B15 Steel Fire Door
Introduction of B15 Fire Door
Class B fire doors are mainly used in crew living areas. It has the function of fire protection and weathertight. But B15 fire door is less airtight than A15 fire door. B15 fire door requirements in the fire resistance test, the average temperature rise of its backfire side within 15 minutes does not exceed 140 ℃, the temperature rise of any point on the back does not exceed 225 ℃.
Specifications of B15 Steel Fire Door
type
code
escape
venitilation
clear size L
cutout in steel wall
frame thickness D
leaf thickness d
L
B
L1
B1
B15
B15
1500~2000
500~1000
L+85
B+85
T+50
40
B15F
√
B15T
√
√
NB15
NB15F
√
NB15T
√
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