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 is the difference between steel pipes and cast iron soil pipes?: The main difference between steel pipes and cast iron soil pipes lies in their composition and durability. Steel pipes are primarily made of steel, a strong and versatile material known for its high tensile strength. On the other hand, cast iron soil pipes are made of cast iron, a material known for its excellent corrosion resistance and sound-dampening properties. While steel pipes are more rigid and suitable for carrying pressurized fluids, cast iron soil pipes are designed specifically for wastewater and sewage systems due to their superior resistance to rust and noise reduction qualities.

Q:How are steel pipes used in the construction of sewer systems?: Steel pipes are commonly used in the construction of sewer systems due to their durability and strength. They are used to transport wastewater and sewage from buildings to treatment plants or disposal sites. Steel pipes are resistant to corrosion and can withstand high pressure, making them ideal for underground applications. Additionally, their smooth interior prevents clogs and blockages, ensuring efficient flow and preventing damage to the sewer system.

Q:What is the difference between hot-finished and cold-finished steel pipes?: Hot-finished steel pipes are produced by heating the steel to a high temperature and then passing it through a series of rollers to give it the desired shape and size. This process results in a smooth surface finish and improved mechanical properties. On the other hand, cold-finished steel pipes are produced by cold drawing the steel through a die, resulting in a smaller diameter and improved dimensional accuracy. Cold-finished pipes have a smoother surface finish and tighter tolerances compared to hot-finished pipes.

Q:What are the different types of supports used for underground steel pipes?: There are several types of supports used for underground steel pipes, including concrete encasement, pipe saddles, bell and spigot joints, thrust blocks, and hangers. These supports help to distribute the weight of the pipe, provide stability, and prevent excessive movement or damage.

Q:What are the common maintenance practices for steel pipes?: The common maintenance practices for steel pipes include regular inspections for signs of corrosion or damage, cleaning and removing any debris or obstructions, applying protective coatings to prevent rust and corrosion, and conducting periodic leak tests to ensure the integrity of the pipes. Additionally, proper handling and storage procedures should be followed to prevent any physical damage or contamination.

Q:How are steel pipes repaired in case of damage or leaks?: Various methods can be used to repair steel pipes in the event of damage or leaks. Welding is a common approach where a filler material is melted along with the damaged or leaking area, creating a strong bond that seals the leak. This method is effective for small to moderate-sized leaks and finds wide application in industries like oil and gas, plumbing, and construction. Another method involves the use of mechanical couplings. These couplings are designed to connect two sections of pipe securely, ensuring a tight connection. They can be utilized to repair damaged or leaking sections of a steel pipe by removing the damaged area and replacing it with a new section that is linked using the mechanical coupling. This method is particularly useful for larger leaks or damaged sections that cannot be repaired through welding. In certain cases, temporary fixes can be applied using pipe clamps or epoxy compounds. Pipe clamps are employed to seal the damaged area tightly, preventing further leakage. On the other hand, epoxy compounds are directly applied to the damaged or leaking section, creating a temporary seal that stops the leak until a more permanent repair can be carried out. It is essential to consider the severity and location of the damage or leak, as well as the specific requirements of the application, when deciding on the method of repair. In some instances, it may be necessary to replace the entire section of the steel pipe if the damage is extensive or if multiple leaks are present. It is advisable to consult a professional or a specialized pipe repair service to determine the most suitable repair method for a particular situation.

Q:What is the difference between steel pipes and concrete-lined pipes?: Steel pipes are made entirely of steel and are known for their strength and durability. They are commonly used in various applications, including transporting liquids and gases, as well as structural support. On the other hand, concrete-lined pipes are made of steel with a layer of concrete applied to the inner surface. This concrete lining provides additional protection against corrosion and abrasion, making them suitable for transporting corrosive materials or in aggressive environments. The concrete lining also helps in reducing friction within the pipe, resulting in improved flow efficiency.

Q:What are the environmental impacts of steel pipe production and disposal?: Significant environmental impacts are associated with the production and disposal of steel pipes. First and foremost, the production of steel pipes necessitates the extraction of raw materials such as iron ore, coal, and limestone. This extraction process leads to the destruction of habitats, deforestation, and soil erosion. Furthermore, mining and processing these materials require a substantial amount of energy, often derived from fossil fuels, which contributes to the emission of greenhouse gases and air pollution. The manufacturing process itself encompasses various stages, such as melting, casting, rolling, and coating, all of which demand considerable energy inputs and emit substantial quantities of carbon dioxide and other greenhouse gases. Additionally, the production of steel pipes involves the utilization of chemicals and additives that can pose harm to the environment if not properly managed. Moreover, if steel pipes are not recycled or appropriately dealt with during disposal, they can end up in landfills, thus contributing to waste accumulation and occupying valuable space. Steel is typically non-biodegradable and can take hundreds of years to decompose. When steel pipes are dumped in landfills, they can release toxic substances and heavy metals, which can contaminate soil and groundwater. Nevertheless, it is important to acknowledge that steel pipes are highly recyclable, and recycling them significantly mitigates the environmental impact. Recycling steel pipes aids in the conservation of natural resources, reduces energy consumption, and lowers greenhouse gas emissions. Additionally, using recycled steel in the production of new pipes requires less energy and results in fewer emissions compared to using virgin materials. To minimize the environmental impacts of steel pipe production and disposal, it is crucial to advocate sustainable practices throughout the entire lifecycle of the product. This entails reducing energy consumption, utilizing renewable energy sources, implementing proper waste management strategies, and encouraging the recycling and reuse of steel pipes.

Q:What is the average lifespan of a steel pipe?: The average lifespan of a steel pipe can vary depending on various factors such as its quality, usage conditions, maintenance, and exposure to external factors. However, on average, a properly installed and maintained steel pipe can last anywhere from 20 to 100 years or more.

Q:Can steel pipes be used for underground water wells?: Yes, steel pipes can be used for underground water wells. Steel pipes are often chosen for their durability and strength, which makes them suitable for withstanding the pressure and weight of the surrounding soil and water. They are commonly used in both residential and industrial applications for drilling and constructing water wells. However, it is important to consider certain factors such as the type and quality of the steel, as well as the presence of corrosive elements in the water, to ensure the longevity and reliability of the well system. Additionally, proper insulation and coating may be required to prevent corrosion and contamination of the underground water source.

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