Specification For Hoses

Requirement

Cover

Tube

Test Conditions

Original Properties 55 to 75 55 to 75 At Room Temperature
Tensile Min (Mpa) 6.9 6.9 At Room Temperature
Elongation Min (%) 200 150 At Room Temperature

Heat Ageing Change

Hardness (Deg.) - +15 70 hours at 100 0 C
Tensile (%) Max 20 -20 70 hours at 100 0 C
Elongation (%) Max 50 -50 70 hours at 100 0 C

Oil Immersion Change

Volume (%) Max +100 +150 ASTM no. 3 Oil 70 hours at 100 0 C
Tensile (%) Max -50 - ASTM no. 3 Oil 70 hours at 100 0 C

Coolant Immersion Change

Volume (%) Max - +5 to + 20 Reflux 70 hours
Hardness (Deg). Max - -10 to +10 Reflux 70 hours
Tensile (%) Max - -10 Reflux 70 hours
Elongation (%) Max - +25 Reflux 70 hours

Test Parameter on Hose :
Adhesion Test on Tube to Cover : 1400 N/m or 8 lb/in.
Vacuum Collapse to withstand 17 K pa without collapse
Burst Pressure Minimum 0.86 Mpa