ERW casing

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Pre-galvanized Pipe America Standard Q235 A500 150g Hot Dipped or Galvanized Pipe

OD(Inch)	5	5 1/2	6 5/8	7	8 5/8	9 5/8	10 3/4	13 3/8	16	20
Thickness(mm)	5	6	7	8	9	10	11	12	13	14	15	16
Grade	J55	K55	N80	N80Q	L80	P110
standar d	API 5CT

Ends	Plain ends, cutting, threading, beveled, flange, etc
Packing	Packing in bundle with steel strips; with seaworthy package at the end; could be done with your requirement.
Certification	BV, IAF, SGS,COC, ISO or as per customer
Inspection	With Chemical Composition and Mechanical Properties Testing; Hydrostatic Test, Dimensional and Visual Inspection, Also With Nondestructive Inspection
Application	Urban construction pipe, machine structure pipe, agriculture equipment pipe, water and gas pipe, Greenhouse pipe, Building material tube, Low pressure fluid tube, Oil Industry pipe, etc
Trade Terms	FOB, CFR, CIF, EXW, etc.
Payment Terms	L/C, D/A, D/P, T/P Western Union, MoneyGram acceptable, T/T preferred
Delivery Time	Usually within 10-30 days after receipt of deposit, ASAP
Loading Port	Xingang , Tianjin
Original Place	Shandong, China

Q: What is the outer diameter and wall thickness of the welded steel pipe of national standard DN250?: DN (nominal diameter) 250 is generally the industry said 273, welded steel pipe (spiral steel pipe) thickness is generally between 6-8mm, more common.

Q: How are steel pipes used in the construction of wastewater treatment plants?: Steel pipes are commonly used in the construction of wastewater treatment plants for various purposes, such as transporting and distributing water, chemicals, and sludge within the facility. They are also used for constructing the main drainage systems, including sewer lines, stormwater drains, and effluent pipes, ensuring efficient and reliable flow of wastewater. Additionally, steel pipes are utilized for constructing the structural framework of treatment units, such as settling tanks, clarifiers, and aeration systems, providing stability and durability to withstand the harsh conditions of wastewater treatment processes.

Q: How do steel pipes handle extreme temperatures?: Steel pipes are highly durable and can handle extreme temperatures due to their inherent strength and heat resistance. They have a high melting point, allowing them to withstand both very high and very low temperatures without compromising their structural integrity. Additionally, steel pipes have excellent thermal conductivity, which enables them to efficiently transfer heat and prevent damage caused by extreme temperature fluctuations.

Q: Can steel pipes be used for conveying steam?: Indeed, steam can be conveyed using steel pipes. Steel pipes find frequent application in steam distribution systems owing to their impressive strength and long-lasting nature. They possess the ability to endure high temperatures and pressures associated with steam transportation without succumbing to deformation or leakage. Furthermore, steel pipes exhibit remarkable heat resistance properties, rendering them suitable for conveying steam at elevated temperatures. Nevertheless, it is crucial to guarantee adequate insulation of the steel pipes in order to avert heat loss and uphold the desired steam temperature throughout the transportation process.

Q: How are steel pipes coated for aesthetic purposes?: There are various ways to coat steel pipes for aesthetic purposes. One commonly used method is to apply a powder coating. This involves spraying a dry powder onto the pipe's surface and then heating it to create a durable and attractive finish. Powder coating offers a wide range of color options and provides a smooth coating. Another method is electroplating, which involves immersing the pipe in a solution containing metal ions and passing an electric current through it. This creates a thin, decorative layer on the surface of the pipe. Electroplating can produce shiny, reflective surfaces or more matte, textured appearances. Painting is also a popular method for coating steel pipes aesthetically. It involves applying liquid paint or enamel to the pipe's surface. By choosing different colors, textures, and finishes, painting allows for a variety of aesthetic possibilities. However, it is crucial to use paint specifically formulated for metal surfaces and capable of withstanding environmental conditions. In addition to these methods, steel pipes can be coated using techniques like hot-dip galvanizing or metal cladding. These processes involve applying a layer of another metal, such as zinc or aluminum, to the pipe's surface. This not only enhances the appearance but also protects against corrosion, extending the pipe's lifespan. Overall, there are multiple methods available for aesthetically coating steel pipes. Each method has its own advantages and should be selected based on the desired appearance, durability, and environmental conditions. Factors like color, texture, finish, and protective properties must be considered to ensure the desired aesthetic result is achieved.

Q: What are the different threading options for steel pipes?: The different threading options for steel pipes include tapered pipe threads (NPT/NPTF), straight pipe threads (NPS/NPSM), and mechanical threads (such as API threads). These threading options provide different levels of sealability, compatibility, and ease of installation, allowing for a variety of applications and connections.

Q: How are steel pipes used in plumbing?: Steel pipes are commonly used in plumbing for various applications such as water supply and drainage systems. They provide durability, strength, and resistance to corrosion, making them suitable for both residential and industrial plumbing. Steel pipes can be used for transporting water, gases, and other fluids, and are often connected with fittings and valves to create a reliable and efficient plumbing system.

Q: Can seamless steel pipe and ordinary steel pipe be welded?: Steel pipe and seamless linking points, you said should refers to ordinary steel pipe joints, if only consider the butt welding problem, two kinds of steel can be welded. But the mechanical properties of the seamless steel pipe and tube with different, generally the main difference is the two kinds of steel can withstand the pressure of the former than the latter to be good.So if your project is seamed steel pipe can be, then the two pipe welding, welding and butt welding interface is completely no problem.

Q: How do you calculate the thermal expansion of steel pipes?: To calculate the thermal expansion of steel pipes, you need to know the coefficient of thermal expansion (CTE) of the specific type of steel used. This value represents how much the steel material expands or contracts per unit length with each degree of temperature change. Once you have the CTE, you can multiply it by the initial length of the steel pipe and the temperature change to determine the thermal expansion. The formula is: Thermal Expansion = CTE x Initial Length x Temperature Change.

Q: How are steel pipes protected against external moisture?: Steel pipes can be safeguarded against external moisture in various ways. One commonly employed method involves applying a protective coating or paint to the pipe's surface, which acts as a barrier to prevent direct contact with moisture. Depending on the specific requirements and environment, this coating can be composed of different materials like epoxy, polyethylene, or zinc. Another means of protection is through the utilization of corrosion inhibitors. These inhibitors are added to either the internal or external surfaces of the pipes, creating a protective layer that hinders moisture-induced corrosion. Chemicals like rust converters or rust preventatives are examples of corrosion inhibitors that react with the steel, forming a protective barrier. Cathodic protection is an additional technique utilized to shield steel pipes from external moisture. This technique involves the use of sacrificial anodes or impressed current to generate an electric current that safeguards 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, thereby preventing moisture-induced corrosion. Moreover, proper insulation and waterproofing measures play a vital role in protecting steel pipes from external moisture. To provide an extra layer of protection and prevent moisture infiltration, insulation materials like foam or tape are applied to the pipes. Waterproofing measures such as sealants or membranes can also be implemented to ensure no moisture seeps into the pipes. Regular maintenance, including inspections and repairs, is crucial for ensuring the continuous 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, thereby extending the lifespan of the steel pipes and avoiding costly repairs or replacements in the future.

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