F 681 – 82 Derivaciones en cañerías.pdf | Pipe (Fluid Conveyance) | Patent

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  Ships and Marine Technology
  Designation: F 681 – 82 (Reapproved 1998)  An American National Standard Standard Practice for Use of Branch Connections 1 This standard is issued under the fixed designation F 681; the number immediately following the designation indicates the year of srcinal adoption or, in the case of revision, the year 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. Scope 1.1 This practice lists commonly used 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 Subparts56.07-10(f) and 56.70-15(g) of the USCG Regulations. 2. Referenced Documents 2.1  ASTM Standards: F 722 Specification for Welded Joints for Shipboard PipingSystems 2 2.2  ANSI Standard: B31.1 Power Piping 3 2.3  Other Document: Title 46 Code of Federal Regulations (CFR) Shipping, Parts41 to 69 4 3. General Requirements 3.1 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 ofANSI B31.1 as modifiedby Title 46, CFR Subparts 56.07-10(f) and 56.70-15(g) of theUSCG regulations.3.3 Threaded fittings shall be subject to the limitations of Title 46 CFR, Subpart 56.30-20 of the USCG Regulations. 4. Keywords 4.1 branch connnections; carbon steel connections;chromium-molybdenum steel pipe; copper-nickel alloy tubing 1 This 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 July 30, 1982. Published October 1982. Originallypublished as F 681 – 80. Last previous edition F 681 – 80. 2  Annual Book of ASTM Standards , Vol 01.07. 3 Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036. 4 Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. 1 Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.  TABLE 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) F 681 – 82 (1998) 2  TABLE 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) F 681 – 82 (1998) 3  TABLE 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 (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 (1998) 4
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