API 5L X52 PSL2 seamless steel pipe is a high-strength, low-alloy steel pipe that is designed for use in the transportation of oil, gas, and other fluids. It is manufactured using a seamless process, which produces a pipe with a smooth inner and outer surface. The following are the physical features of API 5L X52 PSL2 seamless steel pipe:

1. Tensile strength: API 5L X52 PSL2 seamless steel pipe has a minimum tensile strength of 66,700 psi (460 MPa).

2. Yield strength: API 5L X52 PSL2 seamless steel pipe has a minimum yield strength of 52,200 psi (360 MPa).

3. Elongation: The minimum elongation of API 5L X52 PSL2 seamless steel pipe is 21%.

4. Hardness: The maximum hardness of API 5L X52 PSL2 seamless steel pipe is 95 HRB.

5. Impact resistance: API 5L X52 PSL2 seamless steel pipe has good impact resistance at low temperatures.

6. Corrosion resistance: API 5L X52 PSL2 seamless steel pipe has good corrosion resistance in acidic and alkaline environments.

commonly used standards of SEAMLESS STEEL PIPE

1. ASTM A106 - This seamless carbon steel pipe standard is widely used in high-temperature applications and is preferred for its excellent mechanical properties and weldability.

2. ASTM A53 - This standard covers black and hot-dipped galvanized seamless steel pipes of various grades and sizes. It is commonly used in water, oil, and gas transportation industries.

3. API 5L - This standard specifies the requirements for seamless and welded steel pipes for use in the oil and gas industry. It covers various grades and sizes, and ensures the safe transportation of petroleum fluids.

4. DIN 17175 - This standard specifies the technical delivery conditions for seamless steel pipes for elevated temperatures. It is widely used in the chemical and petrochemical industries.

5. JIS G3454/3455/3456 - These standards cover carbon and alloy steel pipes for pressure service and for high-temperature service. They are widely used in various industries in Japan and the Asia-Pacific region.liana@lefinsteel.com      tel: 0086 137 5250 5280

Square &Rectangular seamless steel pipes

1. ASTM A500: This standard specifies the requirements for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes.

2. ASTM A106: This standard covers seamless carbon steel pipes for high-temperature service.

3. JIS G3466: This standard specifies the square and rectangular hollow sections used for structural purposes.

4. EN 10210: This standard specifies the technical delivery conditions for hot-finished hollow sections of circular, square, rectangular, and elliptical forms.

5. GB/T 3094: This standard specifies cold-drawn shaped steel tubes.

6. DIN 2391: This standard specifies the technical delivery conditions for seamless precision steel tubes.

the most common applications of seamless steel pipe:

1. Oil and gas industry: Seamless steel pipes are used in the exploration, production, and transportation of oil and gas. The pipes are ideal for conveying fluids under high pressure and temperature conditions.

2. Automotive industry: Seamless steel pipes are used in the manufacturing of automotive components such as exhaust systems, suspension systems, and structural frames. The pipes provide high strength and durability, making them ideal for these applications.

3. Construction industry: Seamless steel pipes are used in the construction of buildings and infrastructure such as bridges, tunnels, and roads. The pipes are used for water and gas pipelines, heating systems, and structural support.

4. Aerospace industry: Seamless steel pipes are used in the aerospace industry for their strength and reliability. They are used in the construction of aircraft and spacecraft components such as engine parts, hydraulic systems, and landing gear.

5. Marine industry: Seamless steel pipes are used in the marine industry to transport fluids and gases around ships and offshore installations. They are also used in the construction of ship hulls, decks, and bulkheads.

seamless steel pipes are highly versatile and can be used in a wide range of applications. They provide reliability, durability, and strength, which makes them ideal for demanding environments such as the oil and gas industry, construction, aerospace, and marine applications.

the difference production process of square and round SEAMLESS STEEL PIPE

Round seamless steel pipes are produced using a piercing machine and a hot-rolled steel pipe. The steel pipe is placed in the piercing machine, which has a conical mandrel that is slowly pushed through the steel pipe, forming a hollow pipe. The seamless pipe is then put through a series of other processes, such as sizing, reducing, and finishing. Round seamless steel pipes are widely used in industries such as petroleum, chemical, power, and gas.

Square &Rectangular seamless steel pipes are made by using a piercing machine, which cuts the steel plate into a desired shape. The steel plate is then rolled into a cylindrical shape, and the edges are welded together to form a square-shaped pipe. After welding, the pipe goes through sizing, reducing, and finishing processes. Square seamless steel pipes are often used in construction, machinery, and other industries.liana@lefinsteel.com      tel: 0086 137 5250 5280

Both round and square seamless steel pipes have their own unique advantages and disadvantages. Round seamless steel pipes have excellent performance in high-pressure environments, while square seamless steel pipes are more flexible in terms of shape and are easier to weld. However, the production process of the two types of seamless steel pipes are similar, with both requiring piercing, sizing, reducing, and finishing processes to be completed.

In conclusion, the production process of square and round seamless steel pipes differ slightly, but both types of pipes are essential components in various industries. Both types of seamless steel pipes have their own unique uses and advantages, and both are important for the development and progress of society.