Construction 20# 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 big is the seamless steel tube of DN50?: This refers to the diameter of the steel pipe is 50 mm, DN50 steel pipe diameter is 60.3 mm, that is, 60.3 * 5 mm steel pipe

Q: Can steel pipes be used for hydronic heating systems?: Yes, steel pipes can be used for hydronic heating systems. Steel pipes are commonly used in hydronic heating systems due to their durability, strength, and ability to withstand high temperatures and pressures. They are also resistant to corrosion, making them suitable for long-term use in these systems.

Q: How are steel pipes tested for leaks?: Steel pipes can be tested for leaks using various methods, including hydrostatic testing, pneumatic testing, and using leak detection equipment such as ultrasonic testing or helium testing.

Q: What is the difference between steel pipes and concrete pipes?: Steel pipes and concrete pipes differ in their composition, construction, and characteristics. Steel pipes are made from steel, whereas concrete pipes are made from a mixture of cement, sand, aggregate, and water. Steel pipes are known for their strength, durability, and resistance to corrosion, making them suitable for high-pressure applications and underground installations. Concrete pipes, on the other hand, are renowned for their affordability, ease of installation, and resistance to fire. They are commonly used in stormwater drainage systems and sewerage networks. Overall, the choice between steel pipes and concrete pipes depends on the specific requirements of the project, such as budget, load-bearing capacity, and environmental factors.

Q: What are the common methods for joining steel pipes?: There are several common methods for joining steel pipes, depending on the specific application and requirements. Some of the most commonly used methods include: 1. Welding: This is one of the most common methods of joining steel pipes. It involves heating the ends of the pipes and applying pressure to fuse them together. Welding can be done using various techniques such as arc welding, MIG welding, TIG welding, or even laser welding. 2. Threaded connections: In this method, the ends of the steel pipes are threaded to create a male and female connection. These threaded ends are then screwed together using pipe threads. Threaded connections are commonly used for smaller diameter pipes and in low-pressure applications. 3. Flanged connections: Flanges are used to join steel pipes in applications that require easy assembly and disassembly or when frequent maintenance is needed. Flanges are flat, circular discs with bolt holes that allow the pipes to be bolted together. The flanges provide a strong and leak-proof connection. 4. Compression fittings: Compression fittings are used to join steel pipes without the need for welding or threading. They consist of a compression nut, a compression ring, and a compression sleeve. The nut is tightened onto the sleeve, compressing it against the pipe, creating a secure connection. 5. Grooved couplings: Grooved couplings are used to join steel pipes by creating a mechanical connection. The pipe ends are grooved, and a gasket is placed between the grooves. The couplings are then tightened, compressing the gasket and creating a tight seal. 6. Soldering or brazing: These methods involve using a filler metal that has a lower melting point than the steel pipes. The filler metal is heated and melted, allowing it to flow between the pipe joints, creating a bond. Soldering is typically used for smaller diameter pipes and low-pressure applications. Each joining method has its advantages and limitations, and the choice of method depends on factors such as the pipe diameter, the application, the working pressure, and the required durability of the joint. It is important to consider these factors and consult industry standards and guidelines when selecting the appropriate method for joining steel pipes.

Q: How do steel pipes differ from other types of pipes?: Steel pipes differ from other types of pipes in a few key ways. Firstly, steel pipes are known for their strength and durability. They have a high resistance to heat, pressure, and corrosion, making them suitable for a wide range of applications. This strength also allows steel pipes to withstand heavy loads and provide a long service life. Another distinguishing feature of steel pipes is their versatility. Steel pipes can be manufactured in various shapes and sizes to meet specific project requirements. This adaptability makes them a popular choice for a wide range of industries, including construction, oil and gas, water treatment, and manufacturing. Steel pipes also offer excellent thermal conductivity, meaning they can efficiently transfer heat from one area to another. This makes them suitable for applications such as heating and cooling systems, as well as for transporting hot fluids or gases. Furthermore, steel pipes are known for their resistance to fire. They have a high melting point and do not easily catch fire or contribute to the spread of flames. This property is crucial in applications where fire safety is a concern, such as in buildings or industrial facilities. Lastly, compared to other types of pipes, steel pipes have a higher initial cost. However, their long-term benefits, such as their durability and low maintenance requirements, often outweigh the initial investment. Steel pipes are also highly recyclable, making them an environmentally friendly choice. In summary, steel pipes stand out from other types of pipes due to their strength, durability, versatility, excellent thermal conductivity, fire resistance, and recyclability. These qualities make steel pipes a preferred option for a wide range of applications in various industries.

