black painted seamless grooved pipe for fire fighting
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Our company is specialized in the supply of Hot Dipped Galvanized Pipes. We supply stee pipesl with very competitive price to meet customers' needs with the satisfied service and high standard quality.
Name | galvanized pipe with the standard quality |
Material | Q195, Q215, Q235, Q345, STK500 |
Specification | O.D.: 20- 273.1MM W.T.: 0.8 - 5mm |
Length | 5.8m, 6m, 11.8m or 12m, or per the buyers demand |
Surface treatment | Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting. |
Certificates | BS1387-1985, DIN2440/2441, JIS-G3444 and ASTM |
Manufacture Technique | Seamless |
Section Shape | Round |
End | A): GTC (galvanized threaded and coupling) |
Weight | Billing on the basis of theoretical weight |
Packaging Details | Export packing or negotiation |
Trade Terms | FOB/CFR/CIF |
Payment Terms | L/C T/T |
Usage | Petroleum casing pipe/etroleum cracking pipe/gas cylinder tubes/highpressure boiler tubes/ high pressure chemical fertilizer pipe, ship tube |
Delivery Time | 7-30 days OR upon the negotation |
Minimum Order Quantity | 20/50/100 MT |
Supply Ability | 1000 Ton/Month |
Inspection | Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test. |
- Q:How do you calculate the stress in a steel pipe?
- To calculate the stress in a steel pipe, you need to consider the material properties of the steel and the external forces acting on the pipe. The stress in a pipe is typically calculated using the formula: Stress = Force / Area First, you need to determine the force acting on the pipe. This could be due to external loads such as pressure, weight, or mechanical forces. You can calculate the force by multiplying the pressure or weight by the surface area on which it acts. For example, if the pipe is subjected to an internal pressure, you can calculate the force using the formula: Force = Pressure x Area Next, you need to determine the cross-sectional area of the pipe. The cross-sectional area of a circular pipe can be calculated using the formula: Area = π x (Diameter / 2)^2 Once you have determined the force and the area, you can calculate the stress by dividing the force by the area. This will give you the stress value in units such as pounds per square inch (psi) or newtons per square meter (Pa). It is important to note that the stress calculation assumes that the pipe is in a state of equilibrium and that the material properties of the steel are known. The material properties, such as yield strength and ultimate tensile strength, are used to ensure that the stress calculated does not exceed the maximum capacity of the steel.
- Q:What is the weight and strength of steel pipes?
- The weight and strength of steel pipes differ based on their dimensions and the specific steel grade utilized. Typically, the weight of steel pipes is measured in pounds per foot or kilograms per meter. The strength of steel pipes is commonly evaluated in terms of yield strength and ultimate tensile strength. The weight of steel pipes can range from a few pounds per foot for smaller sizes to several hundred pounds per foot for larger diameters and thicker walls. Various factors, including the pipe's outer diameter, wall thickness, and length, impact the weight. For example, a 1-inch diameter steel pipe with a wall thickness of 0.125 inches may weigh approximately 0.67 pounds per foot. Conversely, a 12-inch diameter steel pipe with a wall thickness of 0.5 inches can weigh roughly 142 pounds per foot. The strength of steel pipes is determined by the grade of steel used, which can vary depending on the specific application and requirements. Commonly used steel grades for pipes include ASTM A53 for general purposes, ASTM A106 for high-temperature service, and API 5L for oil and gas transportation. These grades possess different yield strengths and ultimate tensile strengths. Yield strength denotes the amount of stress a steel pipe can endure before it starts to deform plastically. It is usually measured in pounds per square inch (psi) or megapascals (MPa). For instance, ASTM A53 Grade B steel pipe has a minimum yield strength of 35,000 psi (240 MPa), while API 5L Grade X65 steel pipe has a minimum yield strength of 65,000 psi (448 MPa). On the other hand, ultimate tensile strength signifies the maximum stress a steel pipe can withstand before fracturing. It is also measured in psi or MPa. For example, ASTM A106 Grade B steel pipe has an ultimate tensile strength of 60,000 psi (415 MPa), whereas API 5L Grade X65 steel pipe has an ultimate tensile strength of 77,000 psi (531 MPa). In conclusion, the weight and strength of steel pipes can vary based on their dimensions and the grade of steel used. The weight is influenced by factors like the pipe's diameter, wall thickness, and length, while the strength is determined by the steel's yield strength and ultimate tensile strength.
