Having an electrical resistance great enough to limit the flow of stray electric current to safe levels, yet not so great as to prevent relaxation of static electrical charges to ground. Typically achieved using carbon-loaded layers yielding 103 to 105 ohm/m of hose length. In a flammable atmosphere the resistance from any metal connector or wand to ground should be less than 106 ohm. If only a thin inner layer of a solids transfer hose is semiconductive it should be ensured that abrasion does not cause an unacceptable increase of resistance.
Go to Process Safety Glossary