ASTM A53 Grade B


ASTM A53 Grade B

ASTM A53 Grade B pipe (also known as ASME SA53 pipe) is designed for mechanical and pressure applications, but it is also suitable for general use in steam, water, gas, and airlines. Subject to particular conditions, it is ideal for welding as well as shaping operations like coiling, bending, and flanging.

ASTM A53 Grade B pipe is appropriate for welding and covers Seamless and Welded, Black and Hot-Dipped Galvanized nominal (average) wall pipe for coiling, bending, flanging, and other specific operations. Flanging is not recommended for the continuous-welded pipe. The purpose for which the pipe is designed should be specified in the order.

Why choose tuspipe?


Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes.

With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.

TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality,  the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.

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Types of ASTM A53 Grade B Pipes

- ASTM A53 Grade B Type E – Electric Resistance Welded Pipe.

The longitudinal junction of Type E Garde B pipes is welded by heat generated by electric resistance between the pipe’s opposite ends. In this operation, a set of rollers is also used to connect heated ends. The weld seam of Grade pipes is heat-treated to a minimum of 540°C after welding.

- ASTM A53 Grade B Type S – Seamless Pipe

Type S pipes are made by the extrusion method. An open-hearth furnace, an electric furnace, or a basic-oxygen process is used to produce the raw steel needed to build pipes.

Application and Usage of ASTM A53 Grade B Piping

- ASTM A53 Grade B Pipes for Oil & Gas

ASTM A53 Grade B pipes are applied in a range of applications, including commodities processing, marine applications, and oil and gas transportation of gas and liquid. Our clients typically require anti-corrosive coating for pipes used to carry oil, gasoline, and propane, and we are pleased to supply.

ASTM A53 Grade B pipes, which are normally built of carbon steel or low alloy steel, are less economical to manufacture than tubing in most circumstances. In order to estimate how much product can flow through the pipe, the internal diameter of the pipe is the most critical measurement. Pressure rating, yield strength, and ductility are all key features to consider.

- ASTM A53 Grade B Pipes for Structural Steel

ASTM A53 Grade B pipe is available in a wide range of diameters and grades, allowing it to be used in a wide number of structural applications and for a wide variety of structural functions. Columns, bollards, sign poles, structural supports, and piling are just a few of the often used uses for the structural pipe.

- ASTM A53 Grade B Pipes for Metallic Conduit

ASTM A53 Grade B metallic conduit pipes are robust steel containers used to convey individual electrical wiring conductors across a building or structure while protecting them from collision, moisture, and chemical vapors. Electrical metallic tube (EMT) is another term for conduit pipes and electrical metallic tubing (EMT).

Conduit pipes are classified according to their wall thickness, the mechanical stiffness of their joints, and the material used. Conduit pipes are formed of galvanized steel tubes with a suitable wall thickness to allow for threading. Galvanized rigid conduit pipes (GRC) are a type of threaded rigid conduit. IMC is a lighter-weight, thinner form of rigid metal conduit (RMC).

To eliminate zinc accumulation on the interior of the tubes, the ASTM A53 Grade B tubes are hot-dipped galvanized, and then blown dry. A clear lacquer is sprayed to the outside to ensure long shelf life. The conduit’s exceptional ductility enables straightforward bending, threading, and cutting operations.

- ASTM A53 Grade B Pipes for Conveyor Roller

Conveyor roller pipes manufactured to ASTM A53 Grade B specifications can be machined and turned into conveyor rollers. Conveyor roller pipes are conveyor belt components that are used to carry goods or loose bulk materials such as coal, sand, or iron ore. Conveyor roller pipes are a critical component of this system, as they enable transportation.

The conveyor belt transports the goods as it loops around the pulleys and roller pipes. The conveyor pulleys are responsible for driving the belt, maintaining tension on it, and guiding it in the desired direction. More information regarding the purpose and operation of conveyor pulleys may be found in our blog post on the subject. Conveyor roller pipes are responsible for transporting the conveyor belt from one drum to another. They are just used to provide support for the belt.

Dimensions and Sizes of ASTM A53 Grade B Pipe

DNO. D.W. T.
652 1/2″732.
903 1/2″

Chemical Composition of ASTM A53 Grade B Pipes

ASTM A53 Grade A ElementsType S
Type E
(Electric-resistance Welded)
Gr. BGr. B
Carbon max. %0.30*0.3
Manganese %1.21.2
Phosphorous, max. %0.050.05
Sulfur, max. %0.0450.045
Copper, max.%0.40.4
Nickel, max. %0.40.4
Chromium, max. %0.40.4
Molybdenum, max. %0.150.15
Vanadium, max. %0.080.08
NOTE: An increase of 0.06 percent of manganese over the given maximum will be authorized for each reduction of less than 0.01 percent below the specified carbon limit, up to a maximum of 1.65 percent (does not apply to SA53).

Mechanical Properties of ASTM A53 Grade B Pipes

Types and GradesMin. Tensile StrengthMin. Yield Strength
Type E and S – Grade B415Mpa / 60000psi240Mpa / 35000psi

Thickness and Mass Tolerance of ASTM A53 Grade B Pipes

Outside DiameterNPS 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%

Test & Inspection During ASTM A53 Grade A Pipe Production

  • Chemical Analysis – Number of tests: 2 pieces each lot of 500 or 2 pieces per heat. (If either pipe fails, an additional two pieces from the same batch must be tested.)
  • Tensile Test – This test is performed to assess the mechanical properties of the pipe. In the case of welded pipe, the weld strength shall not be less than the pipe body strength.
  • Bending Test – On pipe diameters NPS 2 and less, a bending test is performed to determine the ductility of the pipe. The bend test could be 90 degrees or 180 degrees, depending on the situation.
  • Flattening Test – For ductility, pipe sizes greater than NPS 2 are flattening test. In line with ASTM A53, a pipe sample is sliced and flattened between two flat surfaces.
  • Hydro-Test – This is a test that is performed on each length of the pipe to determine whether or not there is a leak. The pressure must be maintained for at least 5 seconds.
  • Weld Seam Ultrasonic or Electromagnetic Test – This non-destructive test is performed throughout the whole length of the weld to check the weld’s integrity.

Type of ASTM A53 Grade B Pipe Ends

  • 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.

Marking Contents of ASTM A53 Grade B Pipes

The following markings must be put to each length of pipe (or bundle for lesser diameters):

  • A53 type manufacturer’s name (S, E, F)
  • Diameter and timetable (from 10 to 160 and XXS)
  • “ASTM A53” designation
  • Heat number
  • Pipe length
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