In the oil and chemical process industrial, a spade is a round piece of metal with a small tab that is placed in between two pipe flanges to give positive isolation from the centre; usually to prevent cross contamination between fluids or to allow work on the line.
Spacer Ring, Spade Flange, Special Flange manufacturer Orientsteel supplies Spacer Rings Flanges, Spade Flanges, Special Flanges made in forged steel, Stainless Steel, alloy steel, etc.
