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Rail Traffic and Auto Spare Parts

Why Choose Us

Production Equipment

Shengfa has more than 3,000 dies, 630MT, 830MT, 1250MT,1600MT, total 4 extrusion lines, 2 sets of sandblasting machines, 6 sets of plane sawing machines, 3 sets of double end sawing machines, 1 set of 4.5m CNC machine, 2 sets of 850mm CNC machines, 8 sets of punching machines, 2 sets of tapping machines and 1 oxidation line.

Rich Experience

Shengfa covers an area of 5,000m2, have 15 years experience in aluminium extrusion profiles, with 8000MT annual production capacity, can provide aluminium extrusion profiles, semi-finished components, semi-finished systems and finished products.

Product Market

Shengfa is raw material supplier of heatsink for American NEV in China, raw material supplier of on-off control for germany brand, exported to Japan, Malaysia and other Southeast Asian countries.

OEM / ODM Services

Shengfa provides OEM and ODM services according to DIN EN, ASTM, GB/T standards and customer requirements.

Our Company Provides The Rail Traffic And Auto Spare Parts Following Products:

Size of Exhaust Pipe

Length of joint bar

Specified based on the rail length and desired overlap.

Width of joint bar

Determined by the rail web width and required clamping force.

Thickness of joint bar

Should provide sufficient strength while considering weight limitations.

Bolt hole diameter and spacing

Precise dimensions for proper bolt fit and load distribution.

Performance Requirements of Exhaust Pipe

Load bearing capacity

Ability to withstand the maximum anticipated train loads without failure.

Fatigue resistance

Design to resist fatigue cracks due to repeated loading cycles.

Wear resistance

Sufficient hardness on contact surfaces to prevent excessive wear over time.

Thermal expansion allowance

Gap between rail ends to accommodate temperature fluctuations.

Installation Specifications of Exhaust Pipe

Fastening method

Details on the type of fasteners (bolts, spikes, or clips) and their tightening torque requirements.

Alignment tolerances

Acceptable deviations in rail alignment at the joint.

Joint spacing

Distance between adjacent joints based on track design and stability requirements.

Advantages of Rail Joint Construction

High strength, good abrasion resistance and high impact resistance

Welded joints for rail connections are characterised by high strength, abrasion resistance and high impact resistance, enabling them to maintain good performance in a variety of harsh environments.

Easy to use

Certain rail jointing technologies, such as aluminium thermal welding without external power supply, are suitable for rapid on-site welding and are relatively easy to use.

High adaptability

Expansion joints (thermostats) are suitable for tracks with a large amount of rail end expansion, such as tracks on bridges with spans of more than 100 metres and seamless line expansion zones on bridges, which can effectively cope with the expansion and contraction of the track caused by temperature changes.

Convenient maintenance

Track joints are relatively easy to maintain. For example, the shortening joints are fixed with nuts, which is very easy to maintain. The welded joints formed by aluminium heat welding technology have high strength and are not easy to loosen or wear out, reducing the need for maintenance.

Ease and efficiency of construction

The construction process of rail joints is relatively simple and quick. For example, shortened joints are fixed with nuts, which are quick to install and cause little disruption to traffic. Aluminium thermal welding joint technology melts the end of the rail through the high temperature generated by the thermal reaction of aluminium to form a welded joint.

Applications Areas of Rail Joint Construction

Railway construction

Track joints are widely used in railway construction, especially in stations, tunnels, bridges and other projects. They can adapt to complex environmental conditions and complicated route layouts to ensure the connection and stability of the track.

Underground construction

In underground construction, track joints are used in underground tunnels, stations, overpasses and other places, which can improve the stability and comfort of underground operation.

Bridge construction

Expansion joints are also widely used in bridge construction, which can solve the problem of bridge expansion and ensure its stability. Expansion joints are also suitable for other engineering fields, such as reservoirs, wharves, docks and other occasions.

Light railway and urban railway

Aluminium heat welded joints are widely used in these fields to improve the smoothness of the track by eliminating rail joints, improve the comfort of passengers travelling and reduce the noise and vibration of train operation.

