STAINLESS STEEL LARGE DIAMETER PIPE

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1. Guaranteed material from established steel factories
2. Accordance with International standard
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PRODUCT NAME: STAINLESS STEEL LARGE DIAMETER PIPE

Name	STAINLESS STEEL LARGE DIAMETER PIPE
Standard	ASTM, GB, JIS, DIN, EN, AISI
Material Grade	TP304 TP304L TP316 TP316L TP347 TP347H TP321 TP321H TP310 TP310S
	TP410 TP410S TP403
	S31803/S32205 S32750 S32760
Outer Diameter	Welded Pipe: single slit(Φ8mm-Φ630mm); girth(Φ630mm-Φ3000mm),
Thickness	Welded Pipe: single slit(0.5mm-25mm); girth(3mm-30mm)
Length	Commonly 5.8 Meters or 6.0 Meters, or as customers' request
Tolerance	According to the Standard, +/-10% Commonly.
Surface	180#, 320#, 400# Satin / Hairline, Bright Anneal, Pickle,400#, 500#, 600# or 800# Mirror finish
Application	Petrochemical industry, chemical fertilizer industry, oil refining industry, oil and gas industry, light industry and food industry, pulp and paper industry, energy and environmental industries.
Test	Flaring test, Flattening test, Bending Test, Hydraulic Test, Eddy Current test

Q: What is the difference between bright annealed and annealed pickled stainless steel pipes?: There are two distinct surface finishes for stainless steel pipes: bright annealed and annealed pickled. Bright annealed pipes undergo annealing, a process that entails heating the pipes to a precise temperature and gradually cooling them. This technique alleviates inner tensions, enhances the steel's ductility, and improves its resistance to corrosion. Following annealing, the pipes are subjected to a bright annealing process. This involves heating the pipes at a high temperature in a controlled atmosphere, followed by rapid cooling. As a result, the pipes acquire a sleek, lustrous, and reflective surface finish. On the contrary, annealed pickled stainless steel pipes also undergo annealing to enhance their properties. However, these pipes undergo pickling after annealing. Pickling involves immersing the pipes in an acidic solution, such as hydrochloric or sulfuric acid, to eliminate any scale, oxides, or impurities present on the steel's surface. This procedure aids in cleaning and purifying the surface, resulting in a subdued, matte finish on the pipes. In conclusion, the primary distinction between bright annealed and annealed pickled stainless steel pipes lies in their surface finishes. Bright annealed pipes possess a smooth, lustrous, and reflective finish, while annealed pickled pipes exhibit a dull, matte finish. The selection between these two finishes is contingent upon the specific requirements and aesthetics of the application.

Q: Can stainless steel pipes be used for underground gas pipelines?: Indeed, underground gas pipelines can utilize stainless steel pipes due to their remarkable resistance to corrosion. This characteristic renders stainless steel pipes exceptionally suitable for subterranean applications where exposure to moisture, soil, and other corrosive factors is inevitable. Moreover, stainless steel boasts outstanding mechanical properties, such as remarkable tensile strength and durability, which enable it to endure the demanding conditions and pressure prerequisites of gas pipelines below the surface. Furthermore, stainless steel pipes are renowned for their longevity and minimal maintenance needs, resulting in a cost-effective option for underground gas pipelines. Nevertheless, it is imperative to adhere to industry standards and regulations, as well as implement proper installation and maintenance methodologies, to guarantee the secure and efficient operation of gas pipelines.

Q: What are the different types of stainless steel pipe connections?: Various applications commonly utilize different types of stainless steel pipe connections. Some of the most frequently used types are as follows: 1. Threaded Connections: These connections involve joining two pipes with matching threads by screwing them together. They are typically employed for smaller pipe sizes and applications with low pressure. 2. Socket Weld Connections: In this type of connection, the pipe is inserted into a socket and then welded around the joint. Socket weld connections are primarily used for smaller pipe sizes and applications with high pressure. 3. Butt Weld Connections: Butt weld connections entail welding the ends of two pipes together. They are commonly employed for larger pipe sizes and applications with high pressure. 4. Flanged Connections: Flanged connections involve connecting two pipes by attaching a flange to each end. The flanges are then secured by bolts to create a strong joint. Flanged connections are frequently used for larger pipe sizes and applications that require easy disassembly. 5. Compression Connections: Compression connections utilize a compression fitting to connect two pipes. This type of connection is particularly useful for applications that require frequent disassembly and reassembly. 6. Grooved Connections: Grooved connections involve using grooved fittings to connect two pipes. The grooves on the fittings align with grooves on the pipes, and a gasket is inserted to create a seal. Grooved connections are commonly utilized in fire protection systems and industrial piping. Each type of stainless steel pipe connection offers its own advantages and disadvantages. The selection of the appropriate connection type depends on the specific requirements of the application, taking into account factors such as pressure, temperature, pipe size, and ease of installation.

