The full name of ASTM A53 standard is "standard specification for pipe, steel, black and hot-dipped, zinc-coated, welded and seamless", which is the standard specification for black and hot-dip galvanized welded and seamless steel pipes.
This standard is formulated by American Society for Testing and Materials (ASTM) and is applicable to seamless and welded black and hot-dip galvanized steel pipes with nominal sizes (NPS) of 1/8 to 26(DN 6 to DN 650). The steel pipe should be made of open hearth furnace, basic oxygen converter or electric furnace smelting process.
The steel pipes in ASTM A53 standard are divided into three types and two grades. The three types are: F-type, which is furnace butt welding or continuous welding steel pipe (Grade A only); Type E, resistance welded steel pipe (Grade A and B); Type S, seamless steel pipe (Grade A and B). The two grades are Grade A and Grade B, and the mechanical properties of Grade B are higher than Grade A. For example, the minimum tensile strength of Grade A seamless steel pipe is 48,000 psi (330 MPa) and the minimum yield strength is 30,000 psi (205 MPa). The minimum tensile strength and minimum yield strength of grade B seamless steel pipe are 60000psi(415MPa) and 35000psi(240MPa).
The steel pipes produced according to this standard are suitable for mechanical and pressure applications, as well as common uses such as steam, water, gas and air pipelines, and are suitable for welding and forming operations involving winding, bending and flanging, but F-type steel pipes are not suitable for flanging. When S-type and E-type need to be tightly coiled or cold-bent, Grade A is the first choice. In addition, the steel pipe needs to be tested for mechanical properties such as stretching, bending and flattening, as well as hydrostatic test or nondestructive electrical test to ensure its quality and performance meet the standard requirements.