Breaking: Seamless Pipe

When it comes to seamless pipes or tubes, they are considered one of the most commonly employed products in numerous different industries. In general, seamless tubes are utilized for transporting liquid and fluid from point A to point B. Learning about seamless tubes and pipes' functions can be vital as it allows us to comprehend how various industries put these to use.

Before being introduced to the many uses of a seamless pipe, it's first and foremost important to understand what exactly the material looks like. Based on the product's name, a seamless pipe is a continuous hollow pipe made of carbon or stainless steel.

A seamless pipe or tube is hollow in nature. The tube is also continuous and is created out of either stainless steel or carbon. The primary purpose of these seamless pipes is to transport liquids and fluids, as discussed earlier. These seamless tubes are created without gaps or serrations to ensure that the transfer of liquids occurs. The lack of gaps ensures the fluid flows freely and is not potentially contaminated by external factors. Another purpose of a seamless pipe is to remove any chance of accidental overflow or random silage. This is why industries such as the shipbuilding, boiler and petrochemical industries rely heavily on seamless tubes.

Seamless pipes are employed in chemical and mechanical processes but also have commercial uses. It is mostly because of its ability to withstand pressure and maintain its shape. Here are some of the reasons why seamless pipes are preferred throughout.

Seamless pipes are extremely strong when it comes to material. If we compare it to welded pipes, they can withstand more harsh circumstances. Because seamless pipes lack welded gaps, seamless pipes are not susceptible to pipe failures and leaks.

The uniform, circular cross-section available in all seamless pipes makes it more advantageous if we compare it to welded pipes. The uniform shape also comes in handy for installing fittings or further piping needs.

In seamless pipes, welding quality plays does not play an important role and is not required to calculate the pressure rating. Seamless pipes eliminate the weakest point: the gaps created due to the welding process. This allows these seamless pipes to withstand high-pressure levels and create a safer manufacturing unit.

Tianjin Tewoo Group is one of Chinese best seamless pipe manufacturer and exporter of pipes. We have experience in seamless tubes, heat exchanging tubes, fintubes, and U-bend heating tubes. Our expert engineers follow the cold-drawn process to create seamless pipes and tubes and provide them with a well-defined finishing touch.

Our installers guarantee your seamless carbon steel pipes are shipped safely without any damage done to the product. Our engineers make thorough quality checks to maintain the quality of the tubes. For more information on our seamless tubes and services, contact us today acero.sigridsun@gmail.com.

Bloggers, are you sure the difference between cold rolled steel and hot rolled steel?

It's important to note that the main difference between hot rolled and cold rolled steel is one of process. Hot rolling refers to processing done with heat. Cold rolling refers to processes done at or near room temperature. Although these techniques affect overall performance and application, they should not be confused with formal specifications and grades of steel, which relate to metallurgical composition and performance ratings. Steels of different grades and specifications can be either hot rolled or cold rolled-including both basic carbon steels and other alloy steels.

It may seem obvious, but some types of steel are better suited for certain applications. Knowing which to use can help avoid over-spending on raw materials. It can also save time and money on additional processing. Understanding the differences between hot and cold steel is integral to choosing one over the other.

Hot rolled steel is steel that has been roll-pressed at very high temperatures, which is above the re-crystallization temperature for most steels. This makes the steel easier to form, and resulting in products that are easier to work with.

To process hot rolled steel, manufacturers first start with a large, rectangular length of metal, called a billet. The billet is heated and then sent for pre-processing, where it's flattened into a large roll. From there, it is kept at a high temperature and run through a serious of rollers to achieve its finished dimensions. The white-hot strands of steel are pushed through the rollers at high speeds. For sheet metal, rolled steel is spun into coils and left to cool. For other forms, such as bars or plates, materials are sectioned and packaged. Steel shrinks slightly as it cools. Since hot rolled steel is cooled after processing, there is less control over its final shape, making it less suitable for precision applications. Hot rolled steel is often used in applications where minutely specific dimensions aren't crucial. Railroad tracks and construction projects often use hot rolled steel.

Hot rolled steel can often be identified by the following characteristics:

• A scaled surface-a remnant of cooling from extreme temperatures
• Slightly rounded edges and corners for bar and plate products.
• Slight distortions, where cooling may result in slightly trapezoidal forms, as opposed to perfectly squared angles.

Hot rolled steel typically requires much less processing than cold rolled steel, which makes it a lot cheaper. Because hot rolled steel is allowed to cool at room temperature, it's essentially normalized-meaning it's free from internal stresses that can arise from quenching or work-hardening processes.

