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:What are the different types of steel coatings used for pipes?: There are several types of steel coatings used for pipes, including epoxy, polyethylene, polypropylene, and fusion bonded epoxy (FBE) coatings. Each of these coatings provides different levels of corrosion resistance and protection, making them suitable for various applications and environmental conditions.

Q:What are the different methods of joining steel pipes?: There are several different methods of joining steel pipes, including welding, threading, flanging, grooving, and using mechanical connectors.

Q:What are the common methods for inspecting the integrity of steel pipes?: Common methods for inspecting the integrity of steel pipes include visual inspection, ultrasonic testing, magnetic particle testing, radiographic testing, and pressure testing.

Q:What are steel pipes used for?: Steel pipes find extensive use in a diverse range of industries, serving various purposes. Among the most prevalent applications, steel pipes are commonly employed for the transportation of fluids and gases. In oil and gas pipelines, for instance, steel pipes are utilized to convey oil, natural gas, and other petroleum products across long distances. Additionally, steel pipes are utilized in domestic and industrial water supply systems. Within the construction industry, steel pipes play a pivotal role in structural tasks, offering exceptional strength and durability. Consequently, steel pipes are highly suitable for the construction of buildings, bridges, and other infrastructure projects. Due to their capacity to withstand heavy loads and provide stability, steel pipes are also employed in the construction of high-rise buildings. Moreover, the manufacturing industry heavily relies on steel pipes. These pipes are utilized in the production of machinery, equipment, and vehicles. In bulk handling systems, steel pipes are commonly employed to transport materials like coal, ore, and grain. Furthermore, steel pipes contribute to the manufacturing of automotive components such as exhaust systems, chassis, and suspension parts. In the energy sector, steel pipes serve a multitude of purposes. For instance, they are employed in power plants for the transportation of steam and hot water, as well as in the production and distribution of electricity. Additionally, steel pipes are utilized in the renewable energy sector, particularly in the construction of wind turbine towers and solar panel frameworks. In addition to these primary applications, steel pipes are also utilized in plumbing systems, irrigation systems, and the construction of fences and railings. Their versatility allows for customization, meeting specific requirements in terms of size, thickness, and coating. Ultimately, steel pipes fulfill an indispensable role across numerous industries, facilitating the transport of fluids, the construction of infrastructure, and the manufacturing of various products. Their strength, durability, and adaptability make them a preferred choice among engineers and professionals in various fields.

Q:What is the weight and strength of steel pipes?: Steel pipes can vary in weight and strength depending on their dimensions and the specific grade of steel used. The weight of steel pipes is typically measured in pounds per foot or kilograms per meter. The strength of steel pipes is commonly measured in terms of its yield strength and ultimate tensile strength. The weight of steel pipes can range from a few pounds per foot for smaller sizes to several hundred pounds per foot for larger diameters and thicker walls. The weight is influenced by factors such as the pipe's outer diameter, wall thickness, and length. For example, a 1-inch diameter steel pipe with a wall thickness of 0.125 inches may weigh around 0.67 pounds per foot, while a 12-inch diameter steel pipe with a wall thickness of 0.5 inches can weigh around 142 pounds per foot. The strength of steel pipes is determined by the grade of steel used, which can vary depending on the application and specific requirements. Common grades of steel used for pipes include ASTM A53 for general-purpose applications, ASTM A106 for high-temperature service, and API 5L for oil and gas transportation. These grades have different yield strengths and ultimate tensile strengths. Yield strength refers to the amount of stress a steel pipe can withstand before it begins to deform plastically. It is usually measured in pounds per square inch (psi) or megapascals (MPa). For example, ASTM A53 Grade B steel pipe has a minimum yield strength of 35,000 psi (240 MPa), while API 5L Grade X65 steel pipe has a minimum yield strength of 65,000 psi (448 MPa). Ultimate tensile strength, on the other hand, is the maximum stress a steel pipe can withstand before it fractures. It is also measured in psi or MPa. For instance, ASTM A106 Grade B steel pipe has an ultimate tensile strength of 60,000 psi (415 MPa), whereas API 5L Grade X65 steel pipe has an ultimate tensile strength of 77,000 psi (531 MPa). In summary, the weight and strength of steel pipes can vary depending on their dimensions and the grade of steel used. The weight is influenced by factors such as the pipe's diameter, wall thickness, and length, while the strength is determined by the steel's yield strength and ultimate tensile strength.

Q:How are steel pipes installed underground?: Steel pipes are installed underground through a process called trenching, where a trench is dug in the ground according to the desired pipe route. The trench is then prepared by removing any hindrances and ensuring a level base. The steel pipes are laid into the trench, with proper alignment and connections between sections. Once in place, the trench is backfilled with soil, compacted, and any necessary restoration work is done on the surface.

Q:How do you prevent corrosion in steel pipes?: One effective way to prevent corrosion in steel pipes is by applying a protective coating, such as paint or epoxy, to the surface of the pipes. This barrier creates a physical barrier between the pipe and the surrounding environment, preventing moisture and corrosive agents from coming into direct contact with the steel. Additionally, regular inspection and maintenance of the pipes, including cleaning and repairing any damaged coating, can help identify and address potential issues before they lead to corrosion.

Q:Can steel pipes be used for oil and gas well production?: Yes, steel pipes are commonly used for oil and gas well production due to their high strength, durability, and resistance to corrosion.

Q:How are steel pipes used in the construction of railways?: Steel pipes are used in the construction of railways for various purposes such as laying tracks, supporting structures, drainage systems, and carrying utilities like water and electrical cables. They provide strength, durability, and corrosion resistance, ensuring the smooth functioning and longevity of railway infrastructure.

Q:What are the different threading options for steel pipes?: The different threading options for steel pipes include tapered pipe threads (NPT/NPTF), straight pipe threads (NPS/NPSM), and mechanical threads (such as API threads). These threading options provide different levels of sealability, compatibility, and ease of installation, allowing for a variety of applications and connections.

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