Galvanized Rectangular hollow section 20#

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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 are the common protective coatings used on the inner surface of steel pipes?: The common protective coatings used on the inner surface of steel pipes include epoxy, polyurethane, and cement mortar coatings. These coatings provide corrosion resistance, prevent the formation of scales, and improve the durability and lifespan of the pipes.

Q:What is the difference between steel pipes and PEX pipes?: Steel pipes are made from steel, a durable and strong material, while PEX pipes are made from cross-linked polyethylene, a flexible and lightweight material. Steel pipes are typically used for high-pressure applications, such as plumbing systems in commercial buildings, while PEX pipes are commonly used in residential plumbing due to their ease of installation, resistance to freezing and bursting, and lower cost. Additionally, steel pipes require threading and soldering for connections, while PEX pipes use push-fit or crimp fittings, making them easier to work with.

Q:What is the difference between steel pipes and fiberglass-reinforced pipes?: Steel pipes are made from a durable and strong material known as steel, which provides high strength and resistance to corrosion. On the other hand, fiberglass-reinforced pipes are made from a combination of fiberglass and resin, offering a lightweight and corrosion-resistant alternative. While steel pipes are commonly used for heavy-duty applications such as oil and gas pipelines, fiberglass-reinforced pipes are often preferred for applications that require resistance to chemicals and high temperatures, like in the chemical industry. Additionally, fiberglass-reinforced pipes have the advantage of being non-conductive, making them suitable for certain electrical applications.

Q:What are the different types of steel pipe elbows?: There are various industries and applications that commonly utilize different types of steel pipe elbows. These types encompass: 1. 90-degree elbows: Employed when redirecting fluid or gas flow requires a sharp 90-degree bend. They find extensive use in plumbing, construction, and industrial piping systems. 2. 45-degree elbows: Similar to 90-degree elbows, these elbows alter flow direction, but with a smaller angle. They are suitable for situations requiring a more gradual change in flow direction. 3. Long radius elbows: Differing from standard elbows, long radius elbows possess a larger curvature radius. This design minimizes fluid friction and pressure drop, making them ideal for applications necessitating smoother flow, such as high-flow systems or those involving viscous fluids. 4. Short radius elbows: In contrast, short radius elbows feature a smaller curvature radius. They are generally utilized in confined spaces where a compact design is essential, although they may lead to increased fluid friction and higher pressure drops. 5. Reducing elbows: These elbows are ideal for connecting pipes of varying diameters. With one end having a larger diameter and the other end with a smaller diameter, they enable a seamless transition between two pipes of different sizes. 6. Mitered elbows: Mitered elbows are tailor-made elbows fabricated by cutting and welding multiple pipe sections at specific angles. They are frequently employed when standard elbows cannot accommodate the required angle or when a unique design is necessary. In conclusion, the selection of the appropriate type of steel pipe elbow depends on factors such as the specific application, fluid flow requirements, space limitations, and compatibility with the piping system.

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:Can steel pipes be used for telecommunications cables?: No, steel pipes cannot be used for telecommunications cables. Telecommunications cables typically require materials with high electrical conductivity and insulation properties, such as copper or fiber optics. Steel pipes are not suitable for transmitting signals and would interfere with the transmission of data.

Q:What are the applications of steel pipes in the automotive industry?: Steel pipes are widely used in the automotive industry for various applications such as exhaust systems, fuel lines, and structural components. These pipes provide durability, high strength, and resistance to corrosion, making them ideal for withstanding the harsh conditions and requirements of automotive applications. Additionally, steel pipes are lightweight, cost-effective, and offer excellent formability, enabling efficient manufacturing and design flexibility for automotive manufacturers.

Q:Can steel pipes be used for sewage systems?: Yes, steel pipes can be used for sewage systems. Steel pipes are commonly used in sewage systems for their durability, strength, and resistance to corrosion. They are suitable for transporting sewage and wastewater, ensuring reliable and long-lasting performance.

Q:How do you prevent steel pipes from rusting?: Various measures can be taken to prevent the rusting of steel pipes. One effective method is the application of a protective coating on the surface of the pipes. Different types of coatings, such as paint, epoxy, or zinc, can be used for this purpose. These coatings act as a barrier between the steel and the corrosive environment, thereby preventing direct contact between moisture, oxygen, and the metal, which can lead to rust formation. Another approach involves the use of corrosion inhibitors. These substances are added to the water or fluid flowing through the pipes, creating a protective film on the surface of the steel. This film acts as a shield, inhibiting the corrosion process and preventing the formation of rust. Regular maintenance plays a crucial role in preventing rust on steel pipes. It is essential to inspect the pipes regularly for any signs of damage or corrosion and promptly repair or replace any compromised areas. Additionally, keeping the pipes clean and dry by removing accumulated dirt or moisture helps prevent the formation of rust. In some cases, using stainless steel pipes instead of regular steel can be beneficial. Stainless steel contains chromium, which forms a passive oxide layer on the metal's surface. This layer acts as a natural barrier against corrosion, making stainless steel pipes highly resistant to rust. Finally, controlling the installation environment of the pipes can also help prevent rust. This can be achieved by maintaining proper ventilation, controlling humidity levels, and avoiding exposure to harsh chemicals or corrosive substances. By implementing these preventive measures, the lifespan and integrity of steel pipes can be significantly extended, while minimizing the risk of rust formation.

Q:What is the maximum allowable deflection for steel pipes?: The maximum allowable deflection for steel pipes is typically determined by industry standards and design codes. These standards and codes specify the acceptable limits of deflection to ensure the structural integrity and functionality of the pipes. The maximum allowable deflection varies depending on various factors such as the pipe diameter, wall thickness, material properties, and the type of application. It is important to consult the relevant standards and codes, such as the American Society of Mechanical Engineers (ASME) B31.3 code for process piping or the American Water Works Association (AWWA) standards for water transmission and distribution pipes, to determine the specific maximum allowable deflection for a particular steel pipe application. Following these guidelines helps to ensure the safe and efficient operation of steel pipes in various industries and applications.

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