ASTM A53 Grade B

- 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.

- 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

ASTM A53 Grade A Elements	Type S (Seamless)	Type E
		(Electric-resistance Welded)
	Gr. B	Gr. B
Carbon max. %	0.30*	0.3
Manganese %	1.2	1.2
Phosphorous, max. %	0.05	0.05
Sulfur, max. %	0.045	0.045
Copper, max.%	0.4	0.4
Nickel, max. %	0.4	0.4
Chromium, max. %	0.4	0.4
Molybdenum, max. %	0.15	0.15
Vanadium, max. %	0.08	0.08
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).

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.

- 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.

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