Q195/Q215/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: Seamed steel pipe seamless steel pipe, carbon steel pipe, galvanized pipe, four how to distinguish between: Seamless steel tube processing technology:1.1 、 hot rolled seamless tubes are usually produced on automatic rolling mills. After checking and cleaning the surface defects, the solid tube is cut into the required length, centring on the end face of the tube blank, then sent to the heating furnace and punched on the piercer. At the same time, the hole rotates and advances continuously. Under the action of the roller and the plug, the inner cavity of the pipe blank is gradually formed, and the cavity is called the capillary. Sent to the automatic tube rolling mill on rolling. Finally, the thickness of the whole machine is the same, and the diameter of the sizing machine is determined to meet the specifications. It is an advanced method to produce seamless steel tube by continuous rolling mill.1.2, in order to obtain smaller size and better quality of seamless tube, cold rolling, cold drawing method must be used or combined. Cold rolling is usually carried out on a two roller mill, where the steel tube is rolled in the annular groove made of variable cross section, round hole groove and stationary conical head. Cold drawing is usually performed in single chain or double chain cold drawn machines from 0.5 to 100T.1.3, the extrusion method will soon heat the tube blank in the closed extrusion cylinder, the perforation bar and extrusion rod movement, so that extrusion parts from the smaller hole extrusion. This method can produce smaller diameter steel pipe.Seamless steel pipe use: mainly used to transport fluid pipeline or structural parts.The main use of steel pipe joints (steel) two welded together, so the price is cheap, widely used.

Q: How are steel pipes used in building foundations?: Steel pipes are often used in building foundations to provide structural support and stability. They can be driven into the ground to act as piles, which help transfer the weight of the building to the underlying soil or bedrock. Steel pipes can also be used for deep foundation systems such as drilled shafts or caissons, which are used in areas with weak or unstable soil conditions. Additionally, steel pipes can be utilized for underground drainage and utility systems within the foundation structure.

Q: How are steel pipes used in the manufacturing of chemical processing equipment?: Steel pipes are commonly used in the manufacturing of chemical processing equipment due to their durability, resistance to corrosion, and ability to handle high-pressure and high-temperature conditions. These pipes are used to transport various chemicals, gases, and liquids within the equipment, ensuring safe and efficient operations. They are also utilized for the distribution of heat transfer fluids, such as steam or hot water, to maintain optimal temperatures during chemical reactions.

Q: What is the impact of temperature on steel pipes?: The impact of temperature on steel pipes can vary depending on the specific conditions and application. Generally, high temperatures can cause steel pipes to expand, potentially leading to buckling or distortion. On the other hand, extremely low temperatures can make steel pipes more brittle and prone to cracking. It is crucial to consider the temperature range within which the steel pipes will operate to ensure their structural integrity and prevent any potential failures.

Q: What's the actual size of the DN25?: DN25 refers to the theoretical size of the inner hole of the pipe. That is to say, the theoretical dimension of the inner diameter of the pipe is 25 (the metric tube refers to the inner diameter, and the English tube is also to indicate the inner diameter, for example: 3/8, the inner diameter is 9.525, and the diameter of the 1/2 is 12.7, and the diameter of the 5/8 is 15.875). The outer diameter is theoretical in diameter, plus the wall thickness specified by the state (which is artificially specified and has no formula)The theoretical diameter of DN25 is 25, and the outer diameter is Phi 33.7 and phi 32(but there is also the outside diameter of the mark. The mark is: the outer diameter * wall thickness, such as: 32 * 2, that is to say, the outer diameter is 30, the inner diameter is 26)

Q: How are steel pipes protected against mechanical damage?: Steel pipes are protected against mechanical damage through various methods such as coating them with corrosion-resistant materials, covering them with protective sleeves or wraps, or installing them in underground or enclosed structures to prevent external impact.

Q: How are steel pipes used in railway infrastructure?: Steel pipes are used in railway infrastructure for a variety of purposes. They are primarily used for constructing and maintaining railway tracks, as they serve as the support structure for the rails. Steel pipes are also used for the fabrication of various components such as bridges, signal systems, and overhead power lines. Additionally, steel pipes are utilized in the construction of tunnels, culverts, and drainage systems to ensure proper water management along the railway lines.

Q: Can steel pipes be used for underground chemical injection?: Underground chemical injection can utilize steel pipes. These pipes are widely employed across industries due to their durability, strength, and resistance to corrosion. For underground chemical injection purposes, steel pipes bring various advantages. They can endure high pressure and temperature, making them suitable for the transportation and injection of chemicals into the ground. Furthermore, steel pipes exhibit superb chemical resistance, guaranteeing that they will not interact with the injected chemicals and compromise the system's integrity. Nevertheless, it is crucial to select the appropriate grade of steel pipe that is compatible with the specific chemicals being injected to ensure optimal performance and longevity. Regular maintenance and inspections are also necessary to identify any potential corrosion or damage to the pipes, thus ensuring the safe and efficient operation of the chemical injection system.

Q: Are steel pipes suitable for underground irrigation systems?: Yes, steel pipes are suitable for underground irrigation systems. They are durable, resistant to corrosion, and can withstand high pressure, making them a reliable choice for transporting water underground.

Q: How are steel pipes connected in pipeline construction?: Steel pipes are connected in pipeline construction through various methods, including welding, threading, and flanges. Welding involves joining the pipes by melting the edges and fusing them together, creating a strong and continuous connection. Threading involves screwing the pipes together using threaded ends, ensuring a secure connection. Flanges are used to connect pipes with the help of bolts, providing a detachable yet sturdy connection. These methods ensure the integrity and safety of the pipeline system.

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