IS 1239
/glossary/is-1239BIS standard governing mild steel tubes for water, gas and sewage applications in India.
In detail
IS 1239 (Parts 1 and 2) is the Bureau of Indian Standards specification for mild steel tubes used in water, gas and sewage conveyance. Part 1 covers steel tubes with outside diameter up to 150 mm, while Part 2 covers tubes above 150 mm. The standard defines light, medium and heavy classes based on wall thickness, and specifies material grades, dimensions, and testing requirements for ERW pipes in Indian plumbing and industrial applications.
Where you'll meet this in procurement
You will meet IS 1239 when a buyer, consultant, or mill quote names a governing specification. Confirm which revision applies, what tests the standard requires, and whether the grade on the MTC actually matches the IS 1239 call-out on the RFQ before you lock commercial terms.