LSAW Steel Pipes are known for their strength and durability. They are designed to withstand high-pressure applications and are suitable for transporting various fluids, gases, and solids. LSAW Pipes are commonly used in industries such as oil and gas, petrochemical, water supply, construction, and more.Here are some technical parameters related to Longitudinal Submerged Arc Welded (LSAW) steel pipes:

1. Pipe Diameter: The diameter of an LSAW steel pipe refers to its outer diameter (OD). LSAW pipes are commonly available in a wide range of diameters, ranging from a few inches to several feet, depending on the application requirements.

2. Wall Thickness: The wall thickness of an LSAW steel pipe refers to the thickness of the pipe's cylindrical wall. It is usually measured in millimeters (mm) or inches (in). LSAW pipes are available in various wall thicknesses to accommodate different pressure and structural requirements.

3. Grade of Steel: LSAW pipes are manufactured using different grades of steel, which determine their mechanical properties and suitability for specific applications. Commonly used steel grades for LSAW pipes include API 5L (e.g., X42, X52, X60, etc.), ASTM A53, ASTM A106, and more. The specific grade is selected based on factors such as intended use, environmental conditions, and required mechanical properties.

4. Length: LSAW pipes are typically produced in standard lengths, commonly ranging from 6 meters (20 feet) to 12 meters (40 feet). However, they can also be produced in custom lengths to meet specific project requirements.

5. Coating and Surface Treatment: LSAW pipes can be coated or treated on their external surface to enhance corrosion resistance and durability. Common coating options include fusion-bonded epoxy (FBE), 3-layer polyethylene (3LPE), 3-layer polypropylene (3LPP), and others. The choice of coating depends on factors such as the environment in which the pipes will be used and the level of corrosion protection required.

6. Welding Method: LSAW pipes are characterized by their longitudinal seam weld, which is created by submerged arc welding. The welding process involves the use of a submerged arc welding machine, which fuses the edges of the steel plate to form a continuous weld along the length of the pipe.

7. Quality Standards: LSAW steel pipes are manufactured in accordance with various international standards to ensure quality and performance. Common standards include API 5L, ASTM A53, ASTM A106, EN 10219, and others. These standards define requirements for dimensions, tolerances, mechanical properties, testing, and other aspects of LSAW pipe production.

8. Steel Plate Thickness: LSAW pipes are made from steel plates that are rolled and formed into a cylindrical shape. The thickness of the steel plates used in LSAW pipe manufacturing can vary based on the pipe's diameter, grade of steel, and application requirements.

9. Pipe End Types: LSAW pipes can have different types of ends to facilitate connection and installation. Common types include plain ends, beveled ends, and threaded ends. The choice of pipe end type depends on the specific application and the method of joining or connecting the pipes.

10. Joint Efficiency: The joint efficiency of an LSAW pipe refers to the strength and integrity of the weld joint. It is typically expressed as a percentage and indicates the efficiency of the welded joint compared to the base material. Joint efficiency is an important factor in determining the overall strength and performance of the LSAW pipe.

11. Non-Destructive Testing (NDT): LSAW pipes undergo various non-destructive testing methods to ensure their quality and integrity. These tests may include ultrasonic testing (UT), radiographic testing (RT), magnetic particle testing (MT), dye penetrant testing (PT), and visual inspection. NDT helps identify any defects or discontinuities in the weld and ensures that the LSAW pipes meet the required standards and specifications.

12. Tensile Strength and Yield Strength: The tensile strength and yield strength are mechanical properties of the LSAW pipe that indicate its ability to withstand axial forces and loads. Tensile strength refers to the maximum stress the pipe can withstand before fracturing, while yield strength represents the stress at which permanent deformation begins.

13. Dimensional Tolerances: LSAW pipes are manufactured to specific dimensional tolerances to ensure uniformity and accuracy. These tolerances define the permissible deviations in terms of pipe diameter, wall thickness, length, and other dimensions. They ensure that the LSAW pipes meet the required specifications and can be properly fitted and installed.

