1.

GENERAL

1.1

This standard sets forth specifications and acceptable products for rigid, semi-rigid, and flexible insulation for use on tanks.

1.2

This standard covers systems operating at temperatures ranging from ambient to 1200 ºF (649 ºC).

1.3

This standard will address wall thickness and multiple layer recommendations.

2.

APPLICATIONS

2.1

VESSEL WALL INSULATION

A thermal calculation should be performed to determine the proper insulation thickness to ensure either personnel protection or process control. Where the insulation thickness exceeds 3", a multiple layer system is recommended.

2.1.1

COMPOSITION:

Basalt wool and organic binder which is non-combustible and asbestos free.

2.1.2

NOMINAL DENSITY:

The nominal density to be between 6 and 12 pcf.

2.1.3

MAXIMUM THERMAL CONDUCTIVITY:

The thermal conductivity shall not exceed the following for any density:

2.1.4

MAXIMUM NON-FIBROUS (SHOT) CONTENT:

The percentage content of non-fibrous material (shot) shall not exceed 20% by weight (ASTM C 1335)

2.1.5

LINEAR SHRINKAGE:

The linear shrinkage, when tested at 1200°F (649°C), shall be less than 1%.

2.1.6

STRESS CORROSION:

The material must not promote or contribute to the corrosion of austenitic stainless steel.

2.1.7

SURFACE BURNING CHARACTERISTICS:

Shall not exceed
Flame Spread  5        Smoke Developed  0

2.1.8

NOISE REDUCTION COEFFICIENT:

The NRC shall not be less than 0.95

2.1.9

WATER VAPOR SORPTION:

The water vapor sorption shall be less than 1% by weight.

APPROVED MANUFACTURE (S): FIBREX INSULATIONS, INC. or equal
Single or multiple layer -
FBX INDUSTRIAL BOARD
FBX INDUSTRIAL FLEXIBLE BATT

2.2

TANK TOP INSULATION

A thermal calculation should be performed to determine the proper insulation thickness to ensure either personnel protection or process control. Where the insulation thickness exceeds 3", a multiple layer system is recommended.

2.2.1

COMPOSITION:

Basalt wool and organic binder which is non-combustible and asbestos free.

2.2.2

NOMINAL DENSITY

The nominal density to be between 8 and 12 pcf.