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 average lifespan of steel pipes in different applications?: The lifespan of steel pipes in different applications can vary due to various factors, such as the quality of the steel, the environment in which they are used, and the maintenance and care they receive. Water supply lines typically have steel pipes that can last around 50 to 70 years on average. These pipes are often made of high-quality steel and experience less corrosive environments. However, the presence of corrosive substances, water chemistry, and soil conditions can significantly impact their lifespan. For industrial applications like oil and gas pipelines, steel pipes generally have a lifespan ranging from 20 to 50 years. These pipes are exposed to aggressive environments with high temperatures, pressure, and corrosive substances. Extending their lifespan can be achieved through regular inspections, maintenance, and corrosion protection measures. In construction applications, steel pipes used for structural purposes can last an average of 50 to 100 years or longer. These pipes are designed to withstand heavy loads and are often safeguarded by coatings or insulation to prevent corrosion. It's important to understand that these are average lifespans, and individual pipes may have shorter or longer lifespans depending on specific conditions. Ensuring the longevity of steel pipes in different applications can be achieved through regular inspections, maintenance, and timely repairs or replacements when necessary.

Q:Theoretical weight of 25*25*1.5 square steel tubes: Square steel tube, referred to as square tube, also known as square tube, is a square pipe of a kind of name, that is, the length of the same steel pipe. The strip is rolled by process. Generally, the strip is disassembled, leveled, crimped and welded to form a round tube. The tube is then rolled into square tubes and cut to the required length, usually 50 pieces per package.

Q:How are steel pipes used in the manufacturing of boilers and heat exchangers?: Steel pipes are used in the manufacturing of boilers and heat exchangers primarily for their excellent strength, durability, and heat resistance properties. These pipes are used to carry hot fluids and gases, such as water and steam, throughout the boiler or heat exchanger system. The steel pipes provide a reliable and efficient means of transferring heat and maintaining the desired temperature within the system. Additionally, their corrosion resistance ensures long-lasting performance, making them an essential component in the manufacturing of boilers and heat exchangers.

Q:How are steel tubes represented?: Galvanized pipe: InchSeamless steel tube, welded pipe, nonferrous metal pipe, etc.: outer diameter x wall thickness

Q:What are the different types of pipe fittings used with steel pipes?: There are several types of pipe fittings commonly used with steel pipes, including elbows, tees, reducers, couplings, unions, flanges, and valves.

Q:Can steel pipes be used for underground sprinkler systems?: Yes, steel pipes can be used for underground sprinkler systems. However, it is important to note that steel pipes are not as commonly used as other materials like PVC or polyethylene due to their susceptibility to corrosion. If steel pipes are chosen for this application, they should be coated or lined to protect them from underground moisture and ensure their longevity.

Q:What are the factors that affect the pressure rating of steel pipes?: The pressure rating of steel pipes can be influenced by various factors. These factors include the strength of the material used, the thickness of the pipe wall, the diameter of the pipe, the temperature at which it operates, its resistance to corrosion, compliance with manufacturing standards, and the impact of external loads. The strength of the steel plays a crucial role in determining the pressure rating. Steel with higher strength can handle higher pressure levels, while weaker grades may have lower ratings. Thicker walls provide more resistance against internal forces, allowing pipes to handle higher pressures. The diameter of the pipe also affects its pressure rating. Larger pipes generally have higher ratings due to their larger cross-sectional area. High temperatures can weaken steel, reducing its strength and pressure rating. Therefore, maximum operating temperature should be considered. Corrosion can weaken the pipe material over time, leading to a decrease in pressure rating. Factors such as fluid type, pH levels, and environmental conditions can impact corrosion resistance. Compliance with industry standards is crucial in determining pressure ratings. These standards ensure proper manufacturing techniques and materials are used. External loads such as soil settlement or traffic can affect pressure ratings. Proper design, installation, support, and protection are necessary to maintain the pressure rating. Considering all these factors and consulting industry guidelines is important for determining appropriate pressure ratings for steel pipes in different applications.

Q:How are steel pipes protected against external corrosion in coastal areas?: Steel pipes are protected against external corrosion in coastal areas through a combination of coating and cathodic protection measures. One of the most common methods used is the application of a protective coating on the surface of the steel pipe. This coating acts as a barrier between the steel surface and the corrosive elements present in the coastal environment, such as saltwater and humidity. The coating is typically made of materials like epoxy or polyethylene, which are resistant to corrosion and provide a long-lasting protective layer. In addition to coating, cathodic protection is also employed to further safeguard the steel pipes from corrosion. Cathodic protection involves the use of sacrificial anodes or impressed current to prevent the corrosion of the steel. Sacrificial anodes are made of more reactive metals, such as zinc or aluminum, which are attached to the steel pipe. These anodes corrode instead of the steel, sacrificing themselves to protect the steel surface. Impressed current systems, on the other hand, use an external power source to provide a protective current to the steel, preventing corrosion. Regular inspection and maintenance of the protective coating and cathodic protection system are crucial to ensure their effectiveness. Coatings may deteriorate over time due to wear and tear, requiring periodic inspection and reapplication if necessary. Similarly, sacrificial anodes need to be replaced when they are depleted, and impressed current systems require monitoring and adjustment to maintain the desired level of protection. Overall, by combining effective coating techniques with cathodic protection measures, steel pipes in coastal areas can be adequately protected against external corrosion, ensuring their longevity and optimal performance.

Q:What are the uses of seamless steel tubes?: A large number of pipes used for conveying fluids, such as pipelines for transporting petroleum, natural gas, gas, water, and certain solid materials.

Q:What is the maximum diameter of steel pipes?: The maximum diameter of steel pipes can vary depending on the specific manufacturing capabilities, but generally, it can range from a few inches to several feet.

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