904l Stainless Steel Seamless Pipe in Wuxi ,China

904l Stainless Steel Seamless Pipe in Wuxi ,China

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 3 m.t.

Supply Capability:: 25000 m.t./month

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Specification

Standard:

ASTM

Technique:

Cold Rolled

Shape:

Round

Surface Treatment:

Polished

Steel Grade:

300 Series

Certification:

SGS

Thickness:

Length:

50.1

Net Weight:

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
904L	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
Alloy and state	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.

904l Stainless Steel Seamless Pipe in Wuxi ,China

Q: What are the weld sleeves for stainless steel pipes?: Stainless steel pipe is a kind of hollow long strip round steel, mainly used in petroleum, chemical, medical, food, light industry, machinery, instrument and other industrial pipeline and mechanical structure parts. In addition, the bending and torsional strength of the same weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also used to produce all kinds of conventional weapons, guns, shells and so on.

Q: Can stainless steel pipes be threaded?: Yes, stainless steel pipes can be threaded. Threading is a common process used to create a screw-like groove on the outside of the pipe, allowing it to be connected to other fittings or components. Stainless steel is a versatile material that can be threaded using various methods, such as cutting or rolling, to accommodate different applications and industry standards.

Q: Are stainless steel pipes suitable for food storage facilities?: Stainless steel pipes are a perfect fit for food storage facilities. The food industry widely embraces stainless steel due to its many advantageous properties. Firstly, stainless steel's resistance to corrosion is crucial in food storage facilities where exposure to moisture and various food products is common. This resistance guarantees that the pipes will not rust or deteriorate over time, thus preventing any potential contamination of the stored food. Furthermore, stainless steel pipes are easy to clean and maintain, making them the ideal choice for food storage facilities that must comply with strict hygiene standards. The smooth and non-porous surface of these pipes prevents the buildup of bacteria, ensuring that the stored food remains safe and uncontaminated. Stainless steel is also a non-reactive material, meaning it does not release any harmful substances into the food. This is particularly important in food storage facilities, as it guarantees the preservation of the integrity and quality of the stored food products. Additionally, stainless steel pipes possess excellent strength and durability, enabling them to withstand the high pressures and temperature fluctuations commonly encountered in food storage facilities. This ensures that the pipes will not fail or break, providing a dependable and long-lasting solution. To conclude, stainless steel pipes are highly suitable for food storage facilities due to their resistance to corrosion, ease of cleaning, non-reactive nature, and strength. They create a safe and hygienic environment for storing food, thereby ensuring the preservation of the integrity and quality of the stored products.

Q: How do you determine the size of a stainless steel pipe?: To ascertain the dimensions of a stainless steel pipe, several crucial factors must be taken into account. First and foremost, the outside diameter (OD) of the pipe needs to be measured. This can be achieved by employing either a caliper or a tape measure. It is imperative to ensure that the measurement is taken across the widest point of the pipe in order to obtain an accurate reading. Following that, the wall thickness of the pipe should be determined. This can be accomplished by employing a caliper or a pipe gauge. The wall thickness plays a pivotal role in determining the pipe's strength and durability. Once the measurements for the OD and wall thickness are obtained, one can proceed to calculate the nominal pipe size (NPS) or the trade size of the stainless steel pipe. This measurement is typically expressed in inches and denotes the inner diameter (ID) of the pipe. Industry standards or pipe size charts available online can be utilized to determine the NPS. It is worth noting that stainless steel pipes are commonly available in various schedules, which indicate the varying wall thicknesses. These schedules range from Schedule 5S (the thinnest) to Schedule XXS (the thickest). The pipe's schedule should be taken into consideration when determining its size as it impacts the pipe's pressure rating and suitability for specific applications. In summary, determining the size of a stainless steel pipe involves measuring the outside diameter, determining the wall thickness, and calculating the nominal pipe size based on industry standards or pipe size charts.

Q: How do you prevent vibration in stainless steel pipes?: There are several measures that can be taken to prevent vibration in stainless steel pipes. 1. Use proper pipe supports: The selection and installation of appropriate pipe supports are crucial in preventing vibration. Ensure that the supports are designed to provide adequate stability and rigidity to the pipe system. This will help to minimize any potential movement or vibration. 2. Dampen vibrations with isolators: Install vibration isolators at strategic points along the pipe system. These isolators are designed to absorb and dampen vibrations, thereby reducing the transmission of vibrations through the stainless steel pipes. 3. Proper pipe alignment: Ensure that the pipes are properly aligned during installation. Misalignment can lead to stress concentrations and increased vibration. Proper alignment will help to distribute the forces evenly and reduce vibration. 4. Reduce fluid velocity: High fluid velocities can cause turbulence and induce vibrations in the pipe system. By reducing the fluid velocity through the pipes, you can minimize the occurrence of vibrations. This can be achieved by adjusting the flow rate or by using flow control devices such as throttling valves. 5. Soundproofing measures: In some cases, vibrations can be caused by external factors such as nearby machinery or equipment. Implement soundproofing measures to reduce the noise and vibrations generated by these sources. This can include using noise-absorbing materials or installing barriers to block or redirect the vibrations. 6. Regular maintenance and inspection: Regularly inspect the pipe system for any signs of vibration or wear. Address any issues promptly to prevent further vibration problems. Additionally, ensure that the pipe system is properly maintained, including regular cleaning and lubrication of any moving parts. By implementing these measures, you can effectively prevent vibration in stainless steel pipes, ensuring the overall stability and integrity of the pipe system.

