Tất cả bài viết

Galvanized steel has high corrosion resistance in the natural environment, so it is widely used in the construction and civil industry. Importing Vietnamese galvanized steel helps customers benefit from low cost and quality products. In this article, MRS Steel will list the top 4 largest GI manufacturing companies in Vietnam for you to be a reliable source.1. Hoa Sen GroupOvercoming the effects of the Covid-19 epidemic, Hoa Sen Group is still on growth track and maintains its leading position in the Vietnamese coated steel market with 34% market share.Besides the strategies to promote the development of the domestic market, HSG also continuously creates new breakthroughs in the export of galvanized steel sheets.According to the report of the Vietnam Steel Association (VSA) 2022, Vietnam's galvanized steel sheet exports reached 2.1 million tons and Hoa Sen still maintained the No. 1 position in the market with nearly 35% market share. In 2018, Hoa Sen's galvanized sheet export was at 639,000 tons, accounting for nearly 37% of the total export volume of galvanized steel in the whole industry. On average, the group exports about 50,000 - 60,000 tons/month to more than 75 countries and territories around the world, especially fastidious markets that require strict standards like the US, the Europe, Middle East,…As a leading steel and sheet exporter in Southeast Asia, Hoa Sen Group is operating 11 large factories that are invested with the world's most modern equipment and technology. Gimeco - Italy's fully automatic production line system includes 6 black steel pipe rolling lines, 1 slitting line, 1 hot-dip galvanizing line with a designed capacity of 85,000 tons/year.HSG's galvanized steel products are manufactured on advanced, environmentally friendly NOF technology lines and meet the most stringent requirements such as Japanese standards JIS G3302, ASTM A653/A653M (USA) , AS 1397 (Australia), EN 10346 (Europe), MS 2384, MS 2385 (Malaysia), SNI 07-2053 (Indonesia). Currently, Hoa Sen's NOF galvanized steel production line has a total capacity of more than 2,200 tons/year.2. Ton Dong ATon Dong A’s development orientation is a manufacturer of quality GI, GL, PPGI/PPGL both in the domestic and export markets. Ton Dong A currently has 4 Continuous Hot-Dip Galvalume/Galvanize Coating lines integrated with environmentally harmless NOF high-tech equipment. This is a technology of surface cleaning and mechanical treatment according to the requirements of the input materials before being put into galvanizing. The NOF annealing furnace is fully automatic controlled to optimize the heat treatment process, resulting in the highest quality finished products.The coating surface of the product is optimally controlled thanks to Danieli Kohler air knife. The device from Italy has the effect of optimizing aerodynamics with baffle at two edges, ensures the most perfect barrier at the edges and achieves a consistent spangles.Besides, Ton Dong A's galvanized line has a full range of oil-coated, Antifinger, Chrom-Mat equipments according to OIL TECH electrostatic technology.The coating tweight gauge is installed immediately behind the cooling tower with high accuracy, allowing stable measurements at all levels without contact with the steel sheet. With the tension leveller imported directly from the Italian Danieli latest version including 2 bending, 1 C-roll cluster and 1 L-roll, handling all deformation problems such as Wavy Edge, Center Buckle, Camber. Galvanized steel products from Ton Dong A meet Japanese standards JS G3302, ASTM A653, Australian standards AS1397, European standards BS EN 103463. Ton Nam KimTon Nam Kim is one of the leading enterprises specializing in the production of galvanized steel products in Vietnam, pioneering the application of technology investment in the processing process. Currently, Ton Nam Kim's galvanized steel has been exported to more than 50 countries and regions around the world.Ton Nam Kim invests in the most advanced technological equipment in the steel industry such as SMS (Federal Republic of Germany), Drever (Belgium) and input materials from famous brands such as Nippon Steel, Hyundai Steel, CSC,... All finished products are subjected to severe quality control processes, achieved international standards such as JIS, AS, ASTM, EN, ISO 9001 and ISO 14001.NKG is putting into operation 5 metallic coating lines with NOF (NON-Oxidizing Furnaces) technology – the most modern furnace used for the galvanizing process. The lines are manufactured by SMS Group, integrated advanced technologies in the industry such as EMG, Drever, Ajax,... The coating pans which use ceramic technology and faradaic induction heating technology allow heating equally 2 sides of the steel sheets anh therefore be able to produce better product quality and higher aesthetics.4. Hoa Phat GroupHoa Phat's coated sheet was first introduced to the market in April 2018 with key product lines such as Color coated sheet, Premium sheet, Galvanized steel, Panel sheet, Anti-fingerprint coated … Hoa Phat is invested synchronously and modernly from push/pull pickling line with designed capacity of 600,000 tons/year, 2 reversing cold rolling mill with a capacity of 200,000 tons/year/line and 2 galvanizing/continuous galvalume lines with a design capacity of 150,000 - 350,000 tons/year/line.Besides, Hoa Phat is the first and only manufacturer in Vietnam to be self-sufficient in hot rolled coil (HRC) raw materials to help the mills control quality from input to output. In addition, with 100% Vietnamese product origin, Hoa Phat's galvanized steel is easily exported to major markets, with strict requirements on origin.Above is information about the production capacity of top GI manufacturing companies in Vietnam. If customers want to quote and order GI of Vietnam, please contact MRS Steel via Whatsapp: +84 76 911 2358

