Blog

Rectangular hollow section (RHS) is widely used in civil and industrial construction due to its numerous outstanding advantages, including high durability, ease of construction, low cost, and high load capacity. In this article, MSR Steel will go into greater detail about selecting the appropriate size RHS, the best price and the reputation of the most well-known brands in Vietnam.1. What is rectangular hollow sectionRectangular hollow section is a type of steel manufactured in hollow blocks with a common thickness of 0.7-4mm, the smallest size of RHS is 10 x 30mm and the largest is 60 x 120mm. RHS has a high carbon content, enhancing its strength and resistance to external impacts. Some RHS products are hot-dip galvanized to add anti-oxidation and anti-corrosion properties.2. Some applications of RHSRectangular hollow section is widely used in the construction and civil industries, specifically:Fences, walls, doorsApplication in steel structure, prefabricated houseAutomotive manufacturing sectorHousehold appliancesShipbuildingContainer productionHousing structure, agricultural greenhouseFurniture…3. Advantages of rectangular hollow sectionHigh QualityDue to its high carbon content, RHS is extremely durable and resistant to metal corrosion. This feature contributes to the extended lifespan of RHS-based construction projects. Low costIt is made up of materials that are easy to find and available, so the price is quite cheap. Because of this, using RHS helps to save construction costs for investors.Long life expectancyRHS is resistant to corrosion and rust, so the average life expectancy of the product is usually 60-70 years.DurableCarbon is one of RHS's main materials, so the product's surface is harder than regular steel.Durable coatingRectangular hollow section can be coated with zinc to resist mechanical impacts to serve applications such as means of transport, construction and some other industries.4. Rectangular hollow section dimensions/sizes tableSize (mm)kg/mSize (mm)kg/m40 x 20 x 2.01.6840 x 20 x 2.52.0340 x 20 x 3.02.3640 x 25 x 1.51.4440 x 25 x 2.01.8940 x 25 x 2.52.2350 x 25 x 2.02.2150 x 25 x 2.52.7250 x 25 x 3.03.2250 x 30 x 2.52.9250 x 30 x 3.03.4550 x 30 x 4.04.4650 x 40 x 3.03.7760 x 40 x 2.02.9360 x 40 x 2.53.7160 x 40 x 3.04.3960 x 40 x 4.05.7270 x 50 x 23.5670 x 50 x 2.54.3970 x 50 x 3.05.1970 x 50 x 4.06.7180 x 40 x 2.54.2680 x 40 x 3.05.3480 x 40 x 4.06.9780 x 40 x 5.08.5480 x 50 x 3.05.6680 x 50 x 4.07.3490 x 50 x 3.06.2890 x 50 x 3.67.4690 x 50 x 5.010.11100 x 50 x 2.55.63100 x 50 x 3.06.75100 x 50 x 4.08.86100 x 50 x 5.010.90100 x 60 x 3.07.22100 x 60 x 3.68.59100 x 60 x 5.011.70120 x 80 x 2.57.65120 x 80 x 3.09.03120 x 80 x 4.012.00120 x 80 x 5.014.80120 x 80 x 6.017.60120 x 80 x 8.022.9150 x 100 x 5.018.70150 x 100 x 6.022.30150 x 100 x 8.029.10150 x 100 x 10.035.70160 x 80 x 5.018.00160 x 80 x 6.021.30160 x 80 x 8.027.90200 x 100 x 5.022.70200 x 100 x 6.027.00200 x 100 x 8.035.4200 x 100 x 10.043.60250 x 150 x 5.030.5250 x 150 x 6.038.2250 x 150 x 8.048.0250 x 150 x 1059.3300 x 200 x 6.048.10300 x 200 x 8.060.50300 x 200 x 10.075.00400 x 200 x 8.073.10400 x 200 x 10.090.70400 x 200 x 16142.005. Where to import quality rectangular hollow sections?Hoa Phat, Hoa Sen, Ton Nam Kim, Pomina and a number of other businesses in Vietnam specialize in the production of prestigious and high-quality RHS. All of these products are manufactured in accordance with cutting-edge technology lines imported from the largest metallurgical equipment manufacturers in the world such as Danieli, Tenova,..., meeting ASTM, JISG standards.Therefore, Vietnam's rectangular hollow section has very high durability, good pressure resistance, suitable for many types of works. Raw steel materials are also selected from major corporations in the world such as Nippon Steel (Japan), Hyundai Steel (Korea), CSC (Taiwan),... Moreover, in all production stages, RHS are all strictly quality checked, committed to ISO 9001 and ISO 14001 and other international standards to export in fastidious markets such as the UK, US, Japan and Europe.With the advantages and wide applicability in life, the rectangular hollow section is one of the most exported products of Vietnam. Any questions about the Vietnam steel market and the need to import genuine domestic steel, please contact MRS Steel via Email: vanloc@mrssteel.com.vn.

With their compressive resistance, tensile resistance, and toughness, round steel hollow section are often used for many different purposes in civil works. They are usually commercially available as hot-rolled coils or cold-formed sections.1. What is a round steel hollow section?Round steel hollow section is also known as round steel pipe or round steel tube. Is a typical type of steel used in civil engineering. They have smooth and clean joints, do not have sharp edges and are not convex or concave. Thanks to their properties, circular steel hollow section can be excellent choices for columns, struts, tie rods,...However, at present, the use of round steel hollow section in construction is not popular, mainly because circular steel hollow section products require complicated details in joints, so the product is often relatively expensive.2. Advantages of a round steel hollow sectionHigh aestheticsA round steel hollow section is a circular steel hollow section that is applied in many fields of mechanics, structure and construction. Circular steel pipe has clear and consistent lines; its smooth, glossy, concave finish makes the round steel hollow section the perfect choice for aesthetic purposes. In addition, the rational use of hollow parts inside steel also makes the building cleaner and more spacious.Corrosion resistanceAs a hollow structure made from joints welded together, round steel hollow section help protect steel better than other shaped steels. Especially at joints, where there is a smooth transition from one section to another. This contributes to an increase in the protective time of the coating, which helps resist corrosion. The results have been checked through numerous assessments conducted in various countries.Using internal spaceOne of the special advantages of the round steel hollow section compared to other types of steel is taking advantage of the internal space. The hollow inside of the circular steel pipe is used for various purposes such as pouring concrete, fire protection, heating and ventilation,... In addition, in other cases, internal gaps are used to install electrical wiring.3. Applications of round steel hollow sectionMaking concrete pillarsThe hollow parts of the round steel hollow section are often used to pour concrete, meeting the load capacity of the building. The application of concrete to the columns of the circular steel tube not only increases the bearing capacity but also helps to increase the fire resistance time.Application of fire resistance to buildingsOne of the modern methods of fire resistance is the use of a round steel hollow section . The columns are connected to a large water tank, and in the event of a fire, the convective circulation of water helps increase the fire resistance of buildings. Typically, this method is used with buildings with eight floors or more.Heating and ventilationIn large buildings, the inner section of the round steel hollow section is used to circulate air for heating and ventilation. For heating and ventilation applications, the circular steel tube maximizes floor space by eliminating heat exchangers, contributing to uniform heating of the entire floor.The above article contains information about the round steel hollow section and its applications in life. If you want more information and a quotation, please contact us HERE.