Cold formed welded square rectangular pipe for construction
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 10 m.t.
- Supply Capability:
- 15000 m.t./month
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Item specifice
1、 Square rectangular tubes for buildings
Square tube, square tube is a kind of call and rectangular tube, is equal and not equal to the length of steel pipe. Is the strip through the process of processing roll system. In general is the strip through the demolition of the package, flat, curly, welded to form a circular tube, and then rolled into a square tube and then cut into a square tube and then cut into the required length.
2、 Square rectangular tubes for buildings
• High manufacturing accuracy
• High strength
• Small inertia resistance
• Strong heat dissipation ability
• Good visual effect
• Reasonable price
3、 Square rectangular tubes for buildings
Standard | GB, DIN, ASTM |
Grade | 10#-45#, 16Mn 10#, 20#, 45#, 16Mn |
Thickness | 1.5 - 25 mm |
Section Shape | Square and rectangular |
Outer Diameter | 20*20 mm-------400*400mm 20*30mm*300*500mm |
Place of Origin | Tianjin, China (Mainland) |
Length | 3-12M |
Outer Diameter | 20*20 mm-------400*400mm 20*30mm*300*500mm |
Grade | 235B 345B |
Standard | ASME, ASTM |
1) Material:(ASTM A 106/A53 GRB.API5LGRB,GB,235B,345B
2) Specification range:OD: 20*30mm----300*500mm 20*20 mm---400*400mm ,WT: 1.5 - 25 mm ,length:3-12m or according to the requirement of clients.
3) Excutive standards:GB,ASME API5L.ASTM A 106/A53,Despite of the above
4) Surface:black lacquered,varnish coating or galvanized.
5) Ends:Beveled or square cut ,painted.
6) Packing:bundles wrapped with strong steel strip,seaworthy packing.
4、Packaging & Delivery
Packaging Details: | seaworthy package,bundles wrapped with strong steel strip |
Delivery Detail: | 15-30days after received 30%TT |
5、 Square rectangular tubes for buildings
①How is the quality of your products?
Our products are manufactured strictly according to national and internaional standard, and we take a test
on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.
②How about price?
Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.
③Why should you chose us?
Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.
6、 Square rectangular tubes for buildings
- Q:How do you determine the pipe schedule for steel pipes?
- The pipe schedule for steel pipes is determined based on several factors including the pressure rating, wall thickness, and outer diameter of the pipe. The pipe schedule is a standardized system used to classify the thickness of pipe walls, and it helps ensure compatibility and safety in various applications. To determine the pipe schedule for steel pipes, you need to consider the maximum pressure the pipe will be subjected to. This is usually expressed in pounds per square inch (psi) or bars. The pressure rating of a pipe indicates the maximum pressure it can withstand without failure or leakage. The higher the pressure rating, the thicker the pipe walls need to be. The wall thickness of the pipe is another important factor in determining the pipe schedule. It is typically expressed in inches or millimeters. The wall thickness is directly related to the pressure rating, as thicker walls can handle higher pressures. The American National Standards Institute (ANSI) provides a set of standard wall thicknesses for steel pipes known as the "pipe schedule." The outer diameter of the pipe is also considered when determining the pipe schedule. The outer diameter can vary depending on the specific application and requirements. It is important to choose a pipe with the appropriate outer diameter to ensure proper fit and compatibility with fittings, valves, and other components. In summary, the pipe schedule for steel pipes is determined by considering the maximum pressure, wall thickness, and outer diameter. By matching these factors with the appropriate pipe schedule, you can ensure that the steel pipe will be suitable for its intended use and capable of withstanding the required pressure.
- Q:What is the difference between steel pipes and PEX pipes?
- Steel pipes are made of metal and are known for their durability and strength. They are commonly used in industrial applications and for transporting fluids and gases. On the other hand, PEX pipes are made of a flexible plastic material called cross-linked polyethylene. PEX pipes are more flexible and easier to install compared to steel pipes. They are commonly used in residential plumbing systems due to their resistance to corrosion and ability to expand and contract with temperature changes.
- Q:What are the factors affecting the price of steel pipes?
