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Yes,We can ship the regular specifications to you with LCL service. Our minimum order quantity is 2-5 Tons. Yuantaiderun is a leading enterprise in the steel pipe industry, where quality and service coexist.Dive into the World of High-Quality Carbon Steel Pipes with Us Today! We Understand That Testing Products Before Committing to Bulk Orders Is Crucial, Which Is Why We Offer Easy Trial Ordering Options. With Our Consolidated Shipping Services, You Can Receive Standard Specification Goods Starting from Just 2-5 Tons. For Those Undertaking Massive Construction or Engineering Ventures, We’re Excited to Provide Free Samples (Shipping Fees Apply), Allowing You to Experience the Quality Firsthand. These Samples Will Be Cut to No More Than 20 Centimeters in Length, Giving You a Perfect Taste of What We Offer. Don’t Miss This Opportunity – Reach Out to Us Right Away for Your Free Samples and Begin Your Journey with Us! Steel Tube Samples Type Sample ContentOur contact information： 📩 sales@ytdrgg.com;☎ Whatsapp: +8613682051821

1.carbon-steel-pipe Anti-rusted oil painting,The rust problem of carbon steel pipes is mainly caused by long-term exposure to the air, so some measures can be taken for surface treatment, such as painting and galvanizing.Painting can form a protective film on the surface of carbon steel pipes, which plays a role in corrosion prevention and beauty; 2.steel pipe varnish paintingVarnishing the surface of carbon steel pipes is a common anti-corrosion protection measure, which can effectively extend the service life of the pipeline.Benefits of varnish coatingExtended life: Significantly improves the corrosion resistance of carbon steel pipes and reduces maintenance costs.Increased value: Good appearance helps to enhance the market competitiveness of products.Widely adaptable: Suitable for a variety of application scenarios, from industrial facilities to civil buildings.3.Carbon steel pipe surface galvanizingGalvanizing ProcessCommon galvanizing processes include hot-dip galvanizing (HDG), electro-galvanizing (EG) and mechanical galvanizing. Among them, hot-dip galvanizing is the most commonly used method because it provides a thicker and more uniform zinc layer with excellent durability and corrosion resistance.4.3LPE /3PP coated welded carbon steel pipeThree-layer polyethylene (3LPE, Three-Layer Polyethylene) coated welded carbon steel pipe is a high-performance anti-corrosion pipeline widely used in long-distance transmission pipelines in the oil and gas, chemical, water supply and drainage industries.Three-layer polypropylene (3PP, Three-Layer Polypropylene) coated welded carbon steel pipe is a high-performance anti-corrosion pipeline widely used in long-distance transmission pipelines in the oil and gas, chemical, water supply and drainage industries. The 3PP coating structure is similar to 3LPE, but it uses polypropylene material and has unique performance characteristics.

Tianjin Yuantai Group has 65 black high-frequency welded steel pipe production lines, 26 hot-dip galvanized steel pipe processing production lines, 10 pre-galvanized steel pipe production lines, 8 photovoltaic bracket production lines, 6 ZMA steel pipe production lines, 3 spiral welded pipe production lines, 2 ZMA steel coil production lines, and 1 JCOE production line. The size range of square pipes is 10x10x0.5mm~1000x1000X60mm, the size range of rectangles is 10x15x0.5mm~800x1200x60mm, and the size range of round pipes is 10.3mm~2032mm. The wall thickness range is 0.5~80mm. It has more than 100 technical patents for steel hollow profiles.Production types include ERW, HFW, LSAW, SSAW, seamless, hot rolled, cold drawn, hot finished, etc.Q195 = S195 / A53 Grade AQ235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2Q345 = S355JR / A500 Grade B Grade CQ235 Al killed = EN39 S235GTL245 = Api 5L / ASTM A106 Grade BWelcome to learn more about our products.📩 sales@ytdrgg.com;☎ Whatsapp: +8613682051821

