Welded Black ERW Steel Pipe Q235B Scaffolding Pipe
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 27 m.t.
- Supply Capability:
- 6000 m.t./month
OKorder Service Pledge
OKorder Financial Service
You Might Also Like
1、Structure of Welded Black ERW Steel Pipe Q235B:
ERW steel pipe is electric resistance welding, the abbreviation for ERW for conveying gas, water, and petroleum foroil and natural gas industries. And used for structural steel pies purpose. As the manufacturing process does not include any welding, seamless pipes are perceived to be stronger and more reliable. Historically seamless pipe was regarded as withstanding pressure better than other types, and was often more easily available than welded pipe.
2、Main Features of Welded Black ERW Steel Pipe Q235B:
• High manufacturing accuracy
• High strength
• Good visual effect
• Reasonable price
• Small inertia resistance
• Strong heat dissipation ability
3、Welded Black ERW Steel Pipe Q235B Specification：
Standard | GB, DIN, ASTM ASTM A106-2006, ASTM A53-2007 |
Grade | 10#-45#, 16Mn 10#, 20#, 45#, 16Mn |
Thickness | 1 - 33 mm |
Section Shape | Round |
Outer Diameter | 21 - 610mm |
Place of Origin | Tianjin, China (Mainland) |
Secondary Or Not | Non-secondary |
Application | Hydraulic Pipe |
Technique | Cold Drawn |
Certification | API |
Surface Treatment | factory state or painted black |
Special Pipe | API Pipe |
Alloy Or Not | Non-alloy |
Length | 5-12M |
Outer Diameter | 21.3-610mm |
Grade | 20#, 45#, Q345, API J55, API K55, API L80, API N80, API P110, A53B |
Standard | ASME, ASTM |
1) Material:20#(ASTM A 106/A53 GRB.API5LGRB,GB),45#,16Mn,10#.
2) Specification range:OD:21.3-610mm,WT:6-70mm,length:6-12m or according to the requirement of clients.
3) Excutive standards:GB,ASME API5L.ASTM A 106/A53,Despite of the above standards,we can also supply seamless steel pipe with standard of DIN,JIS,and so on,and also develop new products according to the requirements of our clients!
4) Surface:black lacquered,varnish coating or galvanized.
5) Ends:Beveled or square cut,plastic capped,painted.
6) Packing:bundles wrapped with strong steel strip,seaworthy packing.
7) Shippment : This will be done under the request of clilents with the standard and professional agency.
4、Packaging & Delivery
Packaging Details: | seaworthy package,bundles wrapped with strong steel strip |
Delivery Detail: | 15-30days after received 30%TT |
5、FAQ of Welded Black ERW Steel Pipe Q235B:
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.
With sound reputation and high quality , we will offer clients a wonderful business experience. Hope we have the opportunity to develop our busyness successfully hand in hand.
6、 Welded Black ERW Steel Pipe Q235B Images：
- Q: How do you calculate the pipe head loss for steel pipes?
- The Darcy-Weisbach equation is utilized for calculating the pipe head loss in steel pipes. This equation establishes a connection between the head loss (hL) and various factors such as the flow rate (Q), pipe diameter (D), pipe length (L), fluid density (ρ), fluid velocity (V), and the friction factor (f). The formula can be expressed as: hL = (f * (L/D) * (V^2))/(2g) Where: - The head loss (hL) is measured in meters - The friction factor (f) is dimensionless - The pipe length (L) is measured in meters - The pipe diameter (D) is measured in meters - The fluid velocity (V) is measured in meters per second - The acceleration due to gravity (g) is typically taken as 9.81 m/s^2 The friction factor (f) relies on the Reynolds number (Re) of the flow, which is a dimensionless quantity representing the ratio of inertial forces to viscous forces. The Reynolds number can be calculated using the following equation: Re = (ρ * V * D) / μ Where: - The Reynolds number (Re) is dimensionless - The fluid density (ρ) is measured in kg/m^3 - The fluid velocity (V) is measured in meters per second - The pipe diameter (D) is measured in meters - The dynamic viscosity of the fluid (μ) is measured in Pa·s or N·s/m^2 The friction factor (f) can be obtained from empirical correlations or from Moody's diagram, which establishes a connection between the Reynolds number, the relative roughness of the pipe surface, and the friction factor. By substituting the calculated friction factor (f) and other known values into the Darcy-Weisbach equation, the head loss in the steel pipe can be determined. It is important to note that the head loss represents the energy lost due to friction and other factors and is usually expressed in terms of pressure drop or height difference.
