초록 ▼

Hose samples are tested to determine their permeability to noxious odors when used to conduct sewage. A hose sample is preferably pre-treated with methyl alcohol for several days to accelerate the rate of failure. Then the open ends of the hose sample tubular body are sealed and the tubular body is

Hose samples are tested to determine their permeability to noxious odors when used to conduct sewage. A hose sample is preferably pre-treated with methyl alcohol for several days to accelerate the rate of failure. Then the open ends of the hose sample tubular body are sealed and the tubular body is covered with a flexible generally (although not necessarily completely) sulfur-containing gas-impervious material (such as nylon film) to define a gas volume between the exterior surface of the hose and the film. Carbon disulfide, dimethyl sulfide, and/or dimethyl disulfide are introduced into the interior of the hose and allowed to stand for at least a day, and then the content of any gas in the gas volume between the exterior surface and the hose is evaluated to see if it is gas from carbon disulfide or like fluids introduced into the hose. Typically evaluation is done by making a slit in the gas impervious material just large enough for an end of a detector tube, hooking the detector tube to an evacuating pump, operating the evacuating pump to draw gas from the gas volume into the detector tube, and analyzing the withdrawn gas for carbon disulfide, etc. The slit may be resealed with the self-adhesive tape.

대표청구항 ▼

A method of testing hose samples to determine the permeability thereof to noxious odors when used to conduct sewage, each hose sample including a tubular body with open ends, an interior volume, and an exterior surface, comprising the steps of: (a) sealing the open ends of the hose sample tubular bo

A method of testing hose samples to determine the permeability thereof to noxious odors when used to conduct sewage, each hose sample including a tubular body with open ends, an interior volume, and an exterior surface, comprising the steps of: (a) sealing the open ends of the hose sample tubular body; (b) covering the tubular body with a flexible generally sulfur-containing gas-impervious material, to define a gas volume between the exterior surface of the tubular body and the gas-impervious material; (c) introducing fluid carbon disulfide, dimethyl sulfide, dimethyl disulfide, or combinations thereof, into the interior volume of the tubular body, and allowing the sealed tubular body to stand for at least about twenty four hours; and then (d) after about twenty four hours or more, evaluating the content of gas in the gas volume between the exterior surface of the tubular body and the gas impervious material to see if any of the gas in the gas volume is from fluid introduced in step (c); and comprising the further steps, prior to step (c), of (e) introducing methyl alcohol into the hose sample interior volume, (f) allowing the alcohol to stand in the hose sample for at least about twenty four hours, and then (g) emptying the alcohol from the hose sample.