- 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:Do steel pipes require maintenance?
- Maintenance is necessary for steel pipes. Despite their durability and long lifespan, steel pipes can still experience wear and tear over time. To ensure optimal performance and extend their lifespan, regular maintenance is crucial. Inspecting the pipes for damage or corrosion is an important part of maintenance. Rust and corrosion can affect steel pipes, especially in high humidity or water-exposed environments. Regular inspections enable early detection of any problems, preventing more extensive damage and costly repairs in the future. Cleaning the pipes is another maintenance task. Over time, debris, sediment, or mineral deposits can accumulate in steel pipes. These build-ups can restrict fluid flow or impact the quality of transported materials. Regular cleaning removes these obstructions and maintains pipe efficiency. Periodic lubrication or coating may be necessary depending on the pipe's use. Lubricants and coatings reduce friction, prevent corrosion, and enhance durability. During maintenance, these can be applied to ensure smooth functioning and resistance to corrosion. In summary, regular maintenance is vital for steel pipes to maximize performance, prevent damage, and extend their lifespan. By investing time and effort in maintenance, potential issues can be identified and addressed early on, ultimately saving time and money in the long term.
- Q:Can steel pipes be used in marine environments?
- Yes, steel pipes can be used in marine environments. Steel is a durable and strong material that can withstand the harsh conditions of the marine environment, including exposure to saltwater, waves, and corrosion. However, it is important to select the correct type of steel and apply suitable protective measures to prevent corrosion. Stainless steel and corrosion-resistant alloys are commonly used in marine applications as they have a high resistance to corrosion and can handle the constant exposure to saltwater. Additionally, coatings such as epoxy or zinc can be applied to further protect steel pipes from corrosion. Regular maintenance and inspections are also crucial to ensure the longevity and performance of steel pipes in marine environments.
- Q:What is the difference between ERW and SAW steel pipes?
- ERW (Electric Resistance Welded) steel pipes are manufactured by rolling metal sheets into a tube shape and then welding the edges together using an electric current. On the other hand, SAW (Submerged Arc Welded) steel pipes are produced by placing a metal plate in a welding machine with a submerged arc welding process. The key difference lies in the welding technique used, with ERW pipes having a welded seam along the length, while SAW pipes have a more uniform and continuous weld. This difference in welding method also affects the overall strength and durability of the pipes, making them suitable for different applications.
- Q:How are steel pipes protected against internal corrosion?
- Steel pipes are protected against internal corrosion through various methods, such as applying protective coatings or linings to the inner surface of the pipes. These coatings act as a barrier between the steel surface and the corrosive elements present in the transported fluids. Additionally, cathodic protection can be employed, where a sacrificial anode or an impressed current system is used to prevent corrosion by diverting the electrical current away from the steel surface. Regular maintenance and monitoring are also crucial to ensure the ongoing protection of steel pipes against internal corrosion.
- Q:What are the non-destructive testing methods used for steel pipes?
- Some common non-destructive testing methods used for steel pipes include ultrasonic testing, magnetic particle testing, liquid penetrant testing, and visual inspection. These methods allow for the detection of defects or flaws in the pipes without causing any damage to the material.
- Q:How are steel pipes used in the construction of dams?
- Steel pipes are used in the construction of dams for various purposes such as water intake/outlet systems, penstocks, and spillway gates. These pipes are essential for transporting water to and from the dam, controlling the flow, and ensuring the dam's stability.
- Q:How are steel pipes used in the manufacturing of renewable energy systems?
- Steel pipes are extensively used in the manufacturing of renewable energy systems for various purposes. They are commonly used as structural components, providing strength and stability to wind turbines, solar panel supports, and hydroelectric power systems. Steel pipes are also utilized for transporting fluids such as water, steam, or gases in energy generation processes. Furthermore, they are essential in the construction of geothermal energy systems, where they are employed to create underground heat exchangers and piping networks. Overall, steel pipes play a crucial role in the efficient and reliable functioning of renewable energy systems.
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black painted seamless grooved pipe for fire fighting
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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