GB 16897-2022 PDF English
US$500.00 · In stock · Download in 9 secondsGB 16897-2022: Structure, performance requirements and test methods of brake hose Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 16897: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 16897-2022 | English | 500 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Structure, performance requirements and test methods of brake hose
| Valid |
| GB 16897-2010 | English | 85 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Brake hose -- Structure, performance and test methods
| Obsolete |
| GB 16897-1997 | English | 719 |
Add to Cart
|
5 days
|
Brake hose
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB 16897-2022
GB 16897-2022: Structure, performance requirements and test methods of brake hose---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB16897-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.40
CCS T 24
Replacing GB 16897-2010
Structure, Performance Requirements and Test Methods of
Brake Hose
Issued on: AUGUST 31, 2022
Implemented on: JANUARY 1, 2023
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 4
4 General Requirements... 5
5 Hydraulic Brake Hose Assembly... 6
6 Pneumatic Brake Rubber Hose Assembly... 15
7 Vacuum Brake Hose Assembly... 22
8 Pneumatic Brake Plastic Hose Assembly... 28
9 Identification... 43
10 Date of Implementation... 45
Bibliography... 46
1 Scope
This document specifies the structure, performance requirements, test methods and marking of
brake hoses, brake hose end fittings and brake hose assemblies for automobiles, motorcycles,
mopeds and trailers.
This document is applicable to hydraulic, pneumatic and vacuum brake hoses, as well as brake
hose end fittings and brake hose assemblies for automobiles, motorcycles, mopeds and trailers.
This document is not applicable to spiral pipes for automobiles and high-temperature gas
transmission rubber hoses.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in this text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 1690-2010 Rubber, Vulcanized or Thermoplastic - Determination of the Effect of Liquids
GB/T 7129-2001 Rubber or Plastics Hoses - Determination of Volumetric Expansion
GB/T 10125-2021 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests
GB 12981-2012 Motor Vehicle Brake Fluids
GB/T 14905-2020 Rubber and Plastics Hoses - Determination of Adhesion between
Components
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Brake Hose
Brake hose refers to a flexible hose used in the braking system to transmit hydraulic and
pneumatic energy to a brake or booster.
3.2 Brake Hose End Fitting
Brake hose end fitting refers to an accessory, except the clamp, attached to the end of the brake
hose for connection.
3.3 Brake Hose Assembly
Brake hose assembly refers to a brake hose fitted with brake hose end fitting.
NOTE. the brake hose can have armor or no armor.
3.4 Armor
Armor refers to a protective device mounted on the outside of the brake hose to increase the
resistance of the brake hose to scratches or impacts.
3.5 Free Length
Free length refers to the straight length of the exposed brake hose between the hose end fittings
when the brake hose assembly is in the vertical state.
3.6 Nominal Inside Diameter
Nominal inside diameter refers to the dimensions of the inside diameter of the brake hose
expressed in millimeters.
3.7 Nominal Outside Diameter
Nominal outside diameter refers to the dimensions of the outside diameter of the brake hose
expressed in millimeters.
4 General Requirements
4.1 The brake hose assembly used for the test shall be an unused product manufactured at least
24 h ago. Before the test, the brake hose assembly shall be placed at 15 C ~ 32 C for at least
4 h.
4.2 The brake fluid used in the test of the hydraulic brake hose assembly shall be HZY3 or
HZY4 specified in GB 12981-2012.Alternatively, other test media may also be used for the
test, but they shall be indicated in the test report.
4.4 The nominal inside diameter and nominal outside diameter allow the existence of positive
and negative deviations, and for ease of reference, integers can be used. Among them, hydraulic
brake hoses and other rubber brake hoses are expressed by nominal inside diameters, and
pneumatic brake plastic hoses and vacuum brake plastic hoses are expressed by nominal outside
diameters.
5 Hydraulic Brake Hose Assembly
5.1 Structure
The hydraulic brake hose assembly is composed of brake hose and brake hose end fitting,
allowing accessories (for example, armor, etc.) to be included. There shall be a permanent
connection between the brake hose and the brake hose end fitting, which is realized by
crumpling or cold extrusion of the end fitting part to the hose.