- Q: What are the different coating materials used for steel pipes?
- Some common coating materials used for steel pipes include epoxy, polyethylene, polyurethane, and coal tar enamel. These coatings are applied to protect the steel from corrosion and provide a barrier against environmental elements.
- Q: Can steel pipes be used for heating and cooling systems?
- Yes, steel pipes can be used for heating and cooling systems. Steel pipes are commonly used in HVAC (heating, ventilation, and air conditioning) systems due to their durability, strength, and resistance to high temperatures. They are especially suitable for transporting hot water or steam for heating purposes and can also handle the circulation of chilled water for cooling systems.
- Q: What is the difference between cast iron and steel pipes?
- The main difference between cast iron and steel pipes lies in their composition and manufacturing process. Cast iron pipes are made from a strong, durable material that consists primarily of iron, carbon, and silicon. They are cast in molds and have a thick, heavy wall. Steel pipes, on the other hand, are made from an alloy of iron and carbon, usually with smaller amounts of other elements. They are manufactured using various methods, such as seamless or welded, and can have different wall thicknesses depending on their intended use. In summary, cast iron pipes are heavier and more brittle, while steel pipes are lighter and more flexible, making them suitable for different applications.
- Q: What is the maximum allowable pressure for steel pipes?
- The maximum allowable pressure for steel pipes depends on various factors such as the type of steel used, the diameter and thickness of the pipe, and the specific application or industry requirements. The American Society of Mechanical Engineers (ASME) provides guidelines and standards for pressure vessel and piping design, including the determination of maximum allowable pressure. ASME B31.1 and B31.3 are widely used codes for power piping and process piping respectively. These codes specify the design criteria for various materials, including steel, and provide formulas and charts to calculate the maximum allowable pressure for different pipe sizes and wall thicknesses. The maximum allowable pressure is typically determined based on the pipe's ability to withstand internal pressure without causing any permanent deformation or failure. It is important to note that the maximum allowable pressure for steel pipes may also be influenced by other factors such as temperature, corrosion, and the presence of any external loads or stresses. Therefore, it is essential to consult the relevant codes, standards, and engineering calculations specific to the application to ensure the safe and reliable operation of steel pipes under the given conditions.
- Q: Are steel pipes suitable for oil and petroleum applications?
- Yes, steel pipes are highly suitable for oil and petroleum applications. They possess excellent strength, durability, and resistance to corrosion, making them ideal for transporting and storing oil and petroleum products. Steel pipes can withstand high pressure and extreme temperatures, ensuring the safety and efficiency of oil and petroleum operations.
- Q: Can steel pipes be bent or shaped?
- Yes, steel pipes can be bent or shaped using various techniques such as cold bending, hot bending, or by using specialized machinery like pipe benders.
- Q: What are the different grades of steel used in manufacturing pipes?
- There are several grades of steel used in manufacturing pipes, including carbon steel, alloy steel, stainless steel, and duplex steel. Each grade has distinct properties and characteristics that make it suitable for different applications and environments.
- Q: How are steel pipes used in HVAC systems?
- Steel pipes are commonly used in HVAC systems for various purposes. They are used for transporting fluids such as water, steam, and refrigerant throughout the system. These pipes are durable and resistant to high temperatures and pressures, making them suitable for the demanding conditions of HVAC applications. They are used for distributing and circulating the heated or cooled air, as well as for connecting different components of the system, including boilers, chillers, heat exchangers, and air handlers. Additionally, steel pipes are often used for ventilation and exhaust purposes in HVAC systems.
- Q: How are steel pipes used in transportation?
- Steel pipes are commonly used in transportation for various purposes, such as in the construction of pipelines for transporting oil, gas, and water. They are also utilized in manufacturing vehicles, ships, and airplanes, where they serve as structural components or exhaust systems. Additionally, steel pipes are employed in the transportation of goods through conveyor systems and in the construction of railings and barriers for safety on roads and bridges.
Send your message to us
Welded Black ERW Steel Pipe Q235B Scaffolding Pipe
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 27 m.t.
- Supply Capability:
- 6000 m.t./month
OKorder Service Pledge
OKorder Financial Service
Similar products
Hot products
Hot Searches
Related keywords
