The document discusses hazard identification, classification, and control in industrial safety analysis. It begins by explaining the UN hazard identification system and how hazards are classified based on their properties, such as explosives, flammable materials, oxidizing substances, and corrosives. The contents of a safety data sheet are then outlined, including identification information, health and physical hazard data, exposure controls, and more. Methods for controlling hazards are described, such as engineering controls, administrative measures, and personal protective equipment. PPE is explained as equipment like gloves, glasses, and coveralls that are worn to minimize exposure to workplace hazards.
Research methodology and industrial safety analysis
1. RESEARCH METHEDOLOGY AND
INDUSTRIAL SAFETY ANALYSIS(HCE22)
SUBMITTED BY
KISHAN KASUNDRA
SUBMITTED TO,
PROF. MAHADEVA RAJU G.K.
DEPARTMENT OF CHEMICAL
ENGINEERING,DSCE
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
1
2. CONTENTS:-
UN HAZARD IDENTIFICATION SYSTEM
CLASSIFICATION OF HAZARD
CONTENTS OF SAFETY DATA SHEET
CONTROL OF HAZARD
PERSONAL PROTECTIVE EQUIPMENT (PPE)
REFERENCES
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
2
3. HAZARD CLASSIFICATION EXAMPLES
Explosives UN class 1 – explosives Mononitrates, Dinitrates,
Tetranitrates, Pentanitrates,
Diamines, Pentamines
Gases UN class 2.1 - Flammable Gas Hydrogen, acetylene
UN class 2.2 – Nontoxic,
Nonflammable, Compressed gases
Carbon dioxide, nitrogen, air
UN class 2.3 – Toxic Gases Ammonia, chlorine, boron
trichloride, dinitrogen
tetroxide
UN HAZARD IDENTIFICATION SYSTEM:-
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
3
4. HAZARD CLASSIFICATION EXAMPLES
Flammable Liquids UN Class 3.1 – Flammable
liquid
Xylene, toluene, ethanol,
methanol, hexane,
acetonitrile, turpentine
Flammable Solids UN Class 4.1 – Flammable
solids
Reactive solids – metal
powders such as
magnesium,desensitised
explosives such as picric acid
UN Class 4.2 – Spontaneously
Combustible solids
UN Class 4.3 – Dangerous
when wet
Hydrides
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
4
5. HAZARD CLASSIFICATION EXAMPLES
Oxidising
Substances
UN Class 5.1 – Oxidising
Substances
Nitrates, permenganates,
chromic acid, perchloric acid
UN Class 5.2 – Organic Peroxide
Toxic
Substances
UN Class 6 – Toxic Substances Cycloheximidine, Fluoroacetic
acid, hydrogen fluoride,
sodium cyanide
Radioactive
Substances
UN Class 7 – Radioactive
substances
Uranium hexafluoride,
enriched uranium, radioactive
ores
Corrosive
Substances
UN class 8 – Corrosive substances Any acid including acetic acid,
sulfuric acid, nitric acid,
Any caustic such sodium
hydroxide, ammonia1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
5
6. CLASSIFICATION OF HAZARD:-
oThe Globally Harmonized System (GHS) was developed by the United Nations for
international standardization of hazard classification and communication.
oThe GHS classification is divided as health, environmental and physical hazards into
separate classes such as toxicity, irritation, sensitization, flammability, etc.
oThe severity of the hazard within each class is described by the category. The higher the
category number, the lower the hazard.
1) Health hazards :-
Acute Toxicity (Category 1 through 4)
•Compounds in Category 1 through 3 are identified by the Skull and Cross Bone pictogram.
They are highly toxic in small amounts and can cause serious health effects or death.
•Compounds in Category 4 are labelled with the Exclamation Mark symbol (!). They are still
harmful but cause lethal effects only after exposure to large amounts.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
6
7. Skin Corrosion / Irritation (Category 1 through 3)
•Compounds in Category 1 can cause severe skin damage. They
are marked with the Corrosion symbol.
•Compounds in Category 2 and 3 can cause reversible damage and are labelled with the
Exclamation Mark symbol.
Eye Effects
•Compounds that can cause irreversible, serious eye damage are
classified as Category 1 and are marked with the Corrosion symbol.
•Eye irritants are classified as Category 2a and 2b. They can cause reversible adverse
effects and are labelled with the Exclamation Mark.
Sensitization
•Respiratory sensitizers that can induce hypersensitivity of the
airways after inhalation are marked with the Health Hazard
symbol.
•A skin sensitizer that can induce an allergic response following skin contact is labelled with
the Exclamation Mark.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
7
8. Carcinogenicity (Category 1a, 1b and 2)
•A Category 1a compound is known to cause tumours in humans.
•Compounds in Category 1b are presumed to cause cancer in humans based
on animal carcinogenicity.
•For compounds in Category 2, there is limited evidence of human or animal
carcinogenicity.
Reproductive Toxicity (Category 1a, 1b and 2)
•A Category 1a compound is known to cause effects on human reproduction
or development.
•Compounds in Category 1b are presumed to cause such effects, based on
the results of animal experiments.
•Compounds in Category 2 are suspected to cause reproductive effects. An additional
category describes effects through lactation.
Target Organ Toxicity (Category 1 through 3)
•Chemicals in this category have significant health effects upon
single or repeated exposure that can impair the function of one
or more organs.
•Category 1 refers to chemicals that are known to cause such effects.
•Compounds in Category 2 are presumed to cause adverse effects.
•Category 3 chemicals cause only transient narcotic effects or respiratory tract irritations
and are labelled with the exclamation mark symbol.1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
8
9. 2) ENVIRONMENTAL HAZARD:-
Acute and chronic aquatic toxicity
•A substance that can cause injury or other adverse effects to
•aquatic organisms with either a short-term or long-term exposure.
