ASTM A53
ASTM A53/A53M is a widely adopted standard by the American Society for Testing and Materials (ASTM) for carbon steel pipes used in mechanical/structural applications, pressure systems, and general-purpose utilities (e.g., water,oil & gas, structures, constructions pipelines)
ASTM A53 specification covers seamless and welded black and hot-dipped galvanized steel pipe in NPS 1/8" to NPS 26" (DN6 to DN 650) ,inclusive, with nominal wall thickness.
Type F-Furnace-butt-welded, continuous welded Grades A and B.
Type E-Electric-resistance-welded, Grades A and B.
Type S-Seamless, Grades A and B.
size of ASTM A53 Pipe
| NPS | O.D. | Nominal Wall Thickness | |||||||||||||||
| DN | Inch | mm | SCH5S | SCH10S | SCH 10 | SCH 20 | SCH 30 | SCH40 | SCH60 | SCH80 | SCH 100 | SCH 120 | SC H140 | SCH160 | STD | XS | XXS |
| 50 | 2" | 60.3 | 1.65 | 2.77 | - | - | - | 3.91 | - | 5.54 | - | - | - | 8.74 | 3.91 | 5.54 | 11.07 |
| 65 | 21/2" | 73 | 2.11 | 3.05 | - | - | - | 5.16 | - | 7.01 | - | - | - | 9.53 | 5.16 | 7.01 | 14.02 |
| 80 | 3" | 88.9 | 2.11 | 3.05 | - | - | - | 5.49 | - | 7.62 | - | - | - | 11.13 | 5.49 | 7.52 | 15.24 |
| 90 | 31/2" | 101.6 | 2.11 | 3.05 | - | - | - | 5.74 | - | 8.08 | - | - | - | - | 5.74 | 8.08 | - |
| 100 | 4" | 114.3 | 2.11 | 3.05 | - | - | - | 6.02 | - | 8.58 | - | 11.13 | - | 13.49 | 6.02 | 8.56 | 17.12 |
| 125 | 5" | 141.3 | 2.77 | 3.4 | - | - | - | 6.55 | - | 9.53 | - | 12.7 | - | 15.88 | 6.55 | 9.53 | 18.05 |
| 150 | 6" | 168.3 | 2.77 | 3.4 | - | - | - | 7.11 | - | 10.97 | - | 14.27 | - | 18.26 | 7.11 | 10.97 | 21.95 |
| 200 | 8" | 219.1 | 2.77 | 3.76 | - | 6.35 | 7.04 | 8.18 | 10.31 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 8.18 | 12.7 | 22.23 |
| 250 | 10" | 273.1 | 3.4 | 4.19 | - | 6.35 | 7.8 | 9.27 | 12.7 | 15.09 | 18.26 | 21.44 | 25.4 | 28.58 | 9.27 | 12.7 | 25.4 |
| 300 | 12" | 323.9 | 3.96 | 4.57 | - | 6.35 | 8.38 | 10.31 | 14.27 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 9.53 | 12.7 | 25.4 |
| 350 | 14" | 355.5 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | 11.13 | 15.09 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | 9.53 | 12.7 | - |
| 400 | 16" | 406.4 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | 12.7 | 16.66 | 21.44 | 26.19 | 30.96 | 36.53 | 40.49 | 9.53 | 12.7 | - |
| 450 | 18" | 457.2 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | 14.27 | 19.05 | 23.83 | 39.36 | 34.93 | 39.67 | 45.24 | - | - | - |
| 500 | 20" | 508 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | 15.09 | 20.62 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 | - | - | - |
| 550 | 22" | 558.8 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | - | 22.23 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | - | - | - |
| 600 | 24" | 609.6 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | 17.48 | 24.61 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | - | - | - |
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Chemical Requirements of ASTM A53 Pipe
ASTM A53 standard defines two primary grades (A and B), each with distinct elemental limits:
| Composition, max,% | |||||||||
| Carbon | Manganese | Phosphorus | Sulfur | CopperA | NickelA | ChromiumA | MolybdenumA | VanadiumA | |
| Type S (seamless pipe) | |||||||||
| Grade A | 0.25B | 0.95 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 |
| Grade B | 0.30C | 1.2 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 |
| Type E (electric-resistance-welded) | |||||||||
| Grade A | 0.25B | 0.95 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 |
| Grade B | 0.30C | 1.2 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 |
| Type F (furnace-welded pipe) | |||||||||
| Grades A and B | 0.30B | 1.2 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 |
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Mechanical Properties Requirements of ASTM A53 Pipe
The mechanical properties requirements for ASTM A53 pipes are standardized across seamless (Type F) and welded (Type E, ERW) types, with key differences between Grade A and Grade B.
- Type E, Electric-Resistance-Welded Pipe-Pipe produced in single lengths, or in multiple lengths from coiled skelp and subsequently cut into individual lengths, having a longitudinal butt joint wherein coalescence is produced by the heat obtained from resistance of the pipe to the flow of electric current in a circuit of which the pipe is a part, and by the application of pressure.
- Type S, Seamless Pipe-Pipe made without a welded seam. It is manufactured by hot working steel and, if necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions, and properties.
- Type F, Furnace-Butt-Welded Pipe, Continuous Welded Pipe-Pipe produced in multiple lengths from coiled skelp and subsequently cut into individual lengths, having its longitudinal butt joint forge welded by the mechanical pressure developed in rolling the hot-formed skelp through a set of round pass welding rolls.
| Types and Grades | Min. Tensile Strength | Min. Yield Strength |
| Type E and S - Grade A | 330Mpa/48000psi | 205Mpa/30000psi |
| Type E and S- Grade B | 415Mpa/60000psi | 240Mpa/35000psi |
| Type F- Grade A | 330Mpa/48000psi | 205Mpa/30000psi |
End Finish Of ASTM A53 Pipe
- Pipes with diameters less than 0.500 inches and STD / XS pipes with plain or beveled ends
- Pipe schedules greater than 0.500 inches in diameter and XXS: Ends are squared cut and simple.
- Thread protection is required for pipes larger than 4 inches if they are supplied with threaded ends.
Thickness And Mass Tolerance Of Astm A53 Pipe
Mass Tolerance: ±10% of theoretical weight per unit length; Thickness Tolerance: ±12.5% of nominal wall thickness .
| Item | 0.D. | over | Under |
| Outside Diameter | NPS 1/8 to 1-1/2, DN 6 to 40 | ±0.4mm | ±0.4mm |
| NPS 2 and up, DN 50 and up | ±1% | ±1% | |
| Wall Thickness at Any Point | _ | ±12.5% | |
| Weight | ±10% | ±10% | |
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