MS R/S Concentric ERW** refers to a Mild Steel (MS) Concentric Reducer, made using the ERW (Electric Resistance Welded) process, with R/S likely denoting Reducing Size or Reducer Seamless/Standard depending on vendor terminology.
A Concentric Reducer is a pipe fitting that joins two pipes of different diameters along the same centerline, maintaining a smooth, symmetrical transition for the flow of fluid.
📐 Breakdown of Terms:
MS – Mild Steel:
Low-carbon steel suitable for general-purpose, water, oil, and gas pipelines.
R/S – Typically means:
Reducing Size (denotes it’s a reducer)
Or in some catalogs: Reducer Seamless (if not ERW)
Concentric –
The larger and smaller pipe ends are aligned along the same axis (used in vertical or inline flow systems).
ERW – Electric Resistance Welded:
A pipe or fitting formed by welding rolled metal plate using electrical resistance without filler material.
Large end: 1" to 24" NB
Reduces to: as small as ½" NB
Schedule 20 / 40 / 80
Conforming to IS 1239, IS 3589, or ASTM standards
Plain End (PE) or Beveled End (BE) for welding
Mild Steel (Black Finish)
Optionally Galvanized (GI)