ASTM A179 Seamless Carbon Steel Tube

ASTM A179 is a steel pipe standard established by the American Society for Testing and Materials (ASTM) and is mainly used in the manufacture of high-pressure equipment such as steam turbines. This kind of steel pipe is made of high-quality carbon steel or alloy steel and is produced through hot rolling or cold drawing processes. It has the advantages of high strength, high pressure resistance, and corrosion resistance.
ASTM A179 seamless steel pipe has various specifications. According to different usage occasions and equipment requirements, steel pipes with different diameters and wall thicknesses can be selected. For example, "19.05*2.11" in this example means that the outer diameter of the seamless steel pipe is 19.05 inches and the wall thickness is 2.11 inches.
In the manufacturing of high-pressure equipment, ASTM A179 seamless steel pipe can ensure the safety and stability of the equipment due to its high strength, high pressure resistance and corrosion resistance. For example, in steam turbines, this kind of steel pipe can withstand the erosion and impact of high-temperature and high-pressure steam, ensuring the normal operation of the equipment.
In summary, ASTM A179 seamless steel pipe is a high-quality, high-performance steel pipe material that is widely used in the manufacturing of high-voltage equipment. Its advantages of high strength, high pressure resistance and corrosion resistance ensure the safety and stability of the equipment.

Tolerances of Wall Thickness

Outside Diameter, in. [mm]	Wall Thickness, %
	0.095[2.4] and Under		Over 0.095 to 0.150 [2.4 to 3.8], incl		Over 0.150 to 0.180 [3.8 to 4.6], incl		Over 0.180,[4.6]
	Over	Under	Over	Under	Over	Under	Over	Under
Seamless, Cold-Finished Tubes
	Over				Under
1 1 ⁄ 2 [38.1] and under	20				0
Over 1 1 ⁄ 2 [38.1]	22				0

Tolerances of Outside Diameter

Outside Diameter,in. [mm]	Permissible Variations, in. [mm]
	Over	Under
Under 1 [25.4]	0.004 [0.1]	0.004 [0.1]
1 to 1 1 ⁄ 2 [25.4 to 38.1], incl	0.006 [0.15]	0.006 [0.15]
Over 1 1 ⁄ 2 to 2 [38.1 to 50.8], excl	0.008 [0.2]	0.008 [0.2]
2 to 2 1 ⁄ 2 [50.8 to 63.5], excl	0.010 [0.25]	0.010 [0.25]
2 1 ⁄ 2 to 3 [63.5 to 76.2], excl	0.012 [0.3]	0.012 [0.3]
3 to 4 [76.2 to 101.6], incl	0.015 [0.38]	0.015 [0.38]
Over 4 to 7 1 ⁄ 2 [101.6 to 190.5], incl	0.015 [0.38]	0.025 [0.64]
Over 7 1 ⁄ 2 to 9 [190.5 to 228.6], incl	0.015 [0.38]	0.045 [1.14]

Tolerances of Length

Method of Manufacture	Outside Diameter, in. [mm]	Cut Length,in. [mm]
		Over	Under
Seamless, cold-finished	Under 2 [50.8]	1 ⁄ 8 [3]	0 [0]
	2 [50.8] and over	3 ⁄ 16 [5]	0 [0]
	2 [50.8] and over	3 ⁄ 16 [5]	0 [0]