Seamless pipe, ERW pipe, spiral-welded pipe, stainless steel pipe, galvanized pipe, and coated carbon steel pipe do not have identical manufacturing characteristics or application limits. The correct choice depends on the service medium, pressure, diameter, wall thickness, structural loading, temperature, corrosion environment, joint design, applicable standard, and required service life.This guide explains the principal steel pipe applications in infrastructure development projects and international procurement teams reduce technical and commercial risk.