Detail of GB/T 8478-2020

Introduction of GB/T 8478-2020

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 8478-2008 Aluminium windows and doors. In addition to editorial changes, the following main technical changes have been made with respect to GB/T 8478-2008: ——"This standard is not applicable to explosion-proof windows and doors" is added in the scope (see Clause 1); ——"This standard may be used as reference for windows and doors for walls and vertical skylights that are not manually opened and closed" is deleted from the scope (see Clause 1 of 2008 edition); ——Terms "solar shading property", "shading coefficient of window" and "major load-bearing parts of profile cross section" and their definitions are deleted (see 3.2, 3.3 and 3.7 of 2008 edition); ——Terms "thermal insulating performance of windows and doors", "heat-shielding performance of windows and doors", "ordinary-type windows and doors", "sound-proofing windows and doors", "thermal insulating type windows and doors", "heat-insulating type windows and doors", "thermal insulating and heat-insulating type windows and doors", "fire-resistant windows and doors" and "resistance to repeat opening and closing for windows and doors" and their definitions are added (see 3.2 to 3.10); ——"Types and designations of windows and doors according to their functions" is changed to "Types and designations of windows and doors according to their main performance", and Tables 1 and 2 of 2008 edition are merged into Table 1, in which "solar shading type" is changed to "heat-insulating type", and "thermal insulating and heat-insulating type" and "fire-resistant type" are added (see 4.1.2 and Table 1; 4.1.2 and Tables 1 and 2 of 2008 edition); ——"The base material thickness of major profiles for major load-bearing frame members of external windows and doors (e.g., frame, leaf, combination transom and mullion) shall be determined by design calculation or test" is changed to "The nominal base material thickness of major profiles for major load-bearing frame members of external windows and doors shall be determined by design calculation and test" (see 5.1.2.1.1; 5.1.2.1.1 of 2008 edition); ——The requirements for the minimum measured base material thickness of major profiles are changed to the requirements for the nominal base material thickness of major profiles and the accuracy grade of permissible deviation, the requirements for the base material thickness of major profiles for external windows and doors are improved, and the requirements for the base material thickness of profiles for internal windows and doors and the accuracy grade of dimensional deviation are included; the requirements for the permissible deviation of non-wall thickness of base material for major profiles of windows and doors to be assembled are included (see 5.1.2.1; 5.1.2.1 of 2008 edition); ——"Thickness requirements for surface treatment layer of aluminum alloy profiles" is changed to "Application scope and thickness requirements for surface treatment layer of decorative finish of aluminum alloy profiles", and the application scope and thickness requirements of surface treatment layer are specified according to external and internal windows and doors respectively (see Table 4; Table 5 of 2008 edition); ——The provisions on the thickness of gas layer of insulating glass for external windows and doors and the permissible deviation of thickness of the single-cavity insulating glass are included (see 5.1.3.1); ——The requirements for sealed insulating glass unit with shading inside for external windows and doors are included (see 5.1.3.2); ——The requirements for glass of thermal insulating type, heat-insulating type, thermal insulating and heat-insulating type and fire-resistant type windows and doors are included (see 5.1.3.3 and 5.1.3.4); ——The requirements for sealing and elastic materials, e.g., sealants, sealant tapes, supporting blocks and positioning blocks, for fire-resistant windows and doors are included (see 5.1.5.3, 5.1.5.5 and 5.1.5.6); ——The requirements of "specification series" and the requirement of "giving priority to the common standard door and window dimensions specified in GB/T 30591" for single-set windows and doors are included (see 5.3.1.1 and 5.3.1.2); ——"Window and door frame width and height (inside)" and "Difference in opposite side dimensions of window and door frame width and height (inside)" are changed to "Window and door frame width and height" and "Difference in opposite side dimensions of window and door frame width and height" respectively, and "Diagonal dimension difference" is included (see Table 6; Table 7 of 2008 edition); ——The requirements for wind load resistance performance are modified, and the requirements for no damage to major load-bearing frame members under the action of 1.5P3 wind load that endanger personnel safety, the permissible deflection of glass panel being 1/60 of its short side length under the action of grading index value P3 of wind load resistance performance, and no damage to glass panel under the action of 1.5P3 wind load are included (see 5.6.1; 5.6.1 of 2008 edition); ——The required minimum water tightness of external windows and doors is included in the requirements for water tightness (see 5.6.2); ——The required minimum air tightness of windows and doors with air tightness requirements is included in the requirements for air tightness (see 5.6.3); ——The required minimum sound insulating performance of sound-proofing windows and doors is included in the airborne sound insulating performance (see 5.6.4); ——The required minimum heat transfer coefficient K of thermal insulating type windows and doors is included in the requirements for thermal insulating performance (see 5.6.5); ——The solar shading property and its grading (shading coefficient) are changed to heat shielding performance and its grading (solar heat gain coefficient), and the required minimum solar heat gain coefficient SHGC of heat-insulating type windows and doors is specified (see 5.6.6; 5.6.6 of 2008 edition); ——The requirement of "fire integrity" for fire-resistant windows and doors is added (see 5.6.7); ——The requirement of color transmission index of windows and doors with color discrimination requirements is included in the requirements for lighting performance (see 5.6.8); ——The requirements for sand and dust resistance performance are added (see 5.6.9); ——The requirements for impact resistance to windborne debris are added (see 5.6.10); ——The "impact resistance" of doors is changed to "impact resistance to soft heavy objects", the application scope is expanded from pivoted side hung type doors with glass area accounting for no more than 50% of the door leaf area to doors openable in various forms (see 5.6.11.3; 5.6.10 of 2008 edition), and the provisions on the impact direction and impact point of the door leaf are included in the performance test method (see 6.6.9.2); ——The requirements for mechanical performance, e.g., distortion resistance, diagonal deformation resistance, resistance to forced closing, impact resistance for opening limit, and static load resistance for positioning with stay arms, are added (see Tables 9 and 10 and 5.6.11.6 to 5.6.11.10); ——The "repeated opening and closing performance" is changed to "resistance to repeat opening and closing" (see 5.6.12; 5.6.9 of 2008 edition), and the grading requirements for resistance to repeat opening and closing for windows and doors are added (see Table 11); ——The "grouping, quantity and test sequence of test pieces for performance test" is revised to "test sequence", and Table 16 is deleted (see 6.7; 6.7 and Table 16 of 2008 edition); ——Table 12 "Product inspection items" is added, in which all items of end-of-manufacturing inspection and type inspection and the corresponding number of test pieces are listed respectively (see 7.1.1); ——The rules of batching and sampling for assembly dimension deviation inspection of doors, windows, frames and leaves are modified (see 7.2.1.2; 7.2.1.2 of 2008 edition); ——The rules of batching and sampling for type inspection are modified (see 7.3.2; 7.3.2 of 2008 edition); ——The "product certificate" is deleted (see 8.2 of 2008 edition); ——The "product certificate" and "product warranty" are added (see 8.2.1 and 8.2.2); ——The "QR code" is added (see 8.3); ——Annex B (informative) "Types and application scope of common sealant tapes" is added. This standard was proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China (MOHURD). This standard is under the jurisdiction of the National Technical Committee on Building Curtain Walls, Windows and Doors of Standardization Administration of China (SAC/TC 448). This standard replaces GB/T 8478-2008. The previous editions of GB/T 8478-2008 are GB/T 8478-2003 and GB/T 8479-2003. The previous editions of GB/T 8478-2003 are GB/T 8478-1987, GB/T 8480-1987 and GB/T 8482-1987, and that of GB/T 8479-2003 are GB/T 8479-1987 and GB/T 8481-1987. Aluminium windows and doors 1 Scope This standard specifies the classification and marking, requirements, test methods, inspection rules, product marking and accompanying documents, packaging, transportation and storage of aluminium windows and doors. This standard is applicable to windows and pedestrian doors that can be operated manually for external walls and indoor partition walls of buildings and to vertical roof windows. This standard is not applicable to skylights, non-vertical roof windows, rolling windows and doors, revolving doors, and special windows and doors such as fireproof windows and doors, explosion-proof windows and doors, escape windows and doors, smoke exhaust windows, and radiation shielding windows and doors. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 191 Packaging—Pictorial marking for handling of goods GB/T 4956 Non-magnetic coatings on magnetic substrates—Measurement of coating thickness—Magnetic method GB/T 5237 (All parts) Wrought aluminium alloy extruded profiles for architecture GB/T 5823 Terminology for building windows and doors GB/T 5824 Size system of opening for windows and doors in building GB/T 7106 Graduations and test methods of air permeability, watertightness, wind load resistance performance for building external windows and doors GB/T 8484 Graduation and test method for thermal insulating properties of doors and windows GB/T 8485 Graduation and test method for airborne sound insulating properties of windows and doors GB/T 9158 Test methods of mechanics performance for windows and doors in building GB/T 9969 General principles for preparation of instructions for use of industrial products GB 11614 Flat glass GB/T 11944 Insulating glass unit GB/T 11976 Graduation and test method of daylighting properties for external windows GB/T 12967.6-2008 Test methods for anodic oxidation coatings of aluminium and aluminium alloys—Part 6: Determination of color differences and appearance of colored anodic oxide films by viewing method GB/T 13306 Plates GB/T 14155 Doorsets—Soft heavy body impact test GB/T 14683 Silicone and modified silicone sealants for building GB/T 15519 Chemical conversion coatings—Black oxide coating on iron and steel—Specification and test methods GB 16776 Structural silicon sealants for building GB 23864 Firestop material GB 24266 Secondary edge silicone sealants for structurally glazed insulating glass units GB/T 24267 Building sealants for fire resistance GB/T 29048 Operating forces—Test method—windows GB/T 29049 Doorsets—Vertical load test GB/T 29530 Hinged or pivoted doors—Determination of the resistance to static torsion GB/T 29555 Test method of operating forces for doors GB/T 29737 Graduations and test method of sand and dust resistance performance for building external windows