Rectangular Hollow Section Q195

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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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: Can steel pipes be used for sewer systems?: Yes, steel pipes can be used for sewer systems. Steel pipes are commonly used in sewer systems due to their durability, strength, and resistance to corrosion. They are able to withstand the harsh conditions and high pressure of sewage flow, making them a reliable choice for sewer infrastructure.

Q: What are the different methods of repairing steel pipes?: There are several methods to repair steel pipes, including welding, flange coupling, sleeve coupling, epoxy coating, and pipe lining.

Q: What is the difference between internal and external coating of steel pipes?: The main difference between internal and external coating of steel pipes lies in the purpose and location of the coatings. The internal coating is applied on the inner surface of the steel pipe to protect it from corrosion and ensure smooth flow of the contents within the pipe. It is commonly used to prevent contamination of the transported liquid or gas and to extend the lifespan of the pipe. On the other hand, the external coating is applied on the outer surface of the steel pipe to protect it from environmental factors such as moisture, chemicals, and physical damage. It helps to prevent corrosion and maintain the structural integrity of the pipe, especially in harsh conditions. Overall, while the internal coating focuses on the functionality and preservation of the transported contents, the external coating primarily aims at safeguarding the pipe itself from external influences.

Q: What are the common problems or issues faced with steel pipes?: Some common problems or issues faced with steel pipes include corrosion, leaks, blockages, and wear and tear. Corrosion can occur due to exposure to moisture or chemicals, leading to rust and weakening of the pipe. Leaks can arise from faulty connections or cracks in the pipe, resulting in water or gas leakage. Blockages can occur due to the accumulation of debris or mineral deposits, hindering the flow of fluids. Over time, steel pipes can also experience wear and tear, leading to erosion or cracks, which may require repair or replacement.

Q: What are the different types of coatings used for steel pipes?: There are several types of coatings used for steel pipes, including epoxy coatings, polyethylene coatings, fusion bonded epoxy coatings, and zinc coatings. Each type of coating offers different benefits and is used for specific applications to protect the steel pipes from corrosion and improve their durability.

Q: How are steel pipes insulated for thermal purposes?: Various methods are commonly employed to insulate steel pipes for thermal purposes. One method frequently utilized involves wrapping the pipes with insulation materials like fiberglass, mineral wool, or foam. These materials act as a barrier between the pipe and its surroundings, effectively preventing heat transfer or loss. To ensure the proper insulation of steel pipes, the insulation material is typically tightly wrapped around the pipe, leaving no gaps or openings for heat to escape. Adhesive tapes or metal bands are then used to secure the insulation in place. In addition to external insulation, internal insulation can also be applied to steel pipes. This involves placing insulation material inside the pipe, creating a protective layer against heat loss or gain. Internal insulation is commonly utilized in situations where the pipe carries hot fluids or gases. Moreover, certain steel pipes are designed to incorporate a built-in insulation layer. These pipes, known as pre-insulated pipes, already come equipped with insulation material integrated into their structure. The insulation layer is typically made of foam or mineral wool and is covered with a protective outer layer, ensuring effective thermal insulation. The insulation of steel pipes for thermal purposes plays a critical role in various industries, including oil and gas, HVAC, and plumbing. Proper insulation helps to maintain the desired temperature of fluids or gases flowing through the pipes, preventing energy loss and enhancing overall efficiency.

Q: What is the difference between steel pipes and cast iron pipes?: The main difference between steel pipes and cast iron pipes lies in their composition and durability. Steel pipes are made from an alloy of iron and carbon, which results in a strong and durable material. They are highly resistant to corrosion and can withstand high pressure and temperature. On the other hand, cast iron pipes are made from molten iron and have a higher carbon content. While they are also durable and have good pressure-bearing capabilities, they are more prone to rust and corrosion over time. Additionally, cast iron pipes are typically heavier and more brittle compared to steel pipes.

Q: Can steel pipes be used for transporting chemicals?: Yes, steel pipes can be used for transporting chemicals. Steel pipes are known for their high strength and durability, making them suitable for handling various chemicals, including corrosive substances. Additionally, steel pipes can withstand high pressure and temperature conditions, ensuring the safe transportation of chemicals. However, it is essential to select the appropriate grade of steel and implement proper coating or lining to prevent chemical reactions or corrosion that may compromise the integrity of the pipes.

Q: What are the different pipe fittings used with steel pipes?: Some of the different pipe fittings used with steel pipes include elbows, tees, couplings, unions, reducers, flanges, and caps.

Q: What is the difference between steel pipe and PVC conduit?: Steel pipe and PVC conduit serve distinct purposes and possess unique characteristics. The material composition stands as a primary distinction between steel pipe and PVC conduit. Steel pipe consists of robust and enduring materials, typically carbon steel or stainless steel, rendering it sturdy and resistant to impact. Consequently, it finds its utility in heavy-duty applications such as plumbing or structural support. In contrast, PVC conduit is constructed from polyvinyl chloride, a type of plastic. PVC's lightweight, flexibility, and ease of manipulation make it ideal for electrical purposes like safeguarding and directing electrical wires. Resistance to corrosion represents another disparity between the two. Steel pipe exhibits greater resistance to corrosion than PVC conduit, particularly when fortified with protective layers like zinc or epoxy. This makes steel pipe suitable for outdoor applications, subterranean installations, or environments with high moisture or corrosive elements. PVC conduit, while generally resistant to moisture and chemicals, may deteriorate over time when exposed to sunlight and can be harmed by specific chemicals. Consideration of cost becomes another factor. Steel pipe generally incurs greater expenses than PVC conduit due to its material and manufacturing process. Nonetheless, steel pipe's durability and extended lifespan establish it as a cost-effective selection in the long run, particularly for applications necessitating high strength and longevity. On the contrary, PVC conduit is comparatively inexpensive and readily accessible, rendering it a more affordable choice for numerous electrical projects. Lastly, installation methods differ between the two. Steel pipe is typically connected through threaded connections or welded joints, mandating specialized tools and skills. Conversely, PVC conduit can be effortlessly cut, assembled, and connected using PVC cement or fittings. This renders PVC conduit a more DIY-friendly option for electrical installations. In summary, steel pipe and PVC conduit diverge in terms of material composition, resistance to corrosion, cost, and installation methods. Steel pipe boasts strength, durability, and corrosion resistance, making it suitable for rigorous applications. PVC conduit, conversely, possesses lightness, flexibility, and affordability, rendering it ideal for electrical projects.

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