5.2 Performance Requirements
The test of the hydraulic brake hose assembly or corresponding parts shall be carried out in
accordance with 5.3.The test results shall satisfy the various performance requirements
specified in Table 1.
5.3 Test Methods
5.3.1 Inner hole passing after constriction
5.3.1.1 Requirements for gauge
The structure and size of the gauge shall satisfy the requirements of Figure 1, and its mass shall
satisfy the stipulations of Table 3.
If without cutting the hose, the gauge is completely inserted into the hose from one end fitting
Nominal Inside
5.3.1.2 Test procedures
5.3.1.2.1 Maintain the axis of the hydraulic brake hose assembly in the vertical state.
5.3.1.2.2 Select a gauge that complies with the stipulations of 5.3.1.1.At the inlet of the upper
end fitting of the hydraulic brake hose assembly, along the axis of the hydraulic brake hose
assembly, vertically release the gauge; record the free fall of the gauge under its own weight.
5.3.1.2.3 The cutting may be performed at a distance of 76 mm from the end fitting on one side
of the hydraulic brake hose assembly, then, at the cut end, vertically release the gauge for testing.
5.3.2 Maximum expansion quantity
In accordance with the stipulations of GB/T 7129-2001, carry out the test. The test pressure is
6.9 MPa, 10.3 MPa and 20.0 MPa. The test medium is distilled water or brake fluid.
5.3.3 Bursting strength
(minimum)
5.3.4 Compatibility of brake fluid
5.3.4.1 Test preparation
5.3.4.1.1 Connect the hydraulic brake hose assembly specimen from below to the fluid storage
tank with a capacity of 500 mL. Inject 100 mL of brake fluid into the fluid storage tank, as it is
shown in Figure 2.
5.3.4.1.2 Plug the lower end of the specimen filled with the brake fluid; vertically put the
specimen into a high-temperature test chamber.
5.3.4.2 Test procedures
5.3.4.2.3 In accordance with 5.3.1, carry out the test.
5.3.4.2.4 Within 3 h, in accordance with 5.3.3, carry out the test.
5.3.5 Flexural fatigue
5.3.5.1 Test equipment
The test equipment is mainly composed of a moving part and a fixed part. The schematic
diagram of the equipment is shown in Figure 3.The moving part is composed of a movable
horizontal connecting rod and a turntable. Both ends of the movable horizontal connecting rod
are vertically installed on the turntable through bearing. The distance between the center of the
turntable and the center of the bearing is 101.60 mm 0.12 mm. The fixed part is an adjustable
fixed horizontal connecting rod, which is parallel to the movable horizontal connecting rod in
the same horizontal plane with the center of the turntable. Several joints, through which the
hydraulic brake hose assembly can be installed in parallel, are installed on the two horizontal
connecting rods. The joints on the movable horizontal connecting rod are plugged; the joints
on the fixed horizontal connecting rod are connected with the hydraulic source. The volume of
the hydraulic source of the test equipment and the setting of the pipeline shall not affect the test
results. During the test, when the brake hose is damaged and the pressure drops to the set value,
the test equipment shall be able to automatically stop, and simultaneously record the running
time and the system pressure in the pipeline at the time of shutdown.
5.3.5.2 Test preparation
5.3.5.2.1 Remove the external accessories of the hydraulic brake hose assembly specimen, such
5.3.5.3 Test procedures
5.3.5.3.1 Apply a static pressure of 1.62 MPa 0.10 MPa to the piping system. Fill it with the
test medium specified in 5.3.2; exhaust all the air from the system.
5.3.5.3.2 Drive the turntable, so that it rotates at a speed of 800 r/min 10 r/min.
5.3.5.3.3 When the pressure drop of the hydraulic brake hose assembly specimen is caused by
leakage, terminate the test. At this moment, record the operating time and pressure. This
operating time is the flexural fatigue life.