Besides aluminum-coated coils, galvanized steel coils are also widely used materials in many fields. Have you fully understood the characteristics, pros and cons of galvanized steel coils and how the galvanizing process takes place? 1. What is Galvanized Steel Coil?Galvanized steel coil is a material that is coated with an outer layer of zinc to protect the product from the effects of the surrounding environment such as temperature, humidity, air,... Thereby, limiting the possibility of rust , anti-oxidation and corrosion to increase strength and life span of coils.2. Methods of galvanizing steelCurrently, there are 3 most commonly used galvanizing methods: cold galvanizing, hot -dipping galvanizing and electro galvanizing.2.1. Cold galvanizing methodCold galvanizing is a method of coating a layer of liquid zinc on the surface of the product at room temperature and then putting it through a cold galvanizing process. Here, the mill uses compressed air to blow a liquid solution to form a beam of zinc particles that shoots onto the metal surface. In the solution, there are additives to help the coating adhere firmly to the metal surface and harden in a short time. Cold galvanizing technology helps to improve the corrosion resistance of metal, so it is the best solution for galvanizing metal materials on site.2.2 Hot dip galvanizing methodHot-dip galvanizing is the most popular coating technology today, capable of effectively protecting coils from the effects of the environment. This process starts from dipping the product into a molten solution to form a strong, non-flaking base and a smooth, highly aesthetic product surface.2.3. Electrolytic galvanizing methodElectrolytic galvanizing is a method of electrocoating that forms a thin layer of metal on the surface of coil for the purpose of preventing metal corrosion, increasing electrical conductivity, size and hardness. In fact, the electrolytic galvanizing method is used for steel products such as water pipes, railways, outdoor equipment, bearing equipment, machine parts,...3. Standard galvanizing processThere are 3 methods of galvanizing steel, but hot-dip galvanizing is still the most commonly used method in Vietnamese factories with the following standard implementation process:Step 1: Metal surface treatmentSteel made from iron ore or recycled steel also contains many impurities, dirt and oil that reduce the ability to adhere to the coating layer. Therefore, the material needs to be soaked in the degreasing solution for 10 - 15 minutes and transferred to a solution of hydrogen chloride concentration of 8 - 15% to remove rust.Step 2: Embed Soldering fluxAfter the steel is cleaned, it has dipped into the flux for about 3 - 20 seconds at normal temperature to completely remove the oxide and iron ions on the surface of the product. This is also the step that creates a coating that protects the steel from oxidation.Step 3: Hot dipped galvanizedSteel will be completely immersed in the galvanizing bath at the melting temperature (454 - 465 degrees Celsius) to create a layer of zinc coating on the surface. After completing the hot dipping process, performing slag scraping on the surface combined with vibration to remove excess zinc, the product will be coated with a layer of chromate to protect the surface comprehensively.Step 4: Cool down and check qualityIn order for the surface of the galvanized steel coil to be bright and beautiful, the product is cooled by an overflow bath. Experts observe and calculate the thickness of the coating by using specialized gauges to ensure that the finished product meets the specifications and requirements of the customer.4. Pros and cons of galvanized steel coilLow costThe production cost of galvanized steel coil is much lower than other surface protection coating methods, so it is the first choice for large-scale construction projects.DurableThe zinc coating protects the coil from rust, environmental corrosion and chemical reactions of the inner steel components. According to research, galvanized steel coil has high durability, using life up to 50 years in ideal conditions and from 20-25 years in harsh conditions such as industrial zones, coastal areas,...AestheticsCompared with conventional steel products, galvanized steel coils have a shiny, smooth surface and are easily coated with high-grade color paint to increase aesthetics.Reduce maintenance costsGalvanized steel products have high durability, long service life, so it does not cost a lot of maintenance and regular maintenance during use.5. Application of galvanized steelGalvanized steel possesses high strength, good bearing capacity, is a familiar material in popular applications including:Deck floor application to