TDD HOME
Service
Shipping Logistics
Warehouse Services
Expo Services
Help Center
Supplier
Supplier Service
Supplier Center
Supplier Register
Investment Promotion
FAQ
Contact Us
English
English
Русский язык
Post My RFQ
Sign In
/
Join
Shopping Cart
Mall
Vehicles
Locomotive
Passenger cars
Bus
Truck
Container
Emergency Vehicle
Golf cart
Motorcycle and Bicycle
Special Transportation Vehicle
Train Cabin
Tricycle
ATV & UTV
Tyre
Natural Rubber
Passenger Car Tyres
Truck & Bus Tyre
Off-The-Road Tyre
Agricultural Tyre
Industrial tires
Motorcycle Tyre
Airplane Tyre
Auto Spareparts
Heavy truck Spareparts and Accessories
Railway Spareparts and Accessories
Other Car Accessories
EV Spareparts and Accessories
Motorcycle Spareparts and Accessories
Trailer Spareparts and Accessories
Cooling System
Container Spareparts and Accessories
Bus Spareparts and Accessories
Aviation Spareparts and Accessories
Automotive Transmission System
Automotive Suspension System
Automotive Steering System
Automotive Modification Spareparts
Automotive panel System
Train Spareparts and Accessories
Truck Spareparts
General Spareparts
Wheels and Accessories
Automotive Lighting System
Air Conditioning System
ATV & UTV Spareparts & Accessories
Automotive Braking System
Automotive Driving System
Automotive Electrical System
Automotive Engine
Material
Natural Rubber
Synthetic Rubber
Carbon Black
Steel Wire
Tyre Fabrics
Chemical Additives
steel wheel
steel plate
oil filter
Battery
brake pad
Jack
Galvanized tile
service
Warehouse Services
Integrated logistics
Expo Services
Trade Assurance
Wiki
Q&A
Industry info
Company news
Industrial e-commerce platform
Industrial information service platform
Digital technology service platform
Group dynamics
RFQ
Contact Us
Feedback
App
Download Cnauto App
Scan the QR code to download
TOP
FredaJames
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
Industry info
Wiki
Q&A
tags:
Edits:
0
Number of entries:
0
tags:
Edits:
0
Number of entries:
0
Q
can a cold air intake damage your engine
MerryFlower
FredaJames
Release Time:
July 1, 2024, 2:36 PM
A cold air intake can improve engine performance by allowing cooler air into the combustion chamber, which is denser than warm air and can increase power. However, without proper installation or if a low-quality unit is used, it might allow harmful debris into the engine, potentially causing damage over time. An improperly installed cold air intake can also disrupt the air-to-fuel ratio, leading to inefficient combustion and engine performance issues. It’s crucial to choose a reputable brand and ensure it’s correctly installed, preferably by a professional. Regular maintenance and air filter checks are essential to prevent any long-term engine damage. In summary, while a cold air intake system can offer performance benefits, it must be carefully selected and maintained to avoid potential engine harm.
0
Q
how to calculate engine efficiency
CherylMaugham
FredaJames
Release Time:
June 30, 2024, 1:42 PM
Engine efficiency can be calculated using the formula for thermal efficiency, which is the ratio of work done by the heat engine to the heat energy supplied to it. Here’s the step-by-step process: 1. Find the amount of energy supplied to the engine. This is typically measured in joules and can be found on the fuel you are using or is often given in problems. 2. Calculate or find the amount of energy or work the engine outputs. This is also typically measured in joules. 3. Divide the work output by the energy input and multiply the answer by 100 to get the efficiency percentage. The formula to calculate engine efficiency is: Efficiency = (Work Output/Energy Input) * 100% For example: If an engine produces 20,000 joules of work from 50,000 joules of energy input, the engine’s efficiency would be (20,000/50,000) x 100 = 40%. Note: Internal combustion engine efficiencies typically fall into a range around 25% to 50%. Electric engine efficiencies are often above 90%.
