Rubber Flexible Expansion Joints Absorb Movements and Reduce Noise

A single sphere rubber expansion joint on white background.

Rubber flexible joint is lightweight but versatile.

Rubber flexible joints, also called rubber elastomer joints, is constructed of neoprene and nylon with internal and stainless steel rings external structures.

It can provide superior performance in absorbing movement and reducing mechanical noise, reliability and long service life. All result in improved plant safety and increased mechanical integrity of equipment.

The rubber flexible expansion joints are inserted in a rigid piping system for following functions:

  • Absorb and relieve movement stresses.
  • Reduce mechanical noise.
  • Improve thermal stability.
  • Generate horizontal, axial and angular displacement. And isolate vibration.
  • Compensate for misalignment.
  • Relieve system strain due to thermal change, load stress, pumping surges, wear of settling.
  • Eliminate electrolysis between dissimilar metals.

Structures of rubber flexible joint

Single and double type rubber flexible joint and their drawings.

Types and drawings of rubber flexible joint.

Technical Parameters of rubber flexible joint
Nominal Diameter Length Flange Thickness Bolt No. Bolt Diameter Bolt Circle Diameter (D1) Axial Movement Lateral Movement Deflection Angle
Extension Compression
mm inch mm mm n mm mm mm mm mm a1 + a2
32 1.25 95 16 4 18 100 6 9 9
40 1.5 95 18 4 18 110 6 10 9 15
50 2 105 18 4 18 125 7 10 10 15
65 2.5 115 20 4 18 145 7 13 11 15
80 3 135 20 4 18 160 8 15 12 15
100 4 150 22 8 18 180 10 19 13 15
125 5 165 24 8 18 210 12 19 13 15
150 6 180 24 8 23 240 12 20 14 15
200 8 210 24 8 23 295 16 25 22 15
250 10 230 26 12 23 350 16 25 22 15
300 12 245 28 12 23 400 16 25 22 15
350 14 255 28 16 23 460 16 25 22 15
400 16 255 30 16 25 515 16 25 22 15
450 18 255 30 20 25 565 16 25 22 15
500 20 255 32 20 25 620 6 25 22 15
600 24 260 36 20 30 725 6 25 22 15
700 28 260 36 24 30 840 16 25 22 15
800 32 260 38 24 34 950 16 25 22 15
900 36 260 42 28 34 1050 6 25 22 15
1000 40 260 44 28 34 1160 18 26 24 15
1200 48 260 48 32 41 1380 18 26 24 15
1400 56 350 44 36 34 1560 20 28 26 15
1600 64 350 46 40 34 1760 25 35 30 10
1800 72 350 52 44 41 1970 25 35 30 10
2000 80 420 54 48 48 2180 25 35 30 10
2200 88 400 40 52 48 2390 25 35 30 10
2400 96 400 41 56 48 2600 25 35 30 10
2600 104 450 42 60 54 2810 25 35 30 10
2800 112 450 45 64 54 3020 25 35 30 10
3000 120 450 50 68 54 3220 25 35 30 1

Features

  • No flange or welding for quick install and disconnects. It is slipped over standard weight steel pipe and secured with T-bolt clamps.
  • Withstand pressure and vacuum. The maximum temperature is 225 °F.
  • Small volume, light weight and good elasticity.
  • Good sealing performance.
  • High resistance, solvent resistance, weather resistance and radiation resistance.

Applications
Because the rubber joint has good comprehensive properties, so it is widely used in:

  • Chemical industry
  • Construction
  • Water supply
  • Drainage
  • Circulating water
  • Oil
  • Infrastructure projects
  • Fire protection
  • Papermaking
  • Pharmaceutical
  • Petrochemical
  • Shipbuilding
  • Water pump
  • Compressor fan
  • Other piping systems.
Four pictures shows the wide range applications of rubber flexible joints.

Wide range of applications.

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sales@industrialhose.org

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