Black pipe is plain steel pipe without any protective coatings. Black pipe is used for a variety of applications around the home. It is very common to see black pipe used for your natural gas line and sprinkler system lines. Since black pipe has no protective coating, it may rust easily in wet or humid environments. To stop the pipe from rusting or corroding on the outside, you should provide a layer of protection on the outside of the pipe. The easiest method is painting it.Black pipes (carbon steel pipes without coating treatment) are susceptible to corrosion and other damages because their surfaces are directly exposed to the environment. In order to extend the service life of black pipes and ensure their stable performance, it is very important to take appropriate protective measures. The following are several common protection methods:1. Surface pretreatmentCleaning: Before any anti-corrosion treatment, the surface of the black pipe must be thoroughly cleaned to remove impurities such as oil, rust, and scale. Common methods include sandblasting, pickling, and mechanical grinding.Drying: Ensure that the surface of the steel pipe is completely dry to avoid residual moisture affecting the effect of subsequent treatment.2. Anti-corrosion coatingPainting: Use paint with good weather resistance and chemical resistance, such as epoxy resin paint, polyurethane paint, etc. This can provide a physical barrier for the black pipe to prevent moisture and oxygen from contacting the metal surface.Hot-dip galvanizing: The black pipe is immersed in molten zinc liquid to form a uniform and strongly adherent zinc layer. Zinc, as a sacrificial anode, is preferentially oxidized when encountering a corrosive environment, thereby protecting the steel pipe matrix.Powder coating: Electrostatic spraying technology is used to apply fused epoxy powder or other types of powder coatings, which form a strong and durable protective film after curing.3PE/3PP coating: For long-distance transmission pipelines, three-layer polyethylene (3PE) or three-layer polypropylene (3PP) composite coatings can be considered. These coatings not only provide excellent corrosion protection, but also have good mechanical strength and weather resistance.3.Storage and transportation protectionMoisture-proof packaging: During storage and transportation, moisture-proof paper, plastic film and other materials should be used to wrap the black pipes to avoid corrosion caused by humidity.Support and fixation: Reasonably arrange the stacking method, use wooden pads or other supports to keep the pipes stable, and prevent surface damage caused by collision and friction.

RHS stands for Rectangular Hollow Section, that is rectangular steel pipe.We also have square hollow section steel pipe, according to standard: ASTM A500 , EN10219 , JIS G3466 , GB/T6728 cold formed square and rectangular steel pipe.RHS usually refers to rectangular hollow steel in steel, which is the abbreviation of Rectangular Hollow Section. This steel is hollow and has a rectangular cross-section and is often used in construction and structural engineering.Shape: Hollow steel pipe with rectangular or rectangular cross section, with four corners likely rounded corners (depending on manufacturing standards).Features: Light weight, strong bending and torsional resistance, suitable as structural support or frame material.Common application scenarios1. Building structureUsed to build beams, columns or frames of houses, bridges, and factories.2. Machinery manufacturingAs equipment brackets, conveyor tracks, etc.3. Furniture/decorationThe skeleton material of modern style furniture (such as metal tables and chairs, shelves).4. Vehicles and shipsParts that require lightweight design, such as car bodies and hulls. RHS Rectangular Hollow SectionCross-sectional shape：Rectangular/rectangular (hollow)Features: Strong bending resistance, suitable for load-bearing structures CHS  Circular Hollow SectionCross-sectional shape: round (hollow)Features: Uniform pressure resistance, suitable for fluid pipelines SHS Square Hollow SectionCross-sectional shape: Square (hollow)Features: strong symmetry, suitable for frame connection International standards and specificationsMaterial: Commonly carbon steel (such as Q235, S355), stainless steel or aluminum alloy.Standards:Europe: EN 10219 (cold-formed hollow steel section)USA: ASTM A500 (carbon steel for structure)Japan: JIS G3466 (welded hollow steel section)Dimensions: usually marked as height × width × wall thickness (for example: 50 × 30 × 3 mm).

Tianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd. has become a leading enterprise in the field of steel pipe manufacturing with over 23 years of professional experience. Our commitment to quality and excellent service places us in an important position in the industry.Our company produces:Hot rolled rectangular tube: 20 * 20-1000 * 1200mmWall thickness: 1.0-50mmArchitectural structural steel pipes, galvanized pipes LSAW、ERW、SSAW steel pipe、Irregular pipes, glass curtain wall right angle pipes, Ferris wheel hexagonal pipes, octagonal pipes, trapezoidal pipes, bullet head pipes, etc. LSAW manual submerged arc welding round pipe406～1420MM wall thickness up to 50MMBuilding structure pipe, ship pipe with maximum wall thickness of 30MM, API 5L fence pipe Tangshan Plant:Zinc-aluminum-magnesium coil steel 550-1010, wall thickness 0.5-2.75mmGalvanized layer: 30g/m2~400g/m2Low aluminum and low magnesiumNew production lines are Zhonglu, Zhongmagnesium,Zinc-aluminum-magnesium strip steel square tube, rectangular tubeOther production units: black round tube, square tube, hot dip galvanizing plant

TT, L/C(For big order,30-90 days can be acceptable).

Reasons for Steel Pipe RustingSteel pipe rusting is a complex chemical process, which is mainly caused by the following factors:1. Oxidation reactionThe main component of steel is iron (Fe), and oxidation reaction occurs when iron comes into contact with oxygen (O₂) in the air.2. The role of moistureWater is not only a catalyst for oxidation reaction, but also dissolves carbon dioxide in the air to form a weak acid solution, which further accelerates the corrosion of the metal surface.3. Electrochemical corrosionIn the presence of moisture, micro-battery structures will form on the surface of steel.4. Environmental factorsHumidity: In a high humidity environment, the moisture content in the air is higher, which increases the possibility of oxidation reaction.Temperature: Increased temperature usually accelerates the rate of chemical reactions, including oxidation and corrosion processes.Pollutants: Pollutants in the atmosphere such as sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) can combine with water to form acid rain, exacerbating the corrosion of steel.Soil conditions: Buried steel pipes are easily affected by factors such as soil type, pH value, and water content. Some types of soil are highly corrosive.5. Mechanical damageIf the surface of the steel pipe is scratched, hit or otherwise physically damaged, destroying the original protective layer (such as coating or galvanizing), the exposed metal part is more susceptible to corrosion.6. Influence of internal mediumFor steel pipes that transport fluids, the nature of the internal medium will also affect its corrosion. For example, transporting acid and alkali solutions, seawater or liquids containing dissolved oxygen will accelerate the corrosion of the inner wall of the pipe.

1. OD 219mm and below In hexagonal seaworthy bundles packed by steel strips, With two nylon slings for each bundles2. above OD 219mm in bulk or according to custom opinion3. 25 tons/container and 5 tons/size for a trial order;4. For 20" container the max length is 5.8m;

