ASTM A500/JIS/EN Rectangular hollow section pipe

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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?: Some of the different types of steel coatings used for pipes include epoxy coatings, polyethylene coatings, fusion bonded epoxy (FBE) coatings, and zinc coatings.

Q: How are steel pipes insulated for thermal applications?: Steel pipes are commonly insulated for thermal applications using various materials such as fiberglass, mineral wool, or foam insulation. These insulating materials are typically wrapped around the steel pipes to create a protective barrier that reduces heat transfer. Additionally, a vapor barrier may be installed to prevent moisture condensation. This insulation helps to maintain the desired temperature of the fluid or gas being transported through the pipes and prevents energy loss.

Q: Can steel pipes be used for underground sewerage systems?: Yes, steel pipes can be used for underground sewerage systems. Steel pipes are strong and durable, making them suitable for carrying sewage underground. They have a high resistance to corrosion and can withstand the pressure and load of the ground above. Steel pipes also have a long lifespan and are resistant to environmental factors such as moisture, chemicals, and temperature fluctuations. Additionally, steel pipes can be easily welded, making installation and repairs more convenient. However, it is important to ensure that the steel pipes are properly coated or lined to prevent corrosion and to comply with local regulations and standards for underground sewerage systems.

Q: Can steel pipes be used in extreme weather conditions?: Steel pipes are suitable for use in extreme weather conditions because they are known for their high strength and durability. This makes them applicable in construction, infrastructure, and transportation. Steel pipes are commonly used to transport fluids and gases across industries and are specifically designed to withstand harsh environmental conditions such as extreme temperatures, high pressures, and corrosive environments. Even in extreme weather conditions like intense heat, cold, or heavy rain, steel pipes can maintain their structural integrity and functionality. Moreover, they can be coated or insulated to provide extra protection against corrosion and maintain desired temperatures. In conclusion, steel pipes are a dependable option for extreme weather conditions due to their strength, durability, and ability to resist various environmental factors.

Q: How do steel pipes handle thermal expansion?: Steel pipes handle thermal expansion by expanding and contracting along their length due to changes in temperature. This expansion is accommodated by allowing the pipes to move freely or by using expansion joints, which can absorb the thermal expansion and prevent damage or failure.

Q: What are the common methods for cleaning the inner surface of steel pipes?: Cleaning the inner surface of steel pipes can be done using different methods. Some commonly used methods include: 1. Mechanical Cleaning: Debris, rust, or scale on the inner surface of the steel pipe can be physically removed using mechanical tools like wire brushes, scrapers, or abrasive pads. This method is effective for removing loose or loosely adhered contaminants. 2. Chemical Cleaning: Stubborn deposits, rust, or scale can be dissolved or loosened using acidic or alkaline solutions. These solutions are circulated through the pipe for a specific period, allowing the chemical to react and break down the contaminants. Chemical cleaning is used when mechanical cleaning is not enough. 3. High-Pressure Water Jetting: High-pressure water is directed through a nozzle into the steel pipe to remove debris, rust, or scale from the inner surface. The force of the water jet dislodges and flushes out the contaminants. This method is efficient for cleaning pipes with complex geometries or hard-to-reach areas. 4. Shot Blasting: High-speed abrasive particles are propelled against the inner surface of the steel pipe to remove rust, scale, or other contaminants. Shot blasting is commonly used for larger pipes or pipes with heavy deposits. It provides a thorough and uniform cleaning by removing the surface layer of the steel along with the contaminants. 5. Ultrasonic Cleaning: High-frequency sound waves are used to create microscopic bubbles in a cleaning solution. These bubbles implode upon contact with the inner surface of the steel pipe, effectively loosening and removing contaminants. Ultrasonic cleaning is particularly effective for cleaning small-diameter pipes or pipes with intricate details. It's important to consider factors such as the type and extent of contamination, pipe size and geometry, and desired level of cleanliness when choosing a cleaning method. Safety measures should always be taken to protect workers and maintain the integrity of the steel pipes.

Q: How are steel pipes protected against external moisture?: Steel pipes are protected against external moisture through a variety of methods. One common method is the application of a protective coating or paint on the surface of the pipes. This coating acts as a barrier, preventing moisture from coming into direct contact with the steel. The coating can be made of different materials, such as epoxy, polyethylene, or zinc, depending on the specific requirements and environment. Another method of protection is through the use of corrosion inhibitors. These inhibitors are added to the internal or external surfaces of the pipes, forming a protective layer that prevents moisture from causing corrosion. Corrosion inhibitors can be in the form of chemicals, such as rust converters or rust preventatives, which react with the steel to form a protective barrier. Additionally, steel pipes can be protected against external moisture through cathodic protection. This technique involves the use of sacrificial anodes or impressed current to create an electric current that protects the steel. Sacrificial anodes, typically made of zinc, aluminum, or magnesium, are attached to the steel pipes and corrode over time instead of the steel, thus preventing moisture-induced corrosion. Furthermore, proper insulation and waterproofing measures are crucial in protecting steel pipes from external moisture. Insulation materials, such as foam or tape, are applied to the pipes to provide an additional layer of protection and prevent moisture infiltration. Waterproofing measures, such as the use of sealants or membranes, can also be implemented to ensure that no moisture seeps into the pipes. Regular maintenance, including inspections and repairs, is essential to ensure the continued protection of steel pipes against external moisture. By promptly addressing any areas of damage or corrosion, the integrity of the protective measures can be maintained, prolonging the lifespan of the steel pipes and preventing costly repairs or replacements in the future.

Q: What is the role of steel pipes in the construction of bridges?: Steel pipes play a vital role in the construction of bridges as they are used for various purposes such as providing structural support, carrying water or gas, and facilitating the transportation of electrical and communication cables. Their strength, durability, and ability to withstand heavy loads make them an essential component in bridge construction, ensuring the stability and longevity of the structure.

Q: Can steel pipes be used for oil refineries?: Yes, steel pipes are commonly used in oil refineries due to their high strength, durability, and resistance to corrosion, making them suitable for transporting various petroleum products and chemicals within the refinery infrastructure.

Q: How are steel pipes insulated to prevent heat loss?: Steel pipes are typically insulated to prevent heat loss by wrapping them with insulation materials such as mineral wool, fiberglass, or foam. These insulation materials provide a barrier that traps heat within the pipes, preventing it from being lost to the surrounding environment. Additionally, pipes may also be covered with an outer protective layer, such as aluminum or PVC, to further enhance insulation and protect against external elements.

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