The Longitudinal Submerged Arc Welded pipes are made using the submerged arc welding method for manufacturing large-diameter steel pipes used in various applications such as pipeline transportation, oil and gas transmission, and structural support. These pipes are made from various grades of steel that are capable of withstanding high pressure, corrosion, and temperature.

The commonly used steel grades for LSAW pipes:

1. API 5L Grade B: This grade is the most commonly used steel grade for LSAW pipes. It is suitable for pipeline transportation of oil, gas, and water.

2. API 5L X52: This grade is used for transporting natural gas, oil, and water. It has a higher strength than Grade B and is suitable for offshore applications.

3. API 5L X65: This grade is commonly used for pipelines that transport oil, gas, and water in harsh conditions. It has high strength and excellent resistance to corrosion and is ideal for offshore applications.

4. ASTM A252 Grade 3: This grade is commonly used for manufacturing LSAW pipes for structural support in construction and civil engineering projects. It has high strength and resistance to corrosion and is ideal for pile driving and bridge construction.

5. ASTM A671 Grade CC60 and CC65: These grades are used for manufacturing LSAW pipes for low-temperature applications such as cryogenic storage and transportation. They have high impact strength and toughness at low temperatures.

6. ASTM A139 Grade A, B, and C: These grades are used for manufacturing LSAW pipes for use in water wells, oil and gas wells, and geothermal applications. They have high strength and resistance to corrosion and are suitable for both shallow and deep wells.

The production process of LSAW pipe:

1. Plate Preparation: The first step in the production process is the preparation of the steel plates. The plates are carefully inspected for any defects, and any defective plates are rejected. The plates are then cleaned and flattened to ensure they are ready for the welding process.

2. Forming: Once the plates are prepared, they are bent into the shape of a pipe using a bending machine. The edges are then trimmed using a cutting machine to ensure they are straight and smooth.

3. Welding: The plates are then welded using the submerged arc welding process. This involves feeding a wire electrode into the joint, which creates an arc that melts the edges of the plates. The molten material then solidifies and creates a strong weld.

4. Heat Treatment: After the welding is complete, the pipe is subjected to a heat treatment process. This involves heating the pipe to a specific temperature and holding it at that temperature for a certain period of time. This helps to relieve any stresses in the pipe and ensures it is strong and durable.

5. Finishing: Once the heat treatment is complete, the pipe is inspected for any defects. If any defects are found, they are corrected before the pipe is painted and coated with a protective layer to prevent corrosion.

6. Inspection: The final step in the production process is the inspection of the finished product. The pipe is inspected for any defects, such as cracks or deformities, and it is tested to ensure it meets the required specifications.

List the common applications of LSAW pipe:

1. Oil and gas transportation: LSAW pipe is commonly used in the transportation of oil and gas due to its high durability and strength. It can withstand high pressure and extreme weather conditions, making it an ideal choice for pipelines.

2. Construction and building: LSAW pipe is also widely used in civil engineering and construction projects. It is commonly used for building structures, such as bridges, tunnels, and other large-scale constructions.

3. Water supply and drainage: LSAW pipe is also commonly used in water supply and drainage systems. It can handle large volumes of water and sewage, and is resistant to corrosion, making it a reliable option for long-term use.

4. Mechanical engineering: LSAW pipe is also used in a variety of mechanical engineering applications, such as power plants and industrial equipment. It is an excellent choice for conveying materials and fluids in these settings due to its high strength and durability.

5. Agriculture: LSAW pipe is also used in agriculture for large-scale irrigation systems. This type of pipe can withstand high water pressures and is resistant to corrosion, making it an ideal option for harsh agricultural environments. 

Notable features of the LINE PIPE LSAW API 5L PSL1:

durability, strength, and reliability, making it an excellent choice for a wide range of projects.

1)high level of resistance to corrosion. This makes it ideal for use in harsh environments, such as offshore drilling rigs and pipeline systems. Additionally, the pipe is able to withstand high levels of stress and pressure, which is essential in many industries.

2)its ability to handle a wide range of temperatures. It can be used in both high and low-temperature applications, allowing it to be used in a variety of industries, from oil and gas to chemical manufacturing.

3)highly customizable, allowing it to be tailored to meet the specific needs of each project. It can be made in a variety of sizes and thicknesses, making it suitable for everything from small-scale projects to larger industrial applications.

Overall, the LINE PIPE LSAW API 5L PSL1 is a top-quality pipe that offers a range of benefits and features. It is an excellent choice for those looking for a durable, reliable, and customizable pipe that can be used in a wide range of applications.

Steel grades of API 5L PSL1:
- API 5L Grade A - 30,000 psi minimum yield strength and 45,000 psi minimum tensile strength
- API 5L Grade B - 35,000 psi minimum yield strength and 60,000 psi minimum tensile strength
- API 5L Grade X42 - 42,000 psi minimum yield strength and 60,000 psi minimum tensile strength
- API 5L Grade X46 - 46,000 psi minimum yield strength and 63,000 psi minimum tensile strength
- API 5L Grade X52 - 52,000 psi minimum yield strength and 66,000 psi minimum tensile strength
- API 5L Grade X56 - 56,000 psi minimum yield strength and 71,000 psi minimum tensile strength
- API 5L Grade X60 - 60,000 psi minimum yield strength and 75,000 psi minimum tensile strength
- API 5L Grade X65 - 65,000 psi minimum yield strength and 77,000 psi minimum tensile strength
- API 5L Grade X70 - 70,000 psi minimum yield strength and 82,000 psi minimum tensile strength

Each steel grade offers different properties and is suited for different applications. It is important to choose the appropriate steel grade based on the intended use and the specific requirements of the project.  CONTACT : liana@lefinsteel.com      tel: 0086 137 5250 5280

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