references .1
3 Terms and definitions .4
4 Unit Responsibility .8
5 Basic requirements.9
5.1 Units .9
5.2 Statutory Requirements .9
5.3 Requirement governance .9
6 Basic design .9
6.1 General .9
6.2 Selection of pump type . 12
6.3 Ratings . 12
6.4 Pressure-containing and pressure-retaining parts . 16
6.5 Cylinder connections . 17
6.6 External forces and moments . 19
6.7 Liquid-end features. 19
6.7.1 Liners . 19
6.7.2 Pistons, plungers and piston rods . 21
6.7.3 Valve seats . 21
6.7.4 Gaskets . 21
6.7.5 Stuffing boxes, packing and glands . 21
6.8 Power-end running gear . 22
6.9 Direct-acting pump . 25
6.10 Lubrication . 25
6.10.1 Lubrication for power pumps . 25
6.10.2 Lubrication for liquid end and power end . 26
6.11 Materials . 26
6.11.1 General . 26
6.11.2 Positive Materials Identification (PMI) . 28
6.11.3 Castings . 29
6.11.4 Forgings . 30
6.11.5 Welding . 30
6.11.6 Low-temperature service . 31
6.12 Nameplates and rotation arrows . 32
7 Accessories . 33
7.1 Drivers . 33
7.1.1 General . 33
7.1.2 Motors . 33
7.1.3 Steam turbines . 34
7.1.4 Gear units . 34
7.2 Couplings and guards . 34
7.3 Belt drives . 35
7.4 Mounting plates . 36
7.4.1 General . 36
7.4.2 Baseplate and skid . 37
7.4.3 Soleplates and sub-soleplates . 38
DRAFT 2010
ISO/DIS 13710
7.5 Controls and instrumentation . 39
7.5.1 General . 39
7.5.2 Control systems . 39
7.5.3 Instrument and control panels . 39
7.5.4 Instrumentation . 40
7.5.5 Alarms and shutdowns . 41
7.5.6 Electrical systems . 41
7.6 Auxiliary piping . 42
7.7 Pulsation and vibration control requirements. 42
7.7.1 General . 42
7.7.2 Selection and scope of design analysis methods . 43
7.8 Special tools . 44
8 Inspection, testing and preparation for shipment . 44
8.1 General . 44
8.2 Inspection . 45
8.2.1 General . 45
8.2.2 Materials inspection . 45
8.2.3 Mechanical inspection . 46
8.3 Testing . 46
8.3.1 General . 46
8.3.2 Hydrostatic test . 46
8.3.3 Pre-testing check . 47
8.3.4 Mechanical run test . 47
8.3.5 Performance test for direct-acting pump . 48
8.3.6 Performance test for power pump . 48
8.3.7 Test tolerances . 48
8.3.8 NPIP/NPSH test . 49
8.4 Optional tests . 49
8.5 Preparation for shipment . 49
9 Vendor’s data . 50
9.1 General . 50
9.2 Proposals . 51
9.2.1 General . 51
9.2.2 Drawings. 51
9.2.3 Technical data . 52
9.2.4 Performance envelope . 53
9.2.5 Optional tests . 53
9.3 Contract data . 53
9.3.1 General . 53
9.3.2 Drawings and technical data . 53
9.3.3 Progress reports . 53
9.3.4 Parts lists and recommended spares . 53
9.3.5 Installation, operation, maintenance and technical data manuals . 54
Annex A (informative) Pump material specifications . 55
Annex B (normative) Vendor drawing and data requirements (VDDR) form . 62
Annex C (normative) Pulsation and vibration control techniques . 65
C.1 Design analysis methods — General . 65
C.2 Analysis Method 1 . 65
C.3 Analysis Method 2 (acoustical simulation) . 66
C.3.1 General . 66
C.3.2 Mechanical review and piping restraint analysis . 66
C.4 Maximum allowable pulsation levels . 66
C.5 Inlet pressure versus liquid vapour pressure . 67
C.6 Pressure-limiting valve protection . 67
C.7 Separation margin requirements for piping systems . 69
Annex D (informative) Reciprocating positive-displacement pump data sheets . 70
iv © ISO 2009 – All rights reserved
DRAFT 2010
ISO/DIS 13710
Annex E (informative) NPIP and NPSH. 73
E.1 General . 73
E.2 Calculation of NPIPA . 73
E.3 Calculation of acceleration head. 74
E.4 Effect of impedance on acceleration . 75
Annex F (informative) Inspector's checklist . 76
Annex G (normative) Lubrication system . 78
Bibliography . 80
DRAFT 2010
ISO/DIS 13710
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 2.