5.3.6 Tensile strength
5.3.6.1 Test preparation
Vertically install the hydraulic brake hose assembly specimen on a tensile machine. Make the
axis of the specimen consistent with the direction of the tensile force.
5.3.6.2 Test procedures
The test shall be carried out respectively at the tensile speed of 25 mm/min 3 mm/min (slow)
and 50 mm/min 3 mm/min (fast), until the end fitting of the specimen falls off or the hose is
damaged. Record the maximum load and the type of damage.
5.3.7 Water absorption
In accordance with the stipulations of 5.3.5.2.2, measure and record the free length of the
hydraulic brake hose assembly specimen. Plug the fittings at both ends of the specimen, then,
immerse in distilled water at a temperature of 85 C 2 C for 70 h 2 h. After the specimen
is taken out of the water, within 30 min, use different specimens and respectively carry out the
test in accordance with the stipulations of 5.3.3, 5.3.5 and 5.3.6.
5.3.8 Cold resistance
5.3.9 Ozone resistance
5.3.10 Dynamic ozone resistance
5.3.10.1 Test preparation
5.3.10.2 Test gear
As it is shown in Figure 5, the test gear is composed of a fixed pin in the vertical direction and
a moving pin. The moving pin is inclined to the fixed pin and is 30 from the horizontal plane.
The length of the fixed pin and the moving pin is 14 mm. The diameter of the pin is determined
in accordance with the nominal inside diameter of the hose. It shall be ensured that the specimen
Nominal Inside Diameter Diameter of Mandrel
does not fall off during the test.
5.3.10.3 Test procedures
5.3.11 High-temperature pulse resistance
5.3.11.1 Test device
6 Pneumatic Brake Rubber Hose Assembly
6.1 Structure
The pneumatic brake rubber hose assembly is composed of metal-based brake hose end fittings
(or clamps) at both ends and a brake hose in the middle.
6.2 Performance Requirements
The pneumatic brake rubber hose assembly or the corresponding parts shall be tested in
accordance with 6.3.The test results shall satisfy the various performance requirements
specified in Table 6.
6.3 Test Methods
6.3.1 Inner hole passing after constriction
In accordance with 5.3.1.2, carry out the test. The gauge is shown in Figure 6.The mass of the
gauge is 60 g ~ 100 g; the diameter of the gauge head is 66% of the nominal inside diameter of
the hose.
6.3.2 Air tightness
Connect one end of the pneumatic brake rubber hose assembly specimen to the pressure system,
and plug the other end. Fill it with compressed air with a pressure of 1.4 MPa and maintain it.
After immersing the specimen in the water tank for 5 min, observe whether there are air bubbles
or local expansion.
6.3.3 Flexural fatigue
6.3.3.1 Test device
6.3.3.2 Specimen pre-treatment
6.3.3.3 Test procedures
6.3.4 Length change rate
Connect one end of the pneumatic brake rubber hose assembly specimen to the pressure system;
fill it with water; exhaust all the air, then, plug the other end. When the pressure reaches 0.1
MPa, draw a 300 mm interval marking line (or the free length of the hose) in the middle of the
specimen; continue to increase the pressure to 1.4 MPa, maintain for 5 min, then, re-measure
the distance between the interval marking lines. In accordance with Formula (1), calculate the
length change rate of the specimen.
6.3.5 Bursting strength
After the pneumatic brake rubber hose assembly specimen is tested in accordance with 5.3.12,
connect one end of the specimen to the pressure system; fill it with water; exhaust all the air,
then, plug the other end. At a speed of 6.2 MPa/min 0.7 MPa/min, apply the pressure, until
the end fitting of the specimen falls off, leaks, or the hose is damaged. Record the maximum
pressure and the type of damage.
6.3.6 Tensile strength
In accordance with 5.3.6, carry out the test. The tensile speed is 25 mm/min 3 mm/min.
6.3.9 Cold resistance
In accordance with 5.3.8, carry out the test. The test temperature is 40 C 2 C. The diameter
of the mandrel shall comply with the stipulations of Table 9.