•Acute aquatic toxicity Category 1 and chronic aquatic toxicity Category 1 and 2 are
labelled with the Environment symbol.
3) PHYSICAL HAZARDS:-
Corrosive to metals
A substance that will react with and damage metals. This class is
marked with the Corrosion symbol.
Explosives
•A chemical that is by itself capable of producing gas at a temperature,
pressure, and speed that it can cause serious damage to the surroundings.
•Explosives are divided into groups 1.1 through 1.6 depending on sensitivity.
•Divisions 1.1 through 1.4 are labelled with the Exploding Bomb symbol.1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
9
10. Flammables
All flammables are identified by the Flame symbol and include:
•Gases: A gas having a flammable range in air under standard conditions (20°C, 101.3 kPa).
•Aerosols: Compressed, liquefied, dissolved gas, or gas mixture in a non-refillable container
containing flammable components.
•Liquids: A liquid having a flash point of not more than 93°C / 200⁰F. Based on their flash
points, flammable liquids are assigned to Category 1 through 4.
•Solids: Solids that are readily combustible or may cause or contribute to fire through
friction. Depending on the burning rate flammable solids are assigned to category 1 or 2.
Gases under pressure
•Gases that are contained in a receptacle at a pressure not less than
280 Pa at 20°C or as a refrigerated liquid. They are identified by the
Gas Cylinder symbol.
Oxidizing gases, liquids or solids
•A chemical that in itself may not be combustible but causes or
contributes to the combustion of other materials. This class is
marked with a Flame Over a Circle symbol.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
10
11. Pyrophoric liquid or solid
A chemical that ignites within five minutes after coming into
contact with air. This class is identified by the Flame symbol.
Self-heating substances
A substance that self-heats by reacting with air Unlike pyrophorics,
it ignites only when in large amounts (kilograms) and after long
periods of time (hours or days). Compounds are marked with the
Flame symbol.
Self-reactive substance
A thermally unstable liquid or solid that can undergo an exothermic
decomposition without the participation of oxygen.
This class is divided into categories A through G.
Compounds in categories A and B possess explosive properties and are marked with the
Exploding Bomb symbol.
Categories C through G are less hazardous and are marked with the Flame symbol.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
11
12. Content of a Safety Data Sheet :-
In compliance with the new Hazard Communication Standard, SDS are divided into 16
sections and are required to provide the following information:
Identification: Product identifier used on the label; manufacturer or distributor name,
address, phone number, emergency phone number; recommended use; and restrictions on
use.
Hazard Identification: This section lists the GHS classification and hazard statements. This
section may also show the label pictograms and give any other information related to
known hazards of the product.
Composition/Information on Ingredients provides a list of all hazardous ingredients and
their concentrations or concentration ranges in the product. For each ingredient, the hazard
classification is given. Depending on the concentration, the classification for each individual
compound may be different than the classification of the mixture found under section 2.
First-Aid Measures describes potential symptoms and acute or delayed effects resulting
from exposure. It gives information on how to respond to exposure and on appropriate
medical treatment.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
12
13. Fire-Fighting Measures lists suitable extinguishing techniques and equipment as well as
potential hazards arising from a fire, such as toxic fumes.
Accidental Release Measures lists emergency procedures for responding to a spill,
required protective equipment, and basic methods of containment and cleanup.
Handling and Storage lists brief precautions for safe handling and storage.
Exposure Controls/Personal Protection This section should also give information on
personal protective equipment (PPE); e.g., appropriate respirators and gloves, and
engineering controls.
Physical and Chemical Properties lists the characteristics of the product such as colour,
boiling point, pH, and density etc.
Stability and Reactivity lists chemical stability, possibility of hazardous reactions,
conditions to avoid, incompatible materials, and hazardous decomposition products.
Toxicological Information describes possible routes of exposure; symptoms related to
physical, chemical and toxicological characteristics; acute and chronic effects; and
numerical measures of toxicity such as LD50 values if available.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
13
14. Ecological information includes available information on ecotoxicity, degradability,
bioaccumulation, and other adverse effects on the environment.
Disposal consideration is relevant for professional waste disposal services.
Transport information lists proper shipping name, and class.
Regulatory information includes other applicable local regulations on safety, health,
and environment.
Other information includes the date of preparation of the SDS or its last revision.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
14
17. HAZARD CONTROL:-
oA hazard control consists of all steps necessary to protect workers from exposure to a
substance or system.
oThe main ways to control a hazard include:
Elimination (including substitution): remove the hazard from the workplace, or
substitute (replace) hazardous materials or machines with less hazardous ones.
Engineering Controls: includes designs or modifications to plants, equipment,
ventilation systems, and processes that reduce the source of exposure.
Administrative Controls: controls that alter the way the work is done, including timing
of work, policies and other rules, and work practices such as standards and operating
procedures (including training, housekeeping, and equipment maintenance, and personal
hygiene practices).
Personal Protective Equipment: equipment worn by individuals to reduce exposure
such as contact with chemicals or exposure to noise.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
17
18. PERSONAL PROTECTIVE EQUIPMENT(PPE):-
oPersonal protective equipment, commonly referred to as "PPE", is equipment worn to
minimize exposure to hazards that cause serious workplace injuries and illnesses.
oThese injuries and illnesses may result from contact with chemical, radiological, physical,
electrical, mechanical, or other workplace hazards.
oPersonal protective equipment may include items such as gloves, safety glasses and
shoes, earplugs or muffs, hard hats, respirators, or coveralls, vests and full body suits.
1/8/2018
CHEMICAL ENGINEERING
DEPARTMENT,DSCE
18