Hot rolled steel is ideal where dimensional tolerances are not as important as overall material strength, and where surface finish isn't a key concern. Where surface finish is a concern, scaling can be removed by grinding, sand blasting, or acid-bath pickling. Once scaling has been removed, various brush or mirror finishes can also be applied. Descaled steel also offers a better surface for painting and other surface coatings.

Cold worked steels are typically harder and stronger than standard hot rolled steels. Cold rolled steel is essentially hot rolled steel that has been through further processing. Once hot rolled steel has cooled, it is then re-rolled at room temperature to achieve more exact dimensions and better surface qualities.

Cold rolled steel is often used to describe a range of finishing processes, though technically cold rolled applies only to sheets that undergo compression between rollers. Steel forms that are pulled, such as bars or tubes, are drawn not rolled. Other cold finishing processes include turning, grinding, and polishing-each of which is used to modify existing hot rolled stock into more refined products.

Cold rolled steel can often be identified by the following characteristics:

• Better, more finished surfaces with closer tolerances.
• Smooth surfaces that are often oily to the touch.
• Bars are true and square, and often have well-defined edges and corners.
• Tubes have better concentric uniformity and straightness.

With better surface characteristics than hot rolled steel, it's no surprise that cold rolled steel is often used for more technically precise applications, or where aesthetics are important. But due to the additional processing for cold finished products, they come at a higher price.

In terms of physical characteristics, cold rolled steels are typically harder and stronger than standard hot rolled steels. As the metal is shaped at the lower temperatures, the steel's hardness, resistance against tension breaking, and resistance against deformation are all increased due to work hardening.

These additional treatments, however, can also create internal stress within the material. This can cause unpredictable warping if the steel is not stress relieved prior to cutting, grinding, or welding.

Depending on what you're looking to build, different materials each have their own benefits and drawbacks. For run-of-the-mill projects or one-off productions, steel materials can provide the building blocks for any structures configuration imaginable.

For more information on steel, or to request a quote for a custom project, please contact us: acero.sigridsun@gmail.com.

We Analyze Gas Pipeline

 A gas pipeline is a network of pipes that are used to transport gas across a vast distribution network. In the context of energy and civil engineering, pipelines are used to distribute various fluids, such as oil, oil products, or natural gas. These oil and gas pipelines form extensive distribution networks.

In the energy sector, there are two major types of pipelines: liquids pipelines and natural gas pipelines. Liquid pipelines are used to transport either crude oil or natural gas in liquid form. These substances then go to refineries where they're subject to distillation and production processes. Some liquid pipelines may also be used to transport distilled petroleum products to distribution centers.

Largely, however, natural gas pipelines are the ones used for distribution. These pipelines transport natural gas to processing plants and are used for distribution purposes-natural gas is often delivered directly to homes through such pipelines.

Within these two categories, there are also four subcategories that describe pipelines of different sizes and purposes: gathering lines, feeder lines, transmission pipelines, and distribution pipelines. The combination of these four types of lines make up the complex network of natural gas pipelines that we see in countries throughout the world.

Pipelines made for gathering and transmission are usually made of steel, but a select few are made from plastic, iron, composite, or other materials. Most gas pipelines are made of steel, but the type of pipe material used in a pipeline normally depends on the expected service requirements and predicted operational parameters for the pipelines.

The steel pipe used in the construction of these pipelines can range in size, reaching from several inches in diameter to several feet. In terms of length, they can be anywhere from hundreds of feet to hundreds of miles long.

Typically, the steel pipe necessary for constructing gas pipelines is manufactured according to strict design specification. It's often produced in 40-foor sections that are joined together in the field with welding tools when the pipeline is being constructed.

Another important distinction when it comes to pipeline materials is uncoated versus coated pipelines. Some gas and hazardous liquid pipelines are uncoated and are known as bare steel pipelines. Most of this type of pipeline has been taken out of service and is no longer used in constructing new pipelines today, but there are a few that continue to operate.

Gas flow through a pipeline due to the results of a serious of compressors creating pressure differentials. In other words, natural gas flows from an area of high pressure to an area of lower pressure, following the natural laws of physics. The compressors are powered by electric or natural gas-fired engines that compress the incoming gas and then push it out at an increased rate of pressure.

