Standard Specification for Centrifugal Pump, Shipboard Use

ABSTRACT
This specification covers the requirements applicable to the design and construction of three classes of centrifugal pump (Class 1, Class 2, and Class 3) for shipboard application. When selecting material combinations, the conditions under which the various materials interact with each other shall be taken into consideration as well as the use of nonmetallic (composite) pump components where the use of that material can benefit the operation and maintenance of the pump. The requirements for the following are detailed: (1) pump design and construction, (2) pump operation (at or near the best efficiency point), (3) motor power ratings, (4) pitch and roll conditions, (5) horizontal pump and driver mounting, (6) vertical pump support, (7) bedplates, (8) pump couplings, (9) guards, (10) pumps with face-mounted motors, (11) shaft alignment, and (12) indication of direction of rotation. Pump design requirements for inlet and outlet connections, casings, radial and thrust bearings, journal and thrust bearings, rolling element bearings, mechanical seals, separate pressure boundary parts, and screw threads are specified. Requirements for paintings and coatings, equipment identification plates, and testing such as hydrostatic, mechanical run, performance, net positive suction head, vibration, and acoustic tests are also specified.
SCOPE
1.1 This specification covers the requirements applicable to the design and construction of centrifugal pumps for shipboard application. The three classes of service covered by this specification are as follows:
1.1.1 Class 1-Freshwater,
1.1.2 Class 2-Seawater, and
1.1.3 Class 3-Hydrocarbon pumps (less than 1500 SSU).
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.

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Publication Date
30-Apr-2004
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ASTM F998-04 - Standard Specification for Centrifugal Pump, Shipboard Use
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: F998 – 04
Standard Specification for
1
Centrifugal Pump, Shipboard Use
ThisstandardisissuedunderthefixeddesignationF998;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope B164 Specification for Nickel-Copper Alloy Rod, Bar, and
Wire
1.1 This specification covers the requirements applicable to
B271 Specification for Copper-Base Alloy Centrifugal
the design and construction of centrifugal pumps for shipboard
Castings
application. The three classes of service covered by this
B369 Specification for Copper-Nickel Alloy Castings
specification are as follows:
B505/B505M Specification for Copper Alloy Continuous
1.1.1 Class 1—Freshwater,
Castings
1.1.2 Class 2—Seawater, and
B584 Specification for Copper Alloy Sand Castings for
1.1.3 Class 3—Hydrocarbon pumps (less than 1500 SSU).
General Applications
1.2 The values stated in inch-pound units are to be regarded
F468 Specification for Nonferrous Bolts, Hex Cap Screws,
as the standard. The values given in parentheses are provided
and Studs for General Use
for information purposes only.
F1511 Specification for Mechanical Seals for Shipboard
2. Referenced Documents
Pump Applications
2
2.2 ANSI Standards:
2.1 ASTM Standards:
3
B1 ISO Metric Screw Threads (ANSI-B1 Report)
A36/A36M Specification for Carbon Structural Steel
3
B1.1 Unified Screw Threads
A193/A193M Specification for Alloy-Steel and Stainless
3
B16.1 Cast Iron Pipe Flanges and Flange Fittings
Steel Bolting Materials for High Temperature or High
B16.5 Steel Pipe Flanges, Flanged Valves and Fittings, 150,
Pressure Service and Other Special Purpose Applications
3
300, 400, 600, 900, 1500 and 2500 lb.
A194/A194M Specification for Carbon and Alloy Steel
B16.11 Forged Steel Fittings, Socket Welding and
Nuts for Bolts for High Pressure or High Temperature
3
Threaded
Service, or Both
3
B16.24 Bronze Flanges and Flanged Fittings, 150, 300lb
A276 Specification for Stainless Steel Bars and Shapes
2.3 Hydraulic Institute Standards:
A494/A494M Specification for Castings, Nickel and Nickel
ANSI/HI 1.1-1.5 American National Standard for Centrifu-
Alloy
gal Pumps for Nomenclature, Definitions, Applications
A582/A582M Specification for Free-Machining Stainless
3
and Operation
Steel Bars
ANSI/HI 1.6 American National Standard for Centrifugal
A743/A743M Specification for Castings, Iron-Chromium,
3
Pump Tests
Iron-Chromium-Nickel, Corrosion Resistant, for General
ANSI/HI 9.1-9.6 American National Standard for Pumps—
Application
General Guidelines for Types, Definitions, Applications
A747/A747M Specification for Steel Castings, Stainless,
3
and Sound Measurements
Precipitation Hardening
2.4 AFBMA Standards:
A890/A890M Specification for Castings, Iron-Chromium-
4
9 Load Ratings and Fatigue Life for Ball Bearings
Nickel-Molybdenum Corrosion-Resistant, Duplex
4
11 Load Ratings and Fatigue Life for Roller Bearings
(Austenitic/Ferritic) for General Application
2.5 ISO Standards:
B148 Specification for Aluminum-Bronze Sand Castings
ISO9001 QualitySystemsandQualityAssurance—Design/
3
Development, Production, Installation and Service
1
This specification is under the jurisdiction of Committee F25 on Ships and
Marine Technology and is the direct responsibility of Subcommittee F25.11 on
3. Terminology
Machinery and Piping Systems.
3.1 Definitions:
Current edition approved May 1, 2004. Published May 2004. Originally
approved in 1997. Last previous edition approved in 2002 as F998 – 02. DOI:
10.1520/F0998-04.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American National Standards Institute, 25 W. 43rd St., 4th
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Floor, New York, NY 10036.
4
Standards volume information, refer to the standard’s Document Summary page on Anti-Friction Bearing ManufacturersAssociation, Inc., 1101 ConnecticutAve.,
the ASTM website. N.W., Suite 700, Washington, DC 20036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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F998 – 04
3.1.1 best effıciency point (BEP), n—the capacity and head 3.1.19 nonmetallic materials, n—any material that would
in which the pump efficiency is the highest. not be recognized as a metal. Examples include plastics,
fiberglass resins, carbon fiber, fiberglass-reinforced vinyl ester,
3.1.2 BHP, n—power delivered to the pump from the driver
polytetrafluoroethylene (PTFE), or any similar material.
in brake horse power.
3.1.20 non-overloading power characteristics, n—thischar-
3.1.3 c
...

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