A/SA53 Pipe Specifications
ASTM A53 and ASME SA53 is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas and air lines. It is suitable for welding and for forming operations involving coiling, bending, and flanging, subject to certain qualifications.
A/SA53 covers Seamless and Welded, Black and Hot-Dipped Galvanized nominal (average) wall pipe for coiling, bending, flanging and other special purposes and is suitable for welding. Continuous-Welded pipe is not intended for flanging. Purpose for which pipe is intended should be stated on order.
APP stock a full range of A/SA53-B seamless & welded pipe in:
- Sizes: 1/8” NPS to 26” OD
- Schedules 10 through XXH
- Non-Scheduled Walls: .188″ and .219″
Looking for a supply partner that can offer more than just random lengths of pipe or tube? See our full list of value-added services here.
Materials and Manufacture
The steel for both seamless and welded pipe shall be made by one or more of the following processes: open-hearth, electric furnace, or basic-oxygen. The weld seam of electric-resistance welded pipe in Grade B shall be heat treated after welding.
Tensile Requirements
| Seamless and Electric-resistance-welded | Continuous-Welded | |||
| Grade A | Grade B | |||
| Tensile Strength, min., psi | 48,000 | 60,000 | 45,000 | |
| Yield Strength, min., psi | 30,000 | 35,000 | 25,000 | |
Chemical Requirements
| Type S (seamless) |
Type E | Type F | ||||||
| (electric- resistance welded) |
(furnace- welded pipe) |
|||||||
| Grade A | Grade B | Grade A | Grade B | Grade A | ||||
| Carbon max. % | 0.25 | 0.30* | 0.25 | 0.30* | 0.3 | |||
| Manganese % | 0.95 | 1.2 | 0.95 | 1.2 | 1.2 | |||
| Phosphorous, max. % | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | |||
| Sulfur, max. % | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | |||
| Copper, max.% | 0.40 | 0.40 | 0.40 | 0.40 | 0.4 | |||
| Nickel, max. % | 0.40 | 0.40 | 0.40 | 0.40 | 0.4 | |||
| Chromium, max. % | 0.40 | 0.40 | 0.40 | 0.40 | 0.4 | |||
| Molybdenum, max. % | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | |||
| Vanadium, max. % | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | |||
| *For each reduction below 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.65% (does not apply to SA53). | ||||||||
Permissible Variations in Wall Thickness
The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.
Permissible Variations in Weights per Foot
Plus or minus 10%
Permissible Variations in Outside Diameter
Outside Diameter at any point shall not vary from standard specified more than:
| For NPS 1 1/2 and Smaller Sizes | For NPS 2 and Larger Sizes | |||||
| 1/64″ over | 1/64″ under | 1% over | 1% under | |||
Hydrostatic Testing
Hydrostatic inspection test pressures for plain end and threaded and coupled pipe are specified. Hydrostatic pressure shall be maintained for not less than 5 seconds for all sizes of seamless and electric-resistance-weld pipe.
Mechanical Tests Specified
Tensile Test — Transverse required on ERW for NPS 8 and larger.
| Degree of Bend | Diameter of Mandrel | ||
| For Normal A53 Uses | 90 | 12 x nom dia. of pipe | |
| For Close Coiling | 180 | 8 x nom dia. of pipe |
Flattening Test — NPS 2 and larger XM and lighter walls.
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