Specifying electrical properties for dust suction hoses

Technical explanation

Insulating material, moving particles and flow conditions are inputs to the electrostatic risk assessment. For products described as conductive or antistatic, it must be explained which property and test method is meant. Continuity measured along the hose is not the same as the suitability of the entire equipment for an explosive atmosphere. A metal spiral does not automatically provide grounding without a controlled connection. The requirements are matched with the manufacturer's declaration and a competent facility assessment.

Source: S036, S038

Topic-specific checkpoints

Source: S036, S038

How is it assessed in practice?

For a dust collection line, gather the conveyed dust, moisture, flow condition, fitting materials and moving sections on the same checklist. If electrical continuity is required, define how the finished assembly, not just the hose body, will be tested. Do not determine the explosive dust classification from the hose seller's estimate; obtain it from the facility's responsible specialist. Use the manufacturer's end assembly method instead of adding wire to the spiral at random. Record the result with number, date, instrument and test condition.

Original editorial recommendation; not a clause of a standard.

Frequently asked questions

Is a hose marked antistatic suitable for all explosive atmospheres?

No. This term does not provide automatic suitability for all equipment, environments and assemblies.

Source: S036, S038