J10 pages

J-1 Expansion Joints
Ǡ Single, or multiple arches available
Ǡ Full face integral flanges, no gaskets
necessary
Ǡ Sizes 1” to 108”
Ǡ Heavy-duty, steel wire reinforced construction
Ǡ Made in U.S.A.

Materials of Construction
Ǡ ELASTOMERS
Pure Gum Rubber, Neoprene, Hypalon®,
Chlorobutyl, Buna-N, EPDM, and Viton®

ANSI
125# Flange

Steel Wire
Reinforcing

The J-1 Expansion Joint is the most common type of joint
used to compensate for pipeline movement and vibration.
The construction of the J-1 is very much like a heavy-duty
truck tire: layers of high-quality elastomers are reinforced
with steel wires and synthetic fabrics. The inner layer forms
a tube that extends through the inside of the joint, and across
the face of the end flanges. This layer is chosen based on its
chemical compatibility and abrasion resistance and temperature rating to the process material. The middle layer of the
joint contains the bias-ply synthetic fabric reinforcement
that gives the joint its form and pressure rating, and a layer(s)
of wire reinforcement for added strength. The outer layer of
the joint is chosen to be compatible with the environment in
which the joint is to be installed, usually Neoprene or Butyl.
This allows the joint to stand up to occasional contact with
oils, corrosion, and weathering.
The J-1 features full-face integral flanges that eliminate the
need for additional gaskets when installing the joint. The
flanges are drilled to mate with ANSI 125/150 flanges, with
special drilling available upon request. Galvanized or stainless steel retaining rings can be provided to protect the
flange and distribute forces evenly. Redflex® J-1 Joints can
also be manufactured to meet Coast Guard and Military
standards as well.
J-1 Expansion Joints are available with a single arch, double
arches, or triple arches to meet the face-to-face and movement requirements of the installation. The arches, along
with the flexibility of the elastomer construction, allows
the J-1 to provide stress relief in piping systems due to the
thermal expansion and contraction, and mechanical movements and vibration.

Cover
Fabric
Reinforcing
Split Retaining
Ring

Tube

Specifications for J-1 Expansion Joint
The Expansion Joint shall consist of an inner tube, body, and outer cover, and shall have flanged ends. The tube shall
be natural rubber or synthetic material as specified in the Purchase Order. The body shall consist of fabric and rubber
compounds reinforced with steel wire for strength. The body materials shall be compatible with the tube and shall be
suitable for the specified service conditions. The cover shall be formed from natural or synthetic rubber suitable to
external service to resist weather, ozone, and corrosive fumes. Flanges shall be constructed integrally with the body to
resist stresses. Flanges shall be full-pattern so that gaskets are not necessary. Flanges shall be drilled to ANSI B 16.5,
Class 150#, or as specified in the Purchase Order. The Expansion Joint shall be available with a single arch or multiple
arches, and open arch or filled arch construction. Joint shall be manufactured in the U.S.A., and manufacturer must be
a member of the Fluid Sealing Association.
All Expansion Joints shall be Redflex Type J-1 as manufactured by the Red Valve Company, Inc. of Carnegie, PA 15106.