Confined-space work precautions — VPE Korea

Hi everyone. Confined spaces are areas with insufficient ventilation where oxygen deficiency, toxic gases, fire, or explosion hazards may exist—even if one wall is open, poor airflow can trap hazards (per Korean confined-space guidance).

Below about 18% oxygen, hypoxia symptoms appear; severity tracks concentration, so always measure oxygen and toxics before entry.

CO concentrations vs. health effects (refer to chart images).

H₂S concentrations vs. health effects (refer to chart images).

Other asphyxiant/toxic contributors commonly seen in confined work (refer to chart images).

Four pillars to prevent incidents
① Inventory every confined space on site.
② Ventilate and verify readings before and during work.
③ Use intrinsically safe lighting where flammable gas may exist.
④ Maintain and calibrate detectors on schedule.

Use trustworthy instruments. Wandi GasTiger 2000 offers rugged construction and proven accuracy. Remember that concentrations vary by location inside a vessel—grid the volume, including depth.

Calibrate regularly; fresh-air checks should center near 20.9% O₂. Use supplied-air or SAR when depth or IDLH potential warrants it. Most field engineers are someone’s parent or child—please internalize these rules and work without incident. Safety first!