High Quality Hollow Section-Square Pipes

High Quality Hollow Section-Square Pipes System 1

High Quality Hollow Section-Square Pipes

Ref Price:

Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

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 is the role of steel pipes in the construction of stadiums?: Steel pipes play a crucial role in the construction of stadiums as they are used for various purposes including structural support, drainage systems, and the installation of utilities such as water, gas, and electrical lines. These pipes provide the necessary strength and durability to support the weight of the stadium's roof, seating areas, and other infrastructure. Additionally, steel pipes enable efficient transportation of liquids and gases, ensuring proper functioning of the stadium's facilities.

Q: What are the different types of steel pipe connections for oil and gas pipelines?: There are several types of steel pipe connections used for oil and gas pipelines, including threaded connections, welded connections, flanged connections, and grooved connections. Threaded connections involve screwing two pipe ends together using threads, providing a secure and leak-proof joint. Welded connections involve fusing pipe ends together using heat, creating a strong and durable joint. Flanged connections use a flange on each pipe end that is bolted together, providing a sturdy and easily removable joint. Grooved connections involve utilizing a groove on each pipe end, which is then locked together using a coupling, ensuring a reliable and flexible joint.

Q: What's the material of Q325 steel pipe?: In terms of deoxidation methods, F, B, Z can be expressed as boiling steel, flat killed steel, killed steel and boiling steel. They are deoxidized steel, which is of poor plasticity and toughness. Welded joints made of this material are susceptible to cracks when subjected to dynamic loads. Should not work at low temperatures, sometimes hardening. In contrast, calming steel is excellent and uniform, with good plasticity and toughness.

Q: Is the same specification seamless steel pipe more expensive than welded pipe?: Specifications of the same kind of seamless steel pipe than welded pipe prices are generally about 30% high, large diameter difference is greater.

Q: How do you calculate the pipe pressure drop for steel pipes?: To determine the pressure drop in steel pipes, there are two equations that can be utilized: the Darcy-Weisbach equation and the Hazen-Williams equation. The Darcy-Weisbach equation, although more precise, necessitates a greater amount of information. It takes into consideration the diameter, length, roughness, fluid flow rate, as well as fluid properties like viscosity and density. The equation is expressed as: To calculate the pressure drop (ΔP), the following formula can be used: (f * L * ρ * V^2) / (2 * D) In this formula: - ΔP denotes the pressure drop - f represents the friction factor (which can be determined using Moody's chart or empirical equations such as the Colebrook-White equation) - L signifies the length of the pipe - ρ denotes the fluid density - V represents the fluid velocity - D signifies the pipe diameter On the other hand, the Hazen-Williams equation is a simplified version commonly employed for water flow calculations. Although less accurate, it is more user-friendly. The equation is expressed as: To calculate the pressure drop (ΔP), the following formula can be used: K * Q^1.85 / (C^1.85 * d^4.87) In this formula: - ΔP denotes the pressure drop - K signifies the Hazen-Williams coefficient (which relies on the pipe material and roughness) - Q represents the flow rate - C signifies the Hazen-Williams roughness coefficient - d denotes the pipe diameter It is crucial to note that these equations provide estimations of the pressure drop, and actual conditions may vary due to factors such as fittings, bends, and valves in the pipe system. Furthermore, consistency in unit usage (e.g., SI units or US customary units) is of utmost importance when employing these equations.

Q: What are the different types of coatings applied to steel pipes?: There are several types of coatings that can be applied to steel pipes. Some common ones include fusion-bonded epoxy (FBE) coating, polyethylene (PE) coating, polypropylene (PP) coating, and zinc coating. These coatings serve various purposes such as corrosion protection, insulation, and enhancing the pipe's durability.

Q: What is the difference between steel pipes and copper pipes?: Steel pipes and copper pipes differ in terms of their material composition, with steel pipes being made of steel and copper pipes being made of copper. Steel pipes are generally stronger and more durable, making them suitable for high-pressure applications and underground installations. Copper pipes, on the other hand, have excellent heat conductivity and corrosion resistance, making them ideal for plumbing and heating systems. Additionally, copper pipes are more expensive than steel pipes but offer better resistance to bacteria growth. Ultimately, the choice between steel and copper pipes depends on the specific needs and requirements of the application.

Q: What is the difference between steel pipes and FRP pipes?: Steel pipes and FRP pipes are commonly used in various industries and applications, but they differ in several ways: 1. Material Composition: Steel pipes are constructed from iron and carbon alloys, along with elements like manganese, silicon, and small amounts of other metals. Conversely, FRP pipes consist of a polymer matrix reinforced with fibers such as glass or carbon. 2. Strength and Durability: Steel pipes are renowned for their exceptional strength and durability, enabling them to endure high pressures, heavy loads, and extreme temperatures. Although FRP pipes are also strong and durable, they are comparatively lighter in weight and may not possess the same level of strength as steel pipes. Nonetheless, they excel in corrosion resistance and have a longer lifespan in corrosive environments. 3. Corrosion Resistance: Steel pipes are susceptible to corrosion and thus require protective coatings or linings to prevent rust and deterioration. In contrast, FRP pipes possess inherent corrosion resistance and do not necessitate additional coatings. Consequently, they are well-suited for transporting corrosive fluids or functioning in corrosive environments. 4. Installation and Maintenance: Installing steel pipes necessitates specialized welding or threading techniques. Consequently, installation can be more labor-intensive and time-consuming, particularly for complex or large-scale projects. Conversely, FRP pipes are lightweight and easily transportable and installed. Often arriving in pre-fabricated sections, they expedite installation, reduce labor requirements, and demand minimal maintenance in comparison to steel pipes. 5. Cost: Generally, steel pipes are more expensive than FRP pipes due to the higher cost of raw materials and the need for additional corrosion protection measures. FRP pipes offer a cost-effective alternative, particularly in applications where corrosion resistance is paramount, as they eliminate the necessity for expensive coatings or linings. Ultimately, the selection between steel pipes and FRP pipes depends on the specific requirements of the application. Steel pipes are favored for their high strength, whereas FRP pipes offer advantages such as corrosion resistance, lightweight construction, and cost-effectiveness.

Q: How do steel pipes resist corrosion?: Steel pipes resist corrosion through a process called passivation, where a protective layer of chromium oxide forms on the surface of the steel, preventing direct contact with corrosive elements and slowing down the oxidation process. Additionally, steel pipes can be coated with protective layers such as zinc or epoxy to provide an extra barrier against corrosion.

Q: What are the applications of stainless steel pipes?: Stainless steel pipes have a wide range of applications due to their excellent properties. They are commonly used in industries such as oil and gas, chemical, pharmaceutical, food processing, and construction. These pipes are resistant to corrosion, heat, and pressure, making them suitable for transporting various fluids and gases. Additionally, they are used in plumbing systems, HVAC systems, structural frameworks, and even in decorative applications like handrails and furniture.

Send your message to us

*Email

*TEL

*Quantity

*Unit