ASTM F1431-92(2016)

Standard Specification for Water Trap for Diesel Exhaust

ABSTRACT
This specification covers the material, dimensions, and construction of a water trap for diesel exhaust. The diesel exhaust water trap system shall consist of a tank and baffles manufactured from a nickel-chromium-molybdenum-columbium alloy, with gaskets made of nonmetallic materials. A minimum of three baffles shall be installed. The traps shall withstand the maximum temperatures specified, be free of paint, and be so designed such as to prevent sea backwash from entering the diesel exhaust system. The trap and piping systems shall prevent dirt accumulation, with the welding being of small, even beading, free of slag and splatter. Pneumatic proof testing of each trap shall be performed with no visible seam leakage and shall conform to the requirements specified.
SCOPE
1.1 This specification covers the material, dimensions, and construction of diesel exhaust water traps, which shall be required whenever the exhaust is to be expelled through the hull of the vessel.  
1.2 The traps are designed to prevent sea backwash from entering the diesel exhaust system.  
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

General Information

• Status: Historical
• Publication Date: 31-Aug-2016
• ICS: 47.020.20 - Marine engines and propulsion systems
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:F1431 −92 (Reapproved 2016) An American National Standard
Standard Specification for
1
Water Trap for Diesel Exhaust
This standard is issued under the fixed designation F1431; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 ASTM designation, title and date of this specification,
3.1.2 Quantity,
1.1 This specification covers the material, dimensions, and
3.1.3 Size,
construction of diesel exhaust water traps, which shall be
3.1.4 Shocktestandgrade(seeSupplementaryRequirement
required whenever the exhaust is to be expelled through the
S1),
hull of the vessel.
3.1.5 Handhole shall be at 45° unless otherwise specified,
1.2 The traps are designed to prevent sea backwash from
and
entering the diesel exhaust system.
3.1.6 Flange dimensions shall be indicated for gaskets.
1.3 The values stated in SI units are to be regarded as
standard. The values given in parentheses are mathematical
4. Materials and Manufacture
conversions to inch-pound units that are provided for informa-
4.1 Materials:
tion only and are not considered standard.
4.1.1 The tank and baffles shall be of nickel-chromium-
2. Referenced Documents
molybdenum-columbium alloy and tested in accordance with
2
2.1 ASTM Standards: Specification B443.
B443 Specification for Nickel-Chromium-Molybdenum-
4.1.2 Gaskets—Gaskets shall be ASTM Classification F104
Columbium Alloy(UNS N06625) and Nickel-Chromium- (F712100–A9B4–E22K5M6) and shall withstand temperatures
Molybdenum-SiliconAlloy (UNS N06219) Plate, Sheet,
of 650°C (1200°F).
and Strip
4.2 Manufacture:
F104 Classification System for Nonmetallic Gasket Materi-
4.2.1 Construction of the water traps shall be in accordance
als
with this specification and Fig. 1.
3
2.2 Military Standard:
4.2.2 Welding shall be in accordance with ABS Rules for
MIL-S-901 Requirements for Shock Tests, High Impact,
Building and Classing Steel Vessels or AWS D1.1.
Shipboard Machinery, Equipment and Systems
2.3 Other Documents:
4 5. Requirements
ABS Rules for Building and Classing Steel Vessels
5
AWS D1.1 Structural Welding Code
5.1 Water traps for diesel exhaust systems shall be designed
for maximum temperatures of 650°C (1200°F).
3. Ordering Information
5.2 Baffles:
3.1 Water traps ordered under this specification shall in-
5.2.1 No less than three baffles shall be installed. The
clude the following information:
bottom baffle shall not extend below the top of the outlet pipe,
as shown in Fig. 1.
1
This specification is under the jurisdiction of ASTM Committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on 5.2.2 The inlet may be rotated about the centerline of the
Machinery and Piping Systems.
trap to suit the installations. The top baffle shall also be rotated
Current edition approved Sept. 1, 2016. Published September 2016. Originally
to retain the same relation with the inlet as shown in Fig. 1.
approved in 1992. Last previous edition approved in 2010 as F1431 – 92 (2010).
DOI: 10.1520/F1431-92R16.
5.3 Trap Size:
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3.1 The trap size shall be a minimum of1m(3ft) high.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on 5.3.2 The diameter shall equal twice the diameter of the
the ASTM website.
inlet exhaust line.
3
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
5.3.3 The minimum free area through the trap shall equal
