ASTM-A252 is the basic specification governing seamless and welded steel pipes for piling purposes. They can be used as load-bearing piles or concrete pile enclosures.
A252 pipes are available in three grades:
Grade 1 (minimum yield strength of 30 ksi or 207 MPa);
Grade 2 (minimum yield strength of 35 ksi or 241 MPa);
Grade 3 (minimum yield strength of 45 ksi or 310 MPa).
The strongest Grade 3 is usually the grade for piling projects.
Detailed explanation of ASTM A252 steel cylindrical pipe pile standard
Overview of the standard
The ASTM A252 standard is a standard specification for welded and seamless carbon steel pipe piles developed by the American Society for Testing and Materials (ASTM International). The standard specifies in detail the design, manufacture, and use of steel pipe piles, aiming to ensure the quality, reliability, and safety of steel pipe piles. It is mainly used in foundation projects such as buildings and bridges to provide stable support for these structures.
Scope of application
ASTM A252 standard applies to cylindrical nominal (average) wall steel pipe piles, which can be used as load-bearing members or as shells to form cast-in-place concrete piles. They are mainly used in foundation projects such as buildings and bridges to provide stable support for these structures.
Steel grade classification
The steel pipe piles of this standard are divided into three grades according to the strength level:
Grade 1: has certain strength and toughness, suitable for most conventional foundation engineering applications.
Grade 2: The strength is slightly higher than Grade 1, and it can also meet the needs of general foundation engineering. It is widely used in some ordinary projects with high bearing capacity.
Grade 3: It is a high-strength grade steel pipe pile, which can be used for projects with extremely high strength or foundation projects of important structures such as large buildings and bridges.
Chemical composition
The analysis of chemical composition is very important for ASTM A252 steel pipe piles, and chemical analysis must be carried out in accordance with the test methods, operations and terminology of ASTM A751. The phosphorus content in steel shall not exceed 0.050% to ensure the quality and performance of the steel. Buyers can take 2 samples from each batch of pipe piles for product analysis to ensure that the chemical composition meets the requirements.
Summary
The ASTM A252 standard clearly stipulates the performance indicators, manufacturing process, chemical composition, dimensional deviation, etc. of welded steel and seamless steel pipe piles, ensuring the safe and reliable application of steel pipe piles in foundation engineering. Whether in terms of material selection, manufacturing process or quality standards, the ASTM A252 standard provides strong guidance and support for the design, manufacture and use of steel pipe piles.
