ВУЗ:
Составители:
Рубрика:
64
Cylinder Design
Acetylene can be
safely compressed up to 275
psi when dissolved in
acetone and stored in
specially designed cylinders
filled with porous material,
such as balsa wood,
charcoal, finely shredded
asbestos, corn pith, portland
cement, or infusorial earth.
These porous filler materials
aid in the prevention of high-
pressure gas pockets forming
in the cylinder.
Fig. 4
Acetylene cylinder
Acetone is a liquid chemical that dissolves large portions of acetylene
under pressure without changing the nature of the gas. Being a liquid, acetone
can be drawn from an acetylene cylinder when it is not upright. You should
not store acetylene cylinders on their side, but if they are, you must let the
cylinder stand upright for a minimum of 2 hours before using. This allows the
acetone to settle to the bottom of the cylinder.
An example of an acetylene cylinder is shown in figure 5. These
cylinders are equipped with fusible plugs that relieve excess pressure if the
cylinder is exposed to undo heat. A common standard acetylene cylinder
contains 225 cubic feet of acetylene and weighs about 250 pounds. The
acetylene cylinder is yellow, and all compressed-gas cylinders are color-
coded for identification.
MAPP Gas
MAPP (methylacetylene-propadiene) is an all-purpose industrial fuel
having the high-flame temperature of acetylene but has the handling
characteristics of propane. Being a liquid, MAPP is sold by the pound, rather
than by the cubic foot, as with acetylene. One cylinder containing 70 pounds
of MAPP gas can accomplish the work of more than six and one-half 225-
cubic-foot acetylene cylinders; therefore, 70 pounds of MAPP gas is equal to
1,500 cubic feet of acetylene.
Страницы
- « первая
- ‹ предыдущая
- …
- 62
- 63
- 64
- 65
- 66
- …
- следующая ›
- последняя »