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 document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 13710 was prepared by Technical Committee ISO/TC 115, Pumps, Subcommittee SC 3, Installation and
special application, in collaboration with ISO/TC 67, Materials, equipment and offshore structures for
petroleum, petrochemical and natural gas industries, Subcommittee SC 6, Processing equipment and systems.
This second edition cancels and replaces the first edition (ISO 13710:2004), which has been technically
revised.
vi © ISO 2009 – All rights reserved
DRAFT 2010
ISO/DIS 13710
Introduction
This International Standard was developed from API Std 674, 2nd edition, 1995, with the intent that the
3rd edition of API Std 674 will be the same as this International Standard.
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 appropriate 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.
This International Standard requires the purchaser to specify certain details and features.
A bullet (•) at the beginning of a paragraph indicates that either a decision is required or further information is
to be provided by the purchaser. This information should be shown on data sheets or stated in the enquiry or
purchase order (see examples in Annex D).
In this International Standard, where practical, US Customary (USC) units are included in brackets for
information.
Annex A lists typical materials standards used in pumps.
Annex B contains a form in which are listed the vendor drawing and data requirements (VDDR).
Annex C specifies techniques for pulsation and vibration control.
Annex D contains typical data sheets.
Annex E describes pump system interaction and explains the differences between NPIP and NPSH.
Annex F contains an inspector's checklist.
Annex G specifies requirements for the lubrication system.
DRAFT 2010
DRAFT INTERNATIONAL STANDARD ISO/DIS 13710
Petroleum, petrochemical and natural gas industries —
Reciprocating positive displacement pumps
1 Scope
This International Standard specifies requirements for reciprocating positive-displacement pumps and pump
units for use in the petroleum, petrochemical and natural gas industries. It is applicable to both direct-acting
and power-frame types.
This International Standard is not applicable to controlled-volume pumps and rotary pumps.
NOTE For controlled-volume pumps see API Std 675; for rotary pumps see API Std 676.
2 Normative references
The following referenced documents are indispensable for the application 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 7 (all parts), Pipe threads where pressure-tight joints are made on the threads
ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation
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 281, Rolling bearings Dynamic load ratings and rating life
ISO 286-2, ISO system of limits and fits — Part 2: Tables of standard tolerance grades and limit deviations for
holes and shafts
ISO 724, ISO general-purpose metric screw threads — Basic dimensions
ISO 965 (all parts), ISO general-purpose metric screw threads — Tolerances
ISO 1328-1, Cylindrical gears — ISO system of accuracy — Part 1: Definitions and allowable values of
deviations relevant to corresponding flanks of gear teeth
ISO 1940-1, Mechanical vibration — Balance quality requirements of rigid rotors — Part 1: Determination of
permissible residual imbalance
ISO 3448, Industrial liquid lubricants — ISO viscosity classification
ISO 5753, Rolling bearings —Radial internal clearance
ISO 6336, Calculation of load capacity of spur and helical gears
DRAFT 2010
ISO/DIS 13710
ISO 6708, Pipework components — Definition and selection of DN (nominal size)
ISO 7005-1:1992, Metallic flanges — Part 1: Steel flanges
ISO 7005-2, Metallic flanges — Part 2: Cast iron flanges
ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel
substrates and of steel substrates after overall removal of previous coatings
ISO 10300, Calculaton of load capacity of bevel gears
ISO 10438 (all parts), Petroleum and natural gas industries — Lubrication, shaft-sealing and control-oil
systems and auxiliaries
ISO 13707, Petroleum and natural gas industries — Reciprocating compressors
ISO 15649, Petroleum and natural gas industries — Piping
IEC 60034 (all parts), Rotating electrical machines
IEC 60079 (all parts), Explosive atmospheres
IEC 60079-10-1, Explosive atmospheres – Part 10-1: Classification of areas – Explosive gas atmospheres
1)
EN 287 (all parts), Qualification test of welders — Fusion welding
EN 288 (all parts), Specification and approval of welding procedures for metallic materials
EN 13445 (all parts), Unfired pressure vessels
ABMA 7, Shaft and housing fits for metric radial ball and roller bearings (except tapered roller bearings)
2)
conforming to basic boundary plan
3)
AGMA 2015-1, Accuracy classification system — Tangential measurements for cylindrical gears
AGMA 6010, Standard for spur, helical, herringbone, and bevel enclosed drives
AGMA 6091, Standard for gearmotor, shaft mounted and screw conveyor drives
AGMA 9002, Bores and keyways for flexible couplings (inch series)
4)
API Std 526, Flanged steel pressure relief valves
API Std 541, Form-wound squirrel cage induction motors — 250 horsepower and larger
API Std 546, Brushless synchronous machines — 500 kVA and larger
API Std 611, General-purpose steam turbines for petroleum, chemical, and gas industry services
API Std 677, General-purpose gear units for petroleum, chemical and gas industry services
1)
Comité Européen de Normalisation, 36, rue de Stassart, B-1050 Brussels, Belgium.
