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Gnee Rails Logo

Railway Fastening System Manufacturer

As a professional manufacturer certified by ISO and EN, Gnee Rails is committed to providing highly reliable fastening solutions for high speed, heavy-haul railways and urban rail transit worldwide. We supply a full range of standard rail fastening systems including SKL, KPO, WJ and also possess strong customization capabilities, enabling precise design and production for complex geological and extreme climatic environments.

With over 20 years of experience delivering international projects, we understand that the reliability of fastening systems directly impacts operational safety and maintenance budgets. Gnee utilizes high-strength, corrosion-resistant materials and rigorous pressure testing processes to ensure superior fatigue resistance and anti-creep performance, significantly reducing long-term maintenance costs while improving track stability. We offer environmentally friendly, cost-effective products and comprehensive after-sales support, making us an ideal partner for railway construction, operation, and maintenance projects.

certificate

Additional information

Quality Control Process

Raw material testing; First product manufactured inspection; Inspection during production; Inspection to finished products

Quality testing items

Chemical composition; Physical properties test: 1. Tensile strength, yield strength and elongation, 2. Bending, 3. Hardness, 4. Metallographic analysis; Impact inspection; Anti-corrosion property testing; Dimensional and appearance quality

Railway Fastener System Models

Product Classification

These are product classification of Gnee’s railway fastening system. 

E clip rail fastening system

E-clip rail fastening system can be used for almost all kinds of tracks, including high-speed rail tracks, heavy-duty rail tracks, light rail, industrial rail, and the reconstruction and maintenance of existing rails.

E clip rail fastening system

Item included

Quantity

Material

Size

Remark

E clip

2

60Si2MnA, 60Si2CrA

Dia. 16mm,18mm or 20mm (E1809, E2006,E2007,E2009,etc

Hardness: 44-48HRC

Toe Load: Dia.16mm: 500-700kgf; Dia.18mm:750-900kgf; Dia.20mm:1100-1400kgf

Fatigue life: 5 millions cycles without breaking

Standard: DIN17221, BS970, GB/T1222

Shoulder

2

QT500-7, QT450-10

For UIC54, UIC60, 115RE, BS80lbs, BS100lbs, 50kg rail, 60kg rail, etc.

Note: Hardness of E-clip is 44-48HRC; Toe Load for E-clip is 500-700kgf (Dia.16mm); 750-900kgf(Dia.18mm); 1100-1400kgf(Dia.20mm); Fatigue life of E-clip is 5 millions cycles without breaking DIN17221, BS970, GB/T1222 qualified E-clip

Rail pad

1

HDPE, rubber or EVA

Insulator

2

Reinforced Nylon 66 (PA66)

KPO Rail Fastening System

It is widely used in various standard gauge railway trunk lines, including ordinary railways, heavy-load railways, etc., and can adapt to different types of rails such as UIC54, UIC60, 50kg rails, 60kg rails, etc.

KPO Rail Fastening System

Component

Quantity

Type

Material

KPO Clip

2

KPO3, KPO6, KPO9

Q235

Screw Spike

4

M24×150mm, M24×160mm, M24×180mm

Grade 4.6: Q235; Grade 5.6: 35#; Grade 8.8: 45#

HS Bolt

2

HS26, HS32

Grade 4.6: Q235; Grade 5.6: 35#; Grade 8.8: 45#

Hexagon Nut

2

Customizable

Grade 5: 35#; Grade 8: 45#

Double Coil Spring Washer

2

Customizable

65Mn

Base Plate

1

Customizable

Casting: QT500-7, QT450-10; Forging: Low-carbon Steel or High-carbon Steel

SKL Clip Rail Fastening System

Gnee SKL tension clip adopts high-quality materials and special design, which can provide sufficient buckling pressure to ensure the tight connection between rails and sleepers, ensure the stability and safety of the track, and also reduce the maintenance cost of the track.

