Railway wagons operate in some of the most demanding environments in the transportation industry. Continuous exposure to moisture, road contaminants, industrial pollutants, mechanical wear, and weather conditions leads to corrosion, coating degradation, and surface contamination. Before repainting, repair, refurbishment, or manufacturing operations, the wagon surface must be thoroughly cleaned to ensure long-term coating performance and structural integrity.
Techvagonmash railcar blast rooms are designed for efficient abrasive blasting and surface preparation of freight wagons, passenger railcars, metro cars, and other railway rolling stock. The systems provide high-quality cleaning of external surfaces, removal of corrosion products, old coatings, mill scale, and contaminants while ensuring operator safety, environmental compliance, and reduced operating costs.
What Is a Railcar Blast Room?
A railcar blast room is a specialized enclosed facility designed for abrasive cleaning of railway rolling stock. During the blasting process, operators use high-performance blast nozzles to propel steel shot, steel grit, or other abrasive materials at high velocity onto the wagon surface.
The impact of abrasive particles removes:
- Rust and corrosion
- Mill scale
- Old paint coatings
- Welding scale
- Surface contamination
- Oxidation products
The resulting surface achieves the cleanliness and roughness profile required for modern protective coating systems.
Techvagonmash blast rooms can achieve surface preparation standards up to Sa 2½ and Sa 3 according to ISO 8501-1 requirements.
Shot blasting chamber diagram
1. Working chamber
2. Shot circulation system
3. Shot blasting machine
4. Lighting
5. Air cleaning system
6. Elevating access platforms
Blast Room Structure
The camera body is constructed of durable metal structures with internal protection against abrasive impacts.
Special wear-resistant rubber screens and cladding materials are used to protect the walls and ceiling, preventing premature wear.
Abrasive Recovery System
The abrasive recovery system is designed to provide continuous collection, transportation, cleaning, and recycling of abrasive material throughout the blasting process. It operates as an integrated system consisting of scraper conveyors, transverse conveyors, a bucket elevator, an air-wash separator, and an abrasive storage hopper, ensuring uninterrupted abrasive circulation and efficient material handling.
During the recovery process, used abrasive is automatically collected from the blast room floor and transferred to the separation unit, where dust, scale, and other contaminants are removed. The cleaned abrasive is then directed to the storage hopper and returned to the blasting equipment for further use.
This automated recycling process significantly reduces abrasive consumption, lowers operating costs, minimizes waste generation, and improves the overall efficiency of surface preparation operations. The ability to reuse steel abrasive multiple times contributes to higher productivity and provides substantial economic benefits for industrial blasting applications.
Shot Blast Operator Workwear
Shot blast operators are provided with a complete set of personal protective equipment designed for safe and comfortable work in intensive abrasive blasting conditions. A purified air preparation and supply system provides respiratory protection, maintaining optimal working conditions throughout the shift. Depending on the season, the air conditioning system can be set to heat or cool the supplied air, providing additional operator comfort.
The protective gear includes a durable safety helmet, a reliable coverall to protect the body from abrasive exposure, special protective gloves, and an air filter to ensure clean breathing air. This comprehensive set of protective equipment significantly improves occupational safety, reduces personnel fatigue, and ensures compliance with industrial safety requirements.
Dust Collection and Ventilation System
Efficient ventilation is essential for maintaining clear visibility inside the blast room, ensuring operator safety, and meeting environmental protection requirements. The dust collection and ventilation system is designed as an integrated solution that combines a cartridge filter unit, a radial fan, an air duct network, an automatic filter cleaning mechanism, and a dust collection hopper.
During blasting operations, dust and airborne contaminants are continuously extracted from the working area and transported to the filtration unit, where particulate matter is separated from the airflow. The cleaned air is then safely discharged into the atmosphere, providing a healthier and more comfortable working environment while maintaining optimal visibility inside the chamber.
The pulse-jet filter cleaning system automatically removes accumulated dust from the filter elements, ensuring stable airflow, high filtration efficiency, and uninterrupted operation of the equipment. This advanced ventilation solution helps extend filter service life, reduce maintenance requirements, and improve the overall efficiency of the blasting process.
Lighting system
To ensure high-quality work, the chamber is equipped with industrial LED lighting.
Specially protected luminaires provide uniform illumination of the entire work area and maintain functionality even in conditions of intense dust and abrasive exposure.
Description of equipment operation
The work is done as follows: the wagon is pulled into the chamber by a winch. The doors are closed, two operators clean the wagon outer surface by shot blasting. Used shots fall through the grid floor in the area with a pusher-bar conveyor which colletct shots in the chamber center in the area of cross conveyors. The shots come into standard cleaning system and into the shot blasters.
Additional equipment
Technical specifications
| # | Index | Type | |
| KD-5 | KD-8 | ||
| 1. | Dimensions of the chamber (inside), mm | 18060х6000х6000 | 28800х6000х7500 |
| 2. | Dimensions of the chamber (outside), mm | 18200x9100x6655 | 29000x9500x7500 |
| 3. | Pit depth for the elevator, mm | 1500 | 1500 |
| 4. | Productivity (9.5 nozzle), m²/h | 42 | 84 |
| 5. | Compressed air consumption with 9.5 mm nozzles and 0.8 MPa pressure, m³/min | 12 | 24 |
| 6. | Amount of operators | 2 | 4 |
| 7. | Adjusted power, kW | 26 | 30 |
| 8. | Air suction volume, m³/h | 14000 | 28000 |
| 9. | Weight of the chamber, Tonnes | 42 | 70 |
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Additional equipment
Articles
- Shot blasting equipment: purpose, types, characteristics
- Overview of popular shot blasting equipment models
- Removal of abrasive residue and dust after shot blasting | Surface preparation for painting
- Evaluation of dust content of steel surfaces before painting – ISO 8502-3
- Preservation lines: shot blasting and painting in one solution