Galvanized 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 do steel pipes compare to other materials like PVC or copper pipes?: Steel pipes are known for their durability and strength, making them highly preferable for applications that require high pressure and extreme temperatures. In comparison to PVC pipes, steel pipes offer superior resistance to impact, corrosion, and fire, making them suitable for harsh environments. Copper pipes, on the other hand, are primarily used for plumbing and heating systems due to their excellent heat conductivity. While steel pipes may be more expensive than PVC or copper, their robustness and longevity make them a reliable choice for various industrial and infrastructure projects.

Q: What's the difference between round and round tubes?: Round steel is a medium solid steel, of course the tube is hollow

Q: What are the different sizes of threads available for steel pipes?: The different sizes of threads available for steel pipes vary depending on the specific requirements and standards. Common thread sizes for steel pipes include 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4", 5", 6", 8", 10", and 12". However, these sizes may vary based on the specific industry, country, and application.

Q: How do you clean and maintain steel pipes?: To clean and maintain steel pipes, start by removing any loose dirt or debris using a brush or cloth. Then, use a mild detergent or soap solution to wash the pipes thoroughly. Rinse them with clean water and dry them with a soft cloth to prevent water spots. To maintain them, regularly inspect for signs of corrosion or rust and address any issues promptly. Additionally, apply a protective coating or paint to prevent future rusting.

Q: Can steel pipes be used for chimney flues?: Yes, steel pipes can be used for chimney flues. Steel pipes are commonly used for chimney flues due to their durability, heat resistance, and ability to withstand high temperatures. They provide a reliable and efficient solution for venting smoke and gases from a fireplace or stove.

Q: What are the common methods for inspecting the condition of steel pipes?: Steel pipes can be inspected using a variety of methods to ensure their condition and integrity. These methods aim to identify any issues or defects that could potentially affect the pipes. 1. Visual Inspection: Inspectors thoroughly examine the pipes visually to spot any visible signs of damage such as corrosion, cracks, or leaks. They may employ tools like flashlights, mirrors, or borescopes to reach difficult areas. 2. Ultrasonic Testing: This method utilizes high-frequency sound waves to detect defects within the steel pipes. A transducer emits sound waves, and disruptions or reflections in these waves can indicate potential issues like cracks or thinning of the pipe walls. 3. Magnetic Particle Testing: Primarily used to detect surface cracks or defects, this technique applies a magnetic field to the pipe. Fine iron particles are then applied to the surface, and they accumulate at areas with surface defects, making them clearly visible. 4. Eddy Current Testing: This non-destructive testing method detects surface and near-surface defects in steel pipes. It involves passing an alternating current through a coil, inducing eddy currents in the pipe. Disruptions or changes in these eddy currents can indicate defects like corrosion or cracks. 5. Radiographic Testing: X-rays or gamma rays are used in this method to inspect the internal structure of steel pipes. X-ray film or a digital detector is placed on one side of the pipe, while the X-ray source is positioned on the other side. The rays penetrate the steel, and any irregularities or defects can be identified on the film or through digital imaging. 6. Dye Penetrant Inspection: This technique is employed to detect surface-breaking defects in steel pipes. A dye penetrant is applied to the pipe's surface, and after a specified time, a developer is used to draw out the dye from any defects, making them easily visible. Whether used individually or in combination, these methods provide a comprehensive inspection of steel pipes, ensuring their reliability and safety in industries like oil and gas, construction, and manufacturing.

Q: Are steel pipes suitable for industrial applications?: Yes, steel pipes are highly suitable for industrial applications. Steel pipes offer several advantages that make them the preferred choice for various industries. Firstly, steel pipes have excellent strength and durability, making them capable of withstanding high pressure and heavy loads. This makes them ideal for applications involving transportation of liquids, gases, and solids. Additionally, steel pipes have a high resistance to corrosion, which is crucial in industrial environments where exposure to harsh chemicals, moisture, and extreme temperatures is common. The corrosion-resistant properties of steel pipes ensure a longer lifespan and reduce the need for frequent maintenance and replacements. Moreover, steel pipes have a smooth interior surface, which minimizes friction and allows for efficient flow of materials. This is especially important for industries such as oil and gas, where the smooth flow of fluids is essential for proper operations. Furthermore, steel pipes are available in a wide range of sizes and thicknesses, allowing for customization and flexibility in design. They can be easily welded and connected, enabling easy installation and modification as per the specific requirements of industrial applications. Overall, steel pipes offer a combination of strength, durability, corrosion resistance, and versatility, making them highly suitable and widely used in various industrial applications such as oil and gas, construction, water treatment, power generation, and chemical processing.

Q: Is the steel frame on each floor supporting formwork (floor) called full scaffolding?: Full house scaffold is mainly used in the decoration construction of the single storey workshop, exhibition hall, gymnasium and so on. It consists of vertical pole, cross bar, diagonal brace and scissors support

Q: How are steel pipes used in the manufacturing of desalination plants?: Steel pipes are used in the manufacturing of desalination plants to transport the seawater from the intake point to the treatment facilities. These pipes are durable, corrosion-resistant, and can withstand the high-pressure conditions required for the desalination process.

Q: How do you calculate the pipe friction loss coefficient for steel pipes?: To calculate the pipe friction loss coefficient for steel pipes, you need to consider several factors. One of the most common methods used is the Darcy-Weisbach equation, which relates the frictional head loss in a pipe to the flow rate, pipe diameter, pipe length, fluid properties, and the pipe roughness coefficient. The Darcy-Weisbach equation is expressed as: hf = (f * L * V^2) / (2 * g * D) Where: hf is the head loss due to friction, f is the pipe friction factor, L is the pipe length, V is the fluid velocity, g is the acceleration due to gravity, and D is the pipe diameter. The pipe friction factor, f, is the key parameter that needs to be determined. For steel pipes, this factor depends on the pipe roughness coefficient, which represents the relative roughness of the pipe. The relative roughness is calculated by dividing the absolute roughness of the pipe surface by the pipe diameter. The pipe roughness coefficient can be obtained from various sources, such as manufacturer specifications, engineering handbooks, or experimental data. It is important to ensure that the roughness coefficient used matches the specific type and condition of the steel pipe being analyzed. Once you have the pipe roughness coefficient, you can use it to calculate the pipe friction factor using empirical correlations or charts. These correlations often involve Reynolds number, which is a dimensionless quantity that characterizes the flow regime. By substituting the obtained pipe friction factor into the Darcy-Weisbach equation, you can calculate the head loss due to friction for steel pipes. This value is essential in designing piping systems, determining pump requirements, or estimating energy consumption in fluid flow applications.

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