The Equipment Design Process
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3. MJ-AL: metal jacket-aluminum:
The aluminum jacket is suitable on rigid or semirigid insulation
and on pipe or equipment at elevated temperatures indoors or outdoors. It has some resistance to mild chemicals only. One should
check for specific applications. It is attacked by both acids and
bases.
MJ-AL jacket service temperature limits exceed those of the insulation materials. Its good mechanical strength makes it suitable for
large surfaces such as tanks, ducts, or equipment. For large diameters, its strength is further enhanced by being specified in corrugated
form. It will withstand only moderate abuse; however, the specified
thickness can be increased when used in areas of high mechanical
or physical abuse.
MJ-AL is impermeable and is therefore suitable for use in wet
areas when properly sealed at the seams. It is noncombustible but
has a lower melting point than stainless steel.
MJ-AL should not be used in conjunction with stainless steel piping, in order to avoid galvanic corrosion. As it is very workable and
readily available in a complete line of fitting covers and accessories,
it is a popular selection. It is a much lower cost material than stainless steel.
4. MJ-SS: metal jacket-stainless steel:
MJ-SS is suitable for jacketing on rigid or semirigid insulation on
pipe and equipment at elevated temperatures indoors or outdoors.
It is also resistant to most organic solvents and corrosive chemicals,
but not where chlorine is present.
MJ-SS jacket service temperature limits exceed that of the insulation material. Its high mechanical strength makes it suitable for large
surfaces such as tanks, ducts, or equipment. It is this high mechanical
strength that also makes it ideal for areas of severe abuse. For large
diameters, its strength is further enhanced by being specified in corrugated form.
It is impermeable and is therefore suitable for use in wet areas
when properly sealed at the seams. Because it is noncombustible, it
can be used in areas of high fire risk, and is frequently used as a barrier on fire protection systems. It has a melting point higher than that
of MJ-AL.
MJ-SS is ideal for use in conjunction with stainless steel piping in
order to prevent galvanic corrosion.
5. PVC: fiberglass fabric laminated to PVC:
PVC (polyvinyl chloride) is suitable for jacketing on indoor preformed piping and rigid board insulation operating on pipe or equipment. However, due to ultraviolet rays, there is a maximum limitation
of 20 in. outside diameter when exposed to direct sunlight.
349
3. MJ-AL: metal jacket-aluminum:
The aluminum jacket is suitable on rigid or semirigid insulation
and on pipe or equipment at elevated temperatures indoors or outdoors. It has some resistance to mild chemicals only. One should
check for specific applications. It is attacked by both acids and
bases.
MJ-AL jacket service temperature limits exceed those of the insulation materials. Its good mechanical strength makes it suitable for
large surfaces such as tanks, ducts, or equipment. For large diameters, its strength is further enhanced by being specified in corrugated
form. It will withstand only moderate abuse; however, the specified
thickness can be increased when used in areas of high mechanical
or physical abuse.
MJ-AL is impermeable and is therefore suitable for use in wet
areas when properly sealed at the seams. It is noncombustible but
has a lower melting point than stainless steel.
MJ-AL should not be used in conjunction with stainless steel piping, in order to avoid galvanic corrosion. As it is very workable and
readily available in a complete line of fitting covers and accessories,
it is a popular selection. It is a much lower cost material than stainless steel.
4. MJ-SS: metal jacket-stainless steel:
MJ-SS is suitable for jacketing on rigid or semirigid insulation on
pipe and equipment at elevated temperatures indoors or outdoors.
It is also resistant to most organic solvents and corrosive chemicals,
but not where chlorine is present.
MJ-SS jacket service temperature limits exceed that of the insulation material. Its high mechanical strength makes it suitable for large
surfaces such as tanks, ducts, or equipment. It is this high mechanical
strength that also makes it ideal for areas of severe abuse. For large
diameters, its strength is further enhanced by being specified in corrugated form.
It is impermeable and is therefore suitable for use in wet areas
when properly sealed at the seams. Because it is noncombustible, it
can be used in areas of high fire risk, and is frequently used as a barrier on fire protection systems. It has a melting point higher than that
of MJ-AL.
MJ-SS is ideal for use in conjunction with stainless steel piping in
order to prevent galvanic corrosion.
5. PVC: fiberglass fabric laminated to PVC:
PVC (polyvinyl chloride) is suitable for jacketing on indoor preformed piping and rigid board insulation operating on pipe or equipment. However, due to ultraviolet rays, there is a maximum limitation
of 20 in. outside diameter when exposed to direct sunlight.