Line pipe: ASTM A53

ASTM/ASME A53/SA53 Seamless and Welded Standard Steel Pipe

Domestically produced welded and seamless steel pipe for general processing applications.

UNION VICTORY Products ASTM/ASME A53/SA53 seamless and welded steel pipe is a general, all-purpose pipe used in generator plants, refineries, compressor stations, natural gas transmission, and steam conduction. It is acceptable for welding, flanging, and bending.

-Sizes:

-NPS ¼” to NPS 26” O.D.

-Wall thickness: Schedules 10 through 160, STD, XH and XXH
-Commonly requested unscheduled walls up to 4” and certified minimum wall items

-ASTM A53 Seamless Steel Tube Application:

1. Construction categories are: under the pipeline transport up to more, cover the floor when the extraction of groundwater, boiler hot water transport and so on.

2. Machining, bearing sets, processing machinery parts and so on.

3. Electric class: gas transmission, water generation fluid pipeline.

4. Wind power plant anti-static tube



-A53 Comparative Specifications:

-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



-Testing Requirements for seamless and welded API 53 steel pipe

-Hydrostatic Testing test pressures for plain and threaded and coupled pipe are specified. Hydrostatic pressure shall be maintained for not less than 5 seconds for all sizes of seamless and ERW pipe.

-Mechanical Tests:

1.Tensile Test: Two transverse tests required on the ERW for NPS 8 and larger, one across the weld and one opposite the weld.

2. Flattening Test: On ERW for NPS 2 and larger, STD and XS wall (not required for XXS pipe)

3. Bending Test (cold): For NPS 2 and under, XS wall and under; for NPS 1-1/4 and under, XXS wall



Degree of Bend Diameter of Mandrel

For normal A53 users 90 12 x nom. diameter of pipe

For Close Coiling 180 8 x nom. diameter of pipe



-Number of Tests: Seamless and Electric Resistance Weld (ERW) – bending, flattening, tensile on one length of pipe from each lot of 500 lengths, or less, of each pipe size.

-Permissible Variations for A53 steel pipe:

-Wall thickness: The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.

-Weights per foot are plus or minus 10%

-Outside diameter: Outside diameter at any point shall not vary from standard specified more than:



NPS Over Under

1-1/2 and smaller +1/64” -1/64”

2 and larger +1% -1%



-Lengths of A53 steel pipe

UNION VICTORY Products A53 seamless and welded steel pipe is produced in random lengths 16’ – 22’ or 32’ – 44’, in multiple lengths, and in specific cut lengths.

-Marking Requirements:

Rolled, die-stamped, ink-printed, or stenciled (manufacturer’s option).

Manufacturer’s name, brand, or trademark

Size and wall

Steel grade