SKL Clip Rail Fastening System

Component

Quantity

Material

Size

Remarks

SKL Tension Clip

2

60Si2Cra

Diameter: 13mm

Hardness: 42 – 47HRC

Fatigue life: No fracture after 5 million cycles

Standards: DIN 17221, GB/T 1222

SS35 Screw Spike

2

M24×150mm, M24×160mm, M24×180mm or customized

Grade 4.6: Q235; Grade 5.6: 35#; Grade 8.8: 45#

Standards: ISO 898-1, UIC 864-1 and NF F 500-50

Can be inserted into concrete sleepers

Flat Washer

2

ULS7

/

/

Plastic Dowel

2

Determined according to the size of the screw spike

HDPE

/

Guide Plate

2

Reinforced Nylon 66 (PA66)

UIC54, UIC60, 50kg rail, 60kg rail or customized

/

Rail Pad

1

EVA or Rubber

UIC54, UIC60 or customized

/

High-speed Railway System

High-speed railway tracks usually rely on railway fastener systems to adjust the accuracy of ballastless tracks. Gnee’s high-speed railway fastener system products coordinate the safe and efficient operation of high-speed railway trains. Our main high-speed railway fastener system products include spring clip IV fastener system, spring clip V fastener system, WJ-7 fastener system and WJ-8 fastener system, etc. These fastener systems can be used on tracks with speeds of 250 km/h-350 km/h.

High Speed WJ-7 Rail Fastening System

High Speed WJ-8 Rail Fastening System

High Speed Type V Fastening System

Item

Quantity

Material

Item

Quantity

Material

Item

Quantity

Material

Rail clip

2

60Si2MnA

Rail clip

2

60Si2MnA

Rail clip

2

60Si2MnA

T-bolt nut washer

2

Q235A

Screw spike

2

20MnTiB

Screw spike

2

20MnTiB

Rail insulator

2

PA66
Material

Flat washer

2

Q235A

Flat washer

2

Q235A

Tie plate

1

QT450-10

Rail insulator

2

PA66

Space pieces

2

Q235A

Insulated buffer plate

1

Rubber

Guide plate

2

Reinforced Nylon 66 (PA66)

Gauge apron

2

Rubber

Rail pad

1

EVA, or rubber

Rail pad

1

EVA, or rubber

Rail pad

1

EVA, or rubber

Anchor bolt

2

Q235A

Tie plate

1

QT450-10

Adjustable pad

1

PE

Spring washer

2

60Si2Mn

Plastic dowel

2

HDPE, Reinforced Nylon 66 (PA66)

Plastic dowel

2

HDPE, Reinforced Nylon 66 (PA66)

Plain washer

2

QT450-10

Rail adjustable pad

2

PE

Plastic dowel

2

HDPE, Reinforced Nylon 66 (PA66)

Tie Plate adjustable pad

2

PE

 

Product Description

Rail fastening system are mainly used to fix the rails to the rail base, ensuring that the rails do not move or fall off when the train passes. They can also absorb and reduce the vibration and noise generated when the train passes, and maintain the safety of the railway line.

As a professional rail fastening system manufacturer and supplier, Gnee provides complete fastening systems in railway for concrete, wood, composite sleepers, steel and precast blocks, ballastless concrete slab tracks, and provides support for global railway operators and rail fastening dealers.

According to the bearing capacity of the track, the rail track fastening systems produced by Gnee can be divided into different types, mainly high-speed rail fastening systems, heavy-duty rail fastening systems, urban transportation rail fastening systems, etc., including fast fastening systems, elastic clip fastening systems, KPO fastening systems, etc. The common characteristics of these rail fastening systems are high strength, durability, strong applicability, and compliance with current national standards and specifications.

rail-fastening-systems-show

Application Of Railway Fastening System

The design of fastening systems is adjusted according to different railway operating conditions:

  1. High-speed Railways: Typically use low-resistance fasteners to control the expansion and contraction stress of the rails caused by temperature changes. Extremely high elasticity and fatigue strength are required to withstand high-speed impacts. Mostly used in ballastless tracks (such as concrete track slabs).
  2. Heavy-haul Railways: Use heavy-duty fasteners to provide greater fastening force than ordinary lines, preventing rail overturning or creeping under heavy loads. Robust structure and high wear resistance.
  3. Ordinary Passenger and Freight Railways: The most widely used type, such as China’s Type II and Type III elastic rail fasteners, balancing performance and cost.
  4. Urban Rail Transit (Metro, Light Rail): Extensive use of elastic fasteners, and even specially designed vibration-damping fasteners (such as cloning eggs, trapezoidal sleepers, etc.), to reduce the impact of vibration and noise on the underground and along the line environment.

