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Safety & Lifesaving
Eye Wash and Safety Stations
Eye Wash and Safety Stations covers plumbed and self-contained eye wash units, eye and face wash units, drench showers, combination stations and tempered water systems that keep the flushing water at a safe temperature.
They sit beside chemical mixing areas, mud pits, battery rooms and laboratories. A used station is mostly stainless pipework, and its valves, nozzles and tempering are what decide whether it still works.
What the stations do
An emergency station floods the eyes or the body with water or flushing fluid straight after a chemical splash. The first seconds count, which is why the rules set reach distance, activation time and minimum flow for 15 minutes. On a rig the usual exposures are caustic soda, lime, acids, brines such as calcium and zinc bromide, battery acid and drilling fluid additives.
Configurations
| Type | Supply | Notes |
|---|---|---|
| Plumbed eye or eye/face wash | Potable water line | Continuous supply; needs freeze and heat protection |
| Self-contained eye wash | Gravity tank or pressurised tank | Needs fluid changes; useful where no water line runs |
| Drench shower | Water line, usually overhead | High flow; often combined with an eye wash |
| Combination station | Shower plus eye or eye/face wash | Both may run at once |
| Tempered water system | Mixing valve or heated tank | Keeps flushing water tepid |
| Personal wash bottle | Sealed bottle | Supplementary only, not a substitute |
Offshore stations are usually 316 stainless steel, with heat tracing or a heated enclosure for cold climates and shading or cooling where sun heats exposed pipework.
Key specifications from ANSI/ISEA Z358.1
| Parameter | Requirement | Units |
|---|---|---|
| Eye wash flow | At least 0.4 gpm for 15 minutes | 1.5 L/min |
| Eye/face wash flow | At least 3 gpm for 15 minutes | 11.4 L/min |
| Drench shower flow | At least 20 gpm for 15 minutes | 75.7 L/min |
| Water temperature | Tepid | 16 to 38 °C (60 to 100 °F) |
| Reach | Within 10 seconds of the hazard | About 17 m (55 ft) |
| Activation | Valve opens in 1 second or less and stays open | Hands-free once on |
Standards
- ANSI/ISEA Z358.1 is the standard most offshore specifications cite. It requires plumbed units to be activated weekly to flush the line and confirm flow. Self-contained units are maintained as their maker instructs. All units get an annual inspection against the standard.
- The EN 15154 series is the European equivalent. Parts 1 and 2 cover plumbed body showers and eye wash units. Parts 3 and 4 cover non-plumbed units.
- OSHA 29 CFR 1910.151(c) requires suitable facilities for quick drenching or flushing where corrosive materials are handled.
Failure modes and inspection
- Valves seize from scale, salt and lack of use. Check the stay-open function and the activation time.
- Nozzles clog and dust caps go missing. Check the spray pattern and height.
- Self-contained fluid degrades. Check the fluid change date and the preservative.
- Tempering valves fail hot or cold. Measure the delivered temperature over a full run.
- Pipework corrodes at welds and threaded joints. Check for leaks, pitting and drainage away from walkways.
A full test measures flow and temperature at the outlet over the full 15 minutes and checks the alarm, if one is fitted.
Documentation
- Model, materials and the declaration of compliance with Z358.1 or EN 15154.
- Weekly activation and annual inspection records.
- Tempering valve service history and set point.
- For heated enclosures, the electrical certificate and any Ex certificate.
Integration
Plumbed stations need water at the pressure the maker states. Z358.1 checks eye wash flow at 2.1 bar (30 psi). A drench shower draws enough flow to affect a small potable water system, so check pump and pipe capacity. Heat tracing, tempering valves and flow alarms need power, and in a hazardous area they need Ex certification. Plan drainage so that the flushed water does not create a slip hazard.
Refurbishment and what never to buy used
A stainless station can be refurbished with new valves, nozzles, seals, dust caps and a tempering valve, then tested for flow and temperature. Replace the flushing fluid in any self-contained unit. Never buy used personal wash bottles or opened fluid cartridges, which have expiry dates and must stay sterile.
For other chemical protection, see safety gear and clothing.
FAQ
Frequently asked questions
How often must an eye wash station be tested?
ANSI/ISEA Z358.1 requires plumbed units to be activated weekly and every unit to be inspected annually against the standard. Self-contained units follow their maker's schedule for fluid changes and checks. Keep a dated record of each test.
What flow does an emergency shower need?
An ANSI/ISEA Z358.1 drench shower must deliver at least 75.7 L/min (20 gpm) for 15 minutes. An eye wash needs at least 1.5 L/min (0.4 gpm) and an eye/face wash 11.4 L/min (3 gpm). The water must be tepid throughout.
What temperature should eye wash water be?
Z358.1 requires tepid water, between 16 and 38 °C (60 and 100 °F). Colder water discourages a full 15-minute flush, and hotter water can harm the eyes. Offshore that usually means a tempering valve or a heated enclosure.
Can a personal eye wash bottle replace a station?
No, a personal wash bottle is a supplement that buys time on the way to a station. It cannot deliver 15 minutes of flow. Keep it in date and sealed.
What should I replace on a used safety shower?
Replace the valves, nozzles, seals and dust caps, and service or replace the tempering valve. Then test flow and temperature over a full 15-minute run. Pressure test the pipework and check the welds.
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