Alloy Steel refers to steel that intentionally adds one or more alloying elements (such as chromium, nickel, molybdenum, vanadium, titanium, etc.) to carbon steel to improve and enhance its performance. These alloying elements can significantly improve the strength, toughness, corrosion resistance, wear resistance, high temperature stability and other special properties of steel, making it suitable for various harsh working environments and complex applications.ClassificationAccording to the content and type of alloying elements, alloy steel can be divided into the following categories:Low Alloy SteelThe total content of alloying elements usually does not exceed 5%.Representative alloying elements include manganese (Mn), silicon (Si), chromium (Cr), nickel (Ni), molybdenum (Mo), etc.Features: Compared with carbon steel, it has higher strength and better toughness and corrosion resistance.Application: Widely used in building structures, bridges, vehicle manufacturing and other fields.Medium Alloy SteelThe total content of alloying elements is generally between 5% and 10%.Common alloying elements include chromium (Cr), nickel (Ni), molybdenum (Mo), vanadium (V), etc.Features: high strength, high hardness, good hardenability and heat resistance.Application: suitable for manufacturing mechanical parts such as gears, shafts, springs, and parts that need to withstand greater stress.High Alloy SteelThe total content of alloy elements exceeds 10%.Including stainless steel, heat-resistant steel, high-speed steel and other types.Features: excellent corrosion resistance, oxidation resistance and high-temperature strength.Application: widely used in chemical equipment, aerospace, medical equipment, knives and molds and other industries.Performance advantagesStrength and hardness: By adding specific alloying elements, alloy steel can obtain higher strength and hardness than carbon steel, so as to adapt to more complex and harsh working conditions.Toughness and ductility: Certain alloying elements can improve the toughness and ductility of steel and reduce the risk of brittle fracture, especially in low temperature environments.Corrosion resistance: For example, chromium (Cr) and nickel (Ni) can form a dense oxide film, which effectively prevents corrosion and prolongs service life.Wear resistance: Elements such as molybdenum (Mo) and vanadium (V) can significantly improve the wear resistance of steel, making it suitable for manufacturing wear-resistant parts.High temperature stability: Elements such as molybdenum (Mo) and tungsten (W) give alloy steel good high temperature strength and creep resistance, enabling it to work stably in high temperature environments. Manufacturing process The manufacturing process of alloy steel usually includes the following steps: Smelting: Mix molten iron with the required alloying elements in proportion and melt them in an electric furnace or converter. Casting: The molten alloy steel is poured into a mold and cooled and solidified to form a billet or casting. Rolling: The billet is processed into steel of the required shape and size through hot rolling or cold rolling. Heat treatment: In order to further optimize the mechanical properties, alloy steel often needs to undergo heat treatment processes such as annealing, normalizing, quenching, and tempering. Application areas Due to its excellent performance, alloy steel is widely used in various industrial fields: Machinery manufacturing: used to manufacture various mechanical parts, such as gears, bearings, shafts, etc. Construction engineering: used to build high-rise buildings, bridges, tunnels and other infrastructure. Transportation: The key components of transportation vehicles such as automobiles, trains, and airplanes are mostly made of alloy steel. Petrochemical: used to manufacture corrosion-resistant equipment such as reactors, pipelines, and valves. Power industry: Alloy steel materials are commonly used in high-temperature and high-pressure equipment such as boilers and steam turbines. Medical devices: Alloy steel is also used in surgical instruments, implants and other products that require high biocompatibility and corrosion resistance. Summary By adding the right amount of alloying elements, alloy steel greatly improves the performance of steel, enabling it to meet the needs of different industrial fields. Choosing the right alloy steel not only helps improve the quality and life of the product, but also reduces maintenance costs, achieving a win-win situation in economic and social benefits. If you have more specific questions about alloy steel or need further help, please feel free to let me know. I hope the above information can provide you with valuable reference.

A process for further refinement of stainless steel through reduction of carbon contentThe amount of carbon in stainless steel must be lower than that in carbon steel or lower alloy steel (i.e., steel with alloying element content below 5%). While electric arc furnaces (EAF) are the conventional means of melting and refining stainless steel, AOD is an economical supplement, as operating time is shorter and temperatures are lower than in EAF steelmaking. In addition, using AOD for refining stainless steel increases the availability of the EAF for melting purposes.Molten, unrefined steel is transferred from the EAF into a separate vessel. A mixture of argon and oxygen is blown from the bottom of the vessel through the melted steel. Cleaning agents are added to the vessel along with these gases to eliminate impurities, while the oxygen combines with carbon in the unrefined steel to reduce the carbon level. The presence of argon enhances the affinity of carbon for oxygen and thus facilitates the removal of carbon.

