Square Hollow Hot Rolled Steel Section

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Quick Details

Thickness:	1.0 - 35 mm	Section Shape:	Square	Outer Diameter:	2020-600600
Place of Origin:	Shandong China (Mainland)	Secondary Or Not:	Non-secondary	Application:	Structure Pipe
Technique:	Cold Rolled	Certification:	CE	Surface Treatment:	oil,paint
Special Pipe:	Thick Wall Pipe	Alloy Or Not:	Non-alloy	Name:	Square Hollow Steel Pipe/Tube
Shape:	Square/Rectangular	Yield Strength:	360-380Mpa	Tensile Strength:	560-580Mpa
Elongation:	24-28%	Bend Test:	Qualified	Impact Value:	V-notch
Grade:	20#,45#,16Mn,A210,St45,Q235,Q345,Q195,Q215,10#-45#,A53-A369,ST35-ST52,Q195-Q345	Standard:	JIS G3465-2006,JIS G3466,GB/T 3094

Specifications

1.OD:15X15-800X800MM,20X30--600X800MM
2.Thick.:1.0--35.0MM

Square Hollow Section Image

Square Hollow Hot Rolled Steel Section

FAQ of Square Hollow Section

①How is the quality of your products?
Our products are manufactured strictly according to national and internaional standard, and we take a test
on every pipe before delivered out. Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.

②How about price?
Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.

③Why should you chose us?
Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.

Any question, pls feel free to contact us !

Q:What is the difference between cast iron and steel pipes?: Cast iron pipes and steel pipes are commonly used in plumbing and construction, but they have distinct differences. Let's explore these disparities. 1. Composition: Cast iron pipes consist mainly of an iron alloy, with small amounts of carbon and other elements. Conversely, steel pipes are primarily composed of iron, but they also contain varying amounts of carbon and other alloying elements like manganese, chromium, and nickel. 2. Strength: Steel pipes generally surpass cast iron pipes in strength due to their higher carbon content and alloying elements. This makes steel pipes more suitable for high-pressure applications or areas with heavy loads. 3. Flexibility: Compared to cast iron pipes, steel pipes offer more flexibility, making installation and adjustment easier. Cast iron pipes, being brittle, are less flexible and more prone to cracking or breaking under excessive stress or impact. 4. Corrosion resistance: Steel pipes are usually more prone to corrosion than cast iron pipes. However, this can be mitigated with various protective coatings or treatments applied to the steel pipes. Cast iron pipes, on the other hand, possess inherent corrosion resistance due to the formation of a protective layer of rust on their surface. 5. Noise insulation: Cast iron pipes excel in noise insulation due to their dense and heavy composition. This makes them ideal for reducing noise in residential plumbing systems. Steel pipes, being lighter and less dense, do not offer the same level of noise insulation. 6. Longevity: When properly maintained, cast iron pipes have a lifespan of over 100 years. Steel pipes, while still durable, may have a shorter lifespan depending on factors like the quality of the steel used, environmental conditions, and maintenance practices. In conclusion, the primary differences between cast iron and steel pipes lie in their composition, strength, flexibility, corrosion resistance, noise insulation, and longevity. The choice between the two depends on specific requirements, such as desired strength, durability, and noise reduction properties.

Q:What are the different methods of insulation for steel pipes?: There are several methods of insulation for steel pipes, including thermal insulation, such as fiberglass or mineral wool wraps, foam insulation, such as polyurethane or polyethylene foam, and reflective insulation, like foil-faced insulation. Each method has its own advantages and is chosen based on factors such as the intended use, temperature range, and desired level of insulation.

Q:Can steel pipes be used for wastewater treatment?: Yes, steel pipes can be used for wastewater treatment. Steel pipes are commonly used in various stages of wastewater treatment processes, such as conveyance, distribution, and collection systems. They are durable, corrosion-resistant, and can withstand high-pressure conditions, making them suitable for transporting wastewater efficiently and safely. Additionally, steel pipes can be coated or lined to enhance their resistance to corrosion and improve their performance in harsh wastewater environments.

Q:Can steel pipes be used for steam applications?: Yes, steel pipes can be used for steam applications. Steel pipes have high strength and durability, making them suitable for carrying high-pressure steam. They can withstand the high temperatures and pressures associated with steam, making them a reliable choice for steam transportation in various industries.

