UNI EN 13034
Work and protective clothing having pictogram EN 13034:2009 type 6 and PB 6, constitute the lowest level of chemical protection.
In particular, garments in this category are designed to provide protection from potential exposure to small amounts of light splashes, liquid aerosols or accidental splashes of non-immediately dangerous chemicals.
The field of application covers all work processes that develop chemicals that are potentially hazardous to workers’ health, distinguishing and including:
- Chemical agents;
- Dangerous chemical agents (agents for which, regardless of their classification, an occupational exposure limit value has been identified and which are potentially hazardous to workers’ health);
- Dangerous chemical preparations.
Chemical risk: what do we face?
When we talk about chemical risk in the workplace, we refer to all the health and safety risks originating from the presence of dangerous chemical agents. Article 222 of Italian Law Decree No 81 of 2008, which refers to REGULATION (EC) No 1907/2006 of 18 December 2006, defines hazardous chemical agents as
“Chemical agents classified as dangerous substances within the meaning of Legislative Decree No 52 of 3 February 1997, (…) excluding substances dangerous only for the environment; chemical agents classified as dangerous preparations within the meaning of Legislative Decree No 65 of 14 March 2003, (…) excluding preparations dangerous only for the environment and chemical agents which, although not classifiable as dangerous, may involve a risk to the safety and health of workers on account of their physicochemical or toxicological properties and of the way they are used or present in the workplace, including chemical agents that have been assigned an occupational exposure limit value.”
When to use acid restitant workwear
There are many work activities where chemical risk is relevant. In addition to the industries that deal with the production, synthesis and marketing of chemical products, there are other sectors to mention, such as:
- Clinical research laboratories and hospitals, in which reagent substances and solutions used for therapies and analysis are handled and stored;
- Construction, where enamels and solvents are used for painting and in general products for making types of cement or glues and abrasives even with high degrees of toxicity and volatility;
- Metalworking, where are used and processed metals that may contain hazardous chemicals.
Generic Requirements of the Anti-acid Accident-Resistant Workwear
Generic requirements of the Acid-retardant protective workwear:
- To be waterproof, not allowing in any way the penetration and permeation of dangerous chemicals, guaranteeing this characteristic for the entire work shift;
- To be breathable, preventing and delaying the passage of the acid agent, guaranteeing time for the operator to remove the garment in case the corrosive substance comes into contact with the fabric.
The instructions for acid-resistant workwear must contain all the necessary information about the particularity of the garment and the protection guaranteed for one or more substances.
More information about acid-resistant protective workwear
EN ISO 6530 METHOD
Before selecting the device, it may be helpful to know the permeation index, which represents the time it takes for the chemical agent to pass through the material and reach the skin.
When the pass-thorough time of the chemical agent is higher than 480 minutes (the maximum time of the test), it means that for the whole duration of the trial, the average permeation speed has not reached the normalized value, therefore the chemical did not pass through. These tests are carried out on all garments with the UNI EN 13034:2009 certification.
The acid-resistant workwear belongs to a specific class based on the time it takes for the chemical agent to permeate the fabric. Specifically:
|PROTECTION INDEX||PERMEATION TIME (MIN)|
In the following table are listed the various standards for acid-resistant clothing, divided into different categories.
|5||Tightness to solid particles||EN 13982-1||III|
|6||Limited splash resistance||EN 13034||II|
METHOD UNI EN 14325:2018
This standard classifies the performance and test methods for testing the materials used for acid-resistant protective clothing, including gloves and footwear. This standard classifies the performance and test methods for testing the materials used for acid-resistant protective clothing, including gloves and footwear.
The tests are carried out by evaluating the resistance of the materials to different cycles based on: abrasion, bending crack, bending at -30°, tearing, traction, perforation.
|6||> 2000||> 100000||> 150 N|
|5||> 1500||> 40000||> 100 N|
|4||> 1000||> 15000||> 60 N|
|3||> 500||> 5000||> 40 N|
|2||> 100||> 2500||> 20 N|
|1||> 10||> 1000||> 10 N|
|6||> 850 kPa||> 1000 N||> 250 N|
|5||> 640 kPa||> 500 N||> 150 N|
|4||> 320 kPa||> 250 N||> 100 N|
|3||> 160 kPa||> 100 N||> 50 N|
|2||> 80 kPa||> 60 N||> 10 N|
|1||> 40 kPa||> 30 N||> 5 N|
RESISTANCE TO LIQID PENETRATION – METHOD EN ISO 6530
The method allows measuring the indices of penetration and repellence of the materials.
Penetration is the process by which a chemical passes through essential holes or openings in the material.
Repellence is the ability of a material to repel liquid applied to its surface.
The test is simple: the fabric to be analyzed is placed in a gutter lined with absorbent material, inclined at 45°. Ten millilitres of liquid are poured over the surface in ten seconds. After one minute, the amount of liquid permeated into the fabric (penetration) and that of liquid dropped into the cup (repellence) are recorded as a percentage.
La prova viene eseguita con 4 sostanze chimiche definite.
|Sulfuric Acid (H2S04) 30%|
|Sodium hydroxide (NaOH) 10%|
A material is compliant if, for at least one chemical substance, it obtains: class 3 repellence and class 2 penetration (according to EN 14325).
This does not apply to PB6 partial body protective clothing (lab coats, aprons, sleeves, etc.).
|3||> 95%||< 1%|
|2||> 90%||< 5%|
|1||> 80%||< 10%|
EN 17491-4 specifies methods for determining the resistance of chemical protective clothing to penetration by sprays of liquid chemicals at two different levels of intensity.
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