ASTM A151 / ASME SA151 is a specification standard for carbon steel and alloy steel electrical resistance welded (ERW) pipes that are intended for use in conveying gas, vapor, water, or other liquids. These pipes are commonly used in industries such as petroleum, chemical, and power generation.
The ASTM A151 / ASME SA151 specification covers pipes with diameters ranging from 2 to 26 inches and with wall thicknesses of up to 0.750 inches. The pipes are classified into three grades: Grade A, Grade B, and Grade C, each with different tensile strengths.
The pipes under this specification are produced using the ERW process, which involves the welding of the longitudinal seam of the pipe using resistance heating and pressure. The pipes are then finished by cutting to the desired length, straightening, and testing.
ASTM A151 / ASME SA151 also specifies the chemical composition, mechanical properties, and other requirements of the pipes. These include requirements for flattening, flaring, and bending tests, as well as nondestructive electric testing.
Overall, ASTM A151 / ASME SA151 provides a comprehensive standard for the production and testing of carbon and alloy steel ERW pipes, ensuring their suitability and safety for use in a wide range of industrial applications.
For example, for a pipe with a nominal size of 6 inches and a wall thickness of 0.250 inches, the standard specifies an outside diameter of 6.625 inches and an inside diameter of 6.125 inches. For a pipe with a nominal size of 10 inches and a wall thickness of 0.500 inches, the standard specifies an outside diameter of 10.750 inches and an inside diameter of 9.750 inches.
It is important to note that the dimensions specified in the standard are only applicable to pipes produced according to the ASTM A151 / ASME SA151 specification. For pipes produced using different specifications or processes, the dimensions may differ.