QC/T 476-2025 PDF English
US$275.00 · In stock · Download in 9 secondsQC/T 476-2025: Requirement and test method for rain proof performance of bus Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid QC/T 476: Evolution and historical versions
Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
QC/T 476-2025 | English | 275 |
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Requirement and test method for rain proof performance of bus
| Valid |
QC/T 476-2007 | English | 70 |
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Rain proof performance limit and test method for bus
| Valid |
QC/T 476-1999 | English | 199 |
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2 days
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Rain proof performance limit for buses
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: QC/T 476-2025
QC/T 476-2025: Requirement and test method for rain proof performance of bus---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/QCT476-2025
QC
AUTOMOTIVE INDUSTRY STANDARD
ICS 43.080.20
CCS T 42
Replacing QC/T 476-2007
Requirement and Test Method for Rain Proof Performance
of Bus
Issued on: MAY 9, 2025
Implemented on: NOVEMBER 1, 2025
Issued by. Ministry of Industry and Information Technology of the People’s
Republic of China
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Performance Requirements... 6
5 Test Conditions... 7
5.1 Test vehicle... 7
5.2 Test equipment... 7
6 Test Methods... 7
6.1 Raining simulation test... 7
6.2 Vehicle washing simulation test... 8
6.3 Driving inspection... 9
6.4 Test record... 9
Appendix A (Informative) Raining Simulation Device... 10
Appendix B (Normative) Equipment Verification... 12
Appendix C (Informative) Raining Test Record Sheet... 15
Requirement and Test Method for Rain Proof Performance
of Bus
1 Scope
This Document specifies the performance requirements, test conditions, and test methods for
the rainproof sealing of buses.
This Document applies to M2 and M3 buses; other vehicles shall be implemented as a reference.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 3730.1 Terms and definitions of motor vehicles, trailers and combination vehicle -
Part 1.Types
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 4780 Terms for motor vehicle body
GB/T 15089 Classification of power-driven vehicles and trailers
GB 18384-2020 Electric vehicles safety requirements
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 3730.1, GB/T 4780,
GB/T 15089 and the following apply.
3.1 Rain proof performance for bus
The ability of a bus to close all doors, windows and opening covers to prevent rainwater from
entering the passenger compartment, luggage compartment and other assemblies and
components when being sprayed with rainwater.
3.2 Seep
The phenomenon that water slowly emerges from the cracks and spreads around along the inner
surface of the vehicle body, but does not fall.
3.3 Leakage
The phenomenon that water appears from cracks, leaves, or falls or flows along the inner
surface of the vehicle body.
NOTE. "leakage" includes "drop" and "flow".
3.3.1 Drop
The phenomenon that water appears from the cracks, leaves or falls intermittently along the
inner surface of the vehicle body.
3.3.2 Flow
The phenomenon that water appears from the cracks, leaves or falls or flows continuously along
the inner mark of the vehicle body.
3.4 Average raining intensity
The ratio of the total volume of water sprayed by each nozzle within a given shower surface
per unit time to the total shower area covered by each nozzle within that shower surface.
NOTE. Average raining intensity is measured in millimeters per minute (mm/min).
4 Performance Requirements
4.1 During the rain simulation test, no water leakage shall occur in the passenger compartment,
luggage compartment, or equipment compartment. For buses with a length of 9 m or less, water
shall not seep into the passenger compartment at more than 3 locations; for buses with a length
of more than 9 m, water shall not seep into the passenger compartment at more than 5 locations.
4.2 During the vehicle washing simulation test, no water leakage shall occur in the passenger
compartment. At the end of the test, no water shall accumulate on the floor of the luggage
compartment and equipment compartment, or in the exterior lighting and signaling devices.
4.3 During the driving inspection, no water leakage shall occur in the passenger compartment,
and no electrical failures in the bus's electrical systems shall occur due to rainproof sealing. For
pure electric buses and hybrid electric buses, the insulation resistance of the entire vehicle in a
wet state shall be greater than 1 MΩ after the vehicle washing simulation test.
5 Test Conditions
5.1 Test vehicle
The test vehicle must meet the manufacturer's specified technical requirements. Parts within
the vehicle compartment that do not affect the test results may be removed to facilitate testing
and inspection.
