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: How do you inspect steel pipes for defects?: Inspecting steel pipes for defects involves a systematic approach that combines visual inspection, non-destructive testing (NDT) techniques, and specialized equipment. Here are the steps typically followed to inspect steel pipes for defects: 1. Visual Inspection: Start by visually examining the external surface of the pipe, looking for any visible signs of defects such as cracks, dents, or corrosion. Pay close attention to welds, joints, and areas susceptible to stress or damage. 2. Ultrasonic Testing (UT): Ultrasonic testing is commonly used to detect internal defects in steel pipes. It involves using ultrasonic waves that are sent into the pipe and then interpreted based on the echoes received. Any irregularities in the internal structure, like cracks or voids, can be identified and analyzed. 3. Magnetic Particle Inspection (MPI): MPI is a widely used technique to detect surface and near-surface defects such as cracks, seams, or other discontinuities. This method involves applying a magnetic field to the pipe and then applying ferromagnetic particles (usually iron-based) on the surface. These particles will accumulate and form visible indications at the areas of magnetic flux leakage caused by defects. 4. Eddy Current Testing (ECT): Eddy current testing is suitable for detecting surface and near-surface defects in conductive materials like steel. It involves inducing an alternating current into the pipe and monitoring the changes in the electrical currents induced by any defects present. These changes are then analyzed to identify and evaluate the defects. 5. Radiographic Testing (RT): Radiographic testing is performed by exposing the steel pipe to X-rays or gamma rays and capturing the resulting radiographic images. This technique allows for the detection of internal defects such as cracks, porosity, inclusions, or wall thickness variations. The radiographic images are then examined for any indications of defects. 6. Dye Penetrant Inspection (DPI): DPI is a method used to detect surface-breaking defects in steel pipes. It involves applying a liquid dye on the surface, which penetrates into any surface cracks or flaws. After allowing the dye to seep in and adequately react, excess dye is removed, and a developer is applied to draw out the dye from the defects, making them visible. 7. Pressure Testing: Pressure testing involves pressurizing the steel pipe to a predetermined level and monitoring for any pressure drops or leaks. This test ensures that the pipe can withstand the required pressure without any structural defects. It is important to note that the inspection technique used depends on various factors, such as the type of defect being sought, the size and nature of the pipe, and the specific industry standards and regulations. Inspection professionals with expertise in NDT methods and equipment are typically employed to ensure accurate and reliable results.

Q: How do steel pipes handle ground settlement?: Steel pipes are known for their strength and durability, making them capable of handling ground settlement effectively. Due to their rigid nature, steel pipes are resistant to deformation or collapse caused by uneven settling of the ground. This makes them a reliable choice for underground installations, as they can withstand and navigate through the changes in the ground surface without compromising their structural integrity.

Q: What is the difference between seamless and ERW steel pipes?: Seamless steel pipes are made without any welded joints, resulting in a uniform and continuous structure. On the other hand, ERW (Electric Resistance Welded) steel pipes are created by welding the edges of the steel strip or coil together, forming a seam. This seam may be visible on the surface of the pipe. While seamless pipes are considered stronger and more reliable due to their uniform structure, ERW pipes are more cost-effective and commonly used for low to medium pressure applications.

Q: What is the weight of steel pipes?: The weight of steel pipes can vary depending on their size, length, and thickness. However, on average, steel pipes typically weigh between 1.1 to 1.4 pounds per foot.

Q: What are the advantages of using steel pipes in the manufacturing industry?: There are several advantages of using steel pipes in the manufacturing industry. Firstly, steel pipes are known for their high strength and durability, making them ideal for carrying heavy loads and withstanding harsh conditions. Secondly, steel pipes have excellent resistance to corrosion, reducing the risk of leaks and ensuring a longer lifespan. Additionally, steel pipes offer a wide range of sizes and shapes, allowing for flexibility in design and easy customization. Furthermore, steel pipes are cost-effective compared to other materials, as they require minimal maintenance and have a low risk of failure. Lastly, steel pipes are environmentally friendly, as they are fully recyclable and contribute to reducing carbon emissions during manufacturing. Overall, the advantages of using steel pipes in the manufacturing industry make them a reliable and efficient choice for various applications.

Q: What's the difference between hot-rolled seamless steel tube and cold-rolled seamless steel tube?: The difference between hot rolled seamless steel tube and cold rolled seamless steel tube:1) cold-rolled seamless tubes tend to be of small diameter, and hot-rolled seamless tubes are often of large diameter.2) the accuracy of cold-rolled seamless steel tube is higher than that of hot-rolled seamless steel tube, and the price is higher than that of hot-rolled seamless steel tube.

Q: What are the environmental impacts of using steel pipes?: The environmental impacts of using steel pipes include the extraction and processing of raw materials, energy consumption during manufacturing, and carbon emissions. Additionally, the disposal of steel pipes can contribute to landfill waste. However, steel pipes are highly durable, recyclable, and have a long lifespan, which mitigates some of these negative impacts.

Q: How are steel pipes used in the construction of oil and gas pipelines?: Steel pipes are commonly used in the construction of oil and gas pipelines due to their strength, durability, and resistance to corrosion. These pipes are primarily used for transporting oil and gas over long distances, ensuring a reliable and efficient flow of these resources. The steel pipes are welded together to form a continuous pipeline that can withstand high pressure and extreme weather conditions. Additionally, their smooth interior surface minimizes friction and allows for efficient transportation of oil and gas.

Q: Can steel pipes be used for the construction of dams?: Yes, steel pipes can be used for the construction of dams. Steel pipes are often used in dam construction for various purposes such as water intake and outlet structures, penstocks, and spillway gates. They offer durability, strength, and resistance to corrosion, making them suitable for withstanding the high pressures and harsh environments associated with dam construction.

Q: Are steel pipes resistant to impact or external forces?: Yes, steel pipes are generally resistant to impact and external forces. Steel is known for its high strength and durability, making it an ideal material for various applications, including pipes. Steel pipes have the ability to withstand external forces such as impact, pressure, and vibrations. They are often used in industries that require reliable and sturdy piping systems, such as oil and gas, construction, and infrastructure. Additionally, steel pipes are less prone to cracking or breaking under extreme conditions compared to other materials. However, the resistance to impact and external forces may also depend on the specific grade and thickness of the steel used in the pipes.

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