Dresser Style 31 Line Caps are used to close off sections of a pipeline during construction and testing, and to cap off dead-ends in the line for future branch connections. Style 31 Line Caps are made from Style 38 Dresser coupling parts with a convex steel dished head welded into one end of the middle ring. One follower ring is welded to the cap itself, and only one gasket is required. The Style 31 is regularly supplied with a 1 NPT vent and plug off-center. When ordering, please specify whether vent is to be provided. The Dresser Style 31 Line Cap is also available in an insulating design with insulating gasket, insulating sleeve and pipe-end separator.

Style 31 Dresser Spec Sheet

• Followers : AISI C1012 or ASME SA36 (Ductile Iron or Malleable Iron for 1/2 thru 1-1/2)
• Middle Ring : ASTM A513 ASTM A635 or ASME SA675 GR60
• Bolts : AWWA C 111/ANSI A21.11
• Gasket : Grade 27 BUNA S (Armored)
• Coating : Fusion-Bonded Epoxy