Types of Rail Joint Construction

Supported Rail Joints
When the rail ends rest on a single sleeper called a “joint sleeper” it is termed a “supported joint”. The duplex joint sleeper with other sleepers is an ample of the supported joint. Three sleeper supports (as shown in Fig. 1.) with long fish plates, i.e., combined supported and suspended joints are most objectionable. In this case,e when the packing under the outer sleeper gets loose, undue load comes on the central sleeper and in turn the loose central sleeper converts this joint into a weak suspended joint.

Suspended Rail Joint
When rail ends are projected beyond sleepers called “shoulder sleepers” it is termed as suspended joint (as shown in Fig). This type of joint is generally used with timber and steel trough sleepers on Indian and foreign railways.

Bridge Joint
When the rail ends are projected beyond sleepers as in the case of a suspended joint and they are connected by a flat or corrugated plate called a “bridge plate”, it is termed as a bridge joint. This type of joint is not used on Indian Railways (Fig).

Base Joint
This is similar to the bridge joint, with the difference that the inner fish plates are of bar type and outer fish plates are of the special angle type, in which the horizontal leg is further extended over the sleepers to be bolted to both bridge plate and sleeper. Due to complicated design, this is not generally used.

Welded Rail Joints
Since they meet almost every condition for an ideal or flawless joint, they are the best joints.
In railway tracks, welded rail joints are utilized to create a continuous, seamless rail that enhances durability, safety, and comfort. Unlike conventional fish-plated joints, welded joints close the spaces between rail sections, lowering impact loads and maintenance needs.

Staggered Or Broken Joint
In this, the position of joints on the railway tracks is the basis of its nomenclature. In this type of joint, the joints of one rail track are not directly opposite to the joints of the other rail track (Fig). These joints are generally provided on curves, where the length of the outer curved track is greater than the length of the inner curved track.

Square Or Even Joint
In this also, the position of the rail joint is the basis of its nomenclature, the joints of one rail track are directly opposite to the joints of another rail track.
This type is generally used on straight tracks.

Compromise Joint
Where two different rail sections are required to be joined together. it is done by means of fishplates which fit both rails and this joint is termed as compromise joint.

Insulated Joint
When an insulating medium is inserted in a rail joint to stop the flow of current beyond the track-circuited part, it is called an insulated joint.

Expansion Joint
An insulated joint is created by inserting an insulating material into a rail joint to prevent current flow past the track-circuited portion. This gap is 2.2 cm in the case of the “mitred” joint and 7.2 cm for the “Halved Joint”.
Experiments carried out in India have revealed that comparatively, in view of stresses produced in rails and fish plates, the wooden sleepers are best for joints. They produce less stress in rails and fish plates, and their performance, from the viewpoint of deflection, and maintenance of gauge and cross levels, is found to be the best. Duplex sleepers, however, produce minimum deflection.

Chemical Composition of Exhaust Pipe

Alloy	Si	Fe	Cu	Mn	Mg	Cr	Zn	Ti	Others	Al(Min)
6063	0.2-0.6	0.35	0.1	0.1	0.45-0.9	0.1	0.1	0.1	0.15	Rest

Mechanical Properties of Exhaust Pipe

Alloy	Temper	Thickness	T.S./σb (MPa)	Y.S/σ0.2 (MPa)	ELOG./δ%	Hardness/HW
6063	T5	≥ 0.8	≥160	≥110	≥8	≥8
6063	T6	≥ 0.8	≥205	≥180	≥8	≥10

Parameters of Exhaust Pipe

productcate-719-481

Advantages of Exhaust Pipe

Noise reduction: The muffler inside the exhaust pipe effectively reduces the noise generated by the engine during operation by redirecting the airflow and friction, reducing the disturbance to the environment and people.

Reducing environmental pollution: The three-way catalytic converter in the exhaust pipe can convert harmful gases such as carbon monoxide, hydrocarbons and nitrogen oxides produced in the combustion process of the engine into harmless gases, thus reducing environmental pollution.