There are a few gathering systems out there that actually don't need compressors. Why? In some cases, the natural gas coming out of the wells has enough pressure to move through the gathering lines on its own. As you might expect, the compressors needed for large transmission lines are significantly larger than those compressors used to move gas through smaller distribution lines-such as the ones that go directly to houses and residential locales.

In transmission pipelines, natural gas is typically compressed to pressures between 500 and 1400 pounds per square inch. The compressor stations on these pipelines are normally built every 50 to 100 miles along the length of the pipeline. This is just about the required distance to ensure the pressure can keep the gas moving.

Some transmission pipelines are built to be what's called bidirectional. This means that gas can come from both ends of the pipelines, depending on where the gas is gathered from. In other words, the compressors can be used to create varying pressure differentials, meaning gas can flow in either direction in the pipeline. 

Oil pipelines transfer liquid petroleum in its crude format, while gas pipelines transfer natural gas and biofuels, Although they might seem similar, oil and gas pipelines have many important differences, ranging from capacity, speed, temperature, impact and power source.

These different types of pipelines operate at very different speeds. Oil pipelines generally move faster than their gas counterparts. Their storage capabilities are also different. While the pipe's area itself is fixed, natural gas is fare more compressible than crude petroleum, so gas pipelines can carry more fuel at once.

Gas pipelines can also be kept at lower temperatures than oil pipelines. Oil pipelines require additional heat to ensure they don't get clogged. Going along with this point, crude oil pipelines have a far more drastic impact on the environment. If sudden leakage occurs, crude petroleum pipelines can have dramatic consequences and the leak can catch fire quite easily.

Finally, the two pipelines have different sources of power. Oil pipelines are typically powered by a centrifugal pump whereas gas pipelines are powered by a compressor and the pressure differentials that it creates. 

Why Steel Pipe Construction?

 People have been using steel pipes for construction for several decades and for many good reasons. Structural steel is a versatile material that offers several benefits for construction projects. Whether you're building a skyscraper, bridge, or any other structure, using steel pipes for construction can help you quickly achieve your goals.

Keep reading about the top 5 advantages of using structural steel in construction and why steel pipes are the go-to option for many construction projects.

Flexibility at its finest: designing with steel pipes

One of the most significant advantages of using steel pipes for construction is their flexibility. Structural steel is highly adaptable and can be molded into any shape or size to meet the specific requirements of a construction project. That means you can design and build almost any structure with steel pipes, regardless of complexity.

The robustness of structural steel

Another significant advantage of structural steel pipes is their strength and robustness. Structural steel has an excellent strength-to-weight ration, which means that it can withstand heavy loads without being too heavy. That makes it an ideal material for building structures that need to support heavy equipment, machinery, or people.

Built to last: how steel pipes ensure longevity

Structural steel is also highly durable and can last for several decades without showing any wear and tear. Steel pipes for construction are resistant to corrosion, rust and other environmental factors that can damage other construction materials. That makes steel pipes a cost-effective option in the long run, as they require minimal maintenance and repair.

Easy assembly, efficient construction: using steel pipes

Steel pipes for construction are also easy to assemble, saving a lot of time and money during construction. Steel pipes can be prefabricated offsite and assembled onsite, reducing the need for skilled labor and minimizing the risk of construction errors. That can help you complete your project quickly and efficiently.

Cost-effective construction: the benefits of steel pipes

Using the best steel pipes for construction can be cost-effective, especially compared to other construction materials. Steel pipes are highly durable and require minimal maintenance, reducing costly repairs and replacements. Additionally, steel pipes can be recycled, making them an eco-friendly option that can save you money in the long run. 

If you're looking for high-quality steel pipes for your construction project, look no further than Tianjin Tewoo. With decades of experience in the industry, we offer a wide range of steel pipes for construction that are strong, durable and built to last, Contact us(acero.sigridsun@gmail.com) today to learn more about our products and services. 

What You Should Know About Black Steel Pipes

You must read this article to quickly purchase quality steel pipes for your upcoming projects. 

Typically, pipe manufacturers don't coat black steel pipes with zinc or paint. The surface of this steel becomes black due to the formation of iron oxide while manufacturing, therefore, the experts named it black steel pipes. The specialists mainly use these pipes in areas that don't require galvanized steel.

Here, we have answered some of the most frequently asked questions about black steel pipes to enlighten our readers.

Where do the experts use black steel pipes?

Generally, we use black steel pipes in various industries because of less maintenance and strength-these pipes transport water and gas to rural and urban areas.

