1.China: Complies with standard TB/T 3395.4-2015. This fastening system is suitable for 60 kg/m (P60) rails and ballasted track concrete sleepers.
2.Other Countries: Complies with standard EN 13481-5 D. It can be applied to any I-shaped rail based on line operating conditions and gauge requirements.
Configuration Table and Description of Fastener Components for Individual Node
| No. | Item | Specification | Quantity/Pcs | Material | Description | |
| 1 | Tension Clamp | W1 | 2 | 60Si2Mn/Other Hot-Rolled Spring Steel | Clamping Force：≥ 9kN | |
| X2 | 2 | ①Clamping Force：≥ 3kN；
②Used in conjunction with a composite pad. |
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| 2 | T Bolt | T1 | 2 | Q235-A | When fastening the elastic clip, lubricating oil must be applied to the threaded part; lubricating oil may also be applied to the dowel. | |
| 3 | Nut | M24 | 2 | Q235-A | ①GB/T 41-2016
②When fastening the tension clip;if the T-bolt thread is unoiled, the nut must be lubricated. |
|
| 4 | Flat Washer | – | 2 | Q235-A | TB/T 1495-2020 | |
| 5 | Insulating Block | WJ7-Ⅰ | 2 | PA66+30%GF | ①Water Drainage Rate：≥ 0.5%；
②Plastic Rockwell Hardness：≥ 105HRR ③Shear Resistance: No rupture after applying 4.5 kN shear force to both ears. ④Impact Toughness: No rupture after 6 impact tests. ⑤Internal Voids: No bubbles or voids allowed |
|
| 6 | Rail Pad | Rubber Pad | WJ7-A | 1 | Rubber | ① Static Stiffness：A—35±5kN/㎜，B—25±5kN/㎜；Dynamic and Static Stiffness Ratio：≤ 1.5；
②Peel Strength of the Compound Pad R：≥ 4kN/m； ③shore A：≥ 65； ④Can also be designed to meet specific static stiffness requirements as needed. |
| WJ7-B | 1 | |||||
| Compound Pad | CWJ7-A | 1 | Rubber+Stainless Steel Pad | |||
| CWJ7-B | 1 | |||||
| 7 | Rail Gauge Baffle | WJ7 | 1 | QT 450-10 | ①Tensile Strength Rm：≥ 450MPa，Elongation after Fracture A：≥ 10%；
②Metallographic Structure: Spheroidization Grade ≥ 3 |
|
| 8 | Insulation Buffer PAD | WJ7-6 | 1 | Rubber and Plastics | ①Insulation Resistance：≥1×109Ω；
②Static Stiffness：≥ 1000kN/㎜ |
|
| 9 | Anchor Bolt | B1 | 2 | Q235-A | When fastening，lubricating oil must be applied to the threaded part; lubricating oil may also be applied to the dowel. | |
| 10 | Heavy Spring Washer | D30 | 2 | 65Mn | GB/T 7244-1987 | |
| 11 | Flat Washer Block | WJ7 | 2 | QT 450-10 | ||
| 12 | Embedded Dowel | D2 | 2 | PA66+30%GF | ①Tensile Performance: The component shall sustain no damage after being subjected to a 150 kN tensile test.
②When fastening，If the anchor bolt is not lubricated, a small amount of lubricating grease must be injected into the dowel. |
|
| 13 | Rail Height Adjustment Pad | WJ7-X | – | HDPE | Selected for height adjustment. | |
| 14 | Rail Tie Pad Height Adjustment Pad | WJ7-X | – | Rubber and Plastics | ①Insulation Resistance：≥1×109Ω；
②Static Stiffness：≥ 1000kN/㎜； ③Selected for height adjustment. |
|
Indicators of Type WJ-7 Fastening System
| Execution Standards | China | TB/T 3395.4-2015 | Type WJ-7 Fastening | |||||||||
| Other Countries | EN 13481-5 D | Railway applications – Rail -Performance Indicators of fastening system concrete sleepers fastening system | ||||||||||
| No. | Items | Performance Indicators | ||||||||||
| China | Test Method | Other Countries | Test Method | |||||||||
| 1 | Maximum axle load | 26t | ||||||||||
| 2 | Minimum curve radius | R600m | R400m | |||||||||
| 3 | Speed | 350km/h | ＞ 250km/h | |||||||||
| 4 | Longitudinal rail resistance | Normal Line | ≥ 9kN | TB/T 3396.1-2015 | Normal Line | ≥ 9kN | EN 13146-1 | |||||
| Low Resistance Line | 4±1kN | Low Resistance Line | 4±1kN | |||||||||
| 5 | System clamping force | Normal Line | ≥ 18kN | TB/T 3396.2-2015 | Normal Line | ≥ 18kN | EN 13146-7 | |||||
| Low Resistance Line | ≥ 6kN | Low Resistance Line | ≥ 6kN | |||||||||
| 6 | System Fatigue Performance | Dual rail gauge | ≤ 6㎜ | TB/T 3396.4-2015 | / | ≤ 6㎜ | EN 13146-4 | / | ||||
| Resistance change rate | ≤ 20% | TB/T 3396.1-2015 | ≤ 20% | EN 13146-1 | ||||||||
| Vertical stiffness | ≤ 25% | TB/T 3396.3-2015 | ≤ 25% | EN 13146-9 | ||||||||
| Clamping force change rate | ≤ 20% | TB/T 3396.2-2015 | ≤ 20% | EN 13146-7 | ||||||||
| 7 | Insulation Resistance | ≥ 5kΩ | TB/T 3396.5-2015 | ≥ 5kΩ | EN 13146-5 | |||||||
| 8 | Effect of exposure to severe environmental conditions | Smooth disassembly | TB/T 3396.6-2015 | Smooth disassembly | EN 13146-6 | |||||||
| 9 | Proof load test for pull-out resistance | ≥ 100kN | TB/T 3396.7-2015 | ≥ 100kN | EN 13146-10 | |||||||
| 10 | Gauge adjustment range | ±12㎜ | ||||||||||
| 11 | Level adjustment range | -4～+26㎜ | ||||||||||
SAFE Rail Fastening System (Zhejiang) Co., Ltd. is a leading manufacturer of rail fastening systems, with a total investment exceeding 50 million RMB and a factory area of over 50,000 ㎡. Strategically located in Zhejiang Province—China’s manufacturing hub—we specialize in providing high-quality rail fastening solutions for global markets.
The company is situated in Zhejiang Province, the heart of China’s manufacturing sector. This strategic location enables efficient access to supply chains, logistics networks, and industrial resources, supporting timely delivery of high-quality products to domestic and international customers.
Our annual output of rail fastening systems reaches 5 million sets, meeting large-scale project demands.
We operate an automated 3D warehouse with a storage capacity of 30,000 tons, ensuring efficient inventory management and product storage.
Our specialized production lines and laboratories are equipped with over 100 sets of advanced international automation and testing equipment. This ensures that every product adheres to the highest industry standards.
We comply with international standards including ISO 9001 (quality management), ISO 14001 (environmental management), and ISO 45001 (occupational health and safety management).
