Configuration

Laminated fire resistant glass (FFB) - it is composed of two pieces or more than two pieces glass, or made up of one piece and organic material laminated, and satisfy with relevant fire resistant grade request of special glass.

Monolithic fire resistant glass (DFB) - it is composed of monolithic piece of glass, which satisfies with relevant fire resistant grade request of special glass.

Characteristic

Class A fire resistant glass: satisfy with Integrity of fire-resistant and insulating of fire-resistant request of special glass at same time.

Class B fire resistant glass: satisfy with Integrity of fire-resistant and Irradiance request of special glass at same time.

Class C fire resistant glass: satisfy with Integrity of fire-resistant request of special glass.

These three classes of fire resistant glass is graded according with fire-resistant as following: GradeⅠ, Grade Ⅱ, Grade Ⅲ, Grade Ⅳ.

Sign Illustration

Thickness 15mm glass, Class A of fire-resistant characteristic and GradeⅠlaminated fire resistant glass sign as followings:

FFB-15-A Ⅰ

Thickness 12mm glass, Class C of fire-resistant characteristic, and GradeⅡ monolithic fire resistant glass sign as followings:

DFB-12-C Ⅱ

Request

Different class of fire resistant glass technical request should accord with Table 1 relevant item rule.

Table 1 - Fireproof Glass Technical Request & Testing Method Clause

Original Glass Request

It can use normal flat glass, float glass, tempered glass etc as original glass to make fire resistant glass, laminated fire resistant glass also can choose monolithic fire resistant glass as original glass. Original glass should be accord with GB4871, GB11614, GB/T 9963 etc relevant standard and this standard corresponding clause rule.

Tolerances Of Size & Thickness

Inspecting of, laminated fire resistant glass size and thickness allowance tolerance should be accord with Table 2 prescribed.

Table 2 - Laminated Fireproof Glass Size & Thickness Allowance Tolerance

Inspecting of monolithic fire resistant glass size and thickness tolerance should be accord with Table 3 prescribed.

Table 3 - Monolithic Fireproof Glass Size & Thickness Allowance Tolerance

Appearance

Inspecting of laminated fire resistant glass appearance quality should be accord with Table 4 prescribed. The bubble and impurity in bonding during peripheral 15 mm are not considered.

Table 4 - Laminated Fireproof Glass Appearance Quality Request

Inspecting of monolithic fire resistant glass appearance quality should be fit for Table 5 prescribed.

Table 5 - Monolithic Fireproof Glass Appearance Quality

Fire-resistant characteristic

Inspecting of Class A fire resistant glass fire-resistant characteristic should be fit for Table 6 prescribed.

Table 6 - Class A Fire Resistant Glass (Integrity & Insulation)

Inspecting of Class B fire resistant glass fire-resistant characteristic should be fit for Table 7 prescribed.

Table 7 - Class B Fire-Resistant Glass (Integrity & Radiation)

Inspecting of Class C fire resistant glass fire-resistant characteristic should be fit for Table 8 prescribed.

Table 8 - Class C Fire-Resistant Glass (Integrity)

Curve Degree

Inspecting of laminated fire resistant glass and monolithic fire resistant glass degree of curve, arc and waveform is not more than 3 %.

Transmittance

Inspecting of transmittance of laminated fire resistant glass should be fit for Table 9 prescribed.

Table 9 - Transmittance Of Laminated Fireproof GlassTransmittance Of Laminated Fireproof Glass

Monolithic fire resistant glass transmittance should be come to an agreement by two parties.

Heat-Resistant

Inspecting of appearance quality should be fit for Table 4. Transmittance should be fit for Table 9.

Cold-Resistant

Inspecting of appearance quality should be fit for Table 4. Transmittance should be fit for Table 9.

Anti-UV

When laminated fire resistant glass use in architecture day lighting field, it should consider its anti-ultraviolet radiation characteristic.

Inspecting according with GB/T 5137-3, after tested, samples will be not appear obvious changing color, bubble and cloudy, meanwhile, fire resistant glass light transmission decrease rate is not more than 10%, please check below formula,

(a - b)/a x 100% ≤10%

a - light transmittance before ultraviolet radiation irradiating
b - light transmittance after ultraviolet radiation irradiated

Mechanics Performance

Impact Resistant Of Laminated Fire Resistant Glass

Inspecting of samples should satisfy with one of below standards

• Glass does not break
• If glass is broke, steel ball does not penetrate glass.

Impact Resistant Of Monolithic Fire Resistant Glass

Inspecting of samples is not broken.

Fragment State Of Monolithic Fire Resistant Glass

After tested, the fragment of each 50 x 50mm sample should be more than 40 pieces; fragment crossing the borderline is counted as half piece. Allowing few oblong fragments exist, but the length should be less than 75mm, and two ends should not be shape; the inclined angle of rectangle fragment extending to the edge of glass should not be more than 45^o.