Moreover, we also use these pipes in oil industries to carry large quantities of oil through remote areas. But remember, it is not suitable to transport portable water as it is prone to corrosion. Water and mineral deposits can often clog the pipes.

What are the features of black steel pipes?

Construction workers install black steel pipes beneath the soil, which is not valid for most other sorts of pipes. A hardware store can cut the line to thread it. In general, black pipes in larger diameters are welded instead of threaded.

What are the specifications of black steel pipes?

The size of the black steel pipes remains between 1/2" and 8". According to the thickness, the steel pipes can be schedule40, schedule10 and std. The average length of this type of pipe starts from 5 to 12m and the material grade is Api 5 l gr.

Is there any difference between black steel pipes and other steel pipes?

The experts produce steel pipes in two methods-either they can be welded or as seamless tubes. They cast the raw steel into a more viable initial form in both ways. Afterward, they make it into a seamless pipe by stretching the edges together and sealing them with welding.

Contact us.

By now, you know what black steel pipes are and how you can use it more successfully. But remember, both the quality and quantity matter in this case. Otherwise, your project may fail due to a lack of functionality. To purchase quality black steel pipes at a reasonable price, contact one of the most popular steel pipe distributors-Tianjin Tewoo. (acero.sigridsun@gmail.com) 

The Ultimate Guide To Learn More About Several Advantages of Steel Conduit

 We, Tianjin Tewoo, is professional in manufacturing steel conduit including BS4568&UL797 which have succeeded in exporting many countries especially to South American areas. Thus we are qualified to introduce specifically the advantages of steel conduit.

A steel conduit is a type of metal tubing or casing that provides a protective covering for various electrical wiring. Protecting electrical wiring has become an increasingly important priority for multiple industries for a long time, as unprotected electrical wiring can lead to various safety hazards such as fires and grounded cables. This can cause a great deal of damage to facilities and equipment, and even cause harm to personnel.

Through the use of steel conduits, you would be able to prevent these hazards from happening and ensure that you would be able to establish safe working locations. These steel conduits come in different forms, each providing various qualities that would keep your wiring secure.

Steel conduits are designed to protect wiring from getting exposed to extreme conditions, providing a secure channel for electricity to run properly. Along with these qualities, you also have a host of other great advantages that make it an essential material to have within an industrial location. Here are some of the benefits of using steel conduits:

High impact and temperature resistance

Steel is known for being one of the strongest materials, being resistant to different kinds of conditions like high impact and strong temperatures. Resistance to these elements ensures that the steel conduit would not get easily damaged, keeping the wires intact at all times. High temperatures are also present in the construction and manufacturing industries, causing certain materials to break or melt after a certain period of time. By having the right set of steel conduit tubing, you would be able to provide the strongest materials for your wiring needs.

Recyclable and sustainable

Along with being one of the strongest materials available, steel is also very sustainable and recyclable. Steel is designed to last for a long period of time before needing to be replaced, while also being environmentally friendly, having a lower carbon footprint compared to other industrial materials. Recycling steel is also a very efficient process as well, as manufacturers would be able to reuse a high percentage of existing steel parts to form new ones, saving a great amount of resources as a result.

Non-combustible

Industrial areas are places where there is a high amount of fire hazards present. This is even more evident when wiring is left exposed to the elements, increasing the likelihood of getting damaged and causing sparks that lead to fires. This can be effectively prevented by making use of steel conduits, which are strong and non-combustible, ensuring that any spark or flame would not affect its surface.

Adaptable and flexible

Steel is not only highly durable, but they are also one of the most versatile materials used in the industry. Steel can be molded and shaped into different parts and sections, helping create different types of facilities, machinery, and equipment. This is also applicable for steel conduits, as they can be bent into different angles to accommodate different kinds of wiring applications across multiple locations. If you are looking for a way to install wiring in different industrial locations, steel conduits are some of the best materials to use.

Electrical wiring is one of the most vulnerable and sensitive locations in any industrial location, which is why it must be protected from different kinds of hazards. By using steel conduit materials, you would be able to provide the best wiring protection against different kinds of extreme conditions and hazards.

A Comprehensive Tutorial To Learn About Different Methods Of Galvanizing

Several methods of galvanizing steel have been invented and developed. For now, there are 5 common methods used in the steel industry.

Hot-dipped galvanization

Hot dipped galvanization is a process where the metal is dipped into a molten pool of zinc.

