Overview of Standard Double Arch Rubber Flange Expansion Joint

Rubber expansion joints are flexible connectors fabricated of nature rubber or synthetic elastomers, steel ring and fabrics, and when necessary, metallic reinforcements provide stress relief in piping systems due to thermal and mechanical vibration and/or movements. ZHW® Rubber Expansion Joints provide relief from stresses caused by thermal expansion and contraction in pipelines. Movement is always experienced in piping systems due to varying ambient temperatures, differences in temperature of materials handled, and differences in composition. Expansion joints absorb this movement and eliminate the danger of buckling or pulling apart with the high replacement costs that would result.

ZHW ® Engineers can solve anticipated problems of vibration, noise, shock, corrosion, abrasion, stresses and space by incorporating rubber expansion joints into designed piping systems.

Description

ZHW Series MD602 is the most economical, full-pressure elastometric expansion joint available. These are the standard double sphere expansion joints consisting on high quality rubber body incorporating floating flanges in zinc plated carbon steel as a standard. They allow for axial compression or axial extension, and lateral deflection as well as angular movement. A variety of cover and tube elastomers are available, offering superior chemical, aging and temperature resistance from -30° to +250°F* operating.

Some of the notable features and benefits of the ZHW Series MD602 are:

  • Superior noise and vibration control
  • Easy Installation with Rotating Metallic Flanges
  • Wide Range of Flange Materials Available
  • Wide Range of Service and Lighter Weight
  • Most economical flexible connector
  • Large inventory means quick shipments

For more information about the features and benefits of the ZHW Series MD602, Download our brochure.

For up-to-date pricing and availability information. Contact ZHW today.

Physical and mechanical properties of rubber expansion joint
No Item Index Measured Value
inner/outer
rubber layer		 Unit(mm)
1 Tensile strength (Mpa) ≥11 13.5
2 Elongation at break(%) ≥400 560
4 Hardness (Shore A) 60±5 60
5 Brittleness temperature (℃) ≤-30 -40
6 Cohesive strength (between cord fabric) (KN/m) ≥2.0 4.8
7 Hot air aging
(100℃*48h)		 Rate of tensile strength reduction ≤25 15
Rate of ultimate elongation reduction ≤30 20
8 Mass change (10% H2SO4*Room temperature)% ≤3 2
9 Mass change (10% NaOH*Room temperature)% ≤3 2
Diameter, length and movement of double arches rubber expansion joint MD602
Diameter
DN		 Length
(mm)		 Axial movement(mm) Radial movement
(mm)		 Angular movement
(a1+d2)°
mm inch Elongation Compression
250 10〞 325 50 50 55 15
300 12〞 325 60 60 65 15
350 14〞 352 60 60 65 15
400 16〞 400 60 60 65 15
450 18〞 400 70 70 65 10
500 20〞 400 70 70 65 10
600 24〞 400 70 70 65 10
700 28〞 400 75 75 70 10
800 32〞 450 75 75 70 8
900 36〞 450 75 75 70 8
1000 40〞 450 75 75 70 8
1200 48〞 500 80 80 70 6
1400 56〞 500 80 80 75 6
1600 64〞 500 80 80 75 6
1800 72〞 500 80 80 75 6
2000 80〞 550 85 85 75 4
2200 88〞 550 85 85 70 4
2400 96〞 550 85 85 70 4
2600 104〞 550 85 85 70 4
2800 112〞 550 85 85 70 4
3000 120〞 550 85 85 70 4
Note: Standard ZHW Type MD602 rubber expansion joints shown in the table are considered Standards and if any different size and length please contact ZhongHaiWei.
For more accurate quotation please provide as following information:
Size & Over Length ___________________________________
Temperature ___________________________________
Application ___________________________________
Materials ___________________________________
Pressure/Vacuum with surges ___________________________________
End Drilling Pattern ___________________________________
Delivery ___________________________________
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