Improve fuel efficiency: Good exhaust design can improve engine combustion efficiency, reduce fuel consumption and improve fuel economy.

Ensure safety: The normal operation of the exhaust system can ensure that the engine in emergency braking or flame out, the combustible mixture in the combustion chamber can be smoothly discharged to prevent the occurrence of fire accidents.

Engine life extension: The good working condition of the exhaust system helps to keep the engine clean, reduce the damage of carbon and other impurities on the engine, thus extending the life of the engine.

Enhance the driving experience: The exhaust system helps to reduce the vibration of the vehicle in the process of driving through the structural design, improve the driving stability and provide a comfortable ride.

Reduce vibration and shock: The exhaust hose can absorb and compensate the thermal expansion and contraction of the exhaust manifold, reducing the damage of vibration and shock to the exhaust system and extending its service life.

Resistant to high temperature and salt corrosion: The exhaust hose is made of high temperature and salt corrosion resistant materials, such as sus304 stainless steel, to adapt to the harsh environment.

Elimination of engine noise: The muffler and compensators inside the exhaust hose can effectively eliminate engine noise and provide a quieter driving environment.

Types of Exhaust Pipe

Single exhaust pipe

A single exhaust pipe is the most common type of exhaust pipe found on vehicles. It consists of a single pipe that carries the exhaust gases from the engine to the tailpipe. Single exhaust pipes are usually less expensive and easier to install than other types of exhaust pipes. They are also generally quieter than other exhaust systems. However, they may not provide the same level of performance as other types of exhaust pipes.

Dual exhaust pipe

A dual exhaust pipe system is made up of two pipes that carry the exhaust gases from the engine to the tailpipe. Dual exhaust pipes are often used on high-performance vehicles as they provide better exhaust flow, which can result in improved horsepower and torque. They also tend to produce a more aggressive exhaust note. However, dual exhaust systems are generally more expensive and more challenging to install than single exhaust systems.

Y-pipe exhaust

A y-pipe exhaust system is a type of exhaust system that consists of a y-shaped pipe that connects to the exhaust manifold. The y-pipe then splits into two pipes that carry the exhaust gases to the tailpipe. Y-pipe exhaust systems are similar to dual exhaust systems in that they provide improved exhaust flow, resulting in better performance and a more aggressive exhaust note. However, they may be more expensive and more challenging to install than single exhaust systems.

H-pipe exhaust

An h-pipe exhaust system is a type of exhaust system that consists of an h-shaped pipe that connects to the exhaust manifold. The h-pipe then splits into two pipes that carry the exhaust gases to the tailpipe. H-pipe exhaust systems are similar to y-pipe exhaust systems in that they provide improved exhaust flow. However, h-pipe exhaust systems are designed to reduce exhaust drone and produce a more balanced exhaust note.

X-pipe exhaust

An x-pipe exhaust system is a type of exhaust system that consists of an x-shaped crossover pipe that connects the two sides of a dual exhaust system. X-pipe exhaust systems are designed to equalize exhaust flow between the two sides of the engine, resulting in improved performance and a more balanced exhaust note. They are generally more expensive and more challenging to install than other types of exhaust systems.

Our Services

In sales, we will follow up production and inform customers of progress

Pre-sale

We can design and render drawings, offer suggestions according to customers’ requirements

After sales

We will help customers arrange delivery, make documents for customers.

Our Certificate

Supply Ability

The company conducted a competitive advantage analysis to identify its strengths and weaknesses compared to its rivals.

Raw material

6063 aluminum alloy

MOQ

500kg

Color

Black/Silver/Custom

Payment method

Telegraphic transfer or letter of credit

Delivery terms

Negotiable

FAQ

Q: Please quote on rail joint .

A: Can you please supply the drawings of full sizes with detailed technical specifications of the wanted rail joint, to match our available drawings whether totally same or not.

Q: We need the delivery time.