replace floor formworkVentilation ducts for apartments, high-rise buildings, shopping centers, factories, etc.Producing purlinProducing all kinds of steel pipes, water supply and drainage pipes, oil and gas pipelines, vehicle accessories,...Producing household appliances, furniture…6. Vietnam's export strength of galvanized steel coilWith investment in infrastructure, modern equipment and strictly selected raw materials, Vietnam galvanized steel coil mills provide product lines with thicknesses from 1.5 to 3.0mm, coating degree Z275 - Z350, strength up to G450.FDI projects especially favor these types of galvanized steel because of their durability. high quality and good resistance to environmental conditions, so the life of the works can be up to 50 years.In addition, galvanized steel coils also meet many international standards such as JIS G3302 of Japan, BS EN 10346 of Europe, AS 1397, ASTM A792 of the United States, conquering many difficult export markets such as the EU, the United States, Korea and Southeast Asia,... This is the result of the factory synchronizing production lines imported from the world's most advanced metallurgical and equipment corporations such as Danieli, Tenova and the G7.MRS Steel is one of the exporters of quality galvanized steel, committed to international standards and specifications from customers. For any specific advice and quotation, please contact MRS Steel via Whatsapp: +84 76 911 2358 for 24/7 support.

Purlins are one of the materials that help support the structural framework, most often below the roof. Purlins carry the roof desk load and are supported by building walls, steel beams, rafters,... Purlins are an indispensable part of every project, so choosing the perfect purlin ensures the safety of the entire building. In this article, MRS Steel will share some tips for choosing the most suitable purlins to make the roof frame for the project.1. Choose the appropriate purlin materialPurlins combine with rafters to create a roof frame, combining the support of beam frames, walls or steel beams. When choosing the material of the purlin, importer can consider between black pipe steel, galvanized steel or high-strength steel. Each material has pros and cons in terms of strength and cost, so importers need to assess the building design to choose the most optimal material. However, to ensure the safety of the project, steel purlins must be able to withstand high loads, resist corrosion, rust and be unaffected by environmental factors.2. Choose the ideal type of purlinThis is one of the important factors when deciding which type of purlin for your project. C and Z shaped purlins are the two most popular types, have high applicability and unique characteristics as follows:C purlins are made from black or galvanized steel with a C shape and used in structural framework for factories, houses,... Importers can contact MRS Steel for advice on the most suitable dimensions, thickness and length for their specific application.Z purlins are manufactured from hot-rolled, cold-rolled, galvanized steel, shaped like the letter Z, so it is easy to stack and connect through bolted joints. Because of this characteristic, the Z shaped purlin has a higher thickness and durability than the C shaped purlin.3. Install purlins properlyCalculating the distance to install purlins compared to the corrugated iron roof in a reasonable, economical and safe way is important in choosing purlins for the project.Firstly, safety and sustainability are the top criteria, requiring the distance between purlins and corrugated iron roofs to be standard and reasonable. Next, if the purlins are not aligned or installed too far or too close, roofing will cost a lot of time and money. Finally, if the purlin distance is not suitable, it also reduces the building's load-bearing capacity, especially making it difficult to repair and maintain periodically.4. No weld/heat cutWelding or heat cutting methods are not used when installing purlins because high temperatures can affect the durability and strength of the purlins.5. Choose a reputable supplier and manufacturerPurlins are a key part in construction projects, so factories always produce many specifications to meet all customer needs. Importers can also find cheap sources from China, India,... but for some countries with strict regulations on C/O or trade defense measures, this option is not feasible. Meanwhile, Vietnam belongs to the group of countries with a developing economy, so it enjoys many preferential duty rates and import policies to the EU, United States, Australia, Mexico, Malaysia,...Vietnam has crude steel output ranked 13th on the world steel map and the largest in Southeast Asia, ensuring abundant and high-quality supply for customers. Many of Vietnam's largest factories do not receive orders directly from importers but through intermediary support units such as MRS Steel.MRS Steel provides solutions for importing Vietnamese steel to more than 30 countries around the world, with a network of links with many reputable steel factories and shipping lines to promote the fastest and most optimal delivery process. Importers can contact us via Email: vanloc@mrssteel.com.vn or Hotline: +84 28 36 22 33 58 for more detailed advice on the Vietnamese steel market and products.