6.3.10 Resistance to IRM903 standard oil volume change rate
6.3.10.1 Specimen preparation
Prepare a rectangular specimen with a length of 50 mm, a width of 8 mm and a thickness not
greater than 1.6 mm from the inner rubber layer of the pneumatic brake rubber hose assembly
specimen. The surface of the specimen shall be smooth.
6.3.12 Ozone resistance
Nominal Inside Diameter
Diameter of Mandrel
Heat Resistance Test Cold Resistance Test and Ozone Resistance Test
In accordance with 5.3.9, carry out the test. The diameter of the mandrel shall comply with the
stipulations of Table 9.
6.3.13 Corrosion resistance of end fitting
In accordance with 5.3.12, carry out the test.
7 Vacuum Brake Hose Assembly
7.1 Performance Requirements
The vacuum brake hose assembly or the corresponding parts shall be tested in accordance with
7.2.The test results shall satisfy the various performance requirements specified in Table 10.
Table 10 -- Performance Requirements of Vacuum Brake Hose Assembly
No. Test Item Unit Performance Requirement
7.2 Test Methods
7.2.1 Inner hole passing after constriction
In accordance with 5.3.1, carry out the test. For thick-wall vacuum brake hose assembly, the
outside diameter of the gauge is 75% of the nominal inside diameter of the brake hose. For thin-
wall vacuum brake hose assembly, the outside diameter of the gauge is 70% of the nominal
Nominal Inside Diameter Free Length of Hose Change of Outside Diameter
inside diameter of the brake hose. If the vacuum brake hose assembly has accessories, such as.
built-in or external check valves and silencing pipes, they shall be removed during the test.
7.2.2 Change of outside diameter after negative pressure resistance
Plug one end of the vacuum brake hose assembly specimen with a free length of 300 mm 5
mm; measure and record the outside diameter of the specimen. Connect the other end of the
specimen to the vacuum pressure source; apply a vacuum degree of 85 kPa 3 kPa and
maintain for 5 min, then, under this vacuum degree, measure the outside diameter of the most
deformed part of the specimen. The change of outside diameter of the specimen before and after
the vacuum degree is applied is the change of outside diameter after negative pressure resistance.
7.2.3 Bursting strength
Remove the adapting pieces, built-in or external check valves and push-in fittings, etc. Connect
one end of the vacuum brake hose assembly specimen to the pressure system; fill it with water;
exhaust all the air, then, plug the other end. At a speed of 6.2 MPa/min 0.7 MPa/min, apply a
pressure, until the end fitting of the specimen falls off, leaks, or the hose is damaged. Record
the maximum pressure and the type of damage.
7.2.4 Change of outside diameter after bending resistance
Take a brake hose whose free length complies with the stipulations of Table 11; mark it at A;
measure and record the outside diameter at the mark. Then, with a natural curvature, bend the
brake hose, until the two ends touch each other, as shown in Figure 8.Measure the outside
diameter at the mark again. The difference of the outside diameter before and after bending is
the change of outside diameter after bending resistance.
Figure 8 -- Schematic Diagram of Change of Outside Diameter after Bending Resistance
7.2.5 Bonding strength
In accordance with 6.3.7, carry out the test.
7.2.6 Heat resistance
7.2.8 Ozone resistance
In accordance with 5.3.9, carry out the test.
7.2.9 Fuel resistance
7.2.9.1 Take a vacuum brake hose assembly specimen with a free length of 300 mm 5 mm;
fill the specimen with the test liquid B that complies with the stipulations of Table A.1 in GB/T
1690-2010.Then, at room temperature, place it for 48 h 2 h.
7.2.9.2 5 min after the test liquid is discharged from the specimen, in accordance with 7.2.1,
carry out the test.
7.2.9.3 10 min after the test liquid is discharged from the specimen, connect the specimen to
the vacuum pressure source; apply a vacuum degree of 85 kPa 3 kPa; maintain for at least 5
min, then, observe whether the specimen leaks.