Special Sections:

  1. On Bridges: Low-resistance fasteners may be used to accommodate the interaction between the bridge and the rails.
  2. Turnout area: Special turnout fasteners are used, with a more complex structure to accommodate the complex sleeper layout and stress conditions within the turnout area.
  3. High-altitude/cold regions with large temperature differences: Materials must be resistant to low temperatures, and the design must consider greater temperature deformation.

 

Additional information

Quality Control Process

Raw material testing; First product manufactured inspection; Inspection during production; Inspection to finished products

Quality testing items

Chemical composition; Physical properties test: 1. Tensile strength, yield strength and elongation, 2. Bending, 3. Hardness, 4. Metallographic analysis; Impact inspection; Anti-corrosion property testing; Dimensional and appearance quality

Composition of Railway Fastening Systems

These are main fasteners of a railway track fastening systems. Gnee provide all of these fasteners:

Elastic Components

railway-clips

This is the most critical part of the system, responsible for providing continuous clamping force to prevent longitudinal creep and lateral displacement of the rail.

  • Elastic Clip: Such as SKL series clips (SKL1, SKL12, SKL14, etc.), PR series clips, fast clips.
  • KPO Clamp: Primarily used in KPO type fastening systems, the clip is tightened with bolts to secure the rail.
  • Leaf Spring: Commonly found in Nabla fastening systems.

Connecting Components

Anchoring Elements

  • Railway Screw/Screw Spike: Screwed into the sleeper to provide vertical tension.
  • Rail Bolt: T-bolt/hook Bolt. Used in conjunction with spring clips or clip plates to transmit clamping force to the bottom of the rail.
  • Dowel/Thread Sleeve: Pre-embedded in the concrete sleeper for screwing in the threaded spike, providing insulation and protection for the sleeper.

Support and Insulation Components

Support and Insulation Components

These components do not directly bear tensile forces, but are crucial for maintaining track gauge, providing insulation and conductivity, and damping vibrations.

  • Gauge Buffers/Guide Plates: Used to adjust the track gauge and support the end of the spring clip, transmitting lateral horizontal forces.
  • Insulators: Located between the spring clip and the rail, or between the spring clip and the rail, preventing leakage of track circuitry.
  • Rail Pads: Placed between the bottom of the rail and the sleeper (or base plate), providing shock absorption, cushioning, and insulation. The material is typically rubber or composite plastic.

Auxiliary Connectors

Auxiliary Connectors

  • Plain Washer: Distributes bolt pressure and protects component surfaces.
  • Spring Washer: Increases the anti-loosening performance of threaded connections.
  • Tie Plate/Base Plate: In some heavy-duty or special systems, the rail is not placed directly on the sleeper, but first on a tie plate, which is then secured to the sleeper.

Advantages of Gnee Railway Fastening System

Enhanced Track Stability – Safer
One of the key benefits of Gnee track fastening technology is enhanced track stability. Our fastening systems provide consistent clamping force, which reduces track movement and maintains track gauge. The increased stability not only improves safety, but also allows for higher train speeds and greater loads.
Gnee’s fasteners are designed to withstand dynamic forces and thermal expansion, ensuring that tracks remain secure and aligned even under extreme conditions.

Noise Reduction Innovations – Quieter
Components such as track pads and insulators are specifically designed to dampen vibrations and reduce the noise generated by trains passing through. This is especially important in urban areas where noise pollution can be a major issue.
Gnee’s use of advanced materials and innovatively designed fastener systems help create a quieter, more comfortable travel experience for passengers while minimizing impacts on nearby communities.