To galvanize the steel using this method, you need to follow these steps:

• Clean the surface to assure a quality bond can be made between the steel and the zinc coating. The cleaning process can be done either mechanically, chemically, or both.
• Flux the steel to wash away and residual oxides remained after the cleaning process.
• Dip the steel into a molten pool of heated zinc.
• Cool down process.

After being removed from the pool and cooled down, there will be a reaction to the oxygen in the air that causes the zinc to become a part of the steel. A protective zinc coating is made economically and quickly no matter the shapes are. That's why it is the most commonly used method in the industry.

The only disadvantage of this method is that the final coating might be inconsistent in comparison to other galvanizing processes.

Galvannealing

As the name suggests, this method is the combination of the hot dipped galvanizing and annealing processes. The result of galvannealing is a special zinc coating on the steel.

Galvannealing involves the process of the steel being hot-dipped into a zin bath, passed over by the air knives to remove the excess zinc then taken into an instantaneous annealing in a few seconds. The result of the whole process is an alloy with a matte gray finish which can be cut to various dimensions upon request.

The core advantage of galvannealing method that makes it preferable to other coating processes is the matte finish, which is excellent for paint adhesion. Also, the process also results in a tougher coating in comparison to other galvanization methods which is effectively resistant to scratches and other forms of superficial damage.

Pre-galvanizing

This method is also known as the mill galvanizing. It is very close to the hot dipped galvanization but performed at the steel mill on the materials that already have a specific shape.

Pre-galvanizing process consists of some steps of hot dipped galvanization such as cleaning the surface, dipping into a hot zinc liquid bath combining with the recoiling process.

This method allows large coils of steel to be galvanized and coated equally and quickly, compared to the results come from the hot-dipped galvanizing process.

However, once the fabrication process of the pre-galvanized steel begins, the exposed and uncoated areas will appear. For example, when a long sheet/a coil is cut into smaller size, the edges where the steel is cut are left exposed.

Electro-galvanizing

Unlike the previously listed methods, electro-galvanizing does not require a molten vat of zinc. This process is basically an electrolyte solution that utilizes an electrical current to transfer zinc ions onto the steel.

To electro-galvanize the steel, we electrically reduce positively charged zinc ions to zinc metal. These ions then will be deposited on the positively charged material. During the process, grain refiners can be added to ensure a smooth coating on the steel.

Also known as a mill-galvanizing process, electro-galvanizing is typically done at the first stage of production. This method is extremely helpful when it comes to the requirement of galvanizing a roll or a sheet of metal with uniform coating at precise thickness. However, this thickness is smaller than what is achieved by the hot dipped galvanizing method. The corrosion protection hence might be reduced.

Galvanizing advanced high-strength steel

This is a new method of galvanizing steel and as the name suggests, it is like an upgraded version of the hot-dipped galvanizing method. Besides being cleaned and dipped into a hot zinc pot, the steel coil will also be put through a chemical treatment to passivate the rust. The steel then will be tempered and tension-leveled to produce a higher quality surface than other traditional methods.

The method produces galvanized steels with better surface quality, which is also light-weight and exceptionally strong. However, the process is not common yet so the price is fairly expensive for both producing and purchasing.

In general, all galvanizing methos consists of 4 fundamental steps:

• Surface preparation: This stage might be a list of steps that helps removing the oxides and other contaminating residues to obtain the cleanest possible surface.
• Fluxing: This stage aims to create a protective coating to prevent any oxidation before entering the galvanizing process.
• Galvanizing: The main stage of the process to coat a zinc layer over the surface of the steel.
• Finishing: After the galvanizing stage, this helps cool down the steel. Sometimes, more treatments such as chemicals will be added to enhance the protection of the zinc coating, and removing zinc drips or spikes are also included.

Of all the listed methods, hot-dipped galvanization is the most commonly used one that produces galvanized steel with thick coating. Meanwhile, pre-galvanizing is the method that is widely used at mills for the first stage of production.

Tianjin Tewoo-the reputed manufacturer of galvanized steel

How to choose high quality galvanized steel?

Based on specific requirements, there'll be suitable steel types with different treatment of galvanizing. However, high quality galvanized steel still possess quite the same criteria such as following:

• The product comes from factories with high production capacity and quality the international standards that are widely applied for galvanized steel such ASTM, JIS, or AS/NZ.
• The finished product should be fully labeled so you will be able to check the origin of the product. This ensures that the steel you buy is from a prestigious supplier/manufacturer.
• The surface should be smooth and bright, and there of course should not be any sign of corrosion.