7.2.9.4 In accordance with 6.3.7, carry out the test.
7.2.10 Deformation resistance
7.2.10.1 Prepare a brake hose specimen with a length of 25.4 mm; measure and record the
outside diameter of the specimen.
7.2.10.2 In accordance with Table 14, select the corresponding limit block (length 25.4 mm);
insert it into the full length of the specimen.
7.2.10.3 Place the specimen on the pressurizing device; gradually apply a compressive load to
the specimen, as it is shown in Figure 9, so that the size of the specimen after deformation
gradually reaches the thickness of the limit block. Maintain the compressed state for 5 s, then,
remove the load and record the compressive load.
7.2.10.4 Re-apply the compressive load to the specimen, so that the size of the specimen after
deformation reaches the thickness of the limit block. Maintain the compressed state for 5 s, then,
remove the load. Perform a total of 4 times, with an interval of 10 s allowed between each two
times. Record the last compressive load.
7.2.10.5 Remove the specimen and place it at room temperature for 60 s, then, re-measure and
record the outside diameter of the specimen. The outside diameter retention rate of the specimen
shall be calculated in accordance with Formula (3).
8 Pneumatic Brake Plastic Hose Assembly
8.1 Structure
The pneumatic brake plastic hose assembly is composed of two end fittings and a middle plastic
hose.
8.2 Performance Requirements
Nominal Inside Diameter Width of Limit Block Thickness of Limit Block
The pneumatic brake plastic hose assembly and the corresponding parts shall be tested in
accordance with 8.3.The test results shall satisfy the various performance requirements
specified in Table 15.
9 Identification
9.1 Brake Hose
9.1.1 Identification strip
9.1.2 Identification requirements
For the identification of each brake hose, the interval from the end of one identification to the
beginning of the other identification shall be less than 152 mm; the identification content shall
be expressed by printed English letters or numbers; the height of the font shall be greater than
3.2 mm.
9.1.3 Identification content
See the identification content below.
9.2 End Fitting of Brake Hose
Except for the brake hose assembly whose end fitting is deformed relative to the brake hose by
crumpling, cold extrusion, thermal bonding or press-fitting processes, at least one of the brake
hose end fittings shall have an identification expressed through the method of etching,
embossing or bonding. This identification shall be expressed by printed English letters or
numbers; the height shall not be less than 1.6 mm. The identification content is the abbreviation
of the manufacturer or a traceable identification of the manufacturer.
9.3 Brake Hose Assembly
9.3.1 For the brake hose assembly with end fittings installed through the processes of crumpling,
cold extrusion, thermal bonding or press-fitting, the identification shall be made in accordance
with the stipulations of 9.3.2 or 9.3.3
9.3.2 In accordance with the position recommended by the assembly manufacturer, add a band
identification on the brake hose assembly. The band identification shall freely move along the
longitudinal axis of the brake hose assembly between the end fittings of both ends. The band
identification shall be expressed by printed English letters or numbers with a height of not less
than 3.2 mm through the method of etching, embossing or bonding. See the identification
content below.
a) Serial No. of Standard. “GB 16897”;
b) Date of manufacture;
c) Manufacturer or its abbreviation.
9.3.3 For the brake hose assembly with end fittings installed through the processes of crumpling,
cold extrusion, thermal bonding or press-fitting, at least one end of the brake hose assembly
shall have an identification on the end fitting. The identification shall be expressed through the
method of etching, embossing or bonding. Indicate the manufacturer’s abbreviation or a
traceable identification of the manufacturer of the brake hose assembly with printed letters or
numbers with a height of not less than 1.6 mm.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB 16897-2022 be delivered?Answer: The full copy PDF of English version of GB 16897-2022 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB 16897-2022_English with my colleagues?Answer: Yes. The purchased PDF of GB 16897-2022_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB 16897-2022 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB 16897-2022?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 16897-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB 16897-2022?A step-by-step guide to download PDF of GB 16897-2022_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB 16897-2022".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|