GB146.1-2020
Gauge for standard gauge railways—Part 1: rolling stock gauge
标准轨距铁路限界 第1部分：机车车辆限界
GB 146.1-2020 is a current mandatory Chinese national standard for Gauge for standard gauge railways—Part 1: rolling stock gauge. It appears in the Auto compliance cluster with a product safety focus and has an implementation date of May 1, 2021.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the rolling stock gauge for 1435mm standard gauge railways. It is applicable to the design, manufacturing, and operation of standard gauge locomotives, passenger cars, freight wagons, and Electric Multiple Units (EMUs). It is mandatory for all rolling stock intended for operation on China's standard gauge railway network.
Technical requirements
The standard defines the limiting cross-sectional contour that restricts the physical dimensions of rolling stock. It divides the gauge into an upper gauge (above 350mm from the rail surface) and a lower gauge (350mm and below). The upper gauge includes specific contours for basic rolling stock, electrified railways, passenger dedicated line EMUs, and train signaling devices. Manufacturers must ensure that both empty and loaded vehicles, whether new with maximum tolerances or old with maximum wear, remain strictly within these contours. For the maximum allowable width, the standard establishes a basic calculation vehicle with a body length of 26m and a bogie center distance of 18m, setting a maximum allowable width of 3400mm. If a vehicle's dimensions exceed these reference parameters, the allowable width must be mathematically reduced. The standard provides specific formulas to calculate the geometric offset and corresponding width reduction to ensure safe clearance on curves with a radius of 300m. Regarding vertical dimensions, the lower contour design must account for static spring deflection under load and maximum wear. Specific lower gauge limits apply to vehicles passing through hump retarders. Furthermore, the standard mandates that designers must guarantee a safe distance between the rolling stock and trackside structures such as platforms, preventing any interference during normal operation.
Testing methods
Compliance is primarily evaluated through geometric and mathematical calculations rather than physical destructive testing. Engineers must use the provided formulas to calculate the mid-body and end-body lateral offsets on a standard 300m radius curve. The evaluation involves comparing the vehicle's designed manufacturing half-width against the maximum allowable half-width at specific heights from the rail surface, ensuring it does not exceed the limiting cross-sectional contour.
FAQs
What products are regulated under GB 146.1-2020?
It applies to standard gauge (1435mm) railway rolling stock, including locomotives, freight cars, passenger cars, and Electric Multiple Units (EMUs) operating on dedicated passenger lines.
Are there any major updates from the previous GB 146.1-1983 version?
The 2020 version introduces normative references, modifies the definition of the rolling stock gauge, adds requirements for safe operation during contour design, and includes a specific gauge contour for passenger dedicated line EMUs.
How does GB 146.1-2020 relate to the building clearance standard?
It is closely coordinated with GB 146.2-2020 (Building gauge). The standard provides specific mathematical formulas to calculate width reductions based on a vehicle's body length and bogie center distance, ensuring safe clearance in curves.
The summary above provides a high-level overview of GB 146.1-2020. To ensure complete compliance for your rolling stock entering the Chinese railway network, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 146.1-2020 today to access all detailed contour parameters, mathematical formulas, and testing procedures.
Applicability hints
- Type
- Foundational
- CCS
- s04
- ICS
- 45.060.01
- Competent department
- National Railway Administration
- Technical committee
- National Railway Administration
Relationships
Replaces:GB 146.1-1983