NO

INS ITEM

5/16"

3/8"

1/2"

5/8"

1

INNER DIAmm

8±0.2

9.6+0.5

12.7+0.5

16±0.2

OUTER DIAmm

14±0.3

17±0.3

22±0.4

26±0.4

2

CONSTRICTION TEST

φ6.6mm、Length =hose length+30mm Plug Gages all passed

3

AIRTIGHTNESS

1.4Mpa  3min  No bubble、No expansion

4

BUTST TEST

Burst Stength ≥5.52Mpa

5

LENGTH CHANGE

0.1Mpa

Length change -7~+5%

1.4Mpa

6

Tensile test

 Tensile speed 25.4mm/min 1500Nstength No leack

7

Adhesion test

Adhesion strength ≥15N/CM

8

High Temp Test

100℃x70h Inner and Outer No leak

9

Low Temp test

-40℃x70h hose,bend hose inner and outer No leak and crack

10

Oil Resist

Hose volum increment can not more than 100%

11

Water Resist

Sop 70h、speed 25.4mm/min Tensile stength1500N hose No leak

12

Ozone Test

50±5pphmx40℃x70h, 7times enlarge No Leak

13

Salt Spray test

Follow GB6458standard, 24h test,hose end No corrosion