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EVITP Gaskets and Piping Questions and Answers 100% Correct
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EVITP Gaskets and Piping Questions and Answers 100% Correct
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EVITP Gaskets and Piping Questionsand Answers 100% Correct
Flat Ring Gaskets
Used on both flat face and raised face flanges. Used in piping systems. In order to
remove it you only need to remove some bolts the remaining can just be
loosened.
The ring gasket is preferred over the full-face gasket for two reasons. It takes less
time to make and it is easily installed because all the bolts do not have to be
removed to allow the gasket to enter. An extension or handle left on the gasket
allows even easier handling and positioning during installation
Flange Blinds
Used to close a piping system with a gasket
Pancakes Blind
One disadvantage is the flanges have to be spread in order to remove.
Spectacle Blind
A blank metal plate comprised of a regular blind plate attached to an equal-
diameter ring by a short tab, the outline of which resembles a pair of spectacles.
,The system is designed to accommodate the binds, but requires 2 sets of gaskets
when the system is online.
Volute Blinds ADD IMAGE
Solid in constructions and seal the pump volute after you remove the pump body.
The one shown isolates the pump housing when the pump is removed for
maintenance.
Pressure Rating for the Blinds
Must meet the requirements for the system.
Purging
Prior to work on piping connections you must displace toxic or combustible
substances. _______ and ventilating are just just two methods for displacing toxic
combustible substances.
The practice of displacing potentially hazardous substances (gas or liquid) with a
substance that is non-hazardous. Introduce an inert gas (nitrogen or co2) into the
piping system and then _______ with air.
Guide For Purging
-Lockout
, -Isolate the equipment (blinds or shut offs)
When purging gases from equipment, ensure you remove pockets os liquids.
Volatile liquids can continue to evaporate into hazardous gasses.
-Use proper purging medium for the substance to be removed
-Use appropriate detectors to monitor the gases leaving the equipment.
-In the case of ventilating, monitor for the presence of toxic compounds, explosive
gases and insufficient oxygen
-If you use a SCBA in place of ventilation still monitor. Explosive situations may still
be present.
Purging Mediums
Must suit the application and equipment. Commonly nitrogen, carbon dioxide,
steam, water and air.
CO2 mixed with water forms a corrosive substance, so ensure that you take all the
safety measures
Gas Detection Equipment
When you use gas detection, you can accurately detect the presence or absence
of a variety of gasses. They can be non-hazardous, hazardous, or toxic. OH&S
requlations require that you implement procedures to safeguard against
-Potential hazards related to the presence of harmful substances
-The lack of oxygen
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