2)
American Bearing Manufacturers Association, 2025 M Street, NW, Suite 800, Washington, DC 20036, USA.
3)
American Gear Manufacturers Association, 1500 King Street, Suite 201, Alexandria, VA 22314, USA.
4)
American Petroleum Institute, 1220 L Street NW , Washington, DC 20005-4070, USA.
2 © ISO 2009 – All rights reserved
DRAFT 2010
ISO/DIS 13710
API RP 686, Machinery installation and installation design
ASA S2.19, Mechanical vibration — Balance quality requirements of rigid rotors — Part 1: Determination of
5)
permissible residual unbalance, including marine applications
6)
ASME Boiler and pressure vessel code, Section V, Non-destructive examination
ASME Boiler and pressure vessel code, Section VIII, Rules for construction of pressure vessels, division 1
ASME Boiler and pressure vessel code, Section IX, Welding and brazing qualifications
ASME B1.1, Unified inch screw threads, UN and UNR thread form
ASME B16.1, Cast iron pipe flanges and flanged fittings classes 25, 125 and 250
ASME B16.5, Pipe flanges and flanged fittings NPS 1/2 through NPS 24
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
7)
AWS D1.1, Structural welding code — Steel
8)
DIN 910, Heavy-duty hexagon head screw plugs
DIN 3990,
DIN 3991,
9)
HI 6.6, Reciprocating pump tests
HI 8.1-8.5, Direct acting (steam) pumps — Nomenclature, definitions, applications, and operation
IEEE 841, Standard for the petroleum and chemical industry — Severe duty totally enclosed fan-cooled
10)
(TEFC) squirrel cage induction motors — up to and including 370 kW (500 hp)
MSS SP-55, Quality standard for steel castings for valves, flanges, fittings and other piping components -
11)
Visual method for evaluation of surface irregularities
12)
NACE MR0175, Sulfide stress cracking resistant metallic materials for oilfield equipment
5)
Acoustical Society of America, 35 Pinelawn Road, Suite 114 East, Melville, NY 11747, USA.
6)
American Society of Mechanical Engineers, Three Park Avenue, New York, NY 10016-5990, USA.
7)
American Welding Society, 550 North LeJeune Road, Miami, FL 33136, USA.
8)
Deutsches Institut für Normung E.V., Burggrafenstrasse 6, 10787 Berlin, Germany.
9)
Hydraulics Institute, 9 Sylvan Way, Parsippany, NJ 07054, USA.
10)
Institute of Electrical & Electronics Engineers, 445 Hoes Lane, Piscataway, NJ 08855-1331, USA.
11) Manufacturers Standardization Society of the Valve and Fittings Industry Inc., 127 Park Street NE Vienna, VA 22180,
USA.
12)
National Association of Corrosion Engineers, 1440 South Creek Drive, Houston, TX 77084-4906, USA.
DRAFT 2010
ISO/DIS 13710
13)
NFPA 70:2002, National Electrical Code
14)
SSPC SP 6, Surface preparation specification
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
acoustical simulation
process whereby the acoustical characteristics of fluids and the reciprocating-pump dynamic flow influence
are modelled
3.2
alarm point
preset value of a measured parameter at which an alarm is activated to warn of a condition that requires
corrective action
3.3
anchor bolt
bolt used to attach the mounting plate to the support structure
NOTE The support structure is usually a concrete foundation or steel structure.
cf. hold-down bolt (3.6)
3.4
direct-acting pump
reciprocating pump consisting of a piston-powered drive end connected directly to a liquid end to which power
is directly transmitted by the action of the motive fluid on the piston
NOTE A direct-acting pump can use steam, air, or gas as the motive fluid.
3.5
flammable liquid
liquid that has a closed-cup flash point below 37,8 °C (100 °F), as determined by recommended test
procedures and apparatus
NOTE Suitable test procedures are e.g. those set forth in NFPA 30.
3.6
hold-down bolt
mounting bolt
bolt that holds the equipment to the mounting plate
3.7
inlet reference point
position, upstream of any pulsation suppression device, at which the purchaser's connection is made
NOTE At the inlet reference point the specified inlet conditions, such as inlet pressure, inlet temperature and NPIP,
apply.
13)
National Fire Protection Association, 1 Battery March Park, Quincy, MA 02269-9101, USA.
14)
Society for Protective Coatings, 40 24th Street, 6th Floor, Pittsburgh, PA 15222-4643, USA.
