§154.528. Piping joints: Flange type.

46 C.F.R. § 154.528

(a)

A flange must be one of the following types:

(1)

Welding neck.

(2)

Slip-on.

(3)

Socket weld.

(b)

If the piping is designed for a temperature between −10 °C (14 °F) and −55 °C (−67 °F), the pipe flange may be a:

(1)

Slip-on type, if the nominal pipe size is 100 mm (4 in.) or less;

(2)

Socket weld, if the nominal pipe size is 50 mm (2 in.) or less; or

(3)

Welding neck.

(c)

If the piping is designed for a temperature lower than −55 °C (−67 °F), the pipe flange must be a welding neck type.

Notes, amendments, and revision history

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.