0
Q
how many hours can a boat engine last
OmarTrollpoe
FredaJames
Release Time:
June 28, 2024, 7:12 AM
The lifespan of a boat engine, measured in operational hours, can vastly vary depending on several factors, including the type of engine (outboard, inboard, or sterndrive), maintenance practices, usage intensity, and the engine’s manufacturing quality. On average, a well-maintained boat engine can last between 1,500 to 3,000 hours. However, inboard engines tend to have a longer lifespan, possibly exceeding 3,000 hours with meticulous care. Key to maximizing engine life are regular maintenance, proper winterization, and adhering to the manufacturer’s operational guidelines. Ensuring the engine operates within its ideal RPM range and not consistently pushing it to its limits can also significantly enhance longevity. Recommendations for boat owners include investing in routine inspections and timely repairs, using quality fuels and oils, and educating themselves on their specific engine’s needs to ensure optimal performance and extend its usable life.
0
Q
dissolution of naoh in water
BellaJohnny
FredaJames
Release Time:
June 25, 2024, 3:29 AM
The dissolution of NaOH (sodium hydroxide) in water is a highly exothermic process. When NaOH solid (either in pellets, flakes, or powder form) is added to water, it dissociates into sodium (Na⁺) and hydroxide (OH⁻) ions. This process involves the breaking of ionic bonds in NaOH and the formation of hydrogen bonds between the hydroxide ions and water molecules. The significant release of heat during this reaction can cause the solution and its container to become very hot, which is why care must be taken to handle the process safely, often by adding NaOH to water slowly and in small amounts, to avoid splashes and prevent the solution from becoming too hot too quickly. The resultant solution, often called lye in its more concentrated forms, is a strong base and is highly caustic, having various applications in cleaning products, soap making, and chemical synthesis.
0
Q
hdpe compatibility
MarlonLizzie
FredaJames
Release Time:
June 19, 2024, 2:50 PM
High-density polyethylene (HDPE) is a versatile polymer used in various applications due to its physical properties such as high impact resistance, moisture resistance, and chemical inertness. When it comes to chemical compatibility, HDPE is notably resistant to a wide range of substances, including many acids, bases, salts, and organic solvents. However, it has limitations, particularly with strong oxidizing acids, halogenated hydrocarbons, and certain types of hydrocarbons, where it can swell or degrade upon exposure. Choosing materials compatible with HDPE involves understanding the specific chemical environment it will be exposed to. For industrial applications, consulting a chemical resistance chart specific to HDPE is advisable to ensure long-term material integrity and performance. Additionally, considering physical stress factors and UV exposure is crucial, as they can affect HDPE’s durability and chemical resistance.
0
Q
is acrylic and polypropylene the same thing
VeromcaAnderson
FredaJames
Release Time:
May 14, 2024, 2:44 PM
Acrylic and polypropylene are distinctly different materials, each with unique properties and applications. Acrylic is a synthetic polymer known scientifically as polymethyl methacrylate (PMMA). It’s prized for its clarity, resistance to UV light, and impact strength, making it a popular choice for products like aquariums, lenses, and protective barriers. On the other hand, polypropylene is a type of thermoplastic polymer used extensively in packaging, textiles (e.g., ropes, thermal underwear, carpets), and reusable containers. It’s characterized by its fatigue resistance, flexibility, and ability to resist chemical and water absorption. While both materials are plastics, their different physical and chemical properties make them suitable for various specific uses. Acrylic is often chosen for applications requiring transparency and a glass-like appearance, whereas polypropylene is selected for items needing to be lightweight, durable, and resistance to a wide range of chemi...
0
Q
hdpe pipe roughness
SallyI
FredaJames
Release Time:
May 13, 2024, 2:10 PM
HDPE (High-Density Polyethylene) pipe, widely used for water and gas transmission, is known for its smooth internal surface. The roughness of HDPE pipes is significantly lower compared to traditional materials like concrete or steel, leading to less friction and higher flow rates. Roughness values for HDPE pipes are typically measured using the Hazen-Williams roughness coefficient, where HDPE has a value of around 150-155, indicating very smooth surfaces. This low roughness characteristic reduces energy costs for pumping and contributes to HDPE pipes’ efficiency and cost-effectiveness over their lifespan. However, it’s worth noting that while HDPE has inherent smoothness, factors such as installation quality, age, and the presence of sediments can affect the actual roughness over time.
