GB according to GB 8624-1997 "burning building materials performance level, name and test methods" in 6.4 with foam pipe insulation:
|
level |
name |
test |
|
A
B1
B2
B3
|
noncombustible materials
Retardant materials
Combustible materials
Flammable materials |
GB / T 5464
GB / T 2406, GB / T 8333 GB / T 8627
GB / T 2406, GB / T 8332
Not tested |
|
test |
determine indicators |
combustion performance levels |
|
GB / T 2406
GB / T 8333
GB / T 8627 |
a) oxygen index ≥ 32
b) the average burning time ≤ 30s, height ≤ 250mm
c) smoke density register (SDR) ≤ 75 |
B1 |
|
GB / T 2406
GB / T 8332
|
a) oxygen index ≥ 26
b) the average burning time ≤ 90s, a high degree of ≤ 50mm |
B2 |
Pipeline Insulation foam burning with visual distinction between the performance of classification:
|
level |
misnomer |
combustion phenomenon |
|
B1
B2
B3
|
retardant
Flame-retardant, self-extinguishing
- |
flame to leave immediately without combustion, burned part of carbonation, no shrinkage, no high-temperature droplet combustion flue gas generated from time to time
2s after the departure of the flame inside the self-extinguishing, burned part of the significant setback, there are high-temperature droplet, combustion flue gas generated significant
Flame to continue burning after the departure of |
by the National Fire Protection Building Materials Quality Supervision, Inspection and Test Center tests, Armstrong Rubber and Plastic foam insulation materials combustion performance of GB8624-1997 flame retardant B1 level, toxic gas to reach the Ministry of Public Security industry standard GA 132-1996 ZA3 quasi-security level.
|
combustion properties |
retardant B1 level requirements |
measured |
|
oxygen index%
Vertical burning time s
A high degree of vertical combustion mm
Smoke density rating |
≥ 32.0
≤ 30.0
≤ 250
≤ 75 |
33.4
10
80
49 |
|
smoke toxicity |
quasi-security requirements ZA3 level |
measured |
narcotic mg / l
Irritant mg / l
|
≥ 6.15
≥ 6.15 |
6.15
6.15 | |