Tianjin Tewoo-the reputed manufacturer of galvanized steel

Experiencing more than 30 years of development in international market and currently possess a huge factory with a production capacity of over 600,000 tons annually, Tianjin Tewoo produces and supplies galvanized steel products that tick all these boxes.

Experiencing over 20 years of development in international markets and currently possess 03 factories with a production capacity of over 600,000 tons annually, Chinh Dai Steel produces and supplies galvanized steel products that tick all these boxes.

The galvanized steel products of Tianjin Tewoo(such as galvanized rolled steel coils, pipes, purlins and other fabricated products) are made from high quality imported materials with the zinc coating from Z120-Z275. Our products also meet international standards such as ASTM(A500, A53&A513), AS/NZ 1163, JIS G3444 and EN 10219. You can easily check the origins of every product on its own labels with QR codes.

Being widely utilized since the 18th century despite many industrial revolutions, galvanized steel is like the base material of the world. In the near future, there might be more advanced methods that simplifies the galvanizing process yet maintains the quality of the steel. To understand the general process of galvanizing and know how to choose the high quality steels is still the key to achieving success with your project.

How To Know The Difference Between Rigid Conduit And EMT Without Difficulty

 Knowing the difference between rigid conduit and EMT, or electrical metallic tubing, will be very important in order to make sure you're getting exactly the right type of conduit for your specific application. We(Tianjin Tewoo) is staffed with experts who will be happy to answer any questions you may have regarding the types of conduit we have on hand. No matter what type of size you may need, we'll have it-and we'll also be able to get it to you very quickly.

Why conduit is so important?

Conduit is a vital component of any sort of structure, whether it's commercial, industrial or anything else. Conduit provides the protection electrical wires need so they don't suffer damage due to an accident of environmental conditions, such as moisture or extreme cold or heat. It makes it easy to pull wires through finished walls, and also allows for convenient changes should your wiring needs change.

There are two main types of conduit-rigid metal conduit, or RMC, and EMT. Here's a brief look at the main differences between them.

RMC

RMC is threaded and has thick walls. You connect different sections of RMC together by using screws to attach the connectors to the tubes. RMC provides a great deal of protection for wiring, and can also be used as a grounding connector-providing the runs are short. One of the main advantages of RMC is that its thick walls protect sensitive equipment from electromagnetic interference.

You'll find RMC in a lot of different applications. For example, it can be used in environments where chemical fumes are found. RMC is also commonly used underwater, and in oil refineries.

Since RMC connections are threaded, it will take more work to install. As a result, RMC costs more than EMT. In addition, RMC is more expensive because it's thicker and heavier.

EMT

The biggest difference between RMC and EMT is that EMT is a lot lighter. It has thinner walls and is also unthreaded. As a result, it's a very popular option for use in commercial buildings. Connecting sections of EMT is easier. The process involves using clamps that slide onto each end of the tubing, which are then secured with setscrews.

EMT is much less expensive than RMC, yet still provides excellent protection for wiring-as long as its not used in environments that can pose a risk for damage. For example, EMT should not be used in areas that have a lot of vehicle traffic.

Get in touch with us for more information on the difference between rigid conduit and EMT. Contact us by email: acero.sigridsun@gmail.com

3 Reasons You Choose Our Steel ( Chinese Tianjin Tewoo)

Although there are many adverse reports on the websites about Chinese steel, its actual reputation remains strong all around the whole world. Companies know they can rely on it, and in the wake of the pandemic and the associated supply chain challenges-not to mention the reshoring trend that started years ago and has accelerated during the pandemic-the Chinese steel industry is poised to make a comeback.

Three Reasons You Choose Our Chinese Company's Steel

Shorter supply Chain

When sourcing supplies and raw materials, we reduce transportation costs and the risk of delay. We also have the opportunity to keep a closer eye on the process to ensure quality control.

Safety and Quality

Our steel products are simply better. The quality standards in our company surpass others, and steel must undergo a variety of safety tests before it can be used for construction or manufacturing project. When you buy our steel, you can trust the integrity of the product.

Environmental impact

We are driven by consumer demand to look for other ways to lower emissions and enhance sustainability and also regularly uses scrap to manufacture steel, which not only reduces waste-it also produces less CO2 than iron ore production.

Our company has a long, rich history and the integrity and reliability that was established years ago still remains. As the government-based corporation, we have the opportunity to bolster the Chinese economy, support local communities, shorten supply chains, improve quality control, decrease environmental impact, and create higher-quality products for the end user. It's a win-win situation that benefits businesses and consumers alike.

