ASTM A53

ASTM A53 - Standard specification for welded and seamless carbon steel pipe developed by the American Society for Testing and Materials (ASTM). The standard covers a variety of pipe sizes and thicknesses and applies to piping systems used to transport gases, liquids and other fluids.

ASTM A53 pipe is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas and air lines.

Sizes:

½” – 12” some limitations dependent upon grade. Sizes up to 26” OD are available on limited basis.

Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless. This specification covers seamless and welded black and hot-dipped galvanized steel pipe.

ASTM A53 Pipe Types:

The following types and grades of A53 pipe are covered within this specification:

• Type F Pipe – Furnace-butt-welded, continuous welded Grade A
• Type E Pipe - Electric-resistance-welded, Grades A and B, called A53 ERW pipe

• Type S Pipe - Seamless, Grades A and B, called A53 seamless pipe

ASTM A53 galvanizing standard requirements:

ASTM A53 standard specification including hot dipped galvanized (zinc coated) requirements for ASTM A53 Grade B pipe.
Moreover, there are pipe internal and external galvanization. By the hot dip procedures, zinc thickness of any grade shall be complied to specification B6.
Zinc coating weight should be not less than 1.8 oz/ft2, 0.55 kg/m2, and each sample weight shall not be not less than 1.6 oz/ft2 0.49 kg/m2, meanwhile sample outside surface and inside surface weight shall not be less than 1.3 oz/ft2 0.40 kg/m2.

ASTM A53 application:
1 Architecture: maximum pipeline under more groundwater extraction when towers, boilers, hot water conveyance and so on.
2 Machining, bearing sets, processing machinery and other accessories.
3 Electrical class: gas distribution, water power fluid conduit.
4 Anti-static tubes wind power plants.

MECHANICAL PROPERTIES – TENSILE REQUIREMENTS

seamless and erw	Grade A	Grade B
Tensile Strength, min, psi	48,000	60,000
Yield Strength	30,000	35,000

CHEMICAL REQUIREMENTS FOR A53

Seamless and ERW	C max %	Mn max %	P max %	S max %
Grade A	0.25	0.95	0.05	0.045
Grade B	0.30	1.20	0.05	0.045

Type	Carbon max. %		Manganese max. %		Phosphorous max. %		Sulfur max. %		Copper max. %		Nickel max. %		Chromium max. %		Molybdenum max. %
	Grade A	Grade B	Grade A	Grade B	Grade A	Grade B	Grade A	Grade B	Grade A	Grade B	Grade A	Grade B	Grade A	Grade B	Grade A	Grade B
Type S (seamless)	0.25	0.30	0.95	1.2	0.05	0.05	0.045	0.045	0.40	0.40	0.40	0.40	0.15	0.15	0.08	0.08
Type E (electric-resistance welded)	0.25	0.30	0.95	1.2	0.05	0.05	0.045	0.045	0.40	0.40	0.40	0.40	0.15	0.15	0.08	0.08
Type F (furnace-welded pipe)	0.30	/	1.2	/	0.05	/	0.045	/	0.40	/	0.40	/	0.15	/	0.08	/

Bending requirements

For pipe NPS 2(DN50) and under, a sufficient length of pipe shall be capable of being bent cold through 90°around a cylindrical mandrel, the diameter of which is twelve times the outside diameter of the pipe, without development cracks at any portion and without opening the weld.

When ordered for close coilling, the pipe shall stand being bent cold through 180°around a cylindrical mandrel, the diameter of which is eight times the outside diameter of the pipe, without failure.

Double extra strong pipe over NPS 1 1/4(DN 32) need not be subjected to the bend test.

Flattening test
The flattening test shall be made on pipe over NPS 2(DN 50) with all thickness extra strong and lighter.

For seamless pipe, a test specimen at least 2 1/2 in.(60mm) in length shall be flattened cold between parallel plates in two steps. During the first step, which is a test for ductility, no cracks or breaks on the inside, outside, or end surfaces. During the second step, which is test for soundness, the flattening shall be continued until the test specimen breaks or the opposite sides of the pipe meet. Evidence of laminated or unsound material that is revealed during the entire flattening test shall be cause for rejection.

For electric resistance welded pipe, a test specimen at leat 4in. (100mm) in length shall be flattened cold between parallel plates in three steps, with the weld located either 0°or 90°from the line of direction of force. During the first step, which is a test for ductility of the weld, no cracks or breaks on the inside or outside surfaces at the weld shall occur until the distance between the plates is less then two thirds of the specified diameter of the pipe. as a second step, the flattening shall be continued as a test for ductility away from the weld. During the second step, no cracks or breaks on the inside or outside surfaces away from the weld. During the third step, which is test for soundness, the flattening shall be continued until the test specimen breaks or the opposite walls of the pipe meet. Evidence of laminated or unsound material or of incomplete weld that is revealed by the flattening test shall be cause of rejection.