Flammable and Combustible Liquids (a)

Transcription

1 Flammable and Cmbustible Liquids (a) (18) Cmbustible liquid means any liquid having a flashpint at r abve 100 F (37.8 C). Cmbustible liquids shall be divided int tw classes as fllws: (i) Class II liquids shall include thse with flashpints at r abve 100 F (37.8 C) and belw 140 F (60 C), except any mixture having cmpnents with flashpints f 200 F (93.3 C) r higher, the vlume f which make up 99 percent r mre f the ttal vlume f the mixture. (ii) Class III liquids shall include thse with flashpints at r abve 140 F (60 C). Class III liquids are subdivided int tw subclasses: (a) Class IIIA liquids shall include thse with flashpints at r abve 140 F (60 C) and belw 200 F (93.3 C), except any mixture having cmpnents with flashpints f 200 F (93.3 C), r higher, the ttal vlume f which make up 99 percent r mre f the ttal vlume f the mixture. (b) Class IIIB liquids shall include thse with flashpints at r abve 200 F (93.3 C). This sectin des nt cver Class IIIB liquids. Where the term "Class III liquids" is used in this sectin, it shall mean nly Class IIIA liquids. (iii) When a cmbustible liquid is heated fr use t within 300 F (16.7 C) f its flashpint, it shall be handled in accrdance with the requirements fr the next lwer class f liquids. (19) Flammable liquid means any liquid having a flashpint belw 100 F (37.8 C), except any mixture having cmpnents with flashpints f 100 F (37.8 C) r higher, the ttal f which make up 99 percent r mre f the ttal vlume f the mixture. Flammable liquids shall be knwn as Class I liquids. Class I liquids are divided int three classes as fllws: (i) Class IA shall include liquids having flashpints belw 73 F (22.8 C) and having a biling pint belw 100 F (37.8 C). (ii) Class IB shall include liquids having flashpints belw 73 F (22.8 C) and having a biling pint at r abve 100 F (37.8 C). (iii) Class IC shall include liquids having flashpints at r abve 73 F (22.8 C) and belw 100 F (37.8 C). HAZARDOUS MATERIALS/ a/1-95

2 FLASH POINT -- the lwest temperature at which a flammable liquid will give ff enugh vaprs t frm an ignitable mixture with the air abve the surface f the liquid r within its cntainer. LOWER FLAMMABLE LIMIT -- the percentage f vapr in the air abve which a fire can't ccur because there isn't enugh fuel: the mixture is said t be t lean. UPPER FLAMMABLE LIMIT -- the percentage f vapr in the air abve which there isn't enugh air fr a fire: the mixture is said t be t rich. VAPOR DENSITY -- the weight f a flammable vapr cmpared t air. (). Vaprs with a high density are mre dangerus and require better ventilatin because thay tend t flw alng the flr and cllect in lw spts. PEL -- the Permissible Expsure Limit f the vapr accrding t OSHA standards, expressed in parts f vapr per millin parts f cntaminated air. The PEL is listed because many f these substances present inhalatin as well as fire hazards.

3 Classes f Sme Flammable Liquids Class IA LEL UEL 1-1 Dichlrethylene Vinylidene chlride Ethylamine < Ethyl Chlride Chlrethane Ethyl Ether Ether Ispentane < Isprpyl Chlride 2-Chlrprpane Methyl Frmate Pentane < Prpylene Oxide

4 Class IB LEL UEL Acetne Benzene Benzl Carbn Disulfide Carbn bisulfide ,2- Dichlrethylene Acetylene dichlride Ethyl Acetate Ethyl Alchl Ethanl, Grain alchl Ethyl Benzene Gasline Hexane Methyl Acetate Methyl Alchl Wd alchl, Methanl Methyl Ethyl Ketne MEK, 2-Butanne Methyl Prpyl Ketne 2-Pentanne VM&P Naphtha 76 Naphtha Octane Prpyl Acetate Isprpyl Acetate Isprpyl Alchl IPA, 2-Prpanl Tluene Tlul Butyl Acetate

5 Class IC LEL UEL Isamyl Acetate Banana Oil Amyl Alchl Pentanl Butyl Alchl Butanl Methyl Isbutyl MIBK, Hexne Ketne Naphtha (Petrleum) Mineral Spirits, Petrleum Ether Prpyl Alchl Prpanl Styrene (Mnmer) Vinyl Benzene Turpentine Xylene Xyll

6 Class II LEL UEL Isamyl Alchl Cellslve Acetate 2-Ethxyethyl acetate Cyclhexanne Fuel Oil #1 & # Fuel Oil # Fuel Oil # Kersene Naphtha (cal tar) Naphtha (High Flash) 100 Naphtha > Safety Slvent, Stddard Slvent Methyl Cellslve 2-Methxyethanl

7 Class III LEL UEL Aniline Butyl Cellslve 2-Butxyethanl Cellslve Slvent 2-Ethxyethanl Cellslve Slvent Cyclhexanl Ethylene Glycl Glycl Furfural Glycerine Glycerl Isphrne Nitrbenzene

8 Nn-Flammable Liquids* Liquid Biling Pint ( F) PEL (ppm) Cmmn Name Other Names Carbn Tetrachlride Chlrfrm Trichlrmethane Ethylene Dibrmide 1,2-Dibrmethane Methyl Chlrfrm 1,1,1-Trichlrethane Methylene Chlride Dichlrmethane Perchlrethylene Tetrachlrethylene Trichlrethylene TCE, Trichlr * Nn-flammable under nrmal cnditins. Unstabilized trichlrethylene can decmpse vilently in presence f fine aluminum pwder.