Date:

2018.7.25

Standard:

HG/3037-2008

No.:

Projects:

Technical Method:

Standard

Measured value

Test result

1

Tensile strength of inner rubber and outer rubber (min)

GB/T528

9 Mpa

11.2 Mpa

Conformity

Elongation of elongation for inner rubber and outer rubber (min)

250%

280%

Conformity

2

Accelerated aging

ISO188(Air oven)    

under (70±1)℃14d

20%

16%

Conformity

Tensile strength of inner rubber and outer rubber (max)

Elongation of elongation for inner rubber and outer rubber (max)

-35%

-22%

Conformity

3

Liquid resistance

70h under 40℃ 3 type fuel oxidation;

70h under 100℃  IRM903 oil.

70%

53.20%

Conformity

Swelling rate of inner rubber (max)

25%

15.60%

4

Solvent extract of inner rubber, Room temperature level (max)

70h under 40℃3 type fuel oxidation

and 24h under 100℃ dry

10%

4.20%

Conformity

5

Swelling rate of outer rubber (max)

70h under 23℃B liquid soak.

100%

23.20%

Conformity

6

Low temperature resistance under -30℃  of inner and outer rubber

GB/T528

No creak under 10times magnification

No creak

Conformity

7

Ozone resistance of outer rubber

168h under HG/T2869(50±5) mPa concentration, 40±2℃, relative humidity (55±10)%,stretch 20%

No creak under 2 times magnification

No creak

Conformity

8

Test pressure (2.4 Mpa)

GB/T5563 W.P pressure testing

No leakage or other defects

No leakage

Conformity

9

Break pressure (min)

GB/T5563 B.P pressure testing

4.8Mpa

12Mpa

Conformity

10

length varying - ratio under test pressure:

GB/T5563

0-5%

1.10%

Conformity

11

Ply bond strength

Inject the B liquid into the hose for sealing,

after 168h under (23±5) ℃, empty liquid for test

Conformity

initial value (min)

2.4KN/m

unpeelable

Soak value (min)

1.8KN/m

3.2 KN/m

12

Conductivity (max) M class

GB/T9572

1*102Ω

1*101Ω

Conformity

13

Low temperature bending test

GB/T9572

No crack or fracture

No crack or fracture

Conformity

14

Volume expansion rate (max):

Under 0.3MPa no larger than 1%

Under 0.3MPa no larger than 1%

0.20%

Conformity

15

UV-Resistance

BG/T16422.3

No crack

No crack

Conformity

Comprehensive judgment:

Conform to HG/T3037-2008 requirements，

test result to be qualified.

Assessor: Yonghua Yan

Date：2018.7.25

Size

5/16

Examination Date

2018-8-02

Operative Norm.

SAE R17

NO.

Testing Item

Unit

Standard Request

Testing Result

Single Judgment

1

Appearance

Non-wire braided outside，Disallow bleb、Gape、Sponge、Delamination

No Flaw

OK

2

Dimension

mm

I.D.：7.9±0.3 mm
O.D.：14.8±0.5mm

7.9
14.8

OK

3

Seal Function

Psi

Test Pressure is no less than 1.5 times of Appointed Work Pressure，Say 3000 psi，Pressure Holded 1min，without leakage and damage.

3000 psi

OK

4

Length Variation Rate

%

Under the designed Work Pressure, length of hose is no more than -4%～+2%。

-3%

OK

5

Burst Pressure

Psi

Test pressure is 4 times of Appointed pressure, Say 12000 psi，Pressure Holded 1min，Without any breakage，then rise up the pressure until breakage.

12000 psi

OK

6

Min. Bend Radius

mm

55 mm

OK

Meeting the criterion after Testing，hoses be allowed to shipment.