Introduction To ASTM A178 ERW Steel Pipe

ASTM A178 is a specification that covers electric-resistance-welded (ERW) carbon steel and carbon manganese steel boiler and superheater tubes. These tubes are intended for use in boilers, flues, and superheaters with high-pressure service. In this passage, Union Steel Industry will introduce ASTM A178 ERW steel pipe in detail.

Chemical Composition of ASTM A178 ERW Steel Pipe:

Mechanical Properties of ASTM A178 ERW Steel Pipe:

Outside Diameter and Wall Thickness Tolerance of ASTM A178 ERW Steel Pipe:

Heat Treatment of ASTM A178 ERW Steel Pipe:

ASTM A178 ERW steel pipes are required to undergo the electric-resistance welding process. Subsequent to welding, all pipes must undergo a heat treatment at a temperature equal to or exceeding 1650°F [900°C], followed by either air cooling or cooling within the controlled atmosphere of a furnace. In the case of cold-drawn tubes, a heat treatment is mandated after the final cold-draw pass at a temperature of 1200°F [650°C] or higher.

Testing and Inspection of ASTM A178 ERW Steel Pipe:

- Flattening tests

- Flaring tests

- Hardness tests

- Nondestructive electric tests

Application of ASTM A178 ERW Steel Pipe:

ASTM A178 ERW steel pipes are primarily used for conveying steam, water, gas, and other fluids at high temperatures and pressures in boilers and superheaters.