JCM Fabricated Expansion Joints
JCM Expansion Joints permit up to 10” of concentrated pipe movement that provides for normal expansion/contraction of pipelines subject to variations of both environmental and line content temperatures. JCM Expansion Joints are manufactured using a telescoping design that consists of a fabricated steel body, or housing, that accommodates an inserted internal “slip pipe” that moves in and out of the body. This free movement absorbs the linear, or axial, movement of the section of pipe. The fabricated steel body houses a “packing” area of alternating rings of lubricated flax and rubber that provides the water tight seal during the cycling of the joint. JCM Expansion Joints offer several design options including end connections, coatings, limit rods, stainless steel fabrication and others. JCM Expansion Joints are manufactured for each specific application allowing for the incorporation of special options or engineered features required for the installation.
Heavy Duty Construction - The heavy duty, durable exterior body provides the protective shell for the slip pipe and packing system. For corrosive or acidic environments, the expansion joint may be epoxy coated or fabricated of stainless steel. Externally Guided Slip Pipe - The machined slip pipe furnishes a hard, corrosion resistant surface that reduces friction between the slip pipe and packing material. For corrosive environments or line contents, slip pipe is fabricated of stainless steel. Adjustable Packing Gland - Alternating rings of lubricated flax and rubber are packed tightly into the packing area of the body by the adjustable packing gland. This packing gland maintains a consistent compression of the flax/rubber rings to ensure a tight, leak proof seal between the slip pipe and body. Lubricated Packing - The rings of lubricated flax provide the “lubrication” to the slip pipe ensuring a smooth expanding/contracting movement while the square rubber rings secure the water tight seal. This packing area is easily accessible, without disruption of service, should repacking be required.
How to Order - For price and availability, the following informaiton must be furnished
Type of pipe Outside diameter of pipe Type of End Connections Line Contents Minimum and maximum temperatures Maximum working pressure Material and Coating specifications
JCM 802 Double End Expansion Joints are designed for special applications such as middle of line use where expansion joint body can be anchored. This fitting permits up to 10” total pipe movement, 5” on each end, with properly anchored body.
Material Specifications
Body Material: Body Flange: Slip Pipe: Packing Gland: Gasket and Flax:
ASTM A36 Carbon Steel or equal
ASTM A36 or equal 18-8 Type 304 Stainless Steel per ANSI/AWWA C220, as applicable. ASTM A36, ASTM A285 Grade C, ASTM A53B or equal.
Square packing Buna-N rubber, per ASTM D2000, 55 - 60 durometer, compounded for use with water, salt solutions, mild acids, bases and sewage. Flax: Gurlock waxed, braided cord (hemp).
Bolts: Limit Rods: Finish:
ASTM A193 B7, ASTM A194/ASTM A563 or Stainless Steel ASTM A193 B8/B8M, ASTM A193 B8/B8M/B7 or equal.
Heavy coat of corrosion resistant primer.
Meets or exceeds ANSI/AWWA C221 Fabricated Steel Mechanical Slip-Type Expansion Joints
101
Price List Effective February 3, 2025. Cancels all previous prices. Prices are subject to change without notice. 800.527.8482 sales@jcmindustries.com jcmindustries.com
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