ASTM A53

ASTM A53 standard refers to seamless and welded black and hot-dipped galvanized steel pipe.

ASTM A53 Gr.B Pipes

Size (mm):

Steel grade: ASTM A53 Grade.A; Grade.B

Mill test certificates will be issued according to EN10204/3.1B .

Application: For mechanical and pressure use, and also for transporting steam, water, gas and etc.

The steel categorized in this standard must be open-hearth, basic-oxygen or electric-furnace processed and must have the following chemical requirements: carbon, manganese, phosphorus, sulfur, copper, nickel, chromium, molybdenum, and vanadium.

The tubing shall undergo a seamless or welding process. Tension, bend, and flattening tests shall be performed to make sure that it must adhere to the mechanical properties of the standard.

Mechanical properties:

 Standard  Grade  Tensile strength(MPa)  Yield strength (MPa)
 ASTM A53  B  ≥415  ≥240

Chemical requirements:

Element Type S
(seamless)
Grade A Grade B
Carbon max. % 0.25 0.30
Manganese % 0.95 1.2
Phosphorous, max. % 0.05 0.05
Sulfur, max. % 0.045 0.045
Copper, max.% 0.40 0.40
Nickel, max. % 0.40 0.40
Chromium, max. % 0.40 0.40
Molybdenum, max. % 0.15 0.15
Vanadium, max. % 0.08 0.08

The hydrostatic test shall be applied, without leakage through the weld seam or the pipe body. Nondestructive electric test shall be made to make sure that the full volume of the pipe must be in accordance with the standard.

The purchaser shall have the right to perform any of the inspections and tests set forth in this specification where deemed necessary to ensure that the pipe conforms to the specified requirements.

SEAMLESS SPOOL-PIPE, FLANGED ASTM A.53
Seamless spool-pipe, flanged ASTM A53


Seamless pipe Specification, standard and identification

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.