4 © ISO 2009 – All rights reserved
DRAFT 2010
ISO/DIS 13710
3.8
local
〈of a device〉 mounted on the equipment mounting plate
3.9
maximum allowable speed
highest speed at which the manufacturer's design permits continuous operation
cf. speed (3.40)
3.10
maximum allowable temperature
maximum continuous liquid temperature for which the manufacturer has designed the equipment when
handling the specified liquid at the specified maximum operating pressure
3.11
maximum allowable working pressure
MAWP
maximum continuous pressure for which the manufacturer has designed the equipment when handling the
specified liquid at the specified maximum operating temperature
NOTE This applies to the pump. A lower limit can be imposed to protect downstream equipment.
3.12
maximum continuous speed
highest rotational speed at which the machine, as built and tested, is capable of continuous operation with the
specified liquid at any of the specified operating conditions
NOTE Rotational speed is expressed in revolutions per minute.
cf. speed (3.40)
3.13
minimum allowable liquid temperature
lowest liquid temperature for which the manufacturer has designed the equipment
3.14
minimum allowable speed
lowest operating speed at which the manufacturer's design permits continuous operation
cf. speed (3.40)
3.15
mounting plate
device used to attach equipment to concrete foundations; this is either a baseplate(s) or soleplate
NOTE See 7.4 for mounting plate specifications.
3.16
net positive inlet pressure
NPIP
minimum instantaneous pressure determined at the pump inlet reference point during pulsating pressure,
minus the vapour pressure of the liquid at the maximum operating temperature
3.17
net positive inlet pressure available
NPIPA
NPIP determined by the vendor from the NPSHA and system data
DRAFT 2010
ISO/DIS 13710
3.18
net positive inlet pressure required
NPIPR
minimum NPIP required by the pump to achieve the required performance with the specified liquid
3.19
NPIPR test
running test conducted to validate the NPIPR, using water
3.20
net positive suction head
NPSH
total absolute suction pressure, determined at the underside of the mounting plate, minus the vapour pressure
of the liquid
NOTE It is expressed as head of water, in metres (feet). Since this is measured at the underside of the mounting
plate it is a theoretical value and differs from the normal definition of NPSH.
3.21
net positive suction head available
NPSHA
minimum value of NPSH determined to be available under any specified operating condition at the underside
of the mounting plate, based on steady-state flow
NOTE NPSHA is a value provided by the purchaser which can be used by the supplier to calculate the NPIPA
(see 3.17). NPSHA is a function only of the system upstream of the pump and the operating conditions, and is
independent of pump design.
3.22
observed inspection [test]
inspection [test] for which the purchaser is notified of the timing, and the inspection [test] is performed as
scheduled irrespective of whether the purchaser or purchaser’s representative is present
3.23
panel
enclosure used to mount, display and protect gauges, switches and other instruments
3.24
performance test
running test conducted to confirm the pump's mechanical and volumetric efficiency
3.25
piston pump
reciprocating pump having a seal attached to the piston and moving within a cylinder
3.26
piston load
plunger load
force acting on one piston or plunger during any portion of the pumping cycle
3.27
plunger pump
reciprocating pump having a uniform-section plunger that moves in a static seal
3.28
power pump
reciprocating pump consisting of a power end and a liquid end connected by a frame or distance piece
NOTE 1 The power end of a power pump transmits energy from a rotating shaft to pistons or plungers by means of a
crankshaft, connecting rods and crossheads.
6 © ISO 2009 – All rights reserved
DRAFT 2010
ISO/DIS 13710
NOTE 2 The liquid end of a power pump consists of the cylinders, the pistons or plungers, and the valves.
3.29
preliminary anticipated system acceleration head
estimated pressure change due to changes in fluid velocity in the piping system
NOTE This is an important factor in the application of reciprocating pumps because of the pulsating nature of the flow
in the pump suction line. For additional information on acceleration heads, see Annex E.
3.30
pressure-containing part
part that acts as a barrier between process or motive liquid and the atmosphere
EXAMPLES Liquid cylinder, discharge manifold, suction manifold, stuffing box, cylinder plugs and covers (if in contact
with process fluid), valve seats (if a portion is in contact with the atmosphere), power cylinder, gas cylinder head, valve
chest, valve chest cover and heads.
3.31
pressure-limiting device
device to prevent the MAWP being exceeded
3.32
pressure-limiting valve accumulation pressure
pressure at which a pressure-limiting valve discharges the pump-rated flow
3.33
pressure-limiting valve set pressure
pressure at which a pressure-limiting valve starts to release pressure
3.34
pressure-retaining part
part whose failure would allow process or motive fluid to escape to the atmosphere
EXAMPLES Pressure-containing parts (3.30) and liquid and gas cylinder bolting, stuffing box bolting, gland bolting,
glands, and covers that constrain plugs and valve stops, but not parts such as packing, gaskets, pistons, plungers, piston
rings, rods, valves, seats (if completely surrounded by pressure-conta
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Questions, Comments and Discussion
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