astm a53 welded pipe || a53 welded pipe || Api 5L a53 welded pipe Specification | Techinical Information | Dimensions
Reliant Pipes & Tubes Pvt. Ltd.

astm a53 welded pipe || a53 welded pipe || Specification | Techinical Information | Dimensions

astm a53 welded pipe || a53 welded pipe || Specification | Techinical Information | Dimensions

astm a53 welded pipe || a53 welded pipe || Specification | Techinical Information | Dimensions

astm a53 welded pipe || a53 welded pipe || Specification | Techinical Information | Dimensions

astm a53 welded pipe manufacturers, astm a53 welded pipe suppliers, astm a53 welded pipe exporters, astm a53 welded pipe distributors, astm a53 welded pipe traders, astm a53 welded pipe stockholder, astm a53 welded pipe wholesaler, astm a53 welded pipe stockist in India

ASTM A53 is a carbon steel alloy, used as structural steel or for low-pressure plumbing. The alloy specifications are set by ASTM International, in specification ASTM A53/A53M.

A53 pipe comes in three types and two grades, A53 Type F, which is longitudinally furnace butt welded or continuous welded (Grade A only), A53 Type E, which is longitudinally electric resistance welded (Grades A and B), and A53 Type S, which is seamless pipe, produced by hot working, and possibly cold finishing, the steel (Grades A and B). ASTM A53 pipe is sized according to the nominal pipe size (NPS) system. It is commonly available with national pipe thread ends or with plain cut ends. It can be used for steam, water, and air conveyance. It is also weldable and can be used in structural applications, although ASTM A500 tube, which is available in the same NPS sizes, is sometime preferred.

This is a standard set by the standards organization ASTM International, a voluntary standards development organizations that sets technical standards for materials, products, systems, and services.

ASTM A53 Standard- 06A - 
1. Scope of ASTM A53 Standard ASTM A53 is standard specification for pipe, steel, black and hot dipped, zinc-coated, welded and seamless. This specification2 covers seamless and welded black and hot-dipped galvanized steel pipe in NPS 1⁄8 to NPS 26 [DN 6 to DN 650] (Note 1), inclusive, with nominal wall thickness. It shall be permissible to furnish pipe having other dimensions provided that such pipe complies with all other requirements of this specification.Supplementary requirements of an optional nature are provided and shall apply only when specified by the purchaser.
2. Application of ASTM A53 Standard Pipes Steel Pipes ordered under this specification 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 suitable for forming operations involving coiling, bending, and flanging.
3. Types and Grades This specification covers the following types and grades:
3.1 Type F—Furnace-butt-welded, continuous welded Grade A.
3.2 Type E—Electric-resistance-welded, Grades A and B,
3.3 Type S—Seamless, Grades A and B.
Type F is not intended for flanging.
If Type S or Type E is required for close coiling or cold bending, Grade A is the preferred grade; however, this is not intended to prohibit the cold bending of Grade B pipe.
Type E is furnished either nonexpanded or cold expanded at the option of the manufacturer.
4. Materials and Manufacture of ASTM A53 Pipes
4.1 The steel for both seamless and welded pipe shall bemade by one or more of the following processes: open-hearth, electric-furnace, or basic-oxygen.
4.2 If steels of different grades are sequentially strand cast, identification of the resultant transition material is required. The steel producer shall remove the transition material by any established procedure that positively separates the grades.
4.3 The weld seam of electric-resistance welded pipe in Grade B shall be heat treated after welding to a minimum of 1000 °F [540 °C] so that no untempered martensite remains, or otherwise processed in such a manner that no untempered martensite remains.
4.4 When pipe is cold expanded, the amount of expansion shall not exceed one and one-half percent (1-1⁄2%) of the specified outside diameter of the pipe.

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

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

A53 Comparative Specifications

ASTM Specification A53 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. Reliant Pipes Products does not produce galvanized pipe.


Seamless and ERW Grade A Grade B
Tensile Strength, min, psi   48,000 60,000
Yield Strength 30,000 35,000


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:
      • Tensile Test: Two transverse tests required on the ERW for NPS 8 and larger, one across the weld and one opposite the weld.
      • Flattening Test: On ERW for NPS 2 and larger, STD and XS wall (not required for XXS pipe)
      • 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
    U. S. Steel Tubular 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
    • ASTM A53

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