Size & Thickness

Using 1 mm as min scale steel ruler or steel tapeline to measure size; thickness measured by micrometer or instrument that has the same precision with micrometer, measuring center of four edges, the result show in average of four center value, value has keep one decimal fraction.

Appearance

Under nicer light or dispersion ray, inspecting the aim distance obverse glass surface 600mm by eye.

Fire Resistant

Put the whole glass into fixed frame, then carrying on testing according with GB-12573, fire resistant glass suffer the fire height of size is more than 1100mm, width is not less than 600mm, sample should be install vertically.

In testing, the fixed frame and installed method should be the same with actual engineering configuration, meanwhile, need to note the fixed frame and installed method in drawing or the other way to record.

Curve Degree

Let glass vertical, then horizontally put ruler to measure arc, showing in percent that is height of arc compare with length of string; when measuring wave shape, the data showing in percent which is proportion from the distance trough to wave crest or the distance trough to trough.

Transmittance

Testing is accord to GB/T 2680-1994.

Heat-Resistant Of Laminated Fireproof Glass

Using three pieces of 300 x 300mm glass as sample for testing, the samples should be vertically put more than 6 hours in normal temperature, then checking appearance and note disfigurement in detail.

Put samples in constant temperature box, and take out after keep in 50^oC + 2^oC constant temperature for 6 hours.

After take out samples, vertically put in normal temperature more than 6 hours, inspecting its appearance quality and transmittance.

After tested, those three pieces of samples appearance quality are all according with ruler is qualified, if one piece of samples is unqualified, the other samples are qualified, then need to fetch three new pieces of samples to test again, until three pieces of glass are all qualified.

Cold-Resistant Of Laminated Fireproof Glass

Using three pieces of 300 x 300mm glass as sample for testing, the samples should be vertically put more than 6 hours in normal temperature, checking appearance and note disfigurement in detail.

Put samples in low temperature box, and take out after keep in -20^oC constant temperature for 6 hours.

After take out samples, vertically put in normal temperature more than 6 hours, inspecting its appearance quality and transmittance.

After testing, those three pieces of samples appearance quality are all according with ruler is qualified, if one piece of samples is unqualified, the other samples are qualified, then need to fetch three new pieces of samples to test again, until three pieces of glass are qualified.

Anti-Radiation Of Laminated Fireproof Glass

Get three pieces of glass, and test as per the point 5 of GB/T 5137.3 - 1999 way. After inspected, those three pieces of samples appearance quality are all according with ruler is qualified, if one piece of samples is unqualified, the other samples are qualified, then need to fetch three new pieces of samples to test again, until three pieces of glass are qualified.

Impact Resistant

Samples are six pieces of 610 x 610mm glass. It should be kept at 23oC + 5^oC for 4 hours, then immediately carry on testing.

Let samples put at frame which is showing at drawing 1, when fire resistant glass is different with original glass, it should let thin surface turn up toward impact substance.

Using steel ball weigh 1040g + 10g, with smooth surface. The height of laying is above samples 1000mm, from stillness condition, not add any outside force, let steel ball do free falling. Inspect its breakage state at the center of samples in range of 25 mm, each piece of glass can only be impact at one time.

After tested, in six samples, if five samples are fit for standard is calling qualified, if three samples or less than three samples are fit for standard is calling unqualified. When four samples are qualified, then need to fetch six new pieces of samples to test again, until six pieces of glass are qualified is calling eligibility.

Fragment State

Fetch 4 piece of monolithic fire resistant glass to test, samples size is 1930mm x 864mm.

Inspection is carried according to GB/T 9963.

Inspection Type

There are two types of inspection.

Delivery Inspection - Inspection item: size, thickness tolerance, appearance quality and degree of curve.

General Inspection - Inspection item is this standard prescribed all technical requested, if it has any matter same as one of below lists, it should be carry on general inspection

• When new product or old product transferred to other factory to produce, it needs to be judge trial-produce product.
• After official production, if configuration, material and process change a lot, it will affect product characteristic.
• When production is already for 3 three years
• When stop production more than half years, then come back to produce
• When the results checked by deliver inspection is different with checked by general inspection.
• Quality control department put forward to carry on general inspection

Made In One Group & Sample

Made In One Group - Fire resistant glass makeup in one group, it should have in the same material and same process.

Sample - Laminated fire resistant glass and monolithic fire resistant glass size, thickness tolerance, appearance quality and degree of curve should be sample by random sampling according with table 10.

Table 10 - Size, Thickness Tolerance, Appearance, Degree Of Curve Sampling And Decision Table

Determinant Rule

• If laminated fire resistant glass and monolithic fire resistant glass size, thickness tolerance, appearance quality and degree of curve’s number of unqualified is equal or more than number of unqualified determinant in table 10, then this batch of product size, thickness tolerance, appearance quality and degree of curve is unqualified.
• The other performance also accord with relevant rule, otherwise, this item performance is unqualified.
• If above kinds of items, among one of items is unqualified, then this batch product is unqualified.