Q: What are the factors to consider when selecting pipe materials for corrosive environments?: When selecting pipe materials for corrosive environments, there are several important factors to consider in order to ensure the longevity and effectiveness of the piping system. 1. Corrosion Resistance: The most crucial factor to consider is the corrosion resistance of the pipe material. It is essential to choose a material that is highly resistant to corrosion, as corrosive environments can cause significant damage to pipes over time. Materials such as stainless steel, fiberglass, and certain types of plastics like PVC and CPVC are known for their excellent resistance to corrosion. 2. Chemical Compatibility: It is important to assess the chemical compatibility of the pipe material with the specific corrosive environment it will be exposed to. Different materials have different resistance levels to various chemicals, so it is crucial to ensure that the chosen material can withstand the specific chemicals present in the environment. Consulting chemical compatibility charts and seeking expert advice can help in making the right material selection. 3. Temperature and Pressure Requirements: The temperature and pressure conditions within the corrosive environment should also be considered when selecting pipe materials. Some materials may have limitations in terms of their temperature and pressure resistance, and exceeding these limits can lead to pipe failure. It is important to choose a material that can handle the required temperature and pressure ranges without compromising its structural integrity. 4. Cost: The cost of the pipe material and its installation should also be taken into account. While certain materials may be highly resistant to corrosion, they can also be more expensive. It is essential to strike a balance between the desired level of corrosion resistance and the available budget. 5. Maintenance and Durability: The maintenance requirements and overall durability of the pipe material should be evaluated as well. Some materials may require more frequent inspections, cleaning, or repairs compared to others. Considering the anticipated lifespan of the piping system and the ease of maintenance can help in selecting a material that will provide long-term reliability and cost-effectiveness. In conclusion, when selecting pipe materials for corrosive environments, one should consider factors such as corrosion resistance, chemical compatibility, temperature and pressure requirements, cost, and maintenance and durability. By carefully evaluating these factors, one can choose a pipe material that best suits the specific corrosive environment and ensures a reliable and long-lasting piping system.

Q: How to make the steel pipe spray paint is not easy to fall off?: First, clean the surface of the object to be sprayed (pay attention to whether or not to paint off, which is the key):Remove rust stains, oil and so on, when spraying, the nozzle and spray the best distance is 20cm, should be two times forming, first thin spray again, dry, and then spray second times, this is more uniform, and not easy to hang

Q: What is the fire rating of steel pipes?: Several factors determine the fire rating of steel pipes. Steel possesses inherent fire resistance due to its high melting point and low thermal conductivity. However, the fire rating of steel pipes can be further improved by employing fire-resistant coatings or insulation materials. These additional measures can offer different levels of fire protection, typically quantified by how long the pipes can retain their structural integrity during a fire situation. The precise fire rating of steel pipes may differ depending on the thickness and type of coating or insulation employed. To ascertain the appropriate fire rating requirements for specific applications, it is crucial to refer to industry standards, such as those established by organizations like the National Fire Protection Association (NFPA), or consult with fire safety professionals.

Q: What is a tight steel tube?: JDG pipe is the replacement of traditional PVC and SC pipes and other traditional wire conduits. It is a breakthrough in the field of building electrical field using new materials and technologies. The JDG pipe adopts the cross connecting ground wire of galvanized steel pipe and thin-wall steel pipe, overcomes the defects of complicated construction and large construction loss of common metal pipe, and solves the problems of poor fire resistance and difficult grounding of PVC pipe. Because the JDG pipe material is more expensive than the ordinary pipe material, it is more used in the construction, such as comprehensive wiring, fire protection wiring and so on.

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