ASTM A500/JIS/EN 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:What's the use of steel pipe?: (processing workshop of Tianjin steel pipe company as a result of the steel pipe truss structure, the actual steel saving up to 42.9%), with a steel pipe manufacturing highway bridge can not only save steel, simplify the construction, but also can greatly reduce the coated area, saving investment and maintenance costs.

Q:Can steel pipes be used for water treatment plants?: Yes, steel pipes can be and are commonly used in water treatment plants. Steel pipes have several advantages such as high strength, durability, and resistance to corrosion, making them suitable for conveying and transporting water in water treatment processes.

Q:What are the common problems or issues faced with steel pipes?: Common problems or issues faced with steel pipes include corrosion, rusting, leaks, cracks, and blockages. Corrosion can occur due to exposure to moisture or chemicals, leading to a decrease in pipe integrity and potential leaks. Rusting is another common problem, especially in outdoor or wet environments, which can weaken the pipe and cause structural issues. Leaks can result from pipe corrosion or cracks, leading to water damage and potential pipe failure. Blockages can occur due to debris, scale buildup, or pipe collapse, restricting the flow of fluid or causing complete pipe blockage. Regular maintenance and inspections are necessary to identify and address these issues promptly.

Q:How do you calculate the buoyancy of submerged steel pipes?: To calculate the buoyancy of submerged steel pipes, you need to consider the principle of Archimedes' buoyancy. This principle states that the buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. To calculate the buoyant force, you need to determine the volume of the fluid displaced by the submerged steel pipe. The volume can be calculated by multiplying the cross-sectional area of the pipe by the length of the submerged portion. Next, you need to determine the density of the fluid in which the steel pipe is submerged. This can be obtained from the fluid's properties or by referring to known values. Once you have the volume and density of the fluid, you can determine the weight of the fluid displaced by the submerged pipe using the equation: weight = volume × density × acceleration due to gravity. Finally, the buoyant force can be calculated by multiplying the weight of the displaced fluid by the acceleration due to gravity. This will give you the upward force exerted on the submerged steel pipe by the fluid. It is important to note that in order to accurately calculate the buoyancy of submerged steel pipes, you should also consider any additional factors such as the weight of the pipe itself, any attached equipment or coatings, and the specific conditions of the fluid in which it is submerged.

Q:How are steel pipes protected against external damage?: Steel pipes are protected against external damage through various methods such as anti-corrosion coatings, insulation materials, and cathodic protection systems. These measures help prevent corrosion, impact, and abrasion, ensuring the durability and longevity of the pipes.

Q:Can steel pipes be used for the construction of offshore platforms?: Yes, steel pipes can be used for the construction of offshore platforms. Steel pipes are commonly used in offshore construction due to their high strength, durability, and resistance to corrosion in harsh marine environments. They are suitable for various applications, including the fabrication of jacket legs, risers, pile sleeves, and other structural components necessary for offshore platform construction.

Q:What is the maximum bending radius for steel pipes?: The maximum bending radius for steel pipes typically depends on the specific grade and diameter of the pipe, but generally, it ranges from three to five times the pipe's outer diameter.

Q:What is the difference between internal threading and external threading of steel pipes?: Steel pipes can be threaded using two different methods: internal threading and external threading. The difference between these methods lies in where the threads are created. Internal threading involves cutting threads on the inside surface of the steel pipe. To do this, a tool or die is used to remove material from the inner diameter of the pipe, resulting in a helical groove. These threads are useful for connecting the pipe to other components, such as fittings or valves. On the other hand, external threading involves cutting threads on the outside surface of the steel pipe. This process requires the use of a threading die or a lathe to remove material from the outer diameter, leaving a helical groove. These external threads allow the pipe to be connected to other components or fittings with corresponding internal threads. The choice between internal and external threading depends on the specific application and project requirements. Internal threading is often preferred when the pipe needs to be connected to components with external threads, like fittings or valves. External threading, on the other hand, is typically used when the pipe needs to be connected to components with internal threads, or when it needs to be screwed into a threaded hole or coupling. In conclusion, the primary difference between internal and external threading of steel pipes is the location of the threads – internal threads are cut on the inside surface, while external threads are cut on the outside surface. The choice between these methods depends on the specific application and the type of connections needed.

Q:Can steel pipes be used for conveying oil?: Yes, steel pipes are commonly used for conveying oil due to their durability, strength, and resistance to corrosion. They are able to withstand high pressure and temperature conditions, making them ideal for transporting oil over long distances.

Q:What are the different methods of threading steel pipes?: There are several methods for threading steel pipes, including manual threading using a handheld pipe threader, mechanical threading using a powered threading machine, and hydraulic threading using a hydraulic pipe threader. Additionally, some steel pipes can also be threaded using a die head or a threading lathe.

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