Q:How are steel pipes protected against microbial corrosion?: Steel pipes are protected against microbial corrosion through various methods. One common method is the use of coatings on the pipe's surface. These coatings act as a barrier between the steel and the surrounding environment, preventing the entry of microbes and their corrosive byproducts. Coatings such as epoxy, polyethylene, and fusion bonded epoxy are often applied to the pipes to provide this protection. Another method is the use of corrosion inhibitors. These inhibitors are added to the fluid flowing through the pipe to inhibit microbial growth and prevent corrosion. These inhibitors can be organic or inorganic compounds that work by either killing the microbes or inhibiting their metabolic activity. Additionally, proper maintenance and cleaning of the pipes are crucial in preventing microbial corrosion. Regular inspections and cleaning can help remove any biofilms or microbial deposits that may have formed on the pipe's surface. This reduces the potential for microbial corrosion and extends the lifespan of the pipes. In some cases, cathodic protection may also be employed. This involves the use of sacrificial anodes or impressed current systems to provide a protective electrical current to the pipe. This current helps to prevent the formation of corrosive microorganisms and protects the steel from corrosion. Overall, a combination of coatings, corrosion inhibitors, regular maintenance, and cathodic protection techniques are used to protect steel pipes against microbial corrosion. These strategies help to ensure the longevity and integrity of the pipes in various industries, such as oil and gas, water supply, and sewage systems.

Q:What is the difference between Schedule 40 and Schedule 80 steel pipes?: The main difference between Schedule 40 and Schedule 80 steel pipes lies in their wall thickness. Schedule 40 pipes have a thinner wall, making them suitable for low-pressure applications, while Schedule 80 pipes have a thicker wall, enabling them to withstand higher pressure.

Q:What are the different methods of pipe protection for steel pipes?: There are several different methods of pipe protection for steel pipes, each serving a unique purpose and providing varying levels of protection. Some of the common methods include: 1. Coatings: Coatings are applied on the external surface of steel pipes to protect them from corrosion and other environmental factors. Coating materials can include various types of paints, epoxies, or polymers. These coatings create a barrier between the pipe surface and the surrounding environment, preventing the steel from coming into contact with corrosive elements. 2. Wrapping: Wrapping involves using a protective material, such as tape or shrink wrap, to cover the steel pipe. This method provides a physical barrier against moisture, chemicals, and other corrosive substances. Wrapping is often used in combination with coatings to enhance the overall protection. 3. Cathodic Protection: Cathodic protection is an electrochemical method used to protect steel pipes from corrosion. It involves connecting the steel pipe to a sacrificial anode, typically made of zinc or magnesium. The anode corrodes instead of the pipe, which helps to prevent the steel from deteriorating. This method is commonly used for buried or submerged pipelines. 4. Thermal Insulation: Thermal insulation is used to protect steel pipes from extreme temperatures. Insulating materials, such as foam or mineral wool, are applied around the pipe to minimize heat transfer. This method is particularly important for pipes carrying hot fluids or exposed to extreme weather conditions. 5. Vibration Dampening: Vibration can cause stress and fatigue on steel pipes, leading to potential damage. To protect against vibrations, various techniques can be employed, such as using vibration damping pads or installing supports and clamps. These methods help to absorb and dissipate the energy generated by vibrations, reducing the risk of pipe failure. 6. Concrete Coating: For pipelines installed underwater or in highly corrosive environments, concrete coating is often used. A layer of concrete or a cement-based mortar is applied to the steel pipe, providing both mechanical protection and resistance to corrosion. It is important to select the appropriate method of pipe protection based on the specific application, environmental conditions, and desired level of protection. Regular inspection and maintenance are also crucial to ensure the long-term integrity of steel pipes.

Q:How are steel pipes used in seaport infrastructure?: Steel pipes are commonly used in seaport infrastructure for various purposes such as constructing piers, docks, and wharves. They are also used in the construction of offshore platforms and maritime structures like breakwaters and jetties. Steel pipes provide the necessary strength and durability to withstand the harsh marine environment and are used for the transportation of water, fuel, and other fluids within the port. Additionally, they are employed in the construction of pipelines for the loading and unloading of cargo ships, as well as for dredging and marine construction activities.

Q:The difference between 12Cr1MoVG alloy steel tube and 15CrMo: 15CrMo is a steel Pearlite Heat-resistant steel, has high heat resistance at high temperature (b = 440MPa) and antioxidant activity, and has certain ability of anti hydrogen corrosion. Because of the high content of Cr, C and other alloy elements in steel, the tendency of hardening of steel is obvious, and the weldability is poor.

Q:How are steel pipes protected against ultraviolet (UV) radiation?: Steel pipes are typically protected against ultraviolet (UV) radiation through the application of specialized coatings or paints that act as a barrier, preventing direct exposure of the steel to UV rays. These coatings are designed to withstand UV degradation, prevent corrosion, and extend the lifespan of the pipes.

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