Before 2019, the country did not have relevant specifications for eyewashes, and the relevant specifications for eyewashes in the past were all referenced to ANSI Z358.1-2004. On December 10, 2019, the “GBT 38144.1-2019 Eye and Face Protection Emergency Spray and EyeWash Equipment Part 1: Technical Requirements” and “GBT 38144.2-2019 Eye and Face Protection Emergency Spray and EyeWash Equipment Part 2: User Guide” were issued, which will be implemented on July 1, 2020, so how to classify eyewashes? What are the requirements for settings and what are the requirements for use?
1. Classification of eyewash:
According to the different spray areas, it can be divided into emergency sprayers, eye washers, eye washes/face washers and compound devices.
According to the different water supply methods, it can be divided into water supply type and self-capacitance type.
This article will be described in a more comprehensive composite device.
2. Installation requirements and water quantity requirements
Emergency sprinkler head installation height: 2080-2440mm
Eyewash nozzle installation height: 838-1143mm
Spray valve drive height requirements: maximum 1730mm
Eyewash sprinkler distance from walls and obstacles: minimum 153mm
The distance between the center of the emergency sprinkler outlet and the wall and obstacles: minimum 410mm
Emergency sprinkler head water requirement: 76L/min, lasting 15min
Eyewash sprinkler water quantity requirements: 1.5L/min, lasting 15min
Personnel can enter the equipment from three directions for operation.
3. Valve control requirements:
Once the valve is opened, it should always be opened, except in cases where the user intentionally closes. The valve should be corrosion resistant, easy to operate, and fully open in 1s of time.
4. Water temperature requirements:
The suitable temperature range of the emergency spray and eyewash equipment inlet rinsing fluid is 16 ° C -38 ° C, and although the temperature is lower than 16 ° C, it can immediately slow down the chemical reaction speed, but the long-term exposure to cold liquid will affect the body temperature required by the human body, resulting in premature interruption of emergency treatment. Temperatures above 38°C have been shown to cause damage to the eyes and may accelerate the chemical reaction of harmful substances in the eyes and on the skin.
If the ambient temperature is higher than 38 °C, it is advisable to choose equipment equipped with high temperature protection devices, or to carry out appropriate cooling or heat preservation treatment of the equipment.
If there is a possibility of icing of the flushing liquid, it is advisable to choose equipment with antifreeze protection (self-emptying, antifreeze protection valve) and carry out thermal insulation treatment.
If there is a possibility of long-term icing, it is advisable to choose equipment with antifreeze protection (electric heat trace insulation) or appropriate heat trace heat preservation treatment.
5. Set the requirements of the distance:
(1) It is advisable to install in the area reachable within 10s of the personnel, and be on the same plane as the area where danger may occur (not one upstairs and one downstairs), and at the same time consider avoiding obstacles in the route to the equipment, considering the physical condition and emotions of the victim (in the case of visual impairment, there is a certain degree of pain and panic), and the possibility of on-site personnel assistance. Under normal circumstances, when a person walks at a normal pace, he can walk 15m in 10s.
(2) Installation needs to consider the potential danger of personnel on the route to the equipment may bring greater damage, reduce obstacles.
(3) Emergency equipment should be installed in a position close to the danger, but it should be taken into account that there may be a danger of splashing around or other dangers when using the equipment (exposed electrical conductors, etc.)
6. Obvious identification plates should be set up in the eyewash installation position.