RUBBER EXPANSION JOINTS, RUBBER EXPANSION BELLOWS

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Ami Polymer Pvt.Ltd. is pioneer in Rubber Expansion Bellows. Ami's Rubber Expansion Bellows are designed to take care of reactional forces like Thermal Expansion, Contraction, vibrationsetc, which otherwise break pipelines. These Rubber Expansion Joints are made up of Neoprene, EPDM, Silicone, Viton and also in Natural Rubber etc, Ami's Rubber Expansion Bellows are reinforced with specially treated Nylon, Rayon,Glass Fiber, Fiber, Steel Cord etc, by taking care of the designing for perfect balance between movements of Axial, Radial, Torsion and Angular and pressure bearing capacity. Ami's Rubber Expansion Bellows are available in sizes ranging from 1" NB to 72" NB with hydro testing upto 24-bar pressure. These bellows are either integrated flange (metallic flanges are bonded with rubber) or split back-up flanges, and are made strictly as per the customer's design, drawing and specification.

Ami's Expansion Joints are designed to alleviate stresses caused by thermal expansion and contraction in piping systems, noise and vibration. Their flexibility permits connecting misaligned piping resulting from worn parts, foundat- ions settling and operation of system and mechanical equipment. Ami's Expansion Joints offer many user benefits over conventional metal connectors. They are non-corrosive, do not require gaskets, will not fatigue, requires small space, permit axial, lateral and angular movement, shock resistant, do not become brittle and eliminate electrolytic action.

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TYPE OF MOVEMENTS

Axial compression : Reduction of face-to-face dimension Measured along the axis.
Axial elongation : Increase of face-to-face dimension Measured along the axis.
Transverse or lateral : The movement of the joint Perpendicular to the axis.


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CONSTRUCTION DETAILS
Ami's Expansion Joints are made in different types, such as Standard Single, Multiple Arch, Light Weight type and others suitable for special application. The construction of the Expansion Joints consist of a tube, body or carcass and a cover.

TUBE - The Tube is a protective, leak proof lining of Natural or Synthetic Rubber.

BODY : The body consists of Fabric and various Rubber Compounds reinforced with steelrings for strength. High quality synthetic fabric is used for standard joints for temperatures range upto 80 o C For temperature beyond 80 o C and upto 120 o C subjected to Pressure and / or Vacuum, Butyl Rubber with synthetic fabric is used in the construction of Expansion Joints.

COVER : The 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

FLANGES - Ami's Expansion Joint flanges are made of Rubber construction to resist stresses and to form a tight seal with companion pipe without need for gaskets. Flanges are normally full-face with 150 # ANSI standard drilling. Also can make with 250 # ANSI or to Party's specifications. Ami's Expansion Joint arches may be filled with a soft-rubber filler to prevent settling of solids from solutions being conveyed. (if filled, all movements are reduced by 50 percent).

MATERIALS - Ami's Expansion Joints are available in Natural Rubber, Chloroprene, Hypalon and Nitrile for temperatures up to 80 o C. Also available in Butyl for temperatures up to120 o C.

Ami's Expansion Joints are manufactured with Cotton / Nylon fabrics and G.I./S.S. Wire. Galvanized split steel retaining rings should be installed on all Ami's Expansion Joints. These are placed directly against the inside of the flange to prevent damage to the rubber surface when bolts are tightened and also to provide equal distribution of bolting stresses. They are split in 2 or 4 sections - depending on joint size - and are drilled to match rubber flange holes.

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CONTROL UNITS

Ami's Control units consist of two or more control rod assemblies extending from flange toflange of the Expansion Joint to minimize possible damage to the Expansion Joint caused by excessive movement of the pipeline. The control units are set at the maximum allowable expansion 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 rods. The length of the pipe sleeve is such that the Expansion Joint cannot be compressed beyond maximum allowable compression stated in chart (Page).

