Crest Foam Industries, Inc.
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Typical physical properties of SafeCrest ESF


Baffle and inerting material, aircraft fuel tank
MIL-B-83054B (USAF)

Grade I | Grade II | Type I | Type II | Type IV | Type V
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Type IV

  Property

Specification

T15M

Color

Dark Blue

Dark Blue

Density range (lbs/ft³)

1.20 to 1.45

1.25-1.40

Porosity (Pores per inch)

8-18

14

Air pressure drop
(in. wg.)

0.140-0.230

0.20

Tensile strength (psi)

10 min

19

Ultimate elongation (percent)

100 min

170

Tear resistance (psi)

3 min

4.0

Constant deflection compression set (percent)

30 max

15

Compression load deflection at 25% (psi)

0.35 min

0.55

Compression load deflection at 65% (psi)

0.60 min

0.90

Fuel displacement (volume percent)

2.5 max

<1.0

Fuel retention
(volume percent)

2.5 max

2.1

Flammability (in/min)

15 max

13

Extractable materials (wt. percent)

3.0 max

2.6

Volume increase
(volume percent)
Type I Fluid
Type III Fluid
JP-4 turbine fuel

15
37
25

10
23
16

Low temperature flexibility

No cracking or breaking of strands

Entrained solid contamination (mg/ft³)

11.0 max

9.2

Steam autoclave exposure
(percent tensile loss)

30 max

17


Grade I | Grade II | Type I | Type II | Type IV | Type V
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Type V

  Property

Specification

T30M

Color

Light Blue

Light Blue

Density range (lbs/ft³)

1.20 to 1.45

1.20-1.40

Porosity (Pores per inch)

20-30

25

Air pressure drop
(in. wg.)

0.270-0.370

0.32

Tensile strength (psi)

15 min

19

Ultimate elongation (percent)

100 min

220

Tear resistance (psi)

3 min

4.5

Constant deflection compression set (percent)

30 max

15

Compression load deflection at 25% (psi)

0.35 min

0.55

Compression load deflection at 65% (psi)

0.60 min

0.80

Fuel displacement (volume percent)

2.5 max

<1.0

Fuel retention
(volume percent)

4.5 max

4.0

Flammability (in/min)

15 max

13

Extractable materials (wt. percent)

3.0 max

2.3

Volume increase
(volume percent)
Type I Fluid
Type III Fluid
JP-4 turbine fuel

0-15
0-37
0-25

8
27
17

Low temperature flexibility

No cracking or breaking of strands

Entrained solid contamination (mg/ft³)

11.0 max

9.3

Steam autoclave exposure
(percent tensile loss)

30 max

17

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