Covers black and hot-dipped galvanized Type E (electric-resistance-welded) Grade B
Pipe. It is intended for mechanical and pressure applications and is also for ordinary uses in steam, water, gas, and air lines. Allied ASTM A53 is produced in NPS 2 1/2” through 6” in Fire Sprinkler Pipe applications and is suitable for welding, threading and grooving. Allied ASTM A53 is produced according to the latest revision of ASTM A53/A53M.
Materials and Manufacture
The steel for 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 is processed in such a manner that no untempered martensite remains.
The steel shall conform to the requirements as to chemical composition (max %) given below (Table 1 of ASTM A53):
*The total combination for these ﬁ ve elements shall not exceed 1.00%
• Tensile strength, min, psi 60,000
• Yield strength, min, psi 35,000
• Elongation in 2 in. Refer to A53 Table X4.1
All tests that are required to be performed on Standard Sch 40, Type E, Grade B pipe products that are produced at Allied Tube will have those tests performed in accordance with ASTM A53, and they will be made available upon request, also in accordance with this speciﬁ cation.
Hydrostatic inspection test pressures for plain-end pipe are performed in-line and maintained for a minimum of 5 seconds in accordance with ASTM A53 Table X2.2.
Nondestructive Electric Test
Nondestructive electric (ultrasonic) testing is performed during the production of the blank A53 pipe as it is processed in accordance with ASTM A53.
Permissible Variations in Weight (Mass) and Dimensions
The weight (mass) of the pipe shall not vary more that +/- 10% from its
speciﬁ ed weight (mass).
For pipe NPS 2” or larger, the outside diameter shall not vary more than +/- 1% from the speciﬁ ed outside diameter.
The minimum wall thickness at any point shall not be more than 12.5% under the speciﬁ ed wall thickness. The minimum wall thickness on inspection shall conform to the requirements given in ASTM A53 Table X2.4.
Standard Schedule 40 ASTM A53 Type E Grade B (Black Plain-End)
Plain-end pipe of standard weight and NPS 2 1/2” and larger, shall be plain-end beveled to an angle of 30˚, +5˚, -0˚ and with a root face of 1/16 in. +/- 1/32 in.
Galvanized pipe will be produced upon request to meet the standards as outlined in Section 18 of ASTM A53.
Each length of pipe shall be legibly marked to show the following: Manufacturer’s name or mark (Allied Tube), Speciﬁ cation number(A53), Size, Grade (B), and Type (E).