1、Designation: F681 82 (Reapproved 2014) 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.2. Referenced Documents2.1 ASTM Standards:2F722 Specification for Welded Joints for Shipboard PipingSystems2.2 ANSI Standard:3B31.1 Power Piping2.3 Other Document:4Title 46 Code of Federal Regulations (CFR) Shipping, Parts41 to 693. General R
5、equirements3.1 Weld joint designs shall be in accordance with Specifi-cation F722 and the limitations therein.3.2 Fabricated branch connections shall meet the reinforce-ment requirements of Section 104.3 ofANSI B31.1 as modifiedby Title 46, CFR Subparts 56.07-10(f) and 56.70-15(g) of theUSCG regulat
6、ions.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 connnections; carbon steel connections;chromium-molybdenum steel pipe; copper-nickel alloy tubing1This practice is under the jurisdiction of ASTM Committee F2
7、5 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved Aug. 1, 2014. Published September 2014. Originallyapproved in 1980. Last previous edition approved in 2008 as F681 82 (2008).DOI: 10.1520/F0681-82R14.2For r
8、eferenced 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 American National Standards Institute (ANSI), 25 W.
9、 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, P
10、A 19428-2959. United States1TABLE 1 Branch Connection Matrix for Carbon Steel PipingLEGEND (see Fig. 1)1 = Tee or lateral (butt 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
11、 (2014)2TABLE 2 Branch Connection Matrix for Chrome Moly PipingLEGEND (see Fig. 1)1 = Tee or lateral (butt weld)2 = Tee or lateral (socket weld)3 = Welded outlet (butt weld end)4 = Welded outlet (socket weld end)5 = Fabricated joint (cut-in branch)F681 82 (2014)3TABLE 3 Branch Connection Matrix for
12、Copper Nickel PipingLEGEND (see Fig. 1)1 = Tee or lateral (butt weld)2 = Tee or lateral (silver brazed)3 = Welded outlet (butt weld end)4 = Welded outlet (silver brazed end)5 = Fabricated joint (cut-in branch)6 = Silver brazed outlet (silver brazed end)F681 82 (2014)4ASTM International takes no posi
13、tion 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 validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibili
14、ty.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 comments are invited either for revision of this standard or for additional standardsand should be addressed to AST
15、M 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 not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address
16、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-
17、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 (2014)5