0
Q
average retail profit margin hdpe pipe
CharlesLowell
FredaJames
Release Time:
May 13, 2024, 4:27 AM
The average retail profit margin on HDPE (High-Density Polyethylene) pipe can vary significantly depending on factors such as the size and thickness of the pipes, market demand, and geographic location. Generally, the profit margin for HDPE piping can range from 20% to 40%. This is influenced by the costs of raw materials, production, and transportation, which can fluctuate based on global oil prices since HDPE is a petroleum product. Additionally, the competitive landscape in the region and the purchasing volume can impact the final markup. Retailers may operate on lower margins for large projects to secure bulk deals. It’s important for purchasers to negotiate and compare prices to ensure they are getting a fair deal. Keep in mind that sustainability concerns and the increasing demand for durable and flexible piping solutions may affect HDPE pipe prices and profit margins in the future.
0
Q
how to polish polypropylene plastic
LouiseSamson
FredaJames
Release Time:
May 12, 2024, 6:59 PM
Polishing polypropylene plastic can enhance its appearance, offering a smoother and sometimes glossier finish. Unlike more rigid plastics, polypropylene requires gentle handling due to its lower melting point. Start by cleaning the surface with soapy water to remove any debris or oils. Next, gently sand the polypropylene with fine-grit sandpaper, like 600-800 grit, to even out any imperfections; ensure to do this step wet to minimize heat generation. After sanding, rinse and dry the surface thoroughly. For the polishing step, use a non-abrasive polish or plastic polish specifically designed for plastics. Apply the polish with a soft cloth in circular motions, and buff out until you achieve the desired shine. Avoid using excessive pressure during polishing to prevent damage. Finish by wiping off any residual polish with a clean, soft cloth. This method can significantly improve the aesthetic appeal of polypropylene items, though it’s worth noting not all types of polypropylene mig...
0
Q
negatives of polypropylene
HowarBessemer
FredaJames
Release Time:
May 9, 2024, 2:29 PM
Polypropylene, a versatile polymer used widely in packaging, textiles, and automotive parts, comes with its set of negatives. First, while it’s praised for durability and resistance to chemicals, it can degrade under prolonged exposure to UV light, leading to brittleness. This limits its outdoor application without adding UV stabilizers, which can increase costs. Second, its recycling rate is far from perfect. Although it is recyclable, the recycling infrastructure for polypropylene is not as developed as for materials like PET and HDPE, leading to lower recycling rates and more waste. Third, it’s derived from petroleum, making it a non-renewable resource. The production of polypropylene contributes to the depletion of fossil resources and adds to carbon emissions, thus having an environmental impact. Despite its advantages, these negatives of polypropylene highlight the need for sustainable alternatives and improvements in its lifecycle management.
0
You May Like
BMW 5-SERIES F10 FRONT BUMPER
Product Name: Florescence Korea Agricultural Inner Tube Tractor Tyre Inner Tubes 14.9-24 16.9-30 710/70-42
Block head cover
XCMG LW500HV WHEEL LOADER
USD HONGQI CAR
FAW TRUCKS 8x4 New J5P
Rongfang RAV4 exterior door handle
Q&A
•
where are kumho tyres made
•
how to clean aluminum engine parts
•
how to reset engine light honda civic
•
what new vehicles are in gta 5
•
what engine is in the new corvette
Popular Information
•
China to challenge Biden’s electric vehicle plans at the WTO
•
Chinese battery giant CATL shrugs off EV sales slowdown to press on with expansion
•
Automakers score victory as Energy Department weakens EV mileage rule
•
Stellantis to cut 400 engineering, technology jobs
•
Volkswagen, Mobileye expand autonomous driving collaboration
Links
made-in-china
echemi.com
eurocarparts.com
made-in-china
echemi.com
eurocarparts.com
made-in-china
echemi.com
eurocarparts.com
made-in-china
echemi.com
eurocarparts.com
About Cookies On This Site
We use cookies to give you the best possible experience on our website. For more details including how to change your cookie settings, please read our
Cookies Policy
I understand
Cookie Settings