Car Vacuum Rubber Hose

Test Items

Test Condition

Standard Spec

Test Results

ID

3.2mm

3.15~3.45

OD

10.5mm

10.30~10.70

Volumetric expansion

6.9MPa

1.08ml/m

0.562ml/m

10.3MPa

1.38ml/m

0.783ml/m

Burst

27.6MPa × 2min; pressure raste 172.5±69MPa/min  

no leakage,>49MPa

>75MPa

Brake fluid compatibilit

120°C × 70h,27.6MPa × 2min;pressure raste 172.5±69MPa/min

no leakage,>49MPa

>80MPa

Whip

keep 1.55~1.72MPa

>35h

>80h

Tensile

tensile speed:25±3mm/min

>1446N

2400N

Cold Bend

-45°C ~-48°C× 72h, 3-5s,bending180°

no crack,no rupture

no crack,no rupture

Ozone

100pphm×70h×40°C, enlarge 7 times

no cracking

no cracking

Salt Spray

5%NaCl,after24h,water cleanout in 35°C

no recl rust on fitting

no recl rust on fitting

Water Aging

putat water in 85±2°C,after 70h~72h 27.6MPa × 2min;pressure raste 172.5±69MPa/min

burst>49h; whip>35h; tensile>1446N

>82MPa;>60h; >2500N