ASTM A269 Seamless Stainless Steel Pipe

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 1000 m.t./month

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Quick Details

Standard:	JIS,AISI,ASTM,DIN,EN	Place of Origin:	China (Mainland)	Brand Name:	OKORDER
Model Number:	stainless steel pipe	Type:	Seamless	Steel Grade:	300 Series
Application:	stainless steel pipe	Certification:	ISO	Thickness:	1-30
Outer Diameter:	6-530	Quality:	good stainless steel pipe	Brand:	stainless steel pipe

Packaging & Delivery

Packaging Detail:	polywood box
Delivery Detail:	35days

Specifications

ASTM A269 Seamless Stainless Steel Pipe:
Outside diameter from 6mm to 530mm.
Wall thickness from 0.5mm to 38.1mm.

ASTM A269 Seamless Stainless Steel Pipe

1. Material	TP304/304L, 316/316L, 310S, 317L, 321, 347H,etc.
1. Material	S31803, 32750, etc.
2. Standard	ASTM, ASME, DIN, EN, ISO,JIS, GOST, etc.
3. Type	Seamless
4. Size range	OD: from 6mm to 1000mm (NPS from 1/8'' to 40'')
	WT: from 0.7mm to 38mm (Schedule from 5S to XXS)
	Length: fix length or un-fix length, Max 30meters
5. Produce process	Pilgering and cold drawn
6. Surface process	Pickling and annealing
	AP tube
	BA tube
7. Marking	JW, GRADE, seamless, STANDARD, SIZE, HT NO.
8. Package	Bundles with waterproof cloth outside.
8. Package	or plywood box.
9. Min order quantity	500 KG
10. Sample	Yes
11. OEM accepted	Yes
12. Production capacity	300 tons per month
13. Payment term	T/T or L/C.
14. Certificate	ISO 9001, PED
15. Third party ertificate	BV, LR, SGS, TUV, CCS, ABS, etc.

Q: What is the difference between 304H and 304L stainless steel pipes?: The main difference between 304H and 304L stainless steel pipes lies in their carbon content. 304H stainless steel pipes have a higher carbon content, typically around 0.04-0.10%, which makes them suitable for high-temperature applications. This higher carbon content provides improved high-temperature strength and resistance to sensitization, which is the formation of chromium carbides at grain boundaries, leading to reduced corrosion resistance. On the other hand, 304L stainless steel pipes have a lower carbon content, usually around 0.03%, which makes them more suitable for welding applications. The lower carbon content helps to minimize the formation of chromium carbides, thus reducing the risk of sensitization during welding. This results in improved corrosion resistance and enhanced weldability. In summary, while both 304H and 304L stainless steel pipes are variants of the 304 grade, the difference lies in their carbon content. 304H pipes are preferred for high-temperature applications due to their higher carbon content and improved high-temperature strength, while 304L pipes are more suitable for welding applications due to their lower carbon content and enhanced weldability.

Q: How can the inner walls of stainless steel tubes be polished?: Electropolishing is thrown to the workpiece as anode, insoluble metal poles at the same time as the cathode, immersed into electrolytic cell, with the direct current produced anodic dissolution selectively, so as to achieve the surface brightness increasing effect. Specific can be used to search "what is electrolytic polishing" can understand!

Q: What is the difference between ERW and EFW stainless steel pipes?: Stainless steel pipes can be manufactured using two different methods: ERW (Electric Resistance Welded) and EFW (Electric Fusion Welded). The primary distinction between these two methods is in the welding process employed. In the case of ERW stainless steel pipes, a flat sheet of steel is rolled into a cylindrical shape and then joined together at the edges using a high-frequency electrical current. This process yields a seamless and robust joint, ensuring the pipe's resistance to corrosion and a smooth interior surface. ERW pipes find extensive use in industries such as oil and gas, where durability and strength are crucial. In contrast, EFW stainless steel pipes are produced by melting the edges of two steel pieces together under the application of heat and pressure. This fusion welding process creates a continuous weld throughout the entire length of the pipe, eliminating the need for additional welding. EFW pipes are renowned for their exceptional corrosion resistance and are commonly utilized in environments characterized by high pressure and temperature, such as chemical plants and power generation facilities. To summarize, the primary distinction between ERW and EFW stainless steel pipes lies in the welding process. ERW pipes are formed by welding the edges of a flat sheet, whereas EFW pipes are created by fusing the edges of two steel pieces. Both methods offer distinct advantages and find application in different industries depending on the specific project requirements.

