MS Pipe IS 1239 refers to the Indian Standard for mild steel pipes used in water supply, gas supply, and other general engineering applications. Here's a summary of the standard: - MS Pipe IS 1239 covers pipes with a nominal bore range of 1/8 inch to 20 inches (3 mm to 500 mm). - The standard specifies the chemical composition limits for elements like carbon, manganese, phosphorus, and sulfur. - Mechanical properties like tensile strength, yield strength, and elongation at break are defined. - The standard includes requirements for: - Dimensions and tolerances - Thickness and weight - Length and ends - Material and manufacture (including welding and testing) - Hydrostatic testing and inspection The pipes are classified into three categories: - Light (L) - Medium (M) - Heavy (H) Each category has different thickness and weight requirements. If you have specific questions or need further details, please ask!