Q195/Q235/Q345 Rectangular hollow section/ RHS

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 10 m.t.

Supply Capability:: 5000 m.t./month

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Product Name	rectangular hollow section/ RHS
Size	Size:	1010--500500mm
	Thickness:	0.45--16mm
	Length:	3-12m
Steel Grade	Q195,Q215,Q235,Q345,16Mn, 20#
Standard	ASTM A500,EN10219,GB/T6728,GB/T6725,JIS G3466
Usage	1. For Structure, Airport, Railway 2. Construction and so on.
Ends	Plain end or By Your Choice
Surface	Bared Or With Oiled Or Galvanized
Technique	ERW ,Hot Rolled and Cold Rolled
Section Shape	Rectangular
Inspection	With Hydraulic Testing, Eddy Current , Infrared Test
Package	Bags, Bundle, In Bulk, Containers
MOQ	20 Metric Ton / Can Be Negotiated
Supply Ability	15,000 Metric Ton/Month
Date of Delivery	7 days(Qty within 1000 Metric Ton) or According To The Quantity
Port of Shipment	Tianjin, China
Payment	L/C T/T

Q: How are steel pipes threaded for connection?: Steel pipes are threaded for connection using a threading machine or a die. The pipe is clamped securely into the machine, and a rotating die is then used to cut threads into the pipe's surface. This process creates the necessary grooves and ridges that allow the pipes to be securely connected together.

Q: What are the different methods of pipe protection for steel pipes?: There are several methods of pipe protection for steel pipes. These include corrosion-resistant coatings such as epoxy or polyethylene, cathodic protection systems, which use sacrificial anodes or impressed current to prevent corrosion, wrapping the pipes with protective tape or shrink sleeves, and using corrosion inhibitors to prevent the formation of rust. Additionally, proper installation practices, regular inspections, and maintenance can also contribute to pipe protection.

Q: What are the different end finishes available for steel pipes?: Steel pipes have various end finishes available, depending on the specific application and requirements. Some common options include: 1. Plain End: The simplest and most common type, where the pipe ends are cut square without any additional treatment or threading. 2. Beveled End: This involves an angled cut at the end of the pipe, typically at a 30-degree angle. It facilitates better welding and ensures a seamless transition between pipes. 3. Threaded End: These ends are useful for connecting pipes with other components using threaded fittings. The pipe ends are cut with external threads, allowing for easy assembly and disassembly. 4. Coupling End: Similar to threaded ends, coupling ends have internal threads. This enables pipes to be connected using couplings or connectors. 5. Grooved End: This type is commonly used in fire protection systems or other applications that require quick and easy installation. The pipe ends are grooved, and a coupling is used to connect and secure the pipes. 6. Flanged End: Flanged ends have a flat, wide surface with holes for bolts. They are used when the pipe needs to be connected to other components using flanges, such as in piping systems or equipment connections. Each of these end finishes serves a specific purpose and is chosen based on the application's requirements. The selection depends on factors like the desired type of connection, intended use of the pipe, and the applicable industry standards and regulations.

Q: What is the creep resistance of steel pipes?: The creep resistance of steel pipes refers to their ability to withstand deformation or elongation over time when subjected to high temperatures and constant stress. Steel pipes are known for their excellent creep resistance due to the inherent strength and stability of the material. The specific creep resistance of steel pipes can vary depending on factors such as the alloy composition, heat treatment, and the operating conditions they are exposed to. Creep is a phenomenon that occurs at elevated temperatures where materials slowly deform under constant stress. In the case of steel pipes, this can be a concern in applications where they are exposed to high temperatures for prolonged periods, such as in power plants, industrial furnaces, or steam pipelines. The resistance to creep deformation is crucial to ensure the structural integrity and longevity of the pipes. Steel pipes are often designed and manufactured with alloys that have high creep resistance properties, such as chromium-molybdenum (Cr-Mo) steels or nickel-based alloys. These alloys exhibit excellent mechanical strength, good thermal stability, and resistance to oxidation and corrosion, all of which contribute to their superior creep resistance. Furthermore, heat treatment processes like quenching and tempering can significantly enhance the creep resistance of steel pipes. These treatments involve controlled heating and cooling cycles that optimize the microstructure of the steel, increasing its resistance to deformation and improving its overall performance at high temperatures. It is important to note that the creep resistance of steel pipes is typically specified by industry standards and codes, such as the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code. These standards define the allowable stress levels and design criteria for various steel pipe applications, ensuring that they meet the required safety and performance standards. In summary, steel pipes are known for their excellent creep resistance due to their inherent strength, stability, and resistance to high temperatures. The specific creep resistance of steel pipes can vary depending on factors such as alloy composition, heat treatment, and operating conditions. Proper design and adherence to industry standards are crucial to ensuring the desired creep resistance and overall performance of steel pipes in various applications.

Q: Can steel pipes be used for conveying slurries or abrasive materials?: Yes, steel pipes can be used for conveying slurries or abrasive materials. Steel pipes are known for their strength and durability, making them suitable for handling heavy-duty applications. They are resistant to wear, corrosion, and impact, which makes them ideal for conveying abrasive materials or slurries that contain solids or particles. Additionally, steel pipes can withstand high pressure and maintain their structural integrity, ensuring the safe and efficient transportation of slurries or abrasive materials.

Q: How do you calculate the maximum allowable deflection for steel pipes?: The maximum allowable deflection for steel pipes can be calculated using various formulas and guidelines set by industry standards. Factors such as the material properties of the steel, pipe diameter, wall thickness, and the applied load are taken into consideration. These calculations typically involve using equations that relate to the pipe's moment of inertia, modulus of elasticity, and the specific loading conditions. It is recommended to consult relevant engineering codes and standards, such as ASME B31.1 or ASME B31.3, to ensure accurate calculations and safe design.

Q: Can steel pipes be used for piling?: Yes, steel pipes can be used for piling. Steel pipes are commonly used in piling applications due to their strength, durability, and versatility. They are able to withstand the load and pressure of the soil and provide a stable foundation for structures. Steel pipes used for piling are typically driven into the ground using specialized equipment, ensuring they are securely positioned. Additionally, steel pipes can be easily cut and welded to the required length, making them suitable for various piling projects.

Q: How are steel pipes used in oil refineries?: Steel pipes are used extensively in oil refineries for various purposes, such as transporting crude oil, petroleum products, and chemicals throughout the facility. They are also used in the construction of equipment, such as distillation columns and heat exchangers, where they provide a reliable and durable means of transferring fluids and withstanding high temperatures and pressures.

Q: Are steel pipes resistant to UV degradation?: No, steel pipes are not resistant to UV degradation.

Q: How are steel pipes used in the manufacturing of pharmaceutical equipment?: Steel pipes are commonly used in the manufacturing of pharmaceutical equipment for various purposes such as transferring fluids, gases, and chemicals, as well as providing structural support to the equipment. These pipes are known for their durability, corrosion resistance, and ability to withstand high pressure, making them ideal for ensuring the safe and efficient operation of pharmaceutical machinery.

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