1、Designation: F681 82 (Reapproved 2018) An American National StandardStandard Practice forUse of Branch Connections1This standard is issued under the fixed designation F681; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year o
2、f last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This practice lists commonly u
3、sed types of branchconnections for carbon steel, chromium-molybdenum steelpipe and copper-nickel alloy tubing. Branch to run sizeapplications are given in Table 1, Table 2, and Table 3. Othertypes of branch connections (Fig. 1) may be used provided theycomply with the requirements of Title 46 CFR Su
4、bparts56.07-10(f) and 56.70-15(g) of the USCG Regulations.1.2 The values stated in inch-pound units are to be regardedas standard. No other units of measurement are included in thisstandard.1.3 This international standard was developed in accor-dance with internationally recognized principles on sta
5、ndard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2F722 Specification for Welded Joints for Shi
6、pboard PipingSystems2.2 ASME Standard:3B31.1 Power Piping2.3 Other Document:4Title 46 Code of Federal Regulations (CFR) Shipping, Parts41 to 693. General Requirements3.1 Weld joint designs shall be in accordance with Specifi-cation F722 and the limitations therein.3.2 Fabricated branch connections s
7、hall meet the reinforce-ment requirements of Section 104.3 of ASME B31.1 asmodified by Title 46, CFR Subparts 56.07-10(f) and 56.70-15(g) of the USCG regulations.3.3 Threaded fittings shall be subject to the limitations ofTitle 46 CFR, Subpart 56.30-20 of the USCG Regulations.4. Keywords4.1 branch c
8、onnnections; carbon steel connections;chromium-molybdenum steel pipe; copper-nickel alloy tubing1This practice is under the jurisdiction of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved
9、 Sept. 1, 2018. Published September 2018. Originallyapproved in 1980. Last previous edition approved in 2014 as F681 82 (2014).DOI: 10.1520/F0681-82R18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMSta
10、ndards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Two Park Ave., New York, NY 10016-5990, http:/www.asme.org.4Available from DLA Document Services, Building 4/D,
11、700 Robbins Ave.,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardizati
12、on established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1TABLE 1 Branch Connection Matrix for Carbon Steel PipingLEGEND (see Fig. 1)1 = Tee or lateral (bu
13、tt weld)2 = Tee or lateral (socket weld or threaded)3 = Welded outlet (butt weld end)4 = Welded outlet (socket weld or threaded end)5 = Fabricated joint (cut-in branch)F681 82 (2018)2TABLE 2 Branch Connection Matrix for Chrome Moly PipingLEGEND (see Fig. 1)1 = Tee or lateral (butt weld)2 = Tee or la
14、teral (socket weld)3 = Welded outlet (butt weld end)4 = Welded outlet (socket weld end)5 = Fabricated joint (cut-in branch)F681 82 (2018)3TABLE 3 Branch Connection Matrix for Copper Nickel PipingLEGEND (see Fig. 1)1 = Tee or lateral (butt weld)2 = Tee or lateral (silver brazed)3 = Welded outlet (but
15、t weld end)4 = Welded outlet (silver brazed end)5 = Fabricated joint (cut-in branch)6 = Silver brazed outlet (silver brazed end)F681 82 (2018)4ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of th
16、is standard are expressly advised that determination of the validity 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 ye
17、ars andif not revised, either reapproved or withdrawn. Your comments 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 commi
18、ttee, which you may attend. If you feel that your comments have 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 194
19、28-2959,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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Illustrative Legend for Branch ConnectionsF681 82 (2018)5
