Teledyne 4220 installation and operation guide CH 2O

4220 Flow Meter

Appendix D General Safety Procedures

Table D-1 Hazardous Gases (Continued)

			Specific		Max	Max. Safe	Explosive		Likely	Most	Simplest and
			Gravity				Range (% by		Location
	Chemical	Common		Physiological	Safe 60	8 Hour					Cheapest
Gas			or Vapor				vol. in air)		of	Common
	Formula	Properties		Effect	Min. Exposure	Exposure					Safe Method
			Density				Limits		Highest	Sources
					ppm	ppm					of Testing
			Air =1				lower/upper		Concentration
Carbon	CO2	Asphyxiant, Col-	1.53	Cannot be	40,000	5,000	—	—	At bottom;	Products	Oxygen
Dioxide		orless, odorless.		endured at 10%	to				when heated	of com-	deficiency
		When breathed		more than a	60,000				may stratify	bustion,	indicator
		in large quanti-		few minutes,					at points	sewer gas,
		ties, may cause		even if subject					above bottom.	sludge.
		acid taste.		is at rest and						Also issues
		Non-flammable.		oxygen content						from car-
		Not generally		is normal. Acts						bonaceous
		present in dan-		on respiratory						strata.
		gerous amounts		nerves.
		unless an oxygen
		deficiency exists.
Carbon	CO	Chemical	0.97	Combines with	400	50	12.5	74.0	Near top, espe-	Manufac-	CO ampoules.
Monox-		asphyxiant. Col-		hemoglobin of					cially if present	tured gas,
ide		orless, odorless,		blood. Uncon-					with illuminat-	flue gas,
		tasteless.		sciousness in					ing gas.	products
		Flammable.		30 min. at 0.2%						of com-
		Poisonous.		to 0.25%. Fatal						bustion,
				in 4 hours at						motor
				0.1%. Head-						exhausts.
				ache in few						Fires of
				hours at 0.02%.						almost any
										kind.
Carbon	CCl4	Heavy, ethereal	5.3	Intestinal	1,000	100	—	—	At bottom.	Industrial	Detectable
Tetra-Chl		odor.		upset, loss of	to					wastes,	odor
oride				consciousness,	1,500					solvent,	at low concen-
				possible renal						cleaning	trations.
				damage, respi-
				ratory failure.
Chlorine	Cl2	Irritant. Yel-	2.49	Irritates respi-	4	1	—	—	At bottom.	Chlorine	Detectable
		low-green color.		ratory tract.						cylinder	odor at low
		Choking odor		Kills most ani-						and feed	concentra-
		detectable in very		mals in a very						line leaks.	tions.
		low concentra-		short time at
		tions. Non-flam-		0.1%.
		mable.
Formal-	CH2O	Colorless, pun-	1.07	Irritating to the	—	10	7.0	73.0	Near bottom.	Incom-	Detectable
dehyde		gent suffocating		nose.						plete com-	odor.
		odor.								bustion of
										organics.
										Common
										air pollut-
										ant, fungi-
										cide.
Gasoline	C5H12	Volatile solvent.	3.0	Anesthetic	4,000	1,000	1.3	6.0	At bottom.	Service	1. Combusti-
	to	Colorless. Odor	to	effects when	to					stations,	ble gas indi-
	C9H20	noticeable at	4.0	inhaled. Rap-	7,000					garages,	cator.
		0.03%. Flamma-		idly fatal at						storage
		ble.		2.4%. Danger-						tanks,	2. Oxygen
				ous for short						houses.	deficiency
				exposure at 1.1							indicator.**
				to 2.2%.
Hydrogen	H2	Simple asphyx-	0.07	Acts mechani-	—	—	4.0	74.0	At top.	Manufac-	Combustible
		iant. Colorless,		cally to deprive						tured gas,	gas indicator.
		odorless, taste-		tissues of oxy-						sludge
		less. Flammable		gen. Does not						digestion
				support life.						tank gas,
										electroly-
										sis of
										water.
										Rarely
										from rock
										strata.
Hydrogen	HCN	Faint odor of bit-	0.93	Slight symp-	—	10	6.0	40.0	Near top.	Insecti-	Detector tube
Cyanide		ter almonds.		toms appear						cide and
		Colorless gas		upon exposure						rodenti-
				to 0.002% to						cide.
				0.004%. 0.3%
				rapidly fatal.

D-7