High Quality Hollow Section-Square Pipes

High Quality Hollow Section-Square Pipes System 1

High Quality Hollow Section-Square Pipes

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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: How are steel pipes used in the infrastructure development?: Steel pipes are widely used in infrastructure development for various purposes such as water supply, sewage systems, gas pipelines, and transportation of oil and natural gas. They provide a durable and efficient solution for the construction of underground and aboveground infrastructure, ensuring the safe and reliable transportation of fluids and gases. Steel pipes are also used in the construction of bridges, buildings, and other structural components, as they offer strength, versatility, and resilience to withstand harsh environmental conditions.

Q: How are steel pipes used in tunnel construction?: Steel pipes are commonly used in tunnel construction for various purposes such as drainage, ventilation, and support. These pipes are installed to facilitate the removal of water from the tunnel, ensuring a dry working environment. They also serve as conduits for supplying fresh air and removing exhaust fumes. Additionally, steel pipes are utilized as structural supports, providing stability and reinforcement to the tunnel walls and ceilings.

Q: How are steel pipes used in the manufacturing of automobiles?: Steel pipes are commonly used in the manufacturing of automobiles for various applications, such as exhaust systems, fuel lines, and structural components. The high strength and durability of steel pipes make them ideal for these purposes, ensuring the safety and reliability of automobiles.

Q: How do you calculate the pipe thermal expansion for steel pipes?: To calculate the thermal expansion of steel pipes, you can use the formula: ΔL = α * L * ΔT, where ΔL represents the change in length, α is the coefficient of thermal expansion for steel, L is the original length of the pipe, and ΔT is the change in temperature.

Q: What are the different sizes of threads available for steel pipes?: The different sizes of threads available for steel pipes include standard pipe threads such as NPT (National Pipe Taper) and NPS (National Pipe Straight), as well as metric pipe threads like MPT (Metric Pipe Taper) and MPS (Metric Pipe Straight). These sizes can vary from 1/8 inch all the way up to several inches in diameter, depending on the specific application and industry requirements.

Q: What is the maximum allowable stress for steel pipes?: The maximum allowable stress for steel pipes depends on various factors such as the grade of steel, diameter, wall thickness, and the intended application. It is typically determined by industry standards and codes, such as the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code. Therefore, there is no one-size-fits-all answer to this question.

Q: How are steel pipes used in the oil and gas pipeline transportation?: Steel pipes are used in oil and gas pipeline transportation due to their durability, strength, and resistance to corrosion. They are used to transport crude oil, natural gas, and other petroleum products over long distances. Steel pipes ensure the safe and efficient transfer of these resources from production sites to refineries and distribution centers, ensuring a reliable supply of energy for industries and consumers.

Q: What are the different factors affecting the flow rate of steel pipes?: The flow rate of steel pipes can be affected by multiple factors. Let's explore some of these factors: 1. Pipe diameter: The size of the pipe plays a significant role in determining the flow rate. Generally, larger pipes allow for greater flow rates as they provide a larger cross-sectional area for the fluid to pass through. 2. Pipe length: The length of the pipe also impacts the flow rate. Longer pipes tend to have higher friction losses, which can decrease the flow rate. Moreover, longer pipes may require higher pressure to maintain the desired flow rate. 3. Fluid viscosity: The viscosity of the fluid passing through the pipe is an important consideration. Viscous fluids, such as heavy oils, exhibit higher resistance to flow, resulting in lower flow rates. Conversely, less viscous fluids, like water, encounter lower resistance and can achieve higher flow rates. 4. Pressure difference: The pressure difference across the pipe serves as a driving force for flow. A higher pressure difference will lead to a higher flow rate, while a lower pressure difference will reduce the flow rate. 5. Surface roughness: The roughness of the inner pipe surface influences the flow rate. Rough surfaces generate more turbulence and friction, thus resulting in a lower flow rate. Conversely, smoother surfaces minimize turbulence and friction, allowing for a higher flow rate. 6. Temperature: The temperature of the fluid can impact its viscosity and density, which subsequently affect the flow rate. Higher temperatures generally decrease the viscosity of fluids, leading to increased flow rates. 7. Pipe material: The choice of pipe material impacts the flow rate due to varying roughness and resistance. Steel pipes, for instance, typically possess a smoother inner surface compared to pipes made of other materials, resulting in higher flow rates. 8. Pipe fittings and bends: The presence of fittings, valves, and bends in the pipe can cause flow restrictions and pressure drops, which can decrease the flow rate. Proper design and placement of these components can minimize their impact on the flow rate. Understanding the interplay of these factors is essential for the design and optimization of fluid flow systems involving steel pipes.

Q: What are the different types of coatings used for external protection of steel pipes?: There are several types of coatings used for external protection of steel pipes. Some common ones include epoxy coatings, polyethylene coatings, coal tar coatings, and fusion bonded epoxy coatings. Each type of coating offers specific benefits and is chosen based on factors such as the environment, type of exposure, and desired level of protection.

Q: What is the maximum operating temperature for steel pipes?: The specific grade of steel used typically determines the maximum operating temperature for steel pipes. Carbon steel pipes, for instance, can generally endure temperatures ranging from 800-1000 degrees Fahrenheit (427-538 degrees Celsius). On the other hand, stainless steel or high-temperature alloys can withstand even higher temperatures, exceeding 1200-1500 degrees Fahrenheit (649-816 degrees Celsius). To determine the precise maximum operating temperature for a particular type of steel pipe, it is crucial to refer to the manufacturer's specifications or industry standards. This is because varying grades and compositions may have distinct temperature limits.

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