Q: Are stainless steel pipes suitable for chemical reactors?: Indeed, chemical reactors find stainless steel pipes to be a fitting choice. Stainless steel, known for its exceptional durability and resistance to corrosion, proves itself as an optimal material for managing a wide range of chemicals and corrosive substances. It exhibits remarkable resistance to both extreme hot and cold temperatures, as well as protection against oxidation and scaling. Stainless steel pipes demonstrate their ability to endure the harsh conditions within a chemical reactor, including aggressive chemicals and high pressure. Furthermore, they boast an effortless cleaning and maintenance process, guaranteeing the integrity and longevity of the chemical reactor system. Ultimately, stainless steel pipes offer a dependable and secure solution for the transportation of chemicals in chemical reactors.

Q: Can stainless steel pipes be used for compressed air systems?: Yes, stainless steel pipes can be used for compressed air systems. Stainless steel pipes have a high resistance to corrosion, which makes them suitable for applications where compressed air is used. They can withstand high pressure levels and provide reliable and leak-free operation. Additionally, stainless steel pipes are durable and long-lasting, ensuring that the compressed air system remains efficient and functional over time. However, it is important to consider the specific requirements of the compressed air system and consult with professionals to ensure that the stainless steel pipes are appropriately sized and installed to meet the system's needs.

Q: How do you cut stainless steel pipes?: Stainless steel pipes can be cut using a variety of methods such as using a hacksaw, a reciprocating saw with a metal-cutting blade, or a pipe cutter specifically designed for stainless steel. It is important to choose the appropriate tool and blade for the job, ensuring a clean and precise cut without damaging the pipe's integrity.

Q: What is the difference between Schedule 5 and Schedule 10 stainless steel pipes?: The main difference between Schedule 5 and Schedule 10 stainless steel pipes lies in their wall thickness. Schedule 5 stainless steel pipes have a thinner wall compared to Schedule 10 pipes. This difference in thickness affects their respective pressure ratings and applications. Schedule 5 pipes are suitable for low-pressure applications, while Schedule 10 pipes are designed for higher-pressure environments.

Q: Can stainless steel pipes be insulated with polyurethane?: Certainly! Polyurethane insulation is frequently utilized in multiple industries, such as plumbing and HVAC systems, for both thermal and acoustic insulation. Its outstanding thermal conductivity properties and minimal moisture absorption make it an excellent option for insulating stainless steel pipes. There are two methods to apply polyurethane insulation: as a foam or in pre-insulated pipe sections. By minimizing heat loss or gain, avoiding condensation, and enhancing energy efficiency, it effectively insulates the pipes. Moreover, polyurethane insulation is long-lasting, lightweight, and corrosion-resistant, making it a suitable choice for insulating stainless steel pipes in diverse applications.

Q: Can stainless steel pipes be coated?: Stainless steel pipes have the capability to undergo coating procedures. Coating these pipes serves multiple purposes, such as bolstering their durability, preventing corrosion, providing insulation, and enhancing their aesthetics. There exist diverse options for coating stainless steel pipes, including epoxy coatings, polyurethane coatings, and fusion-bonded epoxy coatings. These coatings are applied to the surface of the stainless steel pipes using various techniques, such as spraying, dipping, or electrophoretic deposition. The selection of the appropriate coating relies on the specific requirements of the application and the environment in which the pipes will be utilized. By coating stainless steel pipes, their lifespan can be significantly extended and their performance can be improved, making them suitable for a wide range of industries including oil and gas, chemical, water treatment, and construction.

Q: Can stainless steel pipes be lined with polyethylene?: Yes, stainless steel pipes can be lined with polyethylene. Lining stainless steel pipes with polyethylene is a common practice in various industries, including oil and gas, chemical processing, and water distribution. The polyethylene lining provides several benefits such as corrosion resistance, increased flow capacity, reduced friction, and improved resistance to chemicals. This lining process involves inserting a polyethylene liner into the stainless steel pipe and then heating and expanding it to create a tight fit. This lining technique is effective for protecting the stainless steel pipes from corrosion and extending their lifespan.

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