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
4
twice the area of the outlet exhaust line.
Available from American Bureau of Shipping (ABS), ABS Plaza, 16855
Northchase Dr., Houston, TX 77060, http://www.eagle.org.
5
5.4 Hand Hole—The hand hole shall be configured as
Available from American Welding Society (AWS), 8669 NW 36 St., #130,
Miami, FL 33166-6672, http://www.aws.org. indicated in Fig. 1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F1431−92 (2016)
FIG. 1 Water Trap for Diesel Exhaust
6. Dimensions 10. Marking
6.1 The dimensions in Fig. 1 are recommended nominal
10.1 Each water trap shall bear a weathertight tag showing
dimensions.
the purchase order number,ASTM designation, size, and name
of manufacturer. The markings on the package shall be
7. Workmanship, Finish, and Appearance
approximately 25.4 mm (1 in.) high.
7.1 Workmanship on traps and piping shall be of sufficient
quality to prevent dirt accumulation. W
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1431 − 92 (Reapproved 2010) F1431 − 92 (Reapproved 2016)An American National Standard
Standard Specification for
1
Water Trap for Diesel Exhaust
This standard is issued under the fixed designation F1431; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers the material, dimensions, and construction of diesel exhaust water traps, which shall be required
whenever the exhaust is to be expelled through the hull of the vessel.
1.2 The traps are designed to prevent sea backwash from entering the diesel exhaust system.
1.3 The values stated in SI (metric) units shall are to be regarded as the standard. The values given in parentheses are for
information only. mathematical conversions to inch-pound units that are provided for information only and are not considered
standard.
2. Referenced Documents
2
2.1 ASTM Standards:
B443 Specification for Nickel-Chromium-Molybdenum-Columbium Alloy(UNS N06625) and Nickel-Chromium-Molybdenum-
SiliconAlloy (UNS N06219) Plate, Sheet, and Strip
F104 Classification System for Nonmetallic Gasket Materials
3
2.2 Military Standard:
MIL-S-901 Requirements for Shock Tests, High Impact, Shipboard Machinery, Equipment and Systems
2.3 Other Documents:
4
American Bureau of Shipping ABS Rules for Building and Classing Steel Vessels
5
American Welding Society Publication AWS D1.1 Structural Welding Code
3. Ordering Information
3.1 Water traps ordered under this specification shall include the following information:
3.1.1 ASTM designation, title and date of this specification,
3.1.2 Quantity,
3.1.3 Size,
3.1.4 Shock test and grade (see Supplementary Requirement S1),
3.1.5 Handhole shall be at 45° unless otherwise specified, and
3.1.6 Flange dimensions shall be indicated for gaskets.
4. Materials and Manufacture
4.1 Materials:
4.1.1 The tank and baffles shall be of nickel-chromium-molybdenum-columbium alloy and tested in accordance with
Specification B443.
4.1.2 Gaskets—Gaskets shall be ASTM Classification F104 (F712100–A9B4–E22K5M6) and shall withstand temperatures of
650 °C (1200 °F).650°C (1200°F).
4.2 Manufacture:
1
This specification is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems.
Current edition approved May 1, 2010Sept. 1, 2016. Published June 2010September 2016. Originally approved in 1992. Last previous edition approved in 20042010 as
F1431 – 92 (2010). (2004). DOI: 10.1520/F1431-92R10.10.1520/F1431-92R16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
4
Available from American Bureau of Shipping (ABS), ABS Plaza, 16855 Northchase Dr., Houston, TX 77060, http://www.eagle.org.
5
Available from American Welding Society (AWS), 550 NW LeJeune Rd., 8669 NW 36 St., #130, Miami, FL 33126,33166-6672, http://www.aws.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F1431 − 92 (2016)
4.2.1 Construction of the water traps shall be in accordance with this specification and Fig. 1.
FIG. 1 Water Trap for Diesel Exhaust
4.2.2 Welding shall be in accordance with the American Bureau of Shipping ABS Rules for Building and Classing Steel Vessels
or the American Welding Society Publication AWS D1.1.
5. Requirements
5.1 Water traps for diesel exhaust systems shall be designed for maximum temperatures of 650 °C (1200 °F).650°C (1200°F).
5.2 Baffles:
5.2.1 No less than three baffles shall be installed. The bottom baffle shall not extend below the top of the outlet pipe, as shown
in Fig. 1.
5.2.2 The inlet may be rotated about the centerline of the trap to suit the installations. The top baffle shall also be rotated to retain
the same relation with the inlet as shown in Fig. 1.
5.3 Trap Size:
5.3.1 The trap size shall be a minimum of 1 m (3 ft) high.
5.3.2 The diameter shall equal twice the diameter of the inlet exhaust
...