5.2 Test equipment
5.2.1 Raining simulation device
5.2.1.1 The raining area shall be larger than the vertical projection area of the vehicle under test
and shall expose all tested areas, including the front, sides, rear, top, and bottom, to rain evenly.
5.2.1.2 The average raining intensity on each rain-exposed surface (hereinafter referred to as
"raining intensity") shall be independently adjustable and controlled to ensure a raining
intensity of 12 mm/min ± 1 mm/min on the front and 8 mm/min ± 1 mm/min on the sides, rear,
top, and bottom of the vehicle.
5.2.1.3 The structural layout of the raining simulation device is provided in Appendix A.
5.2.2 Vehicle washing simulation equipment
IPX5 hose nozzles specified in GB/T 4208-2017 shall be used. The spray water flow rate during
simulating vehicle washing shall be controlled within 12.5 L/min ± 0.5 L/min.
5.2.3 Equipment verification
The nozzles and pipeline of the raining simulation device and vehicle washing simulation
device shall be cleaned regularly and verified in accordance with the provisions in Appendix B.
6 Test Methods
6.1 Raining simulation test
6.1.1 Before the test begins, confirm that the electrical system is fault-free and the vehicle's
historical fault codes have been cleared.
6.1.2 Park the test vehicle in a designated location within the rain-proof area. Set the parking
brake at the brake state, and the engine to idle (or powered on for electric buses). Start the air
conditioning fan in external circulation mode and adjust the fan speed to the highest setting.
The test personnel enter the passenger compartment and close all doors, windows, and opening
covers.
6.1.3 Start the raining simulation device and adjust the rainfall intensity on each raining surface
to the conditions specified in 5.2.1.2 using the flow control valve. After the rain stabilizes, start
the wipers to the appropriate position; turn on the high beam and fog lights, and begin the test.
The test duration is 15 min.
6.1.4 During the test, observe and record any leakage (e.g., seep, drop, or flow) in the passenger
compartment, luggage compartment, and equipment compartment. Water accumulation along
the passenger door seals and gaps at the lower edge of the passenger door onto the vehicle floor
and steps during the test shall not be counted as leakage. For leakage in the luggage
compartment and equipment compartment, after the rain stops, wipe away any accumulated
water at the hatch joints before opening the hatch for inspection. Alternatively, use an
endoscope or other auxiliary tool to conduct an inspection during the simulated rain.
6.2 Vehicle washing simulation test
6.2.1 A vehicle washing simulation test (any water stains or accumulated water in the passenger
compartment and luggage compartment shall be wiped clean before the test) shall be performed
as soon as possible after the raining simulation test.
6.2.2 Turn off the engine (for electric buses, power off), air conditioning fan, lighting device,
and wipers.
6.2.3 Start the vehicle washing simulation device, and adjust the water flow rate to the setting
specified in 5.2.2.Aim the hose nozzle at all doors (excluding sliding, folding, and inward-
swinging doors), windows, opening covers, and joints between various components of the bus,
spraying twice in a reciprocating motion. During spraying, the nozzle outlet shall be 300 mm
to 500 mm from the joint, with the nozzle axis approximately perpendicular to the plane of the
vehicle body along which the joint line is located. The nozzle movement speed shall be 0.1 m/s
to 0.5 m/s.
6.2.4 During the test, observe and record any leakage (e.g., seep, drop, and flow) in the
passenger compartment, luggage compartment, and equipment compartment. During the test,
water that accumulates along the passenger door seals and gaps at the lower edge of the
passenger door and flows into the interior floor and steps shall not be counted as leakage. For
leakage in the luggage compartment and equipment compartment, wipe away any accumulated
water from the hatch joints before opening the hatch for inspection when the vehicle washing
simulation stops. Alternatively, use an endoscope or other auxiliary tool during the simulated
vehicle washing.
6.2.5 After the vehicle washing simulation test, inspect whether the lighting device accumulates
water.
6.2.6 For pure electric buses and hybrid electric buses, conduct entire vehicle insulation
resistance measurements in accordance with 6.2.1 of GB 18384-2020 within 30 min of the
vehicle washing simulation test.
...... Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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