904l Stainless Steel Seamless Pipe in Wuxi ,China
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- Loading Port:
- Shanghai
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- Min Order Qty:
- 3 m.t.
- Supply Capability:
- 25000 m.t./month
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Specification
904L STAINESS STEEL
UNSN08904
DIN W.NR.1.4539
(Introduction of Commodity)
Similar Grade
UNS | ASTM A240 | Trademark |
UNS N08904 | SUS890L | 904L |
(Chemical Component)
Alloy | % | Ni | Cr | Cu | Mo | C | Mn | Fe | Si | P | S |
904L | Min | 23 | 19 | 1 | 4 | Balance | |||||
Max | 28 | 23 | 2 | 5.0 | 2 | 1 | Balance | 0.045 | 0.035 |
(Physical Properties)
Density | Fusion Point |
8.0g/cm3 | 1300-1390°C |
Mechanical Property
Alloy and state | Tensile Strength | Yield Strength | Elongation |
RM N/MM2 | RP0.2N/MM2 | A5% | |
904L | 490 | 216 | 35 |
904L is a fully austenitic structure, and the general content of high molybdenum austenitic stainless steel, 904L is not sensitive to the precipitation of the ferrite and the alpha phase.
Application
1. petroleum, petrochemical equipment, such as petrochemical equipment in the reactor, etc..
2. Storage and transportation equipment, such as heat exchangers, etc..
3. Power plant flue gas desulfurization device, the main use of the site are: absorption tower body, flue, file door, interior, spray system, etc..
4. Organic acid treatment system of scrubber and fan.
5. Seawater treatment plant, sea water heat exchanger, paper industry equipment, sulfuric acid, nitric acid equipment, acid, pharmaceutical industry and other chemical equipment, pressure vessels, food equipment.
6 .Pharmaceutical factory: centrifuge, reactor, etc..
7. Plant food: cans of soy sauce, cooking wine, salt, and dressing equipment.
8. Most suitable for dilute sulfuric acid and strong corrosive medium
Surface Finish :
Surface finish | Characteristics and application |
No.2B | The surface brightness and flatness of no2B is better than no2D. then through a special surface treatment to improve its mechanical properties, No2B could nearly satisfy comprehensive uses. |
No.3 | Polished with abrasive belt of git#100-#200, have better brightness with discontinuous coarse stria, used as inner and external ornaments for building, electrical appliances and kitchen utensils etc. |
No.4 | Polished with abrasive belt of grit #150-#180,have better brightness with discontinuous coarse stria, but thinner than No3, are used as bathtub buildings inner and external ornaments electrical appliances kitchen utensils and food processing equipment etc. |
HL | Polished with abrasive belt of grit #150-#320 on the NO.4 finish and has continuous streaks, mainly used as buildings ornaments elevators, door of building, frontal plate etc. |
BA | Cold rolled, bright annealed and skin-passed, the product have excellent brightness and good reflexivity like mirror, kitchen apparatus, ornament etc. |
8K | The product have excellent brightness and prefer reflexivity can to be the mirror. |
- Q:How do you prevent galvanic corrosion in stainless steel pipes?
- To prevent galvanic corrosion in stainless steel pipes, it is crucial to avoid direct contact with dissimilar metals. This can be achieved by using appropriate insulation or protective coatings on the pipes, ensuring that they do not come into contact with materials such as copper or aluminum. Additionally, employing dielectric unions or isolating gaskets at the connection points can help to minimize the risk of galvanic corrosion. Regular maintenance, including inspection and cleaning, is also essential to identify and address any potential issues before they escalate.
- Q:Can stainless steel pipes be electropolished?
- Yes, stainless steel pipes can be electropolished. Electropolishing is a process commonly used to enhance the surface finish of stainless steel by removing surface imperfections and contaminants. It involves immersing the stainless steel pipe in an electrolyte solution and applying an electric current to it. This process selectively removes a thin layer of material from the surface, resulting in a smooth and shiny finish. Electropolishing is particularly beneficial for stainless steel pipes used in industries such as pharmaceutical, food processing, and semiconductor, where a high level of surface cleanliness and corrosion resistance is required.
- Q:Can stainless steel pipes be wrapped with tape?
- Yes, stainless steel pipes can be wrapped with tape. However, it is important to use the appropriate type of tape designed specifically for stainless steel. This is because stainless steel pipes are often used in industrial and high-temperature applications, and ordinary tapes may not be able to withstand the extreme conditions. Stainless steel pipe tapes are typically made of materials like stainless steel foil or aluminum foil with a heat-resistant adhesive to ensure long-lasting durability and resistance to corrosion. These tapes can be used for various purposes such as insulation, sealing, or protection against abrasion. It is always recommended to consult the manufacturer's guidelines or seek professional advice before applying any tape to stainless steel pipes to ensure proper installation and avoid any potential issues.
- Q:What is the difference between Schedule and Nominal Pipe Sizes for stainless steel pipes?
- Stainless steel pipes can be described using Schedule and Nominal Pipe Sizes, but they have different focuses. Schedule denotes the pipe's wall thickness and is represented by a number. It is a standardized system used to classify pipes based on their wall thickness. The schedule number indicates how thick the pipe is in relation to its diameter. For instance, a Schedule 40 pipe has a thicker wall than a Schedule 10 pipe of the same diameter. The higher the schedule number, the thicker the wall. On the contrary, Nominal Pipe Size (NPS) represents the approximate inner diameter of the pipe and is expressed in inches. NPS is a size designation that doesn't directly correspond to the actual dimensions of the pipe. It serves as a convenient reference for identifying pipes and is often used in conjunction with the schedule number to specify a specific pipe. In summary, the main distinction between Schedule and Nominal Pipe Sizes for stainless steel pipes lies in what they describe. Schedule indicates the wall thickness, whereas Nominal Pipe Size refers to the approximate inner diameter of the pipe. Both factors are crucial when selecting the appropriate stainless steel pipe for a particular application.
