TB/T 3450-2016 in English
VALIDSpecial steel supports for transporting long steel rails using flatcars
- Issued on:2016-08-16
- Implemented on:2017-02-16
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | TB/T 3450-2016 |
| Document status: | VALID |
| Title in English: | Special steel supports for transporting long steel rails using flatcars |
| Title in Chinese: | 长钢轨普通平车运输专用座架 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-08-16 |
| Implemented on: | 2017-02-16 |
| Professional Classification: | TB-Railway Transport |
| Related Keywords: | special steel supports
long steel rails long rails standard technical dimension ordinary seat frame locking seat frame core function isolation function key components partition beam + bottom beam additional fastening device safety factor |
| Related Topics: | general
tb/t 1961-2016 tb/t3441-2016 tb/t3367-2016 tb/t2993.5-2016 rails Wavelength use tb/t3440-2016 general/ Flatcar Electric flat car rail technology tb/t 3466-2016 tb/t 3432-2016 |
Introduction
Analysis of the core content of the standard
| Technical dimension | Ordinary seat frame | Locking seat frame |
|---|---|---|
| Core function | Isolation layer/lateral limit | Additional longitudinal locking function |
| Key components | Partition beam + bottom beam | Additional fastening device |
| Safety factor | 1.4 (unified standard) | |
Detailed explanation of key technical requirements
The standard stipulates that special seats must meet the three-way limit requirements:
- Partition beams achieve vertical stratification (maximum deflection ≤L/400)
- Middle support controls lateral displacement
- Fastening device suppresses longitudinal sliding
Typical application case
When a railway bureau used a locking seat that complies with this standard to transport 500m long rails:
- Impact test passed 8km/h speed level
- Rail displacement under emergency braking conditions <3mm
- Line dynamic stress response reduced by 27%
Background of standard evolution
With the advancement of high-speed railway construction, traditional rail transportation methods face challenges:
- Before 2010: the accident rate of simple supports reached 1.2‰
- 2013: the concept of layered locking was proposed for the first time
- 2016 version: introduction of dynamic response test requirements
Implementation Suggestions
| Links | Key Control Points |
|---|---|
| Manufacturing stage | 100% flaw detection of side column-bottom beam welds |
| Loading operation | Ensure symmetrical arrangement with a spacing of 14m |
| Maintenance | Regularly check the torque value of the lock nut |
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