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ANCHORING

It is absolutely necessary that rigid metal pipe on both ends of the connector be properly anchored to eliminate the danger of excessive elongation. Anchors should be provided at: 1. Change in pipe size 2. A branching of pipe 3. A change of pipe direction 4. The end of a pipe run An expansion joint should never be used to support the piping.

DIMENSIONS - SINGLE AND MULTIPLE ARCH (INCHES)
Size A B C D E F G H I Bolt
Circlr
Diam		 No of
Bolts 		Bolt
Diam		 Drilled
Hole
Diam		 Apprx
Weight
(L.B.S)
1 4-1/4 1 5/8 6 3 9/16 1/2 7/16 1-1/18 3-1/8 4 1/2 5/8 2
1-1/4 4-5/8 1-1/4 5/8 6 3 9/16 1/2 7/16 1-1/18 3-1/2 4 1/2 5/8 2-1/2
1-1/2 5/8 1-1/2 5/8 6 3 9/16 1/2 7/16 1-1/18 3-7/8 4 1/2 5/8 3
2 6 2 3/4 6 3 9/16 1/2 1/2 1-1/4 4-3/4 4 5/8 3/4 4
2-1/2 7 2-1/2 3/4 6 3 9/16 1/2 1/2 1-1/4 5-1/2 4 5/8 3/4 4-1/2
3 7-1/2 3 3/4 6 3 9/16 1/2 1/2 1-1/4 6 4 5/8 3/4 5-1/4
4 9 4 7/8 6 3 9/16 1/2 1/2 1-1/4 7-1/2 8 5/8 3/4 7
5 10 5 7/8 6 3 9/16 1/2 1/2 1-1/4 8-1/2 8 3/4 7/8 8-1/4
6 11 6 7/8 6 3 5/8 1/2 1/2 1-1/4 9-1/2 8 3/4 7/8 9-3/4
8 13-1/2 8 7/8 6 3 3/4 3/4 5/8 1-1/2 11-3/4 8 3/4 7/8 15
10 16 10 1 8 4 3/4 3/4 11/16 1-1/2 14-1/4 12 7/8 1 21
12 19 12 1-3/16 8 4 3/4 3/4 11/16 1-1/2 17 12 7/8 1 28
14 21 14 1-3/16 8 4 7/8 3/4 3/4 2 18-3/4 12 7/8 1-1/8 39
16 23=1/2 16 1-3/16 8 4 7/8 3/4 3/4 2 21-1/4 16 1 1-1/8 45-1/2
18 25 18 1-3/16 8 4 7/8 3/4 3/4 2 22=3/4 16 1 1-1/4 50-1/2
20 27-1/2 20 1-1/4 8 4 1 7/8 25/32 2 25 20 1-1/8 1-1/4 61
22 29-1/2 22 1-1/4 10 5 1 7/8 25/32 2 27-1/4 20 1-1/8 1-3/8 70
24 32 24 1-14 10 5 1 7/8 25/32 2 29-1/2 20 1-1/4 1-3/8 75
26 34-1/4 26 1-3/8 10 5 1 1 13/16 2-1/4 31-3/4 24 1-1/4 1-3/8 85-1/2
28 36-1/2 28 1-3/8 10 5 1 1 13/16 2-1/4 34 28 1-1/4 1-3/8 93
30 38-3/4 30 1-3/8 10 5 1 1 13/16 2-1/4 36 28 1-1/4 1-3/8 101-1/2
36 46 36 1-3/8 10 5 1 1 13/16 2-1/4 42-3/4 32 1-1/2 1-5/8 137-1/2
42 53 42 1-1/2 12 6 1-3/16 1-1/8 29/32 2-1/2 49-1/2 36 1-1/2 1-5/8 182-1/2
48 59-1/2 48 1-1/2 12 6 1-3/16 1-1/8 29/32 2-1/2 56 44 1-1/2 1-5/8 211
54 66-1/4 54 1-1/2 12 6 1-3/16 1-1/8 29/32 2-1/2 62-3/4 44 1-3/4 2 265-1/2
60 73 60 1-1/2 12 6 1-3/16 1-1/8 29/32 2-1/2 69-1/4 52 1-3/4 2 309
72 86-1/2 72 1-1/2 12 6 1-3/16 1-1/8 29/32 2-1/2 82-1/2 60 1-3/4 2 385
78 93 78 1-1/2 12 6 1-3/16 1-1/8 29/32 2-1/2 88-3/4 60 2 2-1/4 410
84 99-3/4 84 1-1/2 12 6 1-3/16 1-1/8 29/32 2-1/2 95-1/2 64 2 2-1/4 480

