ASTM A135 Grade A
ASTM A135 Grade A
ASTM A135 Grade A is a steel grade used for Electric-Resistance-Welded (ERW) steel pipes. The chemical and mechanical properties of ASTM A135 Grade A pipes make them ideal for use in high-pressure applications, such as conveying gas, vapor, water, or other fluid. In some countries, ASTM A135 Grade A pipes are also used as fire sprinkler pipes. According to the standard, only Grade A pipes are adapted for flanging and bending.
ASTM A135 Grade A is a type of carbon steel that shall be made by either or both basic oxygen or electric-furnace processes. Steel may be cast in ingots or may be strand cast. The pipe shall be manufactured from flat-rolled steel in individual lengths or continuous lengths by electric-resistance or electric-induction welding without the addition of extraneous material. Tensile and chemical requirements of the steel are provided. Specimens of the steel pipes are subject to flattening tests and hydrostatic tests. A nondestructive electric test, either electromagnetic (eddy current) or ultrasonic test, may be preferred as an alternative to the hydrostatic test.
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.
Chemical Composition of ASTM A135 Grade A
Mechanical Properties of ASTM A135 Grade A
|Tensile strength, min, ksi (MPa)||48 (331)|
|Yield strength, min, ksi (MPa)||30 (207)|
|Elongation in 2 in. (50 mm), min, %|
|For pipe having a specified wall thickness of5 ⁄16in. (7.9 mm) or more, if tested using a longitudinal strip test specimen||35|
|For pipe having a specified wall thickness of less than5 ⁄16 in. (7.9 mm), if tested using a longitudinal strip test specimen||A|
|For pipe of any size, if tested using a full-size longitudinal test specimen||35|
Specifications of ASTM A135 Grade A
The American Society for Testing and Materials ASTM A135 Grade A covers electric-resistance-welded (ERW) steel pipe in sizes NPS 2 to 30, with nominal (average) wall thickness up to 12.7mm, inclusive. It also covers ERW steel pipe in sizes NPS 3/4 to 5 with a nominal (average) wall thickness of 2.11mm to 3.40mm, depending on size. The ASTM A135 standard is widely used in the construction and oil & gas industries because it covers a wide range of applications, including water transmission lines; process piping; distribution piping; condenser and heat exchanger tubes; high-temperature steam lines; and general service lines. This comprehensive listing of standardized pipe dimensions will help engineers and specifiers select the right size pipe for their needs.
|N.D.||O.D.||SCH 10||SCH 30/40|
|WALL THICKNESS||NOMINAL WEIGHT||WALL THICKNESS||NOMINAL WEIGHT|