A: It depends on whether the mould available. If with available mould, we can start to produce any time with 40-ton daily apacity. If without available mould, it takes 10 days to develop the mould after receiving prepayment

Q: Will that be possible for us to receive pieces of samples for approval?

A: Sure. The samples can be supplied for free but the freight counts on you.

Q: What's the packing way?

A: Bundled in steel strips with iron/wood pallets.

Q: Payment term?

A: 30% prepayment, and the balance 70% against B/L copy,L/C or negotiable.

Q: How long will it be the quotation valid?

A: The validity is 15 days in general, but also depends on the quantity and special conditions. It will be shown in every quotation.

Q: What is MOQ?

A: 20’’ container in general, depending on whether enough stocks available for small quantity; customized products accepted.

Q: Do you have any certifications regarding rail joint construction?

A: We have passed the certification of CRCC in China and ISO9001:2008 overseas. Before shipment, Certificate of Quality can be supplied. We also accept Third Party Inspection from clients, with free samples to supply.

Q: Can I have a sample for testing?

A: Yes of course. For standard profiles we would like to provide our samples, but normally 10cm length sample. And for customized profiles, we will provide samples once the moulding is finished(generally 15 days). If you have specified length for profiles, please let us know at the beginning.

Q: Can I add my logo on the profiles or packing?

A: Yes, OEM and ODM are both available for us. But you should send us the Trademark authorization letter.

Q: How can I do if I couldn't reach the MOQ?

A: Best price based on big quantity. For commonly produced standard profiles we usually require MOQ is 300kg, you will have to pay production fee for MOQ is lower than 300kg. As to the customized profiles, we require MOQ is 500kg. In addition, for not commonly produced standard profiles, we will request you MOQ 500kg as well.

Q: Do you have inspection procedures for profiles?

A: Yes. 100% self-inspection before shipment.

Q: Can we mix the 20ft container?

A: Yes, as long as the items meet our MOQ.

Q: Can I visit your factory before the order?

A: Sure, welcome to visit our factory at any time. Our factory is near Shanghai Pudong Airport and Hongqiao Airport. We can pick you up in the airport. Hotel booking service is also available.

Q: Can I drive with a bad exhaust pipe?

A: It generally isn't a good idea to drive with a broken exhaust pipe. Besides the toxic fumes and potential for fire, the ride itself will likely be uncomfortable. That being said, you might be able to drive a few hundred miles if the leak is small. If your broken exhaust pipe has a large leak, it's best not to risk it.

Q: What is the life expectancy of an exhaust pipe?

A: Depending on the make and model, how you drive, the environment it's exposed to and regular maintenance checks; car exhausts can last the lifetime of the car.

Q: How long does it take to fix an exhaust pipe?

A: The time it takes to fix an exhaust pipe depends on the extent of the damage and the parts that need to be replaced. A simple muffler replacement can take 30–60 minutes, while a full exhaust system replacement can take 2–4 hours.

Q: Should I clean my exhaust pipes?

A: Because the system's pipes transport harmful fumes away from the engine and the cabin, it is crucial that they are clean and cleared. Clean exhaust tips also help reduce emissions and noise, so you'll enjoy a quieter ride and Mother Nature will benefit too!

Q: How often do you need to replace exhaust pipes?

A: As a rough rule of thumb, however, a typical life expectancy of a premium aftermarket exhaust system should be in the neighborhood of two to three years depending on driving habits and the previously mentioned factors. Read on to learn why the exhaust system can wear out.

Q: What is the best cleaner for exhaust pipes?

A: In our experience, the best, fastest, least-expensive way to scrub exhaust tips is to use a soap that includes a mild polish abrasive. Our favorite product for this task is P21S Polishing Soap. P21S Polishing Soap contains a mild abrasive polish that's perfect for the carbon on exhaust tips.

As one of the most professional rail traffic and auto spare parts manufacturers in China, we're featured by quality products and low price. If you're going to buy cheap rail traffic and auto spare parts for sale, welcome to get quotation and free sample from our factory. Also, customized service is available.

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