1、Designation: F 991M 04 (Reapproved 2008)An American National StandardStandard Specification forDocking/Drain Plug and Boss Assemblies Metric1This standard is issued under the fixed designation F 991M; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、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 provides design, construction, andpurchasing criteria for docking/dra
3、in plug and boss assemblies.1.2 Assemblies are intended for installation in shell, rudder,and tank bottom plate from 8 through 38 mm.1.3 Assemblies shall be installed at the lowest point of atank or rudder for draining during dry docking.1.4 The values stated in SI units are to be regarded as thesta
4、ndard.2. Referenced Documents2.1 ASTM Standards:2B 164 Specification for Nickel-Copper Alloy Rod, Bar, andWire2.2 Other Documents:ABS Rules for Building and Classing Steel Vessels3ANSI B2.1 Standard Pipe Threads Except Dryseal43. Classification3.1 Docking plugs and bosses shall be classified as foll
5、ows:3.1.1 Type IDocking plug and bosses for plating from 8 to15 mm (see Fig. 1).3.1.2 Type IIDocking plug and bosses for plating greaterthan 15 to 38 mm (see Fig. 2).4. Ordering Information4.1 Orders for material under this specification shall includethe following:4.1.1 ASTM designation and year of
6、issue.4.1.2 Type (See Section 3).4.1.3 Optional nonstandard materials.5. Materials and Manufacture5.1 Materials:5.1.1 BossABS Grade A or B, plate or bar.5.1.2 PlugSpecification B 164 rod or bar.5.1.3 Other materials may be substituted to suit hull con-struction as approved by regulatory bodies.5.2 M
7、anufacture:5.2.1 Plugs and bosses shall be machined.5.2.2 Threads shall be in accordance with ANSI B2.1.6. Dimensions and Tolerances6.1 Dimensions shall be as indicated in Fig. 1 and Fig. 2.6.2 Tolerance shall be 61.5 mm.6.3 Mass shall be as follows:Type I Type IIBoss 1.6 kg 5.7 kgPlug 0.6 kg 1.0 kg
8、Total 2.2 kg 6.7 kg7. Installation7.1 All welding shall be to the standards of the Rules forBuilding and Classing of Steel Vessels (ABS).7.2 Threads shall be adequately protected during installa-tion.7.3 Fill plug face with portland cement or other suitablecompound and finish flush with face of boss
9、.7.4 Boss shall be inserted so that drain grooves run forwardand aft.7.5 Plugs shall not be installed near large structural discon-tinuities.7.6 Adjacent shell plating weld joint preparation shall be asrequired to ensure full penetration.8. Keywords8.1 boss assemblies; docking/drain plug; drydocking
10、; rud-der; shell; tank bottom plate1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.01 onStructures.Current edition approved Nov. 1, 2008. Published December 2008. Originallyapproved in 1986. Last p
11、revious edition approved in 2004 as F 991M 04.2For 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
12、 American Bureau of Shipping (ABS), ABS Plaza, 16855Northchase Dr., Houston, TX 77060, http:/www.eagle.org.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700,
13、 West Conshohocken, PA 19428-2959, United States.FIG. 1 Type IF 991M 04 (2008)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the vali
14、dity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comm
15、ents are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have
16、not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. 2 Type IIF 991M 04 (2008)3
