Hollow Section-Square Pipes With Best price

Hollow Section-Square Pipes With Best price System 1

Hollow Section-Square Pipes With Best price

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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Product Description:

1. Specification of ERW Welded Pipes-Square Tube and Pipe for Furniture ASTM A53 Hollow Section

1) Application: Greenhouse pipes, scaffolding pipes, transportation the ocean oil and gas, mechanical tube of ocean platform, power station, chemical industry and building, construction foundation piles, steel structure building, for low-pressur fluid service, steel structure bridges etc.

2) Standard: ASTM A53, BS1387, GB/T9711, GB/T39013

3) Steel Grade: Q195/Q215/Q235/Q345

2. Sizes of ERW Welded Pipe- Square Tube and Pipe for Furniture ASTM A53 Hollow Section

Outer Diameter: 1/2"x1/2"-16"x16''

Thickness:4.0-12.75mm

Length: As costumer's requirement

2. Packing & Delivery

Packing Detail: Packing in bundle with steel strips;with seaworthy package at the end; could be done with your requirement

Delivery Time: Within 30 Days after the reception of prepayment or L/C

3. Data Sheet

Standard: ASTM A53

Mechanical Properties

Standard	Grade	（MPa）	（MPa）
Standard	Grade	Yield strength	Tensile Strength
ASTM A53M	A	205	330
ASTM A53M	B	240	415

Chemical Composition(%)

Standard	Grade	C	Mn	P	S	V	Ni	Cu	Cr	Mo
Standard	Grade	Max	Max	Max	Max	Max	Max	Max	Max	Max
ASTM A53M	A	0.25	0.95	0.05	0.045	0.08	0.4	0.5	0.4	0.15
ASTM A53M	B	0.30	1.20	0.05	0.045	0.08	0.4	0.5	0.4	0.15

Q: What are the different methods of pressure testing steel pipes?: There are several methods of pressure testing steel pipes, including hydrostatic testing, pneumatic testing, and ultrasonic testing. Hydrostatic testing involves filling the pipe with water and applying pressure to check for leaks or weaknesses. Pneumatic testing uses compressed air or gas to pressurize the pipe and detect any leaks or failures. Ultrasonic testing utilizes high-frequency sound waves to inspect the pipe's integrity by detecting any flaws or defects.

Q: What are the factors to consider when designing a steel pipe system?: When designing a steel pipe system, several factors need to be considered. Firstly, the intended purpose of the system and the materials that will be transported through it are crucial. This determines the required pipe diameter, thickness, and material type to ensure compatibility and prevent corrosion or leakage. Secondly, the operating conditions, such as temperature, pressure, and flow rate, must be examined to select pipes with suitable strength and resistance properties. Additionally, factors like environmental conditions, including soil characteristics and exposure to chemicals or natural elements, should be evaluated to determine the necessary protective coatings or insulation. Lastly, considerations like installation requirements, regulatory compliance, and maintenance accessibility should be taken into account to design a practical and efficient steel pipe system.

Q: How do steel pipes handle thermal expansion and contraction?: The unique properties and design of steel pipes enable them to handle thermal expansion and contraction. When exposed to high temperatures, steel pipes expand as the molecules in the material gain energy and become more active. Conversely, when exposed to low temperatures, steel pipes contract as the molecules lose energy and become less active. To accommodate these changes, steel pipes are manufactured with specific features. One such feature is the inclusion of clearance between pipe joints. This clearance allows for expansion and contraction without causing stress or deformation in the pipe. Additionally, expansion joints or flexible connectors are used within the piping system to absorb thermal movements and prevent damage. Moreover, steel pipes are commonly installed with appropriate anchoring and support systems. These systems are designed to allow the pipes to expand and contract within a certain range without exerting excessive stress or strain on the structure or surrounding components. Anchoring and support systems also help maintain the overall stability and integrity of the piping system. In certain cases, thermal insulation materials are applied to steel pipes to minimize temperature changes and mitigate the effects of expansion and contraction. These insulating materials assist in maintaining a consistent temperature within the pipe, thereby reducing the magnitude of thermal movements. Overall, due to their inherent strength and flexibility, steel pipes are well-equipped to handle thermal expansion and contraction. With proper design, installation, and maintenance, steel pipes can effectively accommodate temperature changes without compromising their structural integrity or functionality.

