CHEMICAL PROTECTIVE CLOTHING Helen Verstraelen. CHEMICAL PROTECTIVE CLOTHING Purpose: Shield or isolate individuals from the chemical, physical, and biological.

CHEMICAL PROTECTIVE CLOTHING

Helen Verstraelen

CHEMICAL PROTECTIVE CLOTHING

• Purpose:• Shield or isolate individuals from the chemical, physical,

and biological hazards that may be encountered during hazardous materials operations

• Not always apparent when exposure occurs. • Many chemicals pose invisible hazards and offer no

warning properties.

• No single combination of protective equipment and clothing is capable of protecting against all hazards.

CHEMICAL PROTECTIVE CLOTHING

• Protective clothing should be used in conjunction with other protective methods:• Engineering or administrative controls to limit chemical

contact (prevention)• The use of protective clothing can itself create significant

wearer hazards, such as heat stress, physical and psychological stress, in addition to impaired vision, mobility, and communication.

• In general, the greater the level of chemical protective clothing, the greater the associated risks.

• For any given situation, equipment and clothing should be selected that provide an adequate level of protection.

• Overprotection as well as under-protection can be hazardous and should be avoided.

CHEMICAL PROTECTIVE CLOTHING

• Protective clothing must be worn whenever the wearer faces potential hazards arising from chemical exposure. Some examples include:• Chemical sampling / monitoring• Emergency response

• Fire• Overflow / Spill• Leakage• Rescue• Decontamination

CHEMICAL PROTECTIVE CLOTHING

• Intergration clothing and equipment• Task performance is necessary• Ensemble may include:

• Protective clothing (suit, coveralls, hoods, gloves, boots)• Respiratory equipment (SCBA, combination SCBA/SAR, air

purifying respirators) • Cooling system (ice vest, air circulation, water circulation)• Communications device• Head protection• Eye protection• Ear protection • Inner garment• Outer protection (overgloves, overboots, flashcover).

VAPOUR PROTECTIVE SUIT

• Pressure-demand, full-face SCBA, inner chemical-resistant gloves, chemical-resistant safety boots, two-way radio communication

• Highest available level of respiratory, skin, and eye protection from solid, liquid and gaseous chemicals. • High level of hazards to respiratory system, skin and eyes. • Substances are present with known or suspected skin toxicity

or carcinogenity. • Operations conducted in confined or poorly ventilated areas.

• Ensemble items must allow integration without loss of performance.

VAPOUR PROTECTIVE SUIT

VAPOUR PROTECTIVE SUIT

EXMPLE HIMEX

blue: protection against abrasionpink: chemical barrieryellow: makes material stronggrey: makes material smooth, easy to clean and gives extra chemical protection

VAPOUR PROTECTIVE SUIT

HIMEX UVEX

VAPOUR PROTECTIVE SUIT

DECONTAMINATION

DOFFING SUIT

• With subject standing, unzip the suit completely. • From the rear, place a gloved hand on the back of

the subject’s head and invert the hood. • From the front, roll the suit down over the shoulders.

(turning it entirely inside out)• Pull arms out• Once the knees are clear the subject may sit down. • Complete rolling suit down over the boots. pull the

boots off using the inverted suit.   • Subject removes the mask

LIQUID SPLASH PROTECTIVE SUIT

• Provides same level of respiratory protection but less skin protection. Liquid splash protection, but no protection against vapours or gases

• Chemicals do not require a high level of skin protection.

• Primary hazards are associated with liquid contact, not with vapour

• Intergration without loss of performance must be possible

LIQUID SPLASH PROTECTIVE SUIT

SUPPORT FUNCTION PROTECTIVE GARNMENT

• Same level of skin protection, but lower level of respiratory protection.

• Protection against liquids, not against vapours or gases

• Hazards have been completely identified• Chemical concentrations must be under TLV and

O2 content above 19.5%

SUPPORT FUNCTION PROTECTIVE GARNMENT

GLOVESChemical resistant gloves Material Generally suitable for

Butyl rubber Aldehydes, Carboxylic acids, Glycols and ethers, Hydroxyl compounds and alcohols, Peroxides

Natural rubber Acetone, Acohols, Alkalies and Caustics, Ammonium fluoride, Dimethyl sulphoxide, Phenol, Plating solutions

Neoprene Alcohols, Alkalies and caustics, Cellosolve Degreasing solvents, Mineral acids, Oils Plating solutions

Nitrile rubber

Alcohols, Ammonium fluoride, Freons, Hexane Hydrofluoric and hydrochloric acid Perchloric acid, Perchloroethylene Phosphoric acid, Potassium and Sodium Hydroxide, Water soluble materials, dilute acids and bases

Vinyl General prevention of contamination Medical examination, Nuisance materials

LIMITATIONS

• Performance protection• longest breakthrough not always most practical choise

• Test facilities real conditions • mechanical stresses• high temperature• chemical mixtures• ...

• Re-use of protective equipment• Decontamination procedures