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TYPE OF EXPANSION JOINTS
STANDARD - Single arch for use where initial misalignment of two pipes to be connected does not exceed 1/8" but not where flanges are out of paral. Available for pressure vacuum. Arch can be filled, however, movement limitations are reduced 50%

MULTIPLE ARCHES - Standard joint with 2 or 3 arches. Recommended for greater movement where face-to-face dimensions are not limited. Suitable for pressure or vacuum applications with flanges or sleeve ends.

LIGHT WEIGHT - Recommended for handling air, liquid, gases and fumes at 7.5 (15" vacuum absolute) to 15 psi. Available with multiple arches, filled arches and sleeve ends.

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RETAINING RINGS
Use of split-steel rings assure a pressure-tight seal. Outside diameter is same as standard flange and contains the same number of boltholes. Those used on joint sizes up to 40" are two-piece (4 segments per joint). Four-piece rings (8 segments per joint) are used on all larger sizes. All are generally 3/8" thick.

JOINT SIZE NO. OF BOLTS BOLT DIAM JOINT SIZE NO. OF BOLTS BOLTS DIAM.
1-3 4 5/8 24 20 1-1/4
4 8 5/8 30 28 1-1/4
5-8 8 3/4 36 32 1-1/2
10-12 12 7/8 42 36 1-1/2
14 12 1 48 44 1-1/2
16 16 1 54 44 1-3/4
18 16 1-1/8 60 52 1-3/4
20 20 1-1/8 72 60 1-3/4

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AMI POLYMER'S EXPANSION JOINTS (STANDARD)

Single arch suitable for pressure, vacuum and pressure / vacuum services at temperatures to80°C. Special construction for 80°C - 120°C services is available. A seamless leak proofliner extending through bore to outside flange edges eliminates the possibility of service materials penetratingcarcass and weakening fabric. Expansion joints are available to any required - specifications.

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AMI POLYMER'S EXPANSION JOINTS (MULTIPLE)

These Expansion Joints are made with two or more arches for use where desired movement exceeds single arch joint capability. The Construction characteristics and materials are the same as that of single arch joints and service ratings are identical. Limits of movement are determined by multiplying single arch movement by number of arches. Minimum face-to-face dimension is dependent upon number of arches. When installed horizontally, a maximum off our (4) arches is recommended.

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10 8 11/16 3/8 1/2 12 1-3/8 3/4 1
12 8 11/16 3/8 1/2 12 1-3/8 3/4 1
14 8 11/16 3/8 1/2 12 1-3/8 3/4 1
16 8 11/16 3/8 1/2 12 1-3/8 3/4 1
18 8 11/16 3/8 1/2 12 1-3/8 3/4 1
20 8 13/16 7/16 1/2 12 1-5/8 7/8 1
24 10 13/16 7/16 1/2 14 1-5/8 7/8 1
30 10 15/16 1/2 1/2 14 1-7/8 1 1
36 10 15/16 1/2 1/2 14 1-7/8 1 1
42 12 1 9/16 1/2 14 2 1-1/8 1
48 12 1 9/16 1/2 14 2 1-1/8 1
54 12 1 9/16 1/2 14 2 1-1/8 1
60 12 1 9/16 1/2 14 2 1-1/8 1
72 12 1 9/16 1/2 14 2 1-1/8 1

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