ASTM F681 - 82(2008)

    Standard Practice for Use of Branch Connections

    Active Standard ASTM F681 | Developed by Subcommittee: F25.11

    Book of Standards Volume: 01.07


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    Abstract

    This practice lists commonly used types of branch connections for carbon steel, chromium-molybdenum steel pipe and copper-nickel alloy tubing. The branch to run size applications are presented in details. The weld joint designs, fabricated branch connections and threaded fittings shall meet the requirements prescribed.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This practice lists commonly used types of branch connections for carbon steel, chromium-molybdenum steel pipe and copper-nickel alloy tubing. Branch to run size applications are given in Table 1, Table 2, and Table 3. Other types of branch connections (Fig. 1) may be used provided they comply with the requirements of Title 46 CFR Subparts 56.07-10(f) and 56.70-15(g) of the USCG Regulations.

    TABLE 1 Branch Connection Matrix for Carbon Steel Piping
    LEGEND (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)

    TABLE 2 Branch Connection Matrix for Chrome Moly Piping
    LEGEND (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)

    TABLE 3 Branch Connection Matrix for Copper Nickel Piping
    LEGEND (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)


    FIG. 1 Illustrative Legend for Branch Connections


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    F722 Specification for Welded Joints for Shipboard Piping Systems

    ANSI Standard

    B31.1 Power Piping

    Other Document

    Title46 Code of Federal Regulations (CFR) Shipping, Parts 41 to 69


    ICS Code

    ICS Number Code 47.020.60 (Electrical equipment for ships or marine structures)

    UNSPSC Code

    UNSPSC Code 11101704(Steel); 11101711(Non ferrous alloy)


    DOI: 10.1520/F0681-82R08

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