A53 Grade B Pipe

ASTM A53 pipe (also referred to as ASME SA53 pipe) 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, subject to certain qualifications.









A53 Grade B Pipe Features-


Low-temperature services serve at -45F°F (-45°C) Excellent strength and ductility.
Conductivity than alloy steels.
Higher strength with low coefficients of thermal.
Better weldability and greater toughness.



A53 Grade B Pipe similar Equivalent Products-


Sizes (Seamless): 1/2" NB – 60" NB
Sizes (ERW): 1/2" NB – 24" NB
Sizes (SAW): 16" NB – 100" NB
Wall Thickness available:
Schedule 20 – Schedule XXS (heavier on request) up to 250 mm thk.

NPS 1/4"- 30"
Schedules 10 through 160, STD, XH and XXH
Covers seamless carbon steel nominal wall pipe for high-temperature service. Suitable for bending, flanging and similar forming operations.

NPS 1-1/2" and under may be either hot finished or cold drawn. NPS 2" and larger shall be hot finished unless otherwise specified.




 A53 Grade B Pipe Specifications-


Sizes (Seamless): 1/2" NB – 60" NB
Sizes (ERW): 1/2" NB – 24" NB
Sizes (SAW): 16" NB – 100" NB
Scope Covers SEAMLESS carbon steel nominal wall pipe for high-temperature service, suitable for bending, flanging and similar forming operations.
NPS 1 1/2 and under may be either hot finished or cold drawn. NPS 2 and larger shall be hot finished unless otherwise specified.
Kinds of Steel Permitted For
For Pipe Material
Killed Steel
Welded Line Type Longitudinal
Not covered in specification.
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.
Types and grades Type F—Furnace-butt-welded, continuous welded Grade A,
Type E—Electric-resistance-welded, Grades A and B, and
Type S—Seamless, Grades A and B.
Hydrostatic Testing Inspection test pressures produce a stress in the pipe wall equal to 60% or specified minimum yield strength (SMYS) at room temperature. Maximum Pressures are not to exceed 2500 psi for NPS 3 and under and 2800 psi or the larger sizes.
Permissible Variations in Weights per Foot Weight of any length shall not vary more than 10% over and 3.5% under that specified.
NOTE — NPS 4 and smaller — weighed in lots. Larger sizes — by length
Permissible Variations in Outside Diameter NPS Over Under
1 1/2 and smaller 1/64" 1/32"
2 — 4 1/32" 1/32"
5 — 8 1/16" 1/32"
10 — 18 3/32" 1/32"
20 — 26 1/8" 1/32"
Number of Tests Required   NPS On One Length From Each Lot of
Tensile 5 and smaller
6 and larger 200 or less
400 or less
6 and larger 200 or less
Bonding 2 and smaller 400 or less
Flattening 2 through 5
6 and over
400 or less
200 or less
Lengths Lengths required shall be specified on order. No "jointers" permitted unless otherwise specified.
If no definite lengths required, following practice applies:
Single Random — 16′ – 22′. 5% may be 12′ – 16′
Double Random — Minimum length 22′, Minimum average 35′. 5% may be 16′ – 22′.
Required Markings on Each Length(On Tags attached to each Bundie in case of Bundled Pipe) Rolled Stamped or Stenciled (Mfgrs. option)
Manufacturer’s name or brand. Length of pipe.
A53 B. ANSI schedule number.
Hydrostatic test pressure and/or NDE. Weight per foot (NPS 4 and larger)
or NH if neither is specified. Additional "S" if tested supplementary requirements.
General Information Unless otherwise specified, pipe furnished with plain ends.
Purchaser may specify NDE
Surface finish standards are outlined in specification. 
in lieu of hydrostatic test or neither

A53 Electronic Resistance Welded (ERW)

A53 Electronic Fusion Welded (EFW)

A53 Double Submerged Arc Welded (DSAW)

A53 Grade B Pipe Packaging

Small A53 Grade B pipes in bundles with strong steel strips
Big diameter A53 Grade B pipes: in loose
Covered with plastic woven bags; Suitable for lifting operation; Loaded in 40ft or 20ft container or in bulk

As per customer’s requests.

A53 Grade B Pipe Application Oil & Gas, Power generation, Nuclear power generation, Refining, Chemical process, Petrochemical, and Water treatment
Why Choose us?

Quick response in quotation, delivery, after-service

Focus on pipe & tube solution for project application

Third party inspection is accepted.

A53 Grade B Pipe Available Surface Finish Surface Finishes:Oil-dip, Varnish, Passivation, phosphating, Shot Blasting
End Finishes: Beveled, Square Cut, Threaded & Coupled



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