3M™ Glass Bubbles S35 have a density of 0.35 g/cm³ and an isostatic crush strength of 3000 psi / 206 bar. The S Series glass bubbles have smaller particle sizes than the K Series.
The high strength of 3M™ Glass Bubbles S35 (rated to 3000 psi / 206 bar) means they can survive both the rigorous demands of processing and the enormous water pressure at depth. In turn, their low thermal conductivity makes them ideal additives in insulation for pipelines and production risers helping to ensure that hot oil continues to flow to the surface, rather than cooling and slowing. Like all 3M glass bubbles, S35 glass bubbles are virtually insoluble in water or oil.
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