Natryski bezpieczeństwa wymagania normy PN EN 15154-5
On April 20, 2020, the new European Standard PN - EN 15154-5 came into force, describing safety body showers intended for places other than laboratories. This document contains requirements for devices with an upper head, permanently connected to the water supply system, installed in places other than laboratories, e.g. in industrial plants and warehouses. In the translation of the standard into Polish by PKN, the title of the standard PN - EN 15154-5 reads: "Emergency showers Part 5: Body showers with an overhead shower head for places other than laboratories." Attention! Requirements for devices installed in laboratories are included in the PN - EN 15154-1 standard.
Safety body showers for locations other than laboratories are designed and intended to be installed in close proximity to persons working in a potentially hazardous area at risk of burns/burns and/or splashing of hazardous chemicals over all or part of the body. The primary purpose of these devices is to immediately provide sufficient flushing fluid to extinguish flames and/or flush the body after exposure to harmful substances or heat. When this happens, the injured person should seek medical care. The PN - EN 15154-5 standard specifies requirements for the installation, regulation and marking of safety showers, as well as operating and maintenance instructions to be provided by the device manufacturer.
Norma definiuje pojęcia:
- Safety shower - a device specially designed and intended to provide a flushing fluid to extinguish flames and sufficiently wash away contaminants or dilute them, rendering them harmless
- Plumbed safety body shower - a device that is permanently connected to the water supply and designed to provide sufficient water to wash the entire body
- Body shower with its own tank - self-contained, tank filled with a temporary water supply or which can optionally be connected to a permanent water supply
- Additional hand shower - a manually operated shower head attached to the end of a flexible hose that can be manually directed to wash any part of the body
- A combination emergency shower is a shower equipped with an eyewash (eyewash) as defined in 3.7 and/or an additional hand-held shower
- Eyewash, eyewash - an eyewash device, a device specially designed and intended to provide fluid for rinsing and rinsing the eyes and sufficiently wash away or dilute contaminants, rendering them harmless.
Safety showers, performance, classification
Body rinsing devices intended for installation in production plants, places where hazardous substances are handled, and warehouses should correspond to one of the three classes given in Table 2. The upper volume flow of water flowing from the shower head determines the classification of the device. All safety showers produced by Carlos Arboles SA are classified in Class III, the highest class, and have a capacity of over 100 liters per minute.
- Carlos Arboles valves are equipped with automatic flow regulators that maintain a constant water flow regardless of changes in pressure in the water supply system. The water flow from the shower is set at 110 l/min (class III). Optimum inlet pressure is 2 bar - maximum 8 bar.
- Emergency shower combination sets. For combination sets, the appropriate specified water volume flow rate must be maintained at both the body wash shower head and the eyewash device and/or the auxiliary hand shower, even if they are operated simultaneously.
A hand shower should be designed so that the outlet pressure of the water jet from the shower head is limited so as not to cause injury to the user. Its flow should be at least 10 l / min.
Design requirements for safety shower installations
- General - Depending on the work carried out on site and the location of the installation, care must be taken to avoid overheating by thermal radiation or the risk of freezing so as not to be harmful to the user, i.e. to prevent burns or hypothermia.
- Free space - the shower should be designed in such a way that the clearance between the central axis of the shower head and the nearest obstacle (wall, water pipe or other) forms a cylinder with a minimum radius of 400 mm, the height between the bottom of the shower head and the floor level of the shower tray should be 2,200 (± 100) mm.
- The activator and/or eyewash device and/or additional handheld shower are the only items that can enter this space. They cannot penetrate more than 200 mm. This free space must not contain any other elements. In the case of combined safety showers, the integrated eyewash should correspond to the installation height in accordance with the EN 15154-2 standard.
- Entrance to the shower - the width of the entrance should be at least 800 mm.
- Operating manual - the device manufacturer should provide an operating manual which, as a minimum, includes:
- piping connection instructions that must be followed to maintain the required water distribution conditions
- information needed for the shower installation to produce the minimum flow rate (for example, pressure flow rate curve)
- instructions on where to position the unit - especially in terms of visibility, accessibility and proximity to the danger zone (see A.2
- guidance on recommended installation (see A.2) and operation, cleaning and maintenance, particularly the procedure to ensure that the system remains operational in an emergency (see A.3 for cleaning guidance)
- routine testing methods and frequency (see A.4 for testing guidelines).
Temperature of water supplying safety showers
Water temperature should be regulated to minimize the risk of hypothermia while limiting the growth of bacteria such as Legionella. The water temperature should be maintained between 15°C and 37°C (and preferably between 20°C and 25°C). This temperature is provided by the Elipsa 25 thermostatic mixing valve, factory set to 25 ° C.
Guidelines for installing safety showers
- distance from chemical hazard to shower less than 20 m without steps or ramps or obstacles between them or time less than 10 s to get to shower
- devices placed in a clearly visible and easily recognizable place and, as far as possible, on a regularly traveled route, inside a hazardous area, without obstruction along the route by potential obstacles (partitions, doors, steps, corridors, etc.).
- safety showers should be shielded from sources of contamination and located away from sources of electricity; marking the route to the rescue device in accordance with national regulations (see ISO 3864-1)
- Connecting rescue devices to the plumbing requires detailed testing in terms of water flow and the ability to ensure the correct flow for each device.
- Cleaning - All components and fittings should be easy to clean by the user to prevent scale build-up and reduce the risk of microbial contamination.
Testing safety showers
Safety showers should be tested at least once a month or more frequently in accordance with national regulations if required. The following parameter should be examined: flow rate by measurement, spray pattern visual test, water quality visual test. The test must be documented.