EXPANSION JOINTS

Expansion Joints RonamFlex F.50 / F.100 / F.200

The joint of expansion RONAMFLEX is composed by an element in rubber strengthened with metallic armors, the same are completely combined in the rubber to protect them from the corrosion.

The rubber type used is resistant to the abrasion and it is perfect to resist at particularly serious solicitations as those caused from pneumatic end chains, it is oil/gasoline/antifreeze salt/direct exposure to the sunrays resistant. The technical characteristics are conformed to Norms CNR UNI 10018/87.

The metallic armors are in steel S 275 JR cold laminated second UNI 7070 and the adherence rubber-steel it is superior 10 N/mm.

The system of anchorage of the elements is realized with filleted bars in galvanized steel having the right dimensions and section, they are endowed of a no-unscrew system and they are attached to the structure by an epossidic resin.

Rubber properties M.U. Requirements Test methodology UNI
Hardness Shore A3 60 868
Hardness field Shore A3 55 ÷ 65
Specific hardness tollerance Shore A3 ± 5
Breaking load N/mm² > 15,5 6065
Elongation at break % > 450 6065
Last deterioration after compression of 25% 24 h 70° % < 20 4913
Thermal deterioration after 96 h 70°C maximum hardness variation Shore A3 ± 10 5408
Maximum resistance at break variation % - 15 5408
Maximum variation elongation % a breaking % - 20 5408
Ozone resistance (50 p.p.c.m. 20% elongation 96 h 40°C) Nessuna screpolatura 6067 - 6068
Fragility limit temperature °C < - 25 7320
Rubber-metal attack N/mm > 10 5405
G Modulus N/mm² 0,9 CNR 10018
Tollerance modulus % ± 15
Steel properties for armour plate M.U. Requirements Test methodology UNI
Tensile strenght at break N/mm² R > 430 10025
Exhaustement tension N/mm² Rs > 275 10025
Elongation at break % A > 23% 10025
background

DO NOT HESITATE TO CONTACT US