and doors GB/T 29738-2013 Graduations and test method for performance of exterior windows and doors, curtain walls impacted by windborne debris in windstorm GB/T 29739 Test method of resistance to repeat opening and closing for windows and doors GB/T 30591 Requirements for size coordination for opening of windows and doors in building GB/T 31433 General specification for building curtain walls, windows and doors GB/T 33993 Two dimensional code for commodity GB/T 38252 Test method of fire-resistant integrity for building windows and doors JC/T 881 Building sealants for joint of concrete construction JC/T 2304 Technical specification of energy efficient glass for building JG/T 255 Sealed insulating glass unit with shading inside JG/T 440 Test method for shading performance of windows and doors JG/T 455 Tempered glass for window, door and curtain wall in buildings JGJ 102 Technical code for glass curtain wall engineering JGJ 113 Technical specification for application of architectural glass JGJ/T 151 Calculation specification for thermal performance of windows, doors and glass curtain-walls 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 5823 and GB/T 5824 and the following apply. 3.1 aluminium windows and doors generic term for windows and doors with frame and leaf bar structures made of aluminum alloy profiles for building 3.2 thermal insulating performance of windows and doors ability of windows and doors to prevent heat transfer from indoor high temperature side to outdoor low temperature side in winter, characterized by heat transfer coefficient K 3.3 heat-shielding performance of windows and doors ability of windows and doors to block heat gain from solar radiation in summer, characterized by solar heat gain coefficient SHGC (total solar energy transmittance) Note: Heat-shielding performance of windows and doors in summer also includes the ability to prevent heat gain from temperature difference caused by outdoor high temperature. However, because the heat gain from temperature difference is far less than the heat gain from solar radiation, the heat-shielding performance of windows and doors is mainly characterized by its solar heat gain coefficient. 3.4 ordinary-type windows and doors only including external windows and doors with requirements for air tightness, water tightness and wind load resistance, and the following two kinds of internal windows and doors: 1) those only with requirements for air tightness performance; 2) those without requirements for air tightness, water tightness, wind load resistance, sound insulating performance, thermal insulating performance, fire integrity, etc. 3.5 sound-proofing windows and doors windows and doors with airborne sound insulating performance not less than 35 dB 3.6 thermal insulating type windows and doors windows and doors with heat transfer coefficient K less than 2.5 W/(m2·K) 3.7 heat-insulating type windows and doors windows and doors with SHGC not greater than 0.44 3.8 thermal insulating and heat-insulating type windows and doors windows and doors with heat transfer coefficient K less than 2.5 W/(m2·K) and SHGC not greater than 0.44 3.9 fire-resistant windows and doors windows and doors with fire integrity E not less than 30 min in closed state under the specified test conditions 3.10 resistance to repeat opening and closing for windows and doors ability of windows and doors to maintain their normal functions after long-term repeated opening and closing operations of operable leaves, characterized by repeated opening and closing times without deformation, failure and damage affecting normal opening and closing 3.11 major load-bearing frame member profile members such as transom, mullion, leaf stiles, and combination transom and mullion of windows and doors, which bear and transmit the gravity of windows and doors, horizontal wind load and other acting forces 3.12 major profiles profiles constituting the basic framework of door/window frame and leaf bar system, on which door/window frame and leaf stiles of opening leaf or glass, supplemental profiles and accessories are assembled, and combination transom and mullion of windows and doors 3.13 supplemental profile additional profiles that are embedded or fixed on the major profile members to transmit force or exert some functions in the door/window frame and leaf bar system Note: Profiles for glazing bead, weather strip and weather stile are commonly used supplemental profiles. 3.14 accessories for windows and doors fittings and parts for assembling windows and doors   3.15 bimetallic corrosion galvanic corrosion caused by electrodes made of different metals [GB/T 10123-2001, Definition 3.14] 3.16 verification confirmation, through the provision of objective evidence, that specified requirements have been fulfilled [GB/T 19000-2016, Definition 3.8.12] 4 Classification and marking 4.1 Classification and designation 4.1.1 Usage Windows and doors are classified into two categories according to their usage for external envelope and internal envelope: a) external windows and doors, designated as W; b) internal windows and doors, designated as N. 4.1.2 Types See Table 1 for the types and designations of windows and doors classified by their main performance.

Contents of GB/T 8478-2020

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Classification and marking 5 Requirements 6 Test methods 7 Inspection rules 8 Product marking and accompanying documents 9 Packaging, transportation and storage Annex A (Informative) Standard of common materials and accessories Annex B (Informative) Types and application scope of common sealant tapes Annex C (Informative) Facade forms and specifications of typical test pieces for type inspection of aluminium windows and doors Annex D (Informative) Main content of instructions for installation and use of aluminium windows and doors Bibliography