ASTM F681-82(2008)
Standard Practice for Use of Branch Connections

Standard No.

ASTM F681-82(2008)

Release Date

1982

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM F681-82(2014)

Latest

ASTM F681-82(2022)

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

ASTM F681-82(2008) history

• 2022 ASTM F681-82(2022) Standard Practice for Use of Branch Connections
• 2018 ASTM F681-82(2018) Standard Practice for Use of Branch Connections
• 1982 ASTM F681-82(2014) Standard Practice for Use of Branch Connections
• 1982 ASTM F681-82(2008) Standard Practice for Use of Branch Connections
• 1982 ASTM F681-82(2004) Standard Practice for Use of Branch Connections
• 1982 ASTM F681-82(1998) Standard Practice for Use of Branch Connections