- Q:How do you calculate the flow rate of fluid through stainless steel pipes?
- To determine the flow rate of fluid through stainless steel pipes, one can utilize either the Bernoulli's equation or the Darcy-Weisbach equation. These equations incorporate several factors, including the pipe's diameter, length, fluid viscosity, and the pressure difference between both ends. 1. Bernoulli's equation, which hinges on the principle of energy conservation, establishes a relationship between pressure, velocity, and elevation along the fluid's path. The equation is as follows: P1 + 0.5 * ρ * V1^2 + ρ * g * h1 = P2 + 0.5 * ρ * V2^2 + ρ * g * h2 Here: - P1 and P2 denote the pressures at the pipe's two ends. - ρ represents the fluid's density. - V1 and V2 denote the fluid velocities at each end of the pipe. - g signifies the acceleration caused by gravity. - h1 and h2 refer to the fluid elevations at the respective ends. By rearranging the equation and solving for either V1 or V2, one can calculate the fluid's velocity. Multiplying this velocity by the pipe's cross-sectional area yields the flow rate. 2. The Darcy-Weisbach equation, widely employed to calculate pressure drop or head loss due to frictional resistance in a pipe, is expressed as follows: ΔP = f * (L / D) * (ρ * V^2 / 2) Here: - ΔP represents the pressure drop between the pipe's two ends. - f denotes the Darcy friction factor, which relies on the Reynolds number and pipe roughness. - L corresponds to the pipe's length. - D signifies the pipe's diameter. - ρ represents the fluid's density. - V denotes the fluid's velocity. By rearranging the equation and solving for V, one can compute the fluid's velocity. Multiplying this velocity by the pipe's cross-sectional area provides the flow rate. It is crucial to acknowledge that these equations offer theoretical calculations, and actual flow rates may deviate due to additional factors such as pipe roughness, fittings, and bends. Consequently, it is advisable to account for these factors, conduct experiments, or consult industry standards for more precise calculations.
- Q:How do you calculate the weight of stainless steel pipes?
- In order to determine the weight of stainless steel pipes, several factors should be taken into account. Firstly, one needs to establish the pipe's outer diameter (OD) and thickness (T). Once these measurements have been obtained, the weight per foot (or meter) of the stainless steel pipe can be calculated using the following formula: Weight per foot (or meter) = (OD - T) * T * 0.0246615 It should be noted that this formula assumes the stainless steel pipe is of a circular shape. By multiplying the weight per foot by the length of the pipe in feet (or meters), the total weight can be determined. It is important to acknowledge that the density of stainless steel may vary depending on the specific grade and composition. Therefore, the weight calculated using this formula will provide an approximate value. For precise weight calculations, it is advisable to consult a reference table or contact the manufacturer for more accurate information.
- Q:Can stainless steel pipes be surface treated?
- Stainless steel pipes have the capability to undergo surface treatment, which is commonly performed to enhance their aesthetics, corrosion resistance, and durability. Surface treatment methods for stainless steel pipes include passivation, electropolishing, pickling, and the application of various coatings. Passivation involves eliminating impurities from the stainless steel's surface, resulting in the formation of a protective oxide layer that improves corrosion resistance. Electropolishing is an electrochemical process that smoothens and polishes the surface of stainless steel pipes, giving them a better appearance and reducing the chances of bacterial growth. Pickling, on the other hand, utilizes acid solutions to remove scale and oxide layers from the surface. Additionally, stainless steel pipes can be coated with substances like powder coating, paint, or plating to offer added protection against corrosion, enhance appearance, or fulfill specific requirements. In conclusion, the options for surface treatment of stainless steel pipes are extensive, allowing for customization to meet functional and aesthetic preferences.
- Q:How is stainless steel pipe different from carbon steel pipe?
- Stainless steel pipe and carbon steel pipe differ mainly in their composition and corrosion resistance properties. Stainless steel pipe contains a higher percentage of chromium, which forms a passive oxide layer on its surface, making it highly resistant to corrosion and oxidation. On the other hand, carbon steel pipe does not have this protective layer, making it more prone to rust and corrosion. Additionally, stainless steel pipe is generally more expensive than carbon steel pipe due to its superior corrosion resistance and durability.
- Q:Can stainless steel pipes be used for both high and low-pressure applications?
- Yes, stainless steel pipes can be used for both high and low-pressure applications. Stainless steel is known for its strength, durability, and resistance to corrosion, which makes it suitable for various pressure conditions. It can withstand high pressures without deformation or rupture, making it ideal for high-pressure applications such as oil and gas pipelines, chemical processing plants, and hydraulic systems. Additionally, it can also be used in low-pressure applications such as plumbing systems and water supply lines. The versatility of stainless steel pipes allows them to be used in a wide range of pressure conditions, making them a popular choice in many industries.
- Q:Can stainless steel pipes be used for oil and gas pipelines?
- Yes, stainless steel pipes can be used for oil and gas pipelines. Stainless steel is known for its high corrosion resistance, which makes it suitable for transporting oil and gas. It can withstand harsh conditions, including high pressure and temperature, ensuring the safety and efficiency of the pipeline system.
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904l Stainless Steel Seamless Pipe in Wuxi ,China
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 3 m.t.
- Supply Capability:
- 25000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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