For a pressure vessel, a lethal fluid is one that "[A] vessel is to contain fluids of such a nature that a very small amount mixed or unmixed with air is dangerous to life when inhaled[.] By "lethal substances" are meant poisonous gases or liquids of such a nature that a very small amount of the gas or of the vapour of the liquid mixed or unmixed with air is dangerous to-life when inhaled. For purposes of this Division, this class includes substances of this nature which are stored under pressure or may generate a pressure if stored in a closed vessel."
Not even close IMO when you have something for glyphosate "No more than slightly toxic and no significant adverse health effects are expected to develop if a small amount (less than a mouthful) is swallowed"
TD2K, I´m not thinking but asking since there are a lot of papers recently talking about the carcinogenic efects of this product.
As stated by ASME: "It is up to the user to determine if a service is lethal. We at Pressure Vessel Engineering do not determine if the vessel service is lethal (but we might have opinions based on previous jobs)".
Pretty much everything could be classified a lethal fluid I guess. People drown in water. Steam can easily cause life threatening burns. Nitrogen is an asphyxiant. Too much oxygen can be toxic. Etc, etc, etc.
According to Australian standards AS 4343 "Pressure equipment - Hazard levels":
"Lethal contents are classified as containing a very toxic substance or highly radio active substance which, under the expected concentration and operating conditions, is capable, on leakage, of producing death or serious irreversible harm to persons from a single short term exposure to a very small amount of the substance by inhalation or contact, even when prompt restorative measures are taken.
Very harmful contents are “containing a substance, which, under expected concentration and operating conditions, are classified as extremely or highly flammable, very toxic, toxic, harmful, oxidizing, explosive, self-reactive, corrosive, or harmful to human tissue, but excluding lethal contents.” This class includes carcinogenic, mutagenic and tetatogenic substances.
Harmful contents are “containing a substance which, under the expected concentration and operating conditions, is classified as a combustible liquid or fluid irritant to humans, or is harmful to the environment, above 90
°C, or below –30°C, but excluding lethal or very harmful fluid.
Non-harmful contents are contents not covered by the above categories except for concentration effects such as oxygen depletion and pressure."
