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: Can steel pipes be used for underground sewer systems?: Yes, steel pipes can be used for underground sewer systems. They are commonly used due to their strength, durability, and resistance to corrosion, making them suitable for handling wastewater and underground installation.

Q: How do you prevent steel pipes from rusting?: Various measures can be taken to prevent the rusting of steel pipes. One effective method is the application of a protective coating on the surface of the pipes. Different types of coatings, such as paint, epoxy, or zinc, can be used for this purpose. These coatings act as a barrier between the steel and the corrosive environment, thereby preventing direct contact between moisture, oxygen, and the metal, which can lead to rust formation. Another approach involves the use of corrosion inhibitors. These substances are added to the water or fluid flowing through the pipes, creating a protective film on the surface of the steel. This film acts as a shield, inhibiting the corrosion process and preventing the formation of rust. Regular maintenance plays a crucial role in preventing rust on steel pipes. It is essential to inspect the pipes regularly for any signs of damage or corrosion and promptly repair or replace any compromised areas. Additionally, keeping the pipes clean and dry by removing accumulated dirt or moisture helps prevent the formation of rust. In some cases, using stainless steel pipes instead of regular steel can be beneficial. Stainless steel contains chromium, which forms a passive oxide layer on the metal's surface. This layer acts as a natural barrier against corrosion, making stainless steel pipes highly resistant to rust. Finally, controlling the installation environment of the pipes can also help prevent rust. This can be achieved by maintaining proper ventilation, controlling humidity levels, and avoiding exposure to harsh chemicals or corrosive substances. By implementing these preventive measures, the lifespan and integrity of steel pipes can be significantly extended, while minimizing the risk of rust formation.

Q: Can steel pipes be used in earthquake-prone areas?: Yes, steel pipes can be used in earthquake-prone areas. Steel is a strong and durable material that can withstand the forces generated during an earthquake. The flexibility and ductility of steel allow it to absorb and dissipate the energy of seismic waves, reducing the risk of structural failure. Additionally, the ability to weld steel pipes allows for the construction of robust and earthquake-resistant structures. However, it is important to ensure proper engineering and construction practices are followed to ensure the steel pipes are installed and connected correctly to maximize their earthquake resistance. Local building codes and regulations should also be considered to ensure compliance and safety in earthquake-prone areas.

Q: How are steel pipes used in desalination plants?: Steel pipes are used in desalination plants to transport water, brine, and chemicals throughout the facility. They are highly durable and corrosion-resistant, making them ideal for handling the high-pressure and corrosive nature of the desalination process. Steel pipes ensure efficient and reliable water distribution, contributing to the overall effectiveness of desalination plants in converting seawater into fresh water.

Q: How are steel pipes threaded?: Steel pipes are typically threaded using a threading machine or a hand-held die. The process involves cutting grooves on the outer surface of the pipe to create a spiral pattern, allowing the pipe to be easily connected to fittings or other pipes.

Q: What are the lengths of scaffold steel tubes?: Scaffold tubes are our name for materials used to build scaffolding, because most scaffolding uses tubular bamboo or steel tubing. Bamboo and other bamboo is for a long time in the use of the scaffolding tube, but due to lack of safety and durability, now only in rural and urban area construction is lagging behind some of the home building small building has been used. The modernization construction, the most commonly used type of scaffolding pipe is steel pipe, the scaffolding should not only meet the demand of workers, but also to meet the characteristics of scaffolding firm and durable, so tough hard steel is the best choice. The selected steel pipe generally requires smooth surface, no cracks, no bending, no rust, and meet the relevant national standards.

Q: Can steel pipes be used for oil refinery applications?: Yes, steel pipes can be used for oil refinery applications. Steel pipes offer many advantages for oil refinery applications including high strength, durability, and resistance to corrosion. They are able to withstand high pressure and temperature conditions that are common in oil refinery operations. Steel pipes are also easy to transport and install, making them a popular choice for oil refinery projects. Additionally, steel pipes can be customized to meet specific requirements such as size, thickness, and coating, making them suitable for a wide range of oil refinery applications.

Q: Is the diameter of the steel tube indicated by the outer diameter by the wall thickness or by the inside diameter by the wall thickness?: Seamless steel pipe specifications are: outer diameter, wall thickness, material. Three of these reflect its main features.Welding pipe specifications are: nominal diameter (internal diameter), galvanized or non plated

Q: How are steel pipes protected against microbial corrosion?: Various methods are employed to safeguard steel pipes against microbial corrosion. One widely used technique entails applying coatings onto the surface of the pipes. These coatings act as a shield, effectively blocking the entry of microbes and their corrosive byproducts into the steel, thereby safeguarding it from degradation. Coatings like epoxy, polyethylene, and fusion bonded epoxy are frequently utilized to bestow this protection. Another method involves the use of corrosion inhibitors. These inhibitors are added to the fluid that flows through the pipes in order to impede microbial growth and prevent corrosion. They can be either organic or inorganic compounds that function by either eradicating the microbes or inhibiting their metabolic activity. Furthermore, ensuring proper maintenance and cleaning of the pipes is vital in preventing microbial corrosion. Regular inspections and cleaning routines aid in the elimination of any biofilms or microbial deposits that may have formed on the pipe's surface. This significantly reduces the likelihood of microbial corrosion and prolongs the lifespan of the pipes. In certain cases, cathodic protection may also be employed. This method entails utilizing sacrificial anodes or impressed current systems to supply a protective electrical current to the pipe. This current helps prevent the formation of corrosive microorganisms and shields the steel from corrosion. In summary, a combination of coatings, corrosion inhibitors, regular maintenance, and cathodic protection techniques are employed to protect steel pipes from microbial corrosion. By utilizing these strategies, the longevity and integrity of the pipes are ensured, benefiting various industries such as oil and gas, water supply, and sewage systems.

Q: What kinds of steel pipe are divided into?: The steel pipe seamless steel pipe and welded steel pipe (tube) two categories. According to the section shape and can be divided into round tube shaped tube, round steel pipe is widely used, but there are also some square, rectangular, semicircular, hexagonal, triangular, octagonal shaped steel tube.Seamless steel pipe: seamless steel pipe is ingot or solid billet made by capillary hole, then hot, cold or cold drawing. Made of seamless steel pipe specifications with outer diameter * wall thickness mm. Number of seamless steel pipe cold and hot points of seamless steel pipe (DIAL) two categories.

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