The corrosion of structural steel is an electrochemical process that requires the simultaneous presence of moisture and oxygen. In the absence of either, corrosion does not occur. Essentially, the iron in the steel is oxidised to produce rust, which occupies approximately 6 times the volume of the original material consumed in the process. The general corrosion process is illustrated here.As well as general corrosion, there are various types of localised corrosion that can also occur; bimetallic corrosion, pitting corrosion and crevice corrosion. However, these tend not to be significant for structural steelwork.The rate at which the corrosion process progresses depends on a number of factors relating to the ‘micro-climate’ immediately surrounding the structure, principally the time of wetness and the atmospheric pollution level. Because of variations in atmospheric environments, corrosion rate data cannot be generalised. However, environments can be broadly classified, and corresponding measured steel corrosion rates provide a useful indication of likely corrosion rates. More information can be found in BS EN ISO 12944-2 and BS EN ISO 9223The components of steel structure shall be painted with primer and sealing paint at the production site, and then painted with intermediate paint and fluorocarbon paint (gray) at the construction site, and the color of the paint will become gray. After assembly, apply "top coat" and "top coat" for six times to achieve the best anti-corrosion effect.

Tianjin Yuantai Derun Steel Pipe Manufacturing Group was established in 2002 and is headquartered in Daqiuzhuang Industrial Zone, Tianjin. The company has an annual production capacity of 10 million tons.Tianjin Yuantai Group has 65 black high-frequency welded steel pipe production lines, 26 hot-dip galvanized steel pipe processing production lines, 10 pre-galvanized steel pipe production lines, 8 photovoltaic bracket production lines, 6 ZMA steel pipe production lines, 3 spiral welded pipe production lines, 2 ZMA steel coil production lines, and 1 JCOE production line.We have our own logistics team and will contact and arrange the shipment process of the goods as soon as they are produced. Generally it is 3-5 days if goods are in stock. or around 25 days if the goods are not in stock and it is according to order requirement. To South Africa: 45 daysTo Middle East: 30 daysTo South America: 60 daysTo North America: 30 daysTo Russia: 7 daysTo Europe: 45 daysTo South Korea: 5 daysTo Japan: 5 daysTo Vietnam: 15 daysTo Thailand: 15 daysTo India: 30 daysTo Indonesia: 15 daysTo Singapore: 10 days

Yuantai Derun was established in 2002 and is a global steel company that is a leader in square tube and structural steel pipe related services. It has a total of more than 2,200 employees, 18 subsidiaries, 100+ production lines, and national CNAS laboratory certification. The company is a large-scale joint enterprise group that mainly produces black square tubes, galvanized square tubes, double-sided submerged arc welded straight seam welded pipes, structural round pipes, spiral welded pipes, etc., and is also engaged in logistics and trade. Yuantai is one of the top 500 private enterprises in China and one of the top 500 manufacturing companies in China. Tianjin Yuantai Group has 65 black high-frequency welded steel pipe production lines, 26 hot-dip galvanized steel pipe processing production lines, 10 pre-galvanized steel pipe production lines, 8 photovoltaic bracket production lines, 6 ZMA steel pipe production lines, 3 spiral welded pipe production lines, 2 ZMA steel coil production lines, and 1 JCOE production line.Production types include ERW, HFW, LSAW, SSAW, seamless, hot-rolled, cold-drawn, hot-finished, etc. It is a 5A-level enterprise in management and management and a 3A-level enterprise with the highest credit. The group has passed ISO9001 certification, ISO14001 certification, OHSAS18001 certification, EU CE10219/10210 certification, BV certification, JIS certification, DNV certification, ABS certification, LEED certification, API 5L certification, EN10210/10219 certification, BC1 certification. Yuantai Derun's mission is to provide excellent products and services to steel pipe users, aiming to make structural steel pipes more widely used in global economic development and construction, so that all partners can do business more easily.