Seamless Stainless Steel Pipe
Pipe Seamless Stainless Steel
Seamless Pipe
Seamless stainless steel pipe
Stainless Steel Pipe

Seamless Stainless Steel Pipe

Seamless stainless steel pipe refers to a pipe that is manufactured from stainless steel without any welded seams or joints. It is made by extruding a solid stainless steel billet through a piercing rod to create a hollow tube that is then stretched and rolled to achieve the desired size and thickness.

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Product Introduction

Seamless stainless steel pipes are popular in applications where high strength, corrosion resistance, and durability are required, such as in the oil and gas industry and chemical processing. They are also used in automotive, aerospace, and construction industries where precision tubing is essential. Some of the advantages of seamless stainless steel pipes include their excellent corrosion resistance, high temperature strength, and ability to withstand high pressure and stress. They also have a smooth interior surface that prevents build-up of bacteria or impurities, making them suitable for use in hygienic applications such as food and beverage processing.

1. Size Range: Seamless stainless steel pipes are available in a wide range of sizes and dimensions, ranging from 1/8 inch to 24 inches in diameter.

2. Wall Thickness: The wall thickness of the pipe can vary from Schedule 5S to Schedule XXS, depending on the requirements of the application.

3. Material Specification: The most common material specification for seamless stainless steel pipes is ASTM A312/A312M, which covers seamless, welded, and heavily cold worked austenitic stainless steel pipe intended for high-temperature and general corrosive service.

4. Grade: The grade of the stainless steel pipe depends on the application, and some of the commonly used grades include 304/304L, 316/316L, 317/317L, and 321/321H.

5. Heat Treatment: Some stainless steel pipes may require heat treatment to improve their mechanical properties and enhance their resistance to corrosion.

6. End Connections: Seamless stainless steel pipes can have different end connections, such as plain ends, beveled ends, threaded ends, and socket weld ends.

7. Testing and Certification: Seamless stainless steel pipes may undergo various tests, such as hydrostatic testing, ultrasonic testing, and eddy current testing, to ensure their quality and performance. They may also come with a certification of compliance with various standards, such as ASTM and ASME.

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Specification

Common number		ASTM	Mechinical Spefication
			Rm Mpa	Y.S.(Mpa)	A5
201		201	≥520	≥275	≥40
1Cr17Ni7			≥520	≥205	≥205
301		301	≥520	≥205	≥40
1Cr18Ni9			≥520	≥205	≥40
0Cr18Ni9			≥520	≥205	≥40
304		304	≥515	≥205	≥205
00Cr19Ni10			≥480	≥175	≥40
304L		304L	≥485	≥170	≥30
309S		309S	≥520	≥205	≥40
0Cr25Ni20			≥520	≥205	≥40
310S		310S	≥520	≥205	≥40
0Cr17Ni12Mo2			≥520	≥205	≥40
316		316	≥515	≥205	≥30
00Cr17Ni14Mo2			≥480	≥175	≥40
316L		316L	≥485	≥170	≥30
316Ti		316Ti	≥515	≥205	≥30
0Cr19Ni13Mo3			≥520	≥205	≥40
00Cr19Ni13Mo3			≥480	≥177	≥40
317L		317L	≥480	≥176	≥40
0Cr18Ni10Ti			≥520	≥205	≥40
321		321	≥515	≥205	≥30
409L			≥360	≥175	≥25
410		410	≥440	≥205	≥20
430		430	≥450	≥205	≥22
444		444	≥480	≥310	≥30
410S			≥420	≥290	≥33
2205/S31803/F51		2205	≥450	≥620	≥15
2507/S32750/F53		2507	≥550	≥800	≥25
630			≥520	≥785	≥18
904L/N08904			≥490	≥216	≥35
Item	Surface Finishing	Surface Finishing Methods
No.1	HR	Heat treatment after hot rolling, picking, or with treatment
NO.2D	Without the SPM	Method of heat treatment after cold rolling, picking surface roller with wool or eventually a light rolling a matte surface processing
NO.2B	After SPM	Giving No.2 processing materials appropriate method of cold light sheen
BA	Bright annealed	Bright heat treatment after cold rolling, in order to be more shiny, cold light effect
NO.3	Shiny, coarse grain processing	The NO.2D or NO.2B processing timber NO.150-180 polishing abrasive grinding belt
NO.4	After CPL	The NO.2D or NO.2B processing timber No. 150-180 polishing abrasive grinding belt
240#	Grinding of fine lines	The NO.2D or NO.2B processing timber 240 polishing abrasive grinding belt
320#	More than 240 lines of grinding	The NO.2D or NO.2B processing timber 320 polishing abrasive grinding belt
400#	Close to BA luster	The MO.2B timber 400 polishing wheel polishing method
HL (hair lines)	Polishing line having a long continuous processing	In a suitable size (usually mostly No. 150-240 grit) abrasive tape for as long as the hair, having a continuous processing method of polishing line
NO.6	NO.4 processing less than the reflection, the extinction	NO.4 processing material used for polishing Tampico brushing
NO.7	Highly accurate reflectance mirror processing	No. 600 of the rotary buff with a polishing
NO.8	Highest reflectivity mirror finish	Fine particles of abrasive material in order polishing, mirror polishing with a polishing

Application Range

The application range of seamless stainless steel pipes is vast and varied. They are commonly used in the following industries:

1. Petrochemical and chemical processing: These pipes are used to transport various chemicals and gases in refineries and petrochemical plants.

2. Oil and gas industry: Seamless stainless steel pipes are extensively used for drilling, extraction, and transportation of oil and gas.

3. Pharmaceutical industry: These pipes are used in the manufacturing of pharmaceutical products where high purity is required.

4. Food and beverage industry: Seamless stainless steel pipes are used in the food processing industry for the transportation of edible oils, milk products, and other food products.

5. Aerospace and defense: These pipes are used in the manufacturing of aircraft and military equipment.

6. Marine industry: The pipes are used to transport seawater and for other marine applications.

7. Automotive industry: Stainless steel pipes are used in exhaust systems, fuel and brake lines, and other automotive components.

8. Construction industry: These pipes are used in the construction of buildings and bridges, for HVAC systems, and for sanitary applications.

Overall, seamless stainless steel pipes are preferred in applications that require high strength, corrosion resistance, and durability.

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