Mild Steel (MS) pipes are versatile, low-carbon steel tubes widely used for structural fabrication, plumbing, HVAC, and scaffolding. Round Pipes: Commonly used for plumbing, water supply, and structural columns.Square & Rectangular Pipes: Also known as Hollow Sections (SHS/RHS); preferred for railings, furniture, and heavy-duty structural frames.Classification by Class: Pipes are classified by thickness into Class A (Light), Class B (Medium), and Class C (Heavy/High-pressure).