GB/T 25021-2026 Rail heavy-duty maintenance machinery—Track inspection car English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 25021-2026
Replaces GB/T 25021-2010
Rail heavy-duty maintenance machinery - Track inspection car
铁路大型养路机械 轨道检查车
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms, Definitions and Symbols
4 Composition and Operating Conditions
5 Vehicle Requirements
6 Interface Device Requirements
7 On board Inspection System Requirements
8 Test Methods
9 Inspection Rules
Railway heavy duty maintenance machinery — Track inspection car
1 Scope
This document specifies the composition and operating conditions, vehicle requirements, interface device requirements, on board inspection system requirements, test methods and inspection rules for track inspection cars.
This document applies to newly manufactured track inspection cars for standard gauge railways with a maximum structural speed of 200 km/h or less. For track inspection cars used on non standard gauge railways, this document may be used as a reference.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 146.1 Standard gauge railway clearance — Part 1: Rolling stock clearance
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 12817 General technical specifications for railway passenger cars
GB/T 12818 Rules for inspection and test of railway passenger cars after assembly
GB/T 16904.1 Gauge inspection for rolling stock of standard gauge railway — Part 1: Inspection method
GB/T 21563 Railway applications — Rolling stock equipment — Shock and vibration tests
GB/T 24338.3 Railway applications — Electromagnetic compatibility — Part 3 1: Rolling stock — Train and complete vehicle
GB/T 24338.4 Railway applications — Electromagnetic compatibility — Part 3 2: Rolling stock — Apparatus
GB/T 34571 Railway applications — Wiring rules for rolling stock
TB/T 3138 Technical requirements for flame retardancy of materials used in rolling stock
TB/T 3139 Limits of hazardous substances in non metallic materials and indoor air of rolling stock
TB/T 3548 General specification for strength design and test verification of rolling stock
3 Terms, Definitions and Symbols
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1 track geometry parameters
Parameters describing the geometric form of the track.
NOTE: Includes track vertical profile, alignment, gauge, cross level, twist, curvature, etc.
3.1.2 track geometry deviation
Numerical values expressing the quality of track geometry after evaluation or calculation of track geometry data according to relevant standards.
3.1.3 gauge point
The point at a distance of 16 mm below the highest point of the rail head, on the working side.
3.1.4 gauge
The distance between the gauge points of two rails in the same track cross section.
3.1.5 alignment
The lateral irregularity of the rail at the gauge points along the longitudinal direction of the track.
NOTE: The alignment of the left rail and the right rail of the same track are described separately as left alignment and right alignment.
3.1.6 longitudinal level
The vertical irregularity of the rail head along the longitudinal direction of the track.
NOTE: The longitudinal level of the left rail and the right rail of the same track are described separately as left longitudinal level and right longitudinal level.
3.1.7 cross level
The difference in height between the top surfaces of the left and right rails, relative to the horizontal plane, in the same cross section of the track.
NOTE: This does not include the superelevation and the superelevation ramp which are set on curves according to specifications.
3.1.8 twist
The distortion of the top surfaces of the left and right rails relative to the track plane.
3.1.9 track quality index; TQI
The sum of the individual standard deviations of the left longitudinal level, right longitudinal level, left alignment, right alignment, gauge, cross level and twist over a unit track length.
NOTE: An indicator reflecting the smoothness of a track section.
3.2 Symbols
The following symbols apply to this document.
A1: 1.5 m to 25 m wavelength.
A2: 1.5 m to 42 m wavelength.
A3: 1.5 m to 70 m wavelength.
4 Composition and Operating Conditions
4.1 Composition
The track inspection car consists of a vehicle, interface devices and an on board inspection system.
a) The vehicle, which carries the on board inspection system, shall be a qualified railway passenger car.
b) The interface devices are the associated or shared parts between the vehicle and the on board inspection system equipment, including mechanical interface devices and electrical interface devices. Mechanical interface devices include the connection structures for the measuring beam, sensors, external antennas, inspection cabinets and other equipment. Electrical interface devices refer to the power supply devices provided by the vehicle to the on board inspection system.
c) The on board inspection system shall be capable of the synchronous detection of track geometry and positioning. It may also be equipped with the optional functions of rail profile measurement, environmental monitoring, etc., according to the application scenario and user requirements.
4.2 Operating conditions
The environmental conditions, track conditions, power supply conditions, etc., under which the track inspection car is used shall comply with the relevant requirements of the corresponding type approved vehicle.
5 Vehicle Requirements
5.1 The vehicle requirements shall comply with the provisions of GB/T 12817.
5.2 After the installation of the interface devices and the inspection system equipment, the vehicle clearance shall comply with the provisions of GB 146.1.
5.3 After the installation of the interface devices and the inspection system equipment, the electromagnetic compatibility of the vehicle shall comply with the provisions of
Standard
GB/T 25021-2026 Rail heavy-duty maintenance machinery—Track inspection car (English Version)
Standard No.
