ASTM A252 lsaw steel pipe

ASTM A252 LSAW steel pipe

ASTM A252 is the standard specification for welded and seamless steel pipe piles, especially for steel pipe piles in civil engineering and structural applications. The standard provides clear specifications for the material, grade, production process and application of the steel pipe, ensuring the reliability and applicability of the material.

1. Material and grade

According to ASTM A252, the main materials and grades of LSAW steel pipes are as follows:
Material: LSAW steel pipe usually uses low alloy carbon steel, the main components include: carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si)

Grades: ASTM A252 defines three different grades as follows:
Grade 1:
Suitable for the occasion of relatively low strength requirements.
Grade 2:
The most commonly used grade, suitable for most applications.
Grade 3
Usage: Used for high load engineering, suitable for higher strength applications.


Mechanical properties:
Tensile Strength:
Grade 1:50,000 psi (345MPa)
Grade 2:60,000 psi (415 MPa)
Grade 3:66,000 psi (455 MPa)

Yield Strength:
Grade 1:30,000 psi (205 MPa)
Grade 2:35,000 psi (240 MPa)
Grade 3:45,000 psi (310 MPa)

2. Material requirements:

The chemical composition and mechanical properties of ASTM A252 steel tubes ensure that they provide sufficient strength and durability when used in high-pressure and high-load environments.

3. Application field

ASTM A252 LSAW steel pipes are widely used in many fields, including:
Civil Engineering: As a pile foundation, LSAW steel pipes provide good load carrying capacity to support the weight of buildings or other structures. It is suitable for various soil conditions and can effectively resist soil side pressure and settlement.

Bridge construction: The main load-bearing components used in Bridges provide the necessary strength and rigidity. Because of its superior compressive resistance and corrosion resistance, it is suitable for the main beam and pile foundation of Bridges.

Oil and gas pipelines: Under certain conditions, ASTM A252 steel pipes can be used in buried oil and gas pipelines to ensure safety and durability. It can resist internal and external corrosion to ensure the safety of transportation.

Hydraulic engineering: Used for structural support of DAMS, drainage systems and other water conservancy facilities. Strong corrosion resistance, can be exposed to water for a long time without losing strength.

Building structure: As the support structure of the building, providing the necessary strength and stability. It is suitable for the frame structure of high-rise buildings and industrial plants to ensure the overall safety and durability.

4. Production process

LSAW steel pipe production mainly adopts longitudinal submerged arc welding process, the specific process includes:
Raw material preparation: Select qualified steel coil, cut and form.
Welding: The submerged arc welding process is used to weld the edge of the steel coil to ensure the quality of the welded joint.
Heat treatment: Heat treatment of the welded steel pipe to eliminate welding stress and improve the toughness of the material.
Surface treatment: According to application requirements, anti-corrosion coating treatment to improve durability.


In summary:

ASTM A252 LSAW steel pipe with its superior material properties and a wide range of applications, for the construction and engineering industry to provide a reliable solution to ensure the safety and effectiveness of all types of projects.