Our Tianjin Tewoo is a proud government-based corporation based in Tianjin China. We're grown from humble beginnings in 1980s into the country's leading provider of highly engineered steel products with special shapes for a variety of industries, including railroad, automotive, infrastructure, agriculture, construction and more. Our commitment to innovation and community drives us to serve our employees and our customers with respect, integrity, and the high-quality products you expect and deserve.

Contact us(acero.sigridsun@gmail.com) to learn more about our facilities and capabilities, or to inquire about the benefits of using our Chinese steel.

We Analyze Mill Test Certificate

 The material Test Certificate, or also known as Mill Test Certificate, plays an important role in the quality control of materials in multiple industries, including manufacturing, construction, and oil and gas. But often, many buyers find it difficult to understand the certificates.

In this article, we(Tianjin Tewoo) will introduce you to material test certificates, explain their significance and outline issues you may encounter with your manufacturer or supplier. In a word, we(Tianjin Tewoo) are the professional manufacturer & supplier with official MTC.

What is a Material Test Report/Mill Test Report?

The Material Test Report, also known as a Mill Test Certificate (MTC), is a document that verifies a material's chemical and physical properties. Typically, the report should be in paper form and contain the factory quality control approval, along with a special material test certificate stamp.

The testing standards and content in the report generally align with the factory's manufacturing standards or the client's specific requirements. Typically, the report contains detailed information on the material's composition, including the type, grade, and specifications, as well as the results of various tests the material was subjected to, such as tensile strength, yield strength and more.

Who can issue the Mill Test Certificate?

The material test report, or mill test report/certificate, is usually provided by the manufacturer before the products are shipped out of the factory.

However, a third party quality inspection company may sometimes issue the report depending on specific requirement. For example, the manufacturer may only be able to fulfil the requirements specified in an EN10203.3.1 certificate. If you request an EN10204.3.2 certificate, then you'll need a third party with adequate qualifications to issue the certified material test report.

What is the purpose of a MTC?

There are two main points why the material test certificate is important.

1. Verification of product quality

The certified material test report serves as evidence of the product's quality from the factory, verifying that it has undergone testing and confirm to the required standards. The report should be included with the product, and each product should have its own individual MTC.

2. Improved transparency and traceability

The mill test certificate also improves transparency and traceability throughout the manufacturing process. By examining the mill test certificate, it is possible to trace the production record of the factory and the testing results of the specific product.

What information is included in a MTC?

It's worth noting that the testing methods and content will vary depending on which materials are subject to the test.

For steel products, a MTC typically includes the following testing standards:

1. The manufacturer's name, address, and contact information.

2. Product specification and standards, heat number, and quantity.

3. The chemical composition analysis of the product.

4. The results of mechanical property testing.

5. The report may also include any other required tests, such as hardness, impact testing, and non-destructive testing.

The report should provide detailed testing results for each test, along with any necessary approvals from the factory's quality control department.

What are common problems with material test certificates?

Below are some of the frequent issues that may occur with the report.

• Smaller factories may not have the testing capability to perform the standard or the required test. They may issue certificates without actual testing.
• Certain trading company may intentionally conceal the original manufacturer of the materials to prevent clients from knowing their sources. They may use their own company name to replace the actual manufacturer's information.
• Suppliers may sometimes issue material test certificates that contain inaccurate or misleading information or do not conform with the materials of the order.
• Clients may not fully understand the meaning and significance of the report, making it difficult for them to recognize the accuracy and quality of the report.
• Some material test reports suppliers may not contain a stamp or signature from the quality control department and should therefore be considered invalid.

How to reduce risks associated with MTC?

You can undertake multiple actions to minimize the fraudulent risks associated with mill test certificates. Here are some of our tips:

1. Please pay close attention to the report and treat them as an integral part of the product.

2. Request the original valid certificate from the supplier and always ask them to show them during inspections.

3. Consider conducting on-site sampling of the products by a third-party inspector. 

4. Use third-party lab tests to verify the information contained in the certificate conform with the results

These 6 Pipes Could Help You To Build Construction

 We, Tianjin Tewoo, have succeeded in building a lot of complex constructions, so we have accumulated sufficient knowledge of different types of pipes used in building construction.

