RUBBER EXPANSION JOINTS

Pump controlled Auto Pressurized Expansion A rubber expansion joint with full face flange eliminates the need for additional gaskets when installing the joint. The rubber flange are drilled to made with pipe line flanges (ANSI). These types of rubber joints are typically available with a single bellow double, or triple bellow to meet the face to face and movement requirements of the installation.

Rubber expansion bellow are designed to take care of reactional forces like thermal expansion, contraction rib rationeset, which otherwise break pipe line. These rubber expansion joints are made up of Neoprene, EPDM, Silicon and also Natural rubber etc., Emerald rubber expansion bellow are reinforced with specially treated Nylon, Rayon, Glass fibre steel cord etc. EMERALD ENTERPRISES RUBBER EXPANSION are available in sizes ranging from 20mm to 600mm NB with hydro testing up to 32kg/cm² pressure actual testing. These bellow are either integrated flanged or split back up flanges, and are made strictly as per the customer design, drawing and specification.

Type of movements :

Construction details:

Body:

The body consists of fabric and various rubber compound reinforced with steel rings for better strength. High quality synthetic fabric is used for standard joint for temperature range up to 80°C to temperature beyond 80°C and upto 120°C subjected to pressure and/or vacuum. Butyl rubber with synthetic fabric is used in construction of expansion joints. Expansion joint cover is formed from Natural or synthetic rubber selected to suit service conditions. A special Hypalon paint is used to coat the cover for protection against occasional contact with oil and to resist weathering, Ozone and corrosive fumes.

Metal Flange: EMERALD RUBBER EXPANSION

Flanges are normally full face with drilling standards BS 10-2009, ANSI B16.5:1996 BS 4504.3.1:1989, IS 6392:1971, IS0-7005-1:1992(E) EN 1092-2:1997 Table D, Table E & PN STANDARDS.

Material: EMERALD RUBBER EXPANSION

Expansion joints are available in natural rubber, chloroprene, Hypalon & Nitrile for temperatures up to 80°C also available in Butyl for temperatures up to 120°C. EMERALD RUBBER EXPANSION joints are manufactured with cotton/Nylon fabrics and G.I/S.S wire. Galvanized split steel retaining rings should be installed inside flanges.

These are placed directly against the inside of the flanges to prevent damage to the rubber surface when bolts are tightened and also to provide equal distribution of bolting stresses. They are split into 2 or 4 section. Depending on joint size and are drilled to match rubber flange holes.

Control units: EMERALD RUBBER EXPANSION

Control units consist of two or more control rod assemblies extending across flanges of expansion joint to minimise possible damage to the expansion joint caused by excessive movement of the pipe line. The control units are set at the maximum allowable compression of the joint and will absorb the static pressure thrust developed at the expansion joint over compression of the expansion joints can be controlled by installing rubber pipe sleeves over the tie rod. The length of the pipe sleeves is such that the expansion joint cannot be compressed beyond maximum allowable compression stated in the chart.

Quality control Testing:

Applications: