Gaskets and piping Flashcards
Flat gasket sealing ability is affected by the 3
thickness of the gasket
bolt load pressure
internal and hydrostatic end force
what type of pressures are flat face gaskets good for
low to medium
Disadvantage of pancake blind
system must be spread for clearance to install
how must spectacle blinds be installed
Installed in pairs in line
Difference between o ring and flat face gasket
O-rings sealing ability increases as internal pressure increases
Advantage of self confined ring joint
High temperature
high pressure
good for corrosive environment
5 types of gasket joint design
flat face raised face tongue and groove male and female flange ring joint
gasket used in low to moderate pressure, gasket moves freely, commonly used on cast iron flanges
flat face unconfined gasket joint
gasket commonly on piping connections and where pressure range up to 900 psi
raised face unconfined gasket joint
1/16 inch raised face flanges are for pressure up to
900
1/4 inch raise face flanges are for pressures
above 900
gasket design provides gasket with no freedom to move and is considered good for high pressure application
tongue and groove confined gasket joint
gasket is on confined on its two flat sides and on the outside edge, this design provides good support for the gasket and protection from blowout
male and female semi confined gasket joint
solid metal ring gasket have 3 designs
delta
oval
octagonal
surface finish of pipe yellow jacketed and used for underground services
coated
