Blog316 Stainless Pump Casing on a Cast Iron Base: A Practical Mix
Horizontal pipeline pumps built with a 316 stainless steel casing and a cast iron foot. Why you only need stainless where the liquid touches the pump.

Model: IHG vertical stainless steel chemical pipeline pump
The IHG is the stainless steel pipeline pump for corrosive liquids. Choosing 304 or 316, checking chemical compatibility, and two real IHG orders.
| Flow Rate | Same hydraulic range as ISG |
|---|---|
| Head | Up to 128 m |
| Power | 0.55 to 250 kW |
| Inlet / Outlet Diameter | DN25 to DN400 |
| Material | Stainless steel 304 or 316 wetted parts |
Not sure this pump fits your duty? Try the pump selector
When the liquid would corrode cast iron, the pipeline pump is built with stainless steel wetted parts and becomes an IHG. The hydraulics, sizes and model numbers stay the same as the ISG, so a duty can be moved from cast iron to stainless without changing the pipework.
304 stainless steel suits many mild chemicals and clean process liquids. 316, with its molybdenum content, is the safer choice where chlorides are present or the chemistry is more aggressive. Stainless steel is not resistant to everything, so name the chemical, its concentration and its temperature, and we will check the material and the seal for that duty.
| Model | Duty | Material |
|---|---|---|
| IHG125-200B | 120 m³/h at 40 m, acid and alkali liquids, system pressure 0 to 2 MPa | 304 stainless steel |
| IHG150-400B | 174 m³/h at 40 m, acid and alkali liquids, system pressure 0 to 2 MPa | 304 stainless steel |
Both duties ran at up to 2 MPa, above the standard 1.6 MPa system limit of the range, so the pressure had to be stated with the order and the build confirmed for it.
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