Purlins are a specialized material used in frameworks and prefabricated houses to structural support and prevent rust and termites. Vietnam's increasingly developed manufacturing techniques have created many different types and standards of purlins. 1. What Is PurlinIn construction, a purlin is a horizontal bar or beam used in a roof support system. They are most commonly in buildings and are supported by the building’s rafters and its wall. Purlins are classified based on material and shape, serving different purposes. Purlins are very important in architecture and structure because without them, we cannot tile any other material on the roof.2. Types of Purlin in Steel BuildingC Shaped PurlinC shaped purlins are horizontal C-shaped bars that are light in weight, good strength and easy processing. The flat surface of the purlin is perforated to increase flexibility during assembly and construction. They are widely used in the construction of factories, houses, warehouses, shopping centers, airports,...Products commonly used for projects with column pitch <6m with common specifications are C200x50x1.8, C150x50x20x1.5,...Z Shaped PurlinZ shaped purlins are made with oval holes to easily connect the purlins together with bolts. This type is lightweight, easy to process and has better bearing capacity than C-shaped purlins. They are mainly used in projects with large areas such as factories, cold storages, commercial centers,... The most popular specifications are Z200x72x78x2.0, Z200x62x68x1.8,...Black Steel PurlinBlack steel purlins are made from hot-rolled black steel, known for its lightness, durable, heat-resistant, environmentally friendly and less deformed under strong impacts. However, black steel purlins are less widely used, especially in high-end projects because of their low aesthetic factor, low roughness and easy rust.Galvanized purlinsGalvanized purlins are black steel purlins covered with a layer of zinc plating to protect the surface. This enhances their durability, resistant to force and temperature and are especially resistant to rust and corrosion under weather conditions. High strength purlinHigh-strength purlins are manufactured by modern technology with higher quality than conventional purlins. The product has the ability to withstand high temperatures, the yield limit reaches a minimum of 350 MPa ~ 4500kg/cm2, light weight, large spans while still ensuring deflection within the standard range.3. What Purpose Do Purlins Serve In Construction?Purlins are divided into two types: roof purlins and regular purlins. In the prefabricated steel structures, builders often connect the purlins with round or V-shaped bars to firmly stabilize the purlin system.For columns of large factories with heights of 9-12m, purlins are supported by V-shaped struts to enhance the bearing capacity of the works. In addition to the role of bearing the roof load and human load, purlins are calculated and designed to bear the hanging load of wind ceilings, duct systems, electricity or decorative furniture.4. Where To Import Reputable And Quality Purlins From Vietnam?Steel purlins are one of the highly applicable products but not all purlins from every factory meet the required standards. In particular, some countries attach great importance to the issue of C/O when importing, so purlins must prove the origin of input materials.Vietnam is a country with crude steel output ranked 13th globally, advanced production technology, imported machinery systems from the most famous metallurgical brands such as Danieli, Tenova,... This has created the quality of Vietnamese steel, making Vietnam the largest steel industry in Southeast Asia.Under the escalating world economic and political situation, finding a reputable, quality steel supply source that is not in the group of embargoed countries is difficult for importers. Understanding these things, MRS Steel is a unit specializing in providing solutions to support the import of Vietnamese steel to more than 30 countries around the world. Our team of experts will be responsible for the entire steel import process from A-Z, ensuring customers can receive goods on time as agreed.For more in-depth advice on steel purlins and many other Vietnamese steel products, please contact via Email: vanloc@mrssteel.com.vn or Whatsapp:+84 76 911 2358 for the latest price updates.