The different types of pipes used in building construction all have specific uses. For example, some pipes may be practical for plumbing, while some kinds are more ideal for structural applications. When it comes to using these pipes for many installations, it's important to consider the purpose, since this can be affected by the main piping material. Furthermore, the benefits of each type of pipe can bring about many advantages like cost-efficiency, versatility, environmental-friendliness and the like.

In this article, you'll specifically learn about the different building construction scenarios, where carbon steel, galvanized iron, cast iron, concrete, PVC, or concrete pipes are used. Continue reading to learn more.

Carbon Steel Pipes

One of the sturdiest and most durable piping materials is carbon steel. As the name suggests, this type of pipe is characterized as having a high level of carbon content. Carbon steel pipes can be further categorized depending on their fabrication-i.e. seamless, ERW, or welded pipe.

Carbon steel pipes make a great choice for plumbing works and other processes that require the transfer and conveyance of different types of fluids. It can be found in petrochemical plants, scaffolding, boiler systems. sewage, as well as a wide range of industrial uses.

These pipes are wholly capable of withstanding extreme temperature and pressure conditions. So if you're looking to find high-grade carbon steel pipes, make sure that you get them only from Tianjin Tewoo. Our carbon pipes come in a wide range of sizes and dimensions that can suit any construction project and industrial use.

Cast Iron Pipes

Cast iron pipes are arguably one of the oldest kinds of pipes in the market. Because of their toughness and long shelf life, it's no surprise that many centuries-old waterways and sewage drains in European countries still use these pipes up until today. In fact, a well-installed cast iron pipe system can last for as much as 100 years, provided that it's also properly maintained.

Apart from sewage and drainage systems, you'll also find cast iron pipes in high-rise or even other low-height and residential spaces. They're particularly useful for storm drains that can help prevent flooding and reduce water contamination for plumbing systems.

Despite their advantages, cast iron pipes are considered to be antiquated-you may not really find these pipe materials commonplace today, since these pipes have a tendency to accumulate corrosion and rusting over time.

Galvanized Steel Pipes

Steel pipes are also sometimes reinforced through a method called galvanization. Through this technique, the steel's surface is imbued with anti-rust and anti-corrosion properties. This makes the steel last longer and become more durable over time.

Although different galvanization techniques exist, hot-dip galvanization is the most common method used for steel pipes. The material first has to undergo surface preparation before it's submerged in a hot bath of molten zinc-around 500 degrees Celsius in temperature.

Once the galvnanized steel pipe has been fit for distributing and marketing, it can now be used across a variety of construction applications, like fencing, residential water supplies, railing, drainage systems, bollards, and even scaffolding. Although the cost of procurement for these pipes may be expensive, they're cost-effective in the long run, as you'll be able to minimize expenses on maintenance and replacement.

Galvanized Iron Pipes

similarly, iron pipes can also be galvanized to make them more corrosion-resistant. With this in mind, they can be found in both indoor and outdoor pipe installations as they can withstand many forms of corrosion like rusting and pitting.

Despite this, however, galvanized iron pipes are not really suited in areas where the water has a high content of dissolved salts like magnesium, iron, or calcium. This may be expensive in the long run, as the pipe needs to be constantly maintained in order to make sure that it does not have these problems.

Nevertheless, galvanized iron pipes can be spotted across automotive, aerospace, architectural, agricultural as well as telecommunications installations. They're affordable, yet incredibly sturdy.

Concrete Pipes

Another economical pipe is the concrete pipe that's been manufactured by crushing aggregates. Despite this, they may be more difficult to install compared to the other pipes on the list. This type of pipe tends to be heavy and cumbersome-transporting them from one site to another needs to be done carefully.

However, concrete pipes are extremely flexible and versatile despite their rigidity. Once again, they're suitable for use in drainage and sewage systems, and more commonly as culverts. These pipes are also reinforced with other materials like steel to make it stronger and protected against environmental damage.

PVC Pipes

Like many of the pipes on this list, PVC pipes are great for applications that require fluid transmission. Aside from this, they're also lightweight, flexible, and versatile in design. They can easily be modified in order to accommodate different pipe fittings that may be needed.

You'll often spot PVC pipes in electrical wiring systems, specifically as electrical conduit pipes. They provide a watertight and waterproof housing for electrical wires that may be exposed to external elements like high/low heat, pressure, and debris, but they also have their disadvantages. To give an example: Their structuring can be easily warped and distorted in high-temperature environments, which can be difficult to avoid at times.

If you are in need of piping materials, make sure that you determine your requirements before choosing among different pipes. It's also advisable to think about each pipe's advantages and disadvantages for practicality.