- The price of steel pipes can be influenced by various factors. These factors encompass: 1. Raw material expenses: The cost of raw materials like iron ore and coal significantly influences the price of steel pipes. Fluctuations in commodity prices can impact the overall production cost and subsequently affect the selling price. 2. Supply and demand dynamics: The price of steel pipes is determined by the interplay of supply and demand. When there is high demand and limited supply, prices tend to rise. Conversely, an oversupply and low demand can lead to price decreases. 3. Production and manufacturing costs: The direct impact of production and manufacturing expenses on steel pipe prices cannot be overlooked. Costs related to labor, energy, transportation, and equipment maintenance all contribute to the overall production cost and, consequently, the selling price. 4. Market competition: The level of competition within the steel pipe industry also influences prices. Increased competition among manufacturers and suppliers can result in more competitive pricing. Conversely, fewer competitors may lead to higher prices due to limited options. 5. Government policies and regulations: Government policies and regulations exert a significant influence on steel pipe prices. Import tariffs, trade restrictions, and environmental regulations can all affect production costs and subsequently impact prices. 6. Currency exchange rates: Currency exchange rates can also sway steel pipe prices. Fluctuations in exchange rates between countries can impact the cost of importing or exporting steel pipes, which in turn affects their selling price. 7. Global economic conditions: The overall state of the global economy can have repercussions on steel pipe prices. During periods of economic growth, demand for steel pipes may increase, leading to higher prices. Conversely, economic downturns can result in decreased demand and subsequently lower prices. It is vital to acknowledge that these factors can interact and fluctuate over time, making the pricing of steel pipes a complex and ever-changing process.
- Q:How do you calculate the pipe flow rate for steel pipes?
- In order to calculate the flow rate of steel pipes, one must take into account various factors. Initially, the inside diameter of the pipe, which is commonly represented as D, needs to be determined. Subsequently, the length of the pipe, denoted as L, should be measured. Furthermore, one must be aware of the pressure drop, ΔP, across the pipe and the density of the fluid, ρ. Once all this information is obtained, either the Darcy-Weisbach equation or the Hazen-Williams equation can be utilized to calculate the flow rate. The Darcy-Weisbach equation is typically employed for pipes with turbulent flow, whereas the Hazen-Williams equation is commonly used for pipes with laminar flow. For the Darcy-Weisbach equation, the formula is as follows: Q = (π/4) * D^2 * √(2ΔP/ρ) Here, Q denotes the flow rate in cubic meters per second, D represents the inside diameter of the pipe in meters, ΔP signifies the pressure drop across the pipe in pascals, and ρ stands for the fluid density in kilograms per cubic meter. On the other hand, for the Hazen-Williams equation, the formula is as follows: Q = C * (D^2.63) * (ΔP^0.54) * (L^0.63) In this case, Q represents the flow rate in cubic meters per second, D denotes the inside diameter of the pipe in meters, ΔP signifies the pressure drop across the pipe in pascals, L represents the length of the pipe in meters, and C represents the Hazen-Williams coefficient, which relies on the roughness of the pipe. To ensure an accurate calculation of the pipe flow rate, it is imperative to maintain consistent units of measurement throughout the calculation. Additionally, precise measurements of the inside diameter, length, pressure drop, and fluid density are crucial in obtaining reliable results.
- Q:What are the different methods of coating steel pipes?
- There are several methods of coating steel pipes, including fusion bonded epoxy (FBE) coating, liquid epoxy coating, polyethylene (PE) coating, and polyurethane (PU) coating. Each method offers unique advantages and is chosen based on factors such as the desired level of corrosion protection, application environment, and project requirements.
- Q:Are steel pipes suitable for conveying fluids?
- Yes, steel pipes are suitable for conveying fluids. They are widely used in various industries for transporting liquids and gases due to their high strength, durability, and resistance to corrosion.
- Q:What is the purpose of pipe flanges in steel pipes?
- The purpose of pipe flanges in steel pipes is to provide a secure and leak-proof connection between two pipes or to other equipment, such as valves or pumps. Flanges allow for easy assembly and disassembly of pipe sections, as well as providing a means for maintenance and repairs. Additionally, they provide a stronger connection, ensuring the integrity and stability of the pipeline system.
- Q:What are the different threading options for steel pipes?
- The different threading options for steel pipes include tapered thread, straight thread, and multiple thread options. Tapered threads are commonly used for pipes that carry fluids or gases under pressure, as they provide a tight seal. Straight threads are used for pipes that require a secure connection but do not need to be sealed tightly. Multiple thread options, such as double and triple threads, are used for high-pressure applications where a stronger connection is needed.
- Q:What are the common welding techniques used for steel pipes?
- The common welding techniques used for steel pipes include shielded metal arc welding (SMAW), gas metal arc welding (GMAW), flux-cored arc welding (FCAW), and submerged arc welding (SAW).
- Q:Can steel pipes be used for power plant construction?
- Yes, steel pipes can be used for power plant construction. Steel pipes are commonly employed in power plants for various applications such as the transportation of fluids, steam, and gases, as well as for structural support. They offer high strength, durability, and resistance to extreme temperatures and pressures, making them suitable for the demanding conditions found in power plants.
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Cold formed welded square rectangular pipe for construction
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 10 m.t.
- Supply Capability:
- 15000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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