The Equipment Design Process
347
It is a low absorptive material and does not promote corrosion
under stainless steel or chloride cracking of austenitic stainless
steels.
This material has some permeability, however, and often deteriorates with time. Humidity during application and water entry during service often degrade its performance and its conductivity. It is
also vulnerable to a wide variety of chemicals, which could result
in deterioration of the cellular structure, reaction with the substrate,
or toxic contamination. For this reason, particular attention must be
given to the specifications and application of the weather and vapor
barriers.
Where space is a limitation, UrFo has advantages over other insulations due to the smaller thickness required.
6. CeGl: cellular glass (cellular insulation):
CeGl is suitable for hot (up to 900ºF), cold, and dual-temperature
services but it is usually the highest cost system in each of these
services.
CeGl has good compressive strength but is very brittle.
Therefore, it has a low tolerance for mechanical and thermal shock.
In vibrating service, anti-abrasive coatings must be specified with
this material.
CeGl has very low absorptivity; it does not promote chloride
cracking of austenitic stainless steel or corrosion of carbon steel. It
is therefore suitable for underground applications and is recommended for use over stainless steels. When used in cold service, a
vapor barrier is not usually required (exceptions being severe or
critical services). Care must still be taken, however, to vapor-seal the
joints.
Because it is impervious to acids and other materials, CeGl is a
suitable choice if absorption of toxic material is a concern.
7. FlEl: flexible elastomer (closed cellular insulation):
Flexible elastomer has a limited temperature range. Its good K
factor, competitive cost, low absorptivity, and the availability of
tubular shapes make it a specialized selection for freeze protection,
of plumbing systems, and chilled water and refrigeration lines up to
5 in. in diameter.
It has low compressive strength and low absorptivity. Typical
interior installations do not require a jacket covering. A weatherresistant protective coat is recommended by the manufacturer for
outdoor installations.
8. MeAm: melamine (open cellular insulation):
Melamine is commonly known as Techlite or Thermazip, and has
been used in the food industry and commercial applications on a
trial basis because of price, ease of application, and clean coloring.
347
It is a low absorptive material and does not promote corrosion
under stainless steel or chloride cracking of austenitic stainless
steels.
This material has some permeability, however, and often deteriorates with time. Humidity during application and water entry during service often degrade its performance and its conductivity. It is
also vulnerable to a wide variety of chemicals, which could result
in deterioration of the cellular structure, reaction with the substrate,
or toxic contamination. For this reason, particular attention must be
given to the specifications and application of the weather and vapor
barriers.
Where space is a limitation, UrFo has advantages over other insulations due to the smaller thickness required.
6. CeGl: cellular glass (cellular insulation):
CeGl is suitable for hot (up to 900ºF), cold, and dual-temperature
services but it is usually the highest cost system in each of these
services.
CeGl has good compressive strength but is very brittle.
Therefore, it has a low tolerance for mechanical and thermal shock.
In vibrating service, anti-abrasive coatings must be specified with
this material.
CeGl has very low absorptivity; it does not promote chloride
cracking of austenitic stainless steel or corrosion of carbon steel. It
is therefore suitable for underground applications and is recommended for use over stainless steels. When used in cold service, a
vapor barrier is not usually required (exceptions being severe or
critical services). Care must still be taken, however, to vapor-seal the
joints.
Because it is impervious to acids and other materials, CeGl is a
suitable choice if absorption of toxic material is a concern.
7. FlEl: flexible elastomer (closed cellular insulation):
Flexible elastomer has a limited temperature range. Its good K
factor, competitive cost, low absorptivity, and the availability of
tubular shapes make it a specialized selection for freeze protection,
of plumbing systems, and chilled water and refrigeration lines up to
5 in. in diameter.
It has low compressive strength and low absorptivity. Typical
interior installations do not require a jacket covering. A weatherresistant protective coat is recommended by the manufacturer for
outdoor installations.
8. MeAm: melamine (open cellular insulation):
Melamine is commonly known as Techlite or Thermazip, and has
been used in the food industry and commercial applications on a
trial basis because of price, ease of application, and clean coloring.