Q: What are the different standards and specifications for stainless steel pipes?: There are several different standards and specifications for stainless steel pipes, which vary based on their intended use and the region in which they are being used. Some of the most common standards and specifications for stainless steel pipes include: 1. ASTM (American Society for Testing and Materials): ASTM A312/A312M is a standard specification for seamless, welded, and heavily cold worked austenitic stainless steel pipes. This specification covers various grades of stainless steel pipes for high-temperature and general corrosive service. 2. ASME (American Society of Mechanical Engineers): ASME B36.19M is a standard specification for stainless steel pipes that covers the dimensions, wall thickness, and tolerances for both welded and seamless pipes. ASME B36.10M is another standard that specifies the dimensions and tolerances for seamless and welded stainless steel pipes. 3. EN (European Norms): EN 10216-5 is an European standard that specifies the technical delivery conditions for stainless steel seamless pipes for pressure purposes. EN 10217-7 is another European standard that covers welded stainless steel tubes for pressure purposes. 4. JIS (Japanese Industrial Standards): JIS G3459 is a standard specification for stainless steel pipes that are used for high-temperature service. JIS G3468 specifies the stainless steel pipes for general service. 5. DIN (Deutsches Institut für Normung): DIN EN 10216-5 is a German standard that specifies the technical delivery conditions for stainless steel seamless pipes for pressure purposes. DIN EN 10217-7 is another German standard that covers welded stainless steel tubes for pressure purposes. These are just a few examples of the numerous standards and specifications available for stainless steel pipes. It is important to consult the appropriate standard and specification based on the specific requirements and application of the stainless steel pipes to ensure proper performance and compliance with industry standards.

Q: What is the difference between 430 and 316 stainless steel pipes?: The main difference between 430 and 316 stainless steel pipes lies in their composition and properties. 430 stainless steel is a ferritic stainless steel that contains chromium, which gives it good corrosion resistance. However, it is not as resistant to corrosion as 316 stainless steel. It also has lower nickel content compared to 316 stainless steel. On the other hand, 316 stainless steel is an austenitic stainless steel that contains both chromium and nickel. It has excellent corrosion resistance, making it suitable for various applications, including marine environments, where it is exposed to saltwater and other corrosive substances. It also has higher tensile strength and creep resistance compared to 430 stainless steel. In terms of appearance, 430 stainless steel has a dull, brushed finish, while 316 stainless steel has a bright, reflective finish. Considering these differences, the choice between 430 and 316 stainless steel pipes depends on the specific application and the level of corrosion resistance required.

Q: How do stainless steel pipes compare to nickel alloy pipes?: Stainless steel pipes are generally more cost-effective and widely available, while nickel alloy pipes offer superior resistance to corrosion and high temperatures. The choice between the two depends on specific application requirements and budget constraints.

Q: What is the difference between 304J1 and 316J1 stainless steel pipes?: The chemical composition and presence of certain elements distinguish 304J1 stainless steel pipes from 316J1 stainless steel pipes. 304J1 stainless steel is a variation of the well-known 304 stainless steel grade. It possesses a lower carbon content than regular 304, granting it increased resistance to intergranular corrosion. This is achieved by incorporating a small amount of titanium into the composition. 304J1 stainless steel pipes are suitable for a wide range of applications, including plumbing, food processing, and architectural uses. On the other hand, 316J1 stainless steel is a variation of the 316 stainless steel grade. It shares similarities with regular 316 stainless steel in terms of corrosion resistance, but it has a lower carbon content, similar to 304J1. Additionally, 316J1 contains a small amount of molybdenum, which enhances its resistance to pitting and crevice corrosion in chloride environments. As a result, 316J1 stainless steel pipes are commonly employed in marine environments, chemical processing plants, and other scenarios where exposure to corrosive substances is anticipated. To summarize, the primary disparity between 304J1 and 316J1 stainless steel pipes lies in their chemical composition, with the latter offering superior corrosion resistance in more aggressive environments. The selection between the two would hinge on the specific application and the desired level of corrosion resistance.

Q: What is the difference between nominal size and actual size in stainless steel pipes?: The distinction between nominal size and actual size in stainless steel pipes lies in their measurement and labeling methods. Nominal size refers to the assigned name of a pipe based on its approximate dimensions, typically in inches or millimeters. This name serves the purpose of easy identification and standardization. In contrast, actual size refers to the precise measurements of the pipe, including its outer diameter (OD) and wall thickness. These measurements are usually expressed in fractions of an inch or millimeters. The accurate dimensions are vital for determining the pipe's compatibility with fittings, valves, and other components, as well as for calculating flow rates and pressure ratings. It is important to acknowledge that the nominal size of a stainless steel pipe may not always align with its actual size. This discrepancy arises from historical factors and manufacturing practices. In certain instances, the nominal size may be slightly larger or smaller than the actual size to account for variations in wall thickness or to conform to industry standards. Therefore, when selecting stainless steel pipes, it is crucial to consider both the nominal size and the actual size to ensure proper fit and functionality. Referring to the manufacturer's specifications or seeking professional advice can aid in determining the appropriate pipe size for a specific application.

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