Graduation method of Building material combustibility
GB8624-1997
Basic
situation:
¡ø
revision situation
First edition was issued on 1988-02-05, implemented on
1988-10-01;Second edition 1997-04-04 was issued,
implemented on 1997-10-01.
¡ø Standard
nature
This standard is stipulated for protecting security of
persons and property. According to "National
Standardization Law", it belongs to " Compulsory
standard "which shall be earnestly implemented and
enforced in the product development, constitution and
revision of product standard system, fire control law
and product quality supervision and inspection.
¡øAccepted standards
Chinese GB8624 graduation standard in the technical
content uses non- equivalent German standards ",
DIN4102-81 first part ".
¡ø
Applicable scope
This standard is
suitable for structural material and decorative material
for various industrial and civil architectures. The
material with specific uses refers to pavement, curtain
material, plastic material of electric wire cable tube
and plastics foam material for heat insulation and
preservation. It is stressed that if using the above
specific material as wall surface or suspended ceiling,
they still had to carry on inspection and graduation
according to the non- specific use material.
special regulations to composite materials, superficial
coating materials and so on
¡ø to typical mode production of composite building
material, no matter how thickness, no matter by which
kind of production craft, they should carry on
combustion characteristic test and carry on an overall
evaluation.
¡ø to interior finish coating and other facings (like
wallpaper) attached to the base material surface in
spray coating or glued or other ways, its thickness ¡Ü
0.6mm or mass-area ratio ¡Ü 300g/m2, not considering the
influence of surface layer to combustion characteristic
and graduation of its base material. If the thickness of
its surface layer is over 0.6mm, or the influence of
surface layer to combustion characteristic and
graduation of its base material is obvious, the surface
layer together with the base material should be made a
specimen for test and to carry on an overall evaluation.
¡ø to materials carried
on a flame proofing to the surface t, its combustibility
graduation should have a test and an overall evaluation
with processed material. To fire retardant coating as
well as its performance of flame retardant, a test and
an overall evaluation may be done according related
standards. This kind of a test and an overall evaluation
is not foundation and basis for this graduation
standard, but it may be taken for a reference to an
overall evaluation to its combustion characteristic
graduation.
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