Q: How do you prevent stainless steel pipes from corroding?: There are several measures that can be taken to prevent corrosion in stainless steel pipes: 1. The selection of the appropriate grade of stainless steel is crucial. Each grade has varying levels of corrosion resistance, so it is important to choose a grade that is suitable for the specific environment in which the pipes will be used. For environments that are more corrosive, it is recommended to use higher grades such as 316 stainless steel. 2. Proper installation and maintenance are essential. Ensuring that the pipes are installed correctly with the appropriate gaskets, seals, and fittings will prevent any gaps or leaks that could allow moisture or corrosive substances to enter. Regular inspections and maintenance should be conducted to identify and repair any damage or potential sources of corrosion. 3. Keeping the pipes clean and dry is important. Regular cleaning will remove any contaminants or corrosive substances that may have accumulated. It is important to avoid using harsh chemical cleaners that can harm the protective oxide layer on the surface of the stainless steel. Additionally, prolonged exposure to water or moisture should be avoided to keep the pipes dry and prevent corrosion. 4. The application of protective coatings can provide an additional layer of protection against corrosion. There are specific coatings or paints designed for stainless steel that act as a barrier, preventing direct contact between the stainless steel and corrosive substances. 5. In highly corrosive environments, cathodic protection can be utilized. This involves the use of sacrificial anodes or impressed current systems to divert the electrical current away from the pipes, thus protecting the stainless steel from corrosion. By following these preventive measures, the risk of corrosion in stainless steel pipes can be significantly reduced, leading to a longer lifespan for the pipes.

Q: Are stainless steel pipes suitable for beer brewing applications?: Yes, stainless steel pipes are highly suitable for beer brewing applications. Stainless steel is corrosion-resistant, ensuring the purity and quality of the beer. It also has excellent heat resistance, making it suitable for various brewing processes such as boiling and fermentation. Additionally, stainless steel is easy to clean and maintain, ensuring hygienic conditions throughout the brewing process.

Q: What are the limitations of using stainless steel pipes?: Some limitations of using stainless steel pipes include their higher cost compared to other materials, their susceptibility to corrosion in certain environments, and their lower thermal conductivity compared to materials like copper. Additionally, stainless steel pipes may be more difficult to cut and weld, and their strength and durability may vary depending on the specific grade of stainless steel used.

Q: Can stainless steel pipes be pickled and passivated?: Stainless steel pipes do have the capability to undergo pickling and passivation. Pickling refers to the elimination of impurities and scale from the surface of the stainless steel, whereas passivation involves applying a protective oxide layer on the surface to improve its resistance to corrosion. Various acidic solutions and techniques are employed in the pickling and passivation process, depending on the specific needs of the pipes and the desired results. This procedure is commonly employed in industries such as oil and gas, chemical, and food processing to ensure the purity and durability of stainless steel pipes.

Q: Can stainless steel pipes be used in marine environments?: Yes, stainless steel pipes can be used in marine environments. Stainless steel is highly resistant to corrosion and rust, making it an ideal material for marine applications. It can withstand the harsh conditions of saltwater, such as high levels of humidity, moisture, and exposure to various chemicals. Stainless steel pipes are commonly used in marine vessels, offshore platforms, and other marine structures due to their durability and long-lasting performance. They provide excellent strength and reliability, even in challenging environments, making them a preferred choice for marine applications.

Q: Are stainless steel pipes suitable for underground installations?: Yes, stainless steel pipes are suitable for underground installations. Stainless steel is highly resistant to corrosion and is known for its durability and strength. It can withstand harsh underground conditions, including moisture, soil movement, and chemical exposure. Stainless steel pipes are also immune to rust and do not require protective coatings, making them ideal for long-term underground use. Additionally, stainless steel pipes have a long lifespan and require minimal maintenance, further enhancing their suitability for underground installations.

Q: What is the difference between satin and brushed finishes in stainless steel pipes?: Stainless steel pipes can undergo two common types of surface treatments: satin and brushed finishes. These finishes enhance the pipes' appearance and provide some level of corrosion resistance, but they have distinct differences. To achieve a satin finish, a smooth, glossy surface is created using a fine abrasive material. This finish is characterized by its reflective and shiny appearance, similar to satin fabric. It gives the stainless steel pipe a sleek and polished look, making it suitable for applications where aesthetics are important. Satin finishes are commonly used in architectural and decorative applications like handrails, furniture, and kitchen appliances. On the other hand, a brushed finish is achieved by creating a pattern of fine lines on the surface using a wire brush or abrasive pad. This finish has a matte appearance with visible parallel lines running across the surface. Brushed finishes are less reflective than satin finishes and offer a more subdued, industrial look. They are commonly used in applications where durability and resistance to visible wear and tear are important, such as machinery, automotive components, and commercial kitchen equipment. While both satin and brushed finishes provide some level of corrosion resistance, it's worth noting that the surface texture of brushed finishes makes them slightly more resistant to visible scratches and scuffs compared to satin finishes. However, it's important to remember that the overall corrosion resistance of stainless steel is primarily determined by its alloy composition, not the surface finish. In summary, the main difference between satin and brushed finishes in stainless steel pipes lies in their appearance and intended use. Satin finishes offer a reflective and polished look suitable for decorative applications, while brushed finishes provide a more matte and industrial appearance for applications that require durability and resistance to visible wear and tear.

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