Tested Products( Product Lot No. 2006-04) :13MM×22MM  AIR BRAKE HOSE

NO.

TEST ITEMS

SPEC. SAE J1402

QDGY BRAND TEST RESULT

1

VISUAL INSP.

NOTHING ABNORMAL

OK

2

FEELER GAUGE SIZE

6.6MM 40-100g

OK

3

PROOF PRESSURE

ONE END BLOCK UP, THE OTHER END FILL 1.4MPA AIR OR NITROGEN UNDER WATER FOR 3MINUTES

NO LEAKS

4

WATER PRESSURE TEST

FULL WATER OF HOSE, MARK 300MM UNDER 0.1MPA PRESSURE, TEST DISTANCE UP TO 1.4 MPA

LENGTH CHANGE FROM +0.5 TO -0.7%

5

BURST TEST

6.5MPA/MIN PRESSURE UPTO BURST

≥6.5MPA

6

TENSILE TEST

450MM, 25-30MIN. UPTO BRAKE

≥1500N(150KG)

7

ADHESION TEST

LENGTH 100MM, WIDTH 25MM, 25±1.5MM/MIN

15N(1.5KG/CM)

8

HIGH TEMPERATURE RESISTANCE TEST

BEND, AT100±2 FOR 72 HOURS, STRIKE WITH 0.5KG

INNER AND OUTER NO CRACKS

9

LOW TEMPERATURE RESISTANCE TEST

BEND HOSE AND EXPOSE AT -40±2 FOR 72HOURS THE BEND SHALL BE COMPLETED IN A PERIOD OF 3-5S

NO LEAKAGE

10

WATER RESISTANCE TEST

HOSE ASS'Y IMMERSE IN WATER AT ROOM TEMPERATURE, AFTER 168 HOURS, STRAIGHTEN

≥1500N(150KG0

11

OIL RESISTANCE TEST

1.5-2G INNER TUBE IMMERSE #10 OIL, 72HOURS

VOLUME INCREASE≤100%

12

OZONE TEST

50+5PPM; 40+3 72H,7X MAGNIFICATION

NO CRACKS

13

SALT SPRAY TEST

USE SALT SPRAY (FOG) TEST THE HOSE FOR 24 HOURS, THEN USE CLEAN WATER(37)WASH, DRY IN 2 MIN

NO CORROSION LOSS RATE≥0.01

14

BEND TEST

AFTER HIGH TEMPERATURE TEST, BEND TEST IN 168 HOURS, FILL IMPA AIR, KEEP 2MIN, STRIKE ONE MILLION TIMES