ASTM_F_1431_-_92_2010.pdf

Designation:F143192(Reapproved 2010)An American National StandardStandard Specification forWater Trap for Diesel Exhaust1This standard is issued under the fixed designation F1431;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the material,dimensions,andconstruction of diesel exhaust water traps,which shall berequired whenever the exhaust is to be expelled through thehull of the vessel.1.2 The traps are designed to prevent sea backwash fromentering the diesel exhaust system.1.3 The values stated in SI(metric)units shall be regardedas the standard.The values given in parentheses are forinformation only.2.Referenced Documents2.1 ASTM Standards:2B443 Specification for Nickel-Chromium-Molybdenum-Columbium Alloy(UNS N06625)and Nickel-Chromium-Molybdenum-SiliconAlloy(UNS N06219)Plate,Sheet,and StripF104 Classification System for Nonmetallic Gasket Materi-als2.2 Military Standard:3MIL-S-901 Requirements for Shock Tests,High Impact,Shipboard Machinery,Equipment and Systems2.3 Other Documents:American Bureau of Shipping Rules for Building andClassing Steel Vessels4American Welding Society Publication AWS D1.1 Struc-tural Welding Code53.Ordering Information3.1 Water traps ordered under this specification shall in-clude 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 RequirementS1),3.1.5 Handhole shall be at 45 unless otherwise specified,and3.1.6 Flange dimensions shall be indicated for gaskets.4.Materials and Manufacture4.1 Materials:4.1.1 The tank and baffles shall be of nickel-chromium-molybdenum-columbium alloy and tested in accordance withSpecification B443.4.1.2 GasketsGaskets shall be ASTM Classification F104(F712100A9B4E22K5M6)and shall withstand temperaturesof 650 C(1200 F).4.2 Manufacture:4.2.1 Construction of the water traps shall be in accordancewith this specification and Fig.1.4.2.2 Welding shall be in accordance with the AmericanBureau of Shipping Rules for Building and Classing SteelVessels or the American Welding Society Publication AWSD1.1.5.Requirements5.1 Water traps for diesel exhaust systems shall be designedfor maximum temperatures of 650 C(1200 F).5.2 Baffles:5.2.1 No less than three baffles shall be installed.Thebottom 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 thetrap to suit the installations.The top baffle shall also be rotatedto 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 theinlet exhaust line.1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved May 1,2010.Published June 2010.Originallyapproved in 1992.Last previous edition approved in 2004 as F1431 92(2004).DOI:10.1520/F1431-92R10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.4Available from American Bureau of Shipping(ABS),ABS Plaza,16855Northchase Dr.,Houston,TX 77060,http:/www.eagle.org.5Available from American Welding Society(AWS),550 NW LeJeune Rd.,Miami,FL 33126,http:/www.aws.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3.3 The minimum free area through the trap shall equaltwice the area of the outlet exhaust line.5.4 Hand HoleThe hand hole shall be configured asindicated in Fig.1.6.Dimensions6.1 The dimensions in Fig.1 are recommended nominaldimensions.7.Workmanship,Finish,and Appearance7.1 Workmanship on traps and piping shall be of sufficientquality to prevent dirt accumulation.Welding shall have small,even beading,free of slag and spatter.7.2 The trap shall be free of paint.8.Test Method8.1 Each trap shall be pneumatically proof tested 35 kPa(5psi)with no visible seam leakage.9.Packaging9.1 The water traps shall be crated or packaged individuallyfor shipment by a commercial common carrier.9.1.1 Talc and talcum used in the packaging process ofitems shall be free of asbestos and asbestiform-like materials.10.Marking10.1 Each water trap shall bear a weathertight tag showingthe purchase order number,ASTM designation,size,and nameof manufacturer.The markings on the package shall beapproximately 25.4 m