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Welded steel pipe & tube

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.

ASTM A53

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

Packing ASTM A53 pipes
Packing

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  A  ≥330  ≥205
 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.

ASTM A53 Gr.B Pipes
+ ASTM A53 Gr.B Pipes

结构用无缝钢管 Size (mm):
O.D.: 6.0mm - 180 mm
W.T.:1mm - 30 mm
Length: max 11800mm

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

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

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



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