A53 ERW carbon steel pipe

A53 ERW carbon steel pipe (ASTM A53 resistance welded carbon Steel Pipe) is a kind of welded pipe produced in accordance with the American Society for Testing and Materials (ASTM A53/A53M) standard. Its feature is that it is made of continuous steel strips as raw materials and welded by resistance welding (ERW) process. It is widely used in conveying, structural and mechanical support fields.

Main standards and classifications

Standard specification: ASTM A53/A53M

Production type:

Type E (ERW) : Resistance welded carbon steel pipe
Type F (OFW) : Furnace welded pipe
Type S: Seamless pipe

Grade

Grade A: Low carbon content, excellent ductility and weldability
Grade B: Higher strength, suitable for medium and high-pressure conveying

Specifications, dimensions and forms

Nominal size (NPS/DN) : ½ "- 24" (DN 15 - DN 600)

Wall thickness grade

SCH 10, SCH 20, SCH 40, SCH 80, SCH 160
XS (Extra Strong), XXS (Double Extra Strong)

Length: standard 6 m, 12 m, and can also be customized according to requirements

Surface treatment: Black (untreated), galvanized, anti-rust paint

Heat treatment and quality control

Annealing of ERW welds: The welds of Grade B pipes need to be annealed at a temperature above 540 ℃ to eliminate hard and brittle martensite and improve impact resistance.
Non-destructive testing: ultrasonic (UT), radiographic testing (RT) or eddy current testing (ET) to ensure that the quality of welds and base materials complies with ASTM standards.

The main chemical components of A53pipe

Grade	Chemical Composition (%) Max.
	C	Mn	P	S	Cu	Ni	Cr	Mo	V
A	0.25	0.95	0.05	0.045	0.4	0.4	0.4	0.15	0.08
B	0.3	1.2	0.05	0.045	0.4	0.4	0.4	0.15	0.08

Main mechanical properties:

Grade	Mechanical Properties, Min.
	Tensile Strength(Mpa)	Yield Strength(Mpa)
A	330	205
B	415	240

Typical application scenarios

Municipal and construction: Water supply and drainage pipes, HVAC (Heating, Ventilation and Air Conditioning) pipelines, scaffolding supports
Mechanical manufacturing: Hydraulic props, structural frames, equipment load-bearing pipes
Energy transmission: Medium and low-pressure steam, water and gas transmission pipelines
Fire protection system: indoor and outdoor fire sprinkler pipes, main fire hydrant pipes

Comparison with seamless pipes

ERW pipes are formed by resistance welding of steel strips and have the advantages of low cost, high production efficiency and diverse specifications. They are suitable for general structures and medium and low pressure fluid transportation. Seamless tubes, on the other hand, are formed by hot rolling or extrusion of steel ingots, featuring a more uniform structure and higher strength. They are more suitable for high-pressure or critical fluid applications. Despite their higher cost, they perform more stably and reliably in high-demand environments.

A53 ERW carbon steel pipe, with its cost advantage and wide range of specifications, is a common preferred pipe type in pipeline engineering.