14. Pressure Rating: LSAW pipes are designed to handle different pressure levels depending on the application. The pressure rating specifies the maximum pressure that the pipe can safely withstand without failure. It is essential to select LSAW pipes with an appropriate pressure rating to ensure the safe and reliable operation of the system.

15. Internal Coating: In certain applications, LSAW pipes may require internal coating to protect against corrosion or to meet specific project requirements. Internal coatings can include materials such as epoxy, polyurethane, or cement mortar lining, which provide a protective barrier against corrosive fluids or gases flowing through the pipe.

16. External Protection: LSAW pipes often require external protection to prevent corrosion and damage from environmental factors. This can include external coatings such as fusion-bonded epoxy (FBE), polyethylene (PE), polypropylene (PP), or other corrosion-resistant materials. These coatings provide a protective layer to the external surface of the pipe.

17. Pipe Weight: The weight of an LSAW pipe is determined by its size, wall thickness, and length. Pipe weight is a crucial parameter for transportation, handling, and installation considerations, as it affects the logistics and structural requirements for supporting the pipe.

18. Bend Radius: LSAW pipes have a specified bend radius, which indicates the minimum radius at which the pipe can be safely bent without causing damage or compromising its structural integrity. The bend radius is determined by the pipe diameter, wall thickness, and material properties.

19. Impact Resistance: LSAW pipes may be required to possess certain impact resistance properties, especially in applications where the pipe may be subjected to external impacts or loading. The impact resistance is determined by the material properties and the design of the pipe.

20. Weld Seam Quality: The quality of the weld seam in LSAW pipes is critical for ensuring structural integrity and performance. The weld seam undergoes inspection and testing to ensure proper fusion, absence of defects (such as cracks or voids), and adherence to specified standards and acceptance criteria.

21. Heat Treatment: LSAW pipes may undergo heat treatment processes, such as normalization or stress relieving, to enhance their mechanical properties and relieve residual stresses resulting from the welding process. Heat treatment can help improve the pipe's strength, toughness, and dimensional stability.

22. Straightness: Straightness refers to the deviation of the LSAW pipe from a perfectly straight line. It is an important parameter, especially for long-distance pipelines or applications where precise alignment is required. Straightness is typically specified as a maximum allowable deviation from a straight line over a specified length of the pipe.

23. Deflection: Deflection refers to the bending or flexing of the LSAW pipe under external loads or pressure. It is important to consider the deflection characteristics of LSAW pipes, especially in applications where the pipes are subjected to varying loads, such as buried pipelines or structural supports.

24. Hydrostatic Testing: LSAW pipes often undergo hydrostatic testing, which involves filling the pipe with water or another suitable test medium and applying pressure to assess its strength and integrity. Hydrostatic testing helps identify any leaks, defects, or weaknesses in the pipe before it is put into service.

25. Welding Procedures: LSAW pipe manufacturing involves specific welding procedures to ensure the quality and reliability of the weld joint. Welding procedures include parameters such as welding current, voltage, travel speed, preheating, and interpass temperature. These procedures are developed and qualified to meet the required standards and specifications.

26. Dimensional Accuracy: LSAW pipes are manufactured to meet specific dimensional accuracy requirements. This includes parameters such as roundness, out-of-roundness, ovality, and diameter tolerance. Dimensional accuracy ensures the proper fit and compatibility of the LSAW pipes with other components or fittings in the system.

27. Corrosion Allowance: Corrosion allowance refers to the additional wall thickness added to LSAW pipes to compensate for potential corrosion over the service life of the pipe. The corrosion allowance is typically based on factors such as the expected corrosion rate, the design life of the pipe, and the corrosive environment in which the pipe will be operating.

These technical parameters provide further details regarding the characteristics and considerations associated with LSAW steel pipes. It's important to consult the relevant standards, project specifications, and engineering guidelines specific to your application to ensure the appropriate selection, manufacturing, and installation of LSAW pipes.