Improved Durability – Longer Service
Gnee fasteners are typically made from high-strength materials that are resistant to wear, corrosion, and fatigue. The innovative design of the components ensures that they maintain clamping force longer, reducing the need for frequent maintenance.
Enhanced durability means lower lifecycle costs because the track fastening system requires fewer replacements and repairs. This makes Gnee’s fastening technology a cost-effective solution for modern rail infrastructure.

By adopting these revolutionary rail fastening technologies, modern rail systems can achieve unprecedented efficiency, safety and reliability.

Quality Control Of Gnee

Qualifications and Systems

Gnee has always regarded “quality certainty” as the lifeline of the company. In the development of railway equipment, we deeply implement the ISO9001-2015 international quality management standard and have officially obtained a railway product manufacturing license.

Strict Quality Control
To ensure that every fastener delivered to our customers meets contractual requirements, Gnee has established a three-pronged quality assurance system:

  • Supplier Traceability System: A strict entry mechanism is implemented. All raw materials must be accompanied by chemical composition and mechanical performance reports and undergo sampling verification by our laboratory. Those that do not meet the standards are resolutely rejected.
  • Standardized Production Process: We possess advanced production lines for automated casting, rolling, and spring clip forming. From physical performance testing to salt spray corrosion testing, data is monitored in real time to ensure consistent quality.

Multi-Standard Compatible Manufacturing Capabilities

Due to our deep understanding of multiple international standards such as ASTM, DIN, BS, and JIS, Gnee Rails products are capable of operating in the global railway market. We regularly undergo inspections by internationally recognized testing organizations such as SGS, BV, and ABS to ensure that every order accurately meets local route requirements.

Three-Year Warranty Commitment

We promise to provide a three-year quality guarantee. If any non-human-caused manufacturing defects occur within the warranty period, we promise to complete the return or exchange within 60 days of receiving notification, completely eliminating any concerns for our customers.

Why Choose Gnee Rail Fasteners?

As a world-leading manufacturer of rail fastener systems, Gnee Rail Fasteners has 18 years of professional experience, an annual production capacity of 10 million sets, and its products are exported to more than 60 countries. We have built 5 production bases, equipped with 400 technicians, and annual R&D investment exceeds 5% of revenue.

Our products have been used in more than 2,000 railway projects, with a total of 50,000 kilometers of track laid, covering more than 100 high-speed rail projects. From -40℃ to 80℃, the product performance remains stable and reliable. With strict quality control and professional technical support, more than 85% of our customers maintain long-term cooperation with us, and customer satisfaction continues to remain above 93 points.

Professional packaging

  • Adopting 5-layer reinforced protective packaging system, moisture-proof performance reaches 99%
  • Each box load-bearing test reaches more than 1000kg
  • Unique shockproof lining can reduce 90% of transportation vibration
  • Each product is equipped with RFID smart traceability label, which can be traced 24 hours a day

Strict product testing and inspection

  • Possessing 8 international certifications including ISO9001
  • Testing equipment with an accuracy of 0.001mm
  • Fatigue testing with over 3 million cycles
  • Annual testing capacity with over 5 million sets of fasteners
  • All products are 100% non-destructively tested with X-rays

Rich successful cooperation cases

  • Established partnerships with railway companies in more than 60 countries
  • Annual average repeat order rate reaches 85%
  • Customer satisfaction survey score is more than 93 points
  • The longest partnership lasts more than 15 years

Adequate inventory guarantee

  • The standing inventory is maintained at more than 3 million sets.
  • 48-hour fast delivery service for spot goods.
  • The storage area is 20,000 square meters.
  • The inventory turnover rate is controlled at 45 days.
  • The ERP system monitors inventory in real time with an accuracy rate of 99.9%.

Wide range of global engineering applications

  • Products are used in more than 2,000 railway projects around the world
  • High-speed rail projects covering 35 countries
  • Cumulative track mileage exceeds 50,000 kilometers
  • Product service life is more than 18 years
  • 24/7 global technical support team, response time <2 hours

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