1、Designation: F 681 82 (Reapproved 2004)An American National StandardStandard Practice forUse of Branch Connections1This standard is issued under the fixed designation F 681; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This practice lists commonly used
3、 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 Subpa
4、rts56.07-10(f) and 56.70-15(g) of the USCG Regulations.2. Referenced Documents2.1 ASTM Standards:2F 722 Specification for Welded Joints for Shipboard PipingSystems2.2 ANSI Standard:3B31.1 Power Piping2.3 Other Document:Title 46 Code of Federal Regulations (CFR) Shipping, Parts41 to 6943. General Req
5、uirements3.1 Weld joint designs shall be in accordance with Specifi-cation F 722 and the limitations therein.3.2 Fabricated branch connections shall meet the reinforce-ment requirements of Section 104.3 of ANSI 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 Nov. 1, 2004. Published November 2004. Originallyapproved in 1980. Last previous edition approved in 1998 as F 681 82 (1998).2For referenced ASTM standards,
8、 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. 43rd St.,4th Floor, New
9、York, NY 10036.4Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.TABLE 1 Branch Connection Matrix for Ca
10、rbon 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)F 681 82 (2004)2TABLE 2 Branch Connection Matrix for Chrome Moly PipingLEG
11、END (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)F 681 82 (2004)3TABLE 3 Branch Connection Matrix for Copper Nickel PipingLEGEND (see Fig. 1)1 = Tee or lateral (butt w
12、eld)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)F 681 82 (2004)4ASTM International takes no position respecting the validity of any patent rights asserted in co
13、nnection 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 responsibility.This standard is subject to revision at any time by the respo
14、nsible 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 ASTM International Headquarters. Your comments will receive careful
15、 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 shown below.This standard is copyrighted by ASTM International,
16、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. 1 Illustrative Legend for Branch ConnectionsF 681 82 (2004)5