Q: What are the different methods of joining steel pipes for high-pressure applications?: Some of the different methods of joining steel pipes for high-pressure applications include welding, threaded connections, flanged connections, and mechanical couplings. Welding involves fusing the pipes together using heat, making it a strong and permanent connection. Threaded connections involve screwing the pipes together using threads on the ends, which can be easily assembled and disassembled. Flanged connections involve using flanges and bolts to connect the pipes, providing a secure and leak-proof connection. Mechanical couplings use mechanical devices such as clamps or compression fittings to join the pipes, allowing for quick and easy installation and removal.

Q: How are steel pipes used in the manufacturing of pressure vessels?: Steel pipes are commonly used in the manufacturing of pressure vessels as they provide the necessary strength and durability to withstand high internal pressure. These pipes are welded or seamless and are often used as the main structural component of the vessel. They allow for the efficient flow of fluids or gases within the vessel and provide a reliable and secure containment system for various industrial applications.

Q: What are the different methods of threading steel pipes?: There are several methods of threading steel pipes, including manual threading, machine threading, and dielectric threading. Manual threading involves using a manual pipe threader or a handheld die to create the threads on the pipe. Machine threading, on the other hand, utilizes power-driven machines that can thread multiple pipes simultaneously, increasing efficiency and accuracy. Dielectric threading is a specialized method that uses a high-frequency electrical current to generate threads on the pipe, which is commonly used for stainless steel pipes.

Q: How are steel pipes used in the electronics industry?: Steel pipes are commonly used in the electronics industry for various purposes such as cable management, structural support, and conduit systems. They provide a strong and durable solution for organizing and protecting electrical wires and cables. Additionally, steel pipes are utilized in the construction of electronic equipment enclosures and racks, ensuring stability and efficient cooling.

Q: Can steel pipes be used for power plant construction?: Steel pipes are indeed suitable for power plant construction. They find wide usage in power plants for multiple purposes, including steam, water, and air/gas piping. Their strength, durability, and capacity to endure high temperatures and pressures make them highly recommended. Moreover, steel pipes possess exceptional resistance to corrosion, a crucial factor in power plant settings where various fluids and gases are transported. Furthermore, their easy weldability permits efficient installation and maintenance. In conclusion, steel pipes emerge as a dependable and economical option for constructing power plants.

Q: What is the difference between internal threading and external threading of steel pipes?: Internal threading and external threading are two different methods used to create threads on steel pipes. The main difference between them lies in the location of the threads. Internal threading refers to the process of cutting threads on the inside surface of a steel pipe. This method involves using a tool or a die to remove material from the inner diameter of the pipe, creating a helical groove. The resulting threads can be used to connect the pipe to other components, such as fittings or valves. On the other hand, external threading involves cutting threads on the outside surface of a steel pipe. This process usually requires the use of a threading die or a lathe to remove material from the outer diameter of the pipe, leaving behind a helical groove. The external threads allow the pipe to be connected to other components or fittings that have corresponding internal threads. The choice between internal and external threading depends on the specific application and the requirements of the project. Internal threading is often preferred when the pipe needs to be connected to components that have external threads, such as fittings or valves. External threading, on the other hand, is typically used when the pipe needs to be connected to components with internal threads, or when the pipe is intended to be screwed into a threaded hole or coupling. In summary, the main difference between internal threading and external threading of steel pipes is the location of the threads – internal threads are cut on the inside surface of the pipe, while external threads are cut on the outside surface. The choice between these methods depends on the specific application and the type of connections required.

Q: What is the impact resistance of steel pipes?: Steel pipes have high impact resistance, meaning they can withstand significant external forces without fracturing or breaking. This makes them highly durable and suitable for various applications, especially in industries where they are subjected to heavy loads or potential impacts.

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