JMFlex Expansion Joints

JMFlex bellows type expansion joints are available ex-stock in rubber or stainless steel.

Searching Tests
JMFlex rubber and elastomer joints have been subjected to exhaustive tests. Movements, pressures and temperatures where tested in line with DIN 4809.

Flexibility Test
DIN 4809 calls for each joint in the sample to be tested under the following conditions :-

Number of movements : 2500 load changes at maximum deflection (13mm compression and 9mm extension)
Pressure : 10 Bar
Temperature : 100ºC

Followed by an increased pressure test.

Pressure Test
Test pressure : 20 Bar
Temperature : 100ºC
Duration : 1 Hour

Burst Pressure Test
After the ageing test the joints had to undergo a burst pressure test which had to be greater than 30 Bar.

Test Certificates
Every JMFlex expansion joint is hydraulically pressure tested to 1½ times it's maximum working pressure prior to despatch and a test certificate is issued.

Accompanying Documentation
A "Safety and Installation" booklet is sent with every order and each joint has a tag giving advice on installation and maintenance.

JMFlex PED Approved Expansion Joints and Compensators
The European Pressure Equipment Directive became mandatory on the 30th May 2002 and lays down stringent requirements for all equipment subject to pressure, including bellows type expansion joints.

The JMFlex range of rubber expansion joints has been thoroughly tested on our own PED test rigs to the movements, pressures, temperatures and burst pressures, as stipulated by DIN 4809.

We are pleased to say that the JMFlex range of expansion joints are now PED approved by LRQA for PED Group 1 liquids and fall into the following PED categories when used at their maximum design pressure :-

Size range 32mm to 100mm inclusive = Article 3 Paragraph 3 (S.E.P.)
Size range 125mm to 300mm inclusive = Category II

Please contact our sales office if JMFlex expansion joints are to be used with PED Group 1 gases.

Click here for a JMFlex expansion joint data sheet.

 

 

 

 

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