GB/T 25021-2026
Status
to be valid
Language
English
File Format
PDF
Word Count
10500 words
Price(USD)
315.0
Implemented on
2026-10-1
Delivery
via email in 1~5 business day
Detail of GB/T 25021-2026
Standard No.
GB/T 25021-2026
English Name
Rail heavy-duty maintenance machinery—Track inspection car
GB/T 25021-2026 Rail heavy-duty maintenance machinery—Track inspection car English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 25021-2026
Replaces GB/T 25021-2010
Rail heavy-duty maintenance machinery - Track inspection car
铁路大型养路机械 轨道检查车
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms, Definitions and Symbols
4 Composition and Operating Conditions
5 Vehicle Requirements
6 Interface Device Requirements
7 On board Inspection System Requirements
8 Test Methods
9 Inspection Rules
Railway heavy duty maintenance machinery — Track inspection car
1 Scope
This document specifies the composition and operating conditions, vehicle requirements, interface device requirements, on board inspection system requirements, test methods and inspection rules for track inspection cars.
This document applies to newly manufactured track inspection cars for standard gauge railways with a maximum structural speed of 200 km/h or less. For track inspection cars used on non standard gauge railways, this document may be used as a reference.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 146.1 Standard gauge railway clearance — Part 1: Rolling stock clearance
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 12817 General technical specifications for railway passenger cars
GB/T 12818 Rules for inspection and test of railway passenger cars after assembly
GB/T 16904.1 Gauge inspection for rolling stock of standard gauge railway — Part 1: Inspection method
GB/T 21563 Railway applications — Rolling stock equipment — Shock and vibration tests
GB/T 24338.3 Railway applications — Electromagnetic compatibility — Part 3 1: Rolling stock — Train and complete vehicle
GB/T 24338.4 Railway applications — Electromagnetic compatibility — Part 3 2: Rolling stock — Apparatus
GB/T 34571 Railway applications — Wiring rules for rolling stock
TB/T 3138 Technical requirements for flame retardancy of materials used in rolling stock
TB/T 3139 Limits of hazardous substances in non metallic materials and indoor air of rolling stock
TB/T 3548 General specification for strength design and test verification of rolling stock
3 Terms, Definitions and Symbols
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1 track geometry parameters
Parameters describing the geometric form of the track.
NOTE: Includes track vertical profile, alignment, gauge, cross level, twist, curvature, etc.
3.1.2 track geometry deviation
Numerical values expressing the quality of track geometry after evaluation or calculation of track geometry data according to relevant standards.
3.1.3 gauge point
The point at a distance of 16 mm below the highest point of the rail head, on the working side.
3.1.4 gauge
The distance between the gauge points of two rails in the same track cross section.
3.1.5 alignment
The lateral irregularity of the rail at the gauge points along the longitudinal direction of the track.
NOTE: The alignment of the left rail and the right rail of the same track are described separately as left alignment and right alignment.
3.1.6 longitudinal level
The vertical irregularity of the rail head along the longitudinal direction of the track.
NOTE: The longitudinal level of the left rail and the right rail of the same track are described separately as left longitudinal level and right longitudinal level.
3.1.7 cross level
The difference in height between the top surfaces of the left and right rails, relative to the horizontal plane, in the same cross section of the track.
NOTE: This does not include the superelevation and the superelevation ramp which are set on curves according to specifications.
3.1.8 twist
The distortion of the top surfaces of the left and right rails relative to the track plane.
3.1.9 track quality index; TQI
The sum of the individual standard deviations of the left longitudinal level, right longitudinal level, left alignment, right alignment, gauge, cross level and twist over a unit track length.
NOTE: An indicator reflecting the smoothness of a track section.
3.2 Symbols
The following symbols apply to this document.
A1: 1.5 m to 25 m wavelength.
A2: 1.5 m to 42 m wavelength.
A3: 1.5 m to 70 m wavelength.
4 Composition and Operating Conditions
4.1 Composition
The track inspection car consists of a vehicle, interface devices and an on board inspection system.
a) The vehicle, which carries the on board inspection system, shall be a qualified railway passenger car.
b) The interface devices are the associated or shared parts between the vehicle and the on board inspection system equipment, including mechanical interface devices and electrical interface devices. Mechanical interface devices include the connection structures for the measuring beam, sensors, external antennas, inspection cabinets and other equipment. Electrical interface devices refer to the power supply devices provided by the vehicle to the on board inspection system.
c) The on board inspection system shall be capable of the synchronous detection of track geometry and positioning. It may also be equipped with the optional functions of rail profile measurement, environmental monitoring, etc., according to the application scenario and user requirements.
4.2 Operating conditions
The environmental conditions, track conditions, power supply conditions, etc., under which the track inspection car is used shall comply with the relevant requirements of the corresponding type approved vehicle.
5 Vehicle Requirements
5.1 The vehicle requirements shall comply with the provisions of GB/T 12817.
5.2 After the installation of the interface devices and the inspection system equipment, the vehicle clearance shall comply with the provisions of GB 146.1.
5.3 After the installation of the interface devices and the inspection system equipment, the electromagnetic compatibility of the vehicle shall comply with the provisions of
