JG/T 125-2017 PDF English
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| JG/T 125-2017 | English | 215 |
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Building hardware of windows and doors - Hinges
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| JG/T 125-2007 | English | 359 |
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Building hardware for windows and doors. Hinges
| Obsolete |
| JG/T 125-2000 | English | 399 |
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Hinge of rigid polyvinyl chloride window and door
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JG/T 125-2017: Building hardware of windows and doors - Hinges---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JGT125-2017
JG
BUILDING INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.060.50
Q 73
Replacing JG/T 125-2007
Building hardware of windows and doors - Hinges
ISSUED ON: JANUARY 19, 2017
IMPLEMENTED ON: JULY 01, 2017
Issued by: Ministry of Housing and Urban-Rural Development of PRC
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Classification and marking ... 7
5 Requirements ... 9
6 Test method ... 12
7 Inspection rules ... 23
8 Marking, packaging, transportation, storage ... 25
Building hardware of windows and doors - Hinges
1 Scope
This standard specifies the terms and definitions, classification and marking,
requirements, test methods, inspection rules, signs, packaging, transportation,
storage of hinges for building doors and windows.
This standard applies to hinges for building side-hung doors and inner side-
hung windows. It is not applicable to hinges for frameless side-hung glass doors,
hinges for screen doors and windows, hinges for folding doors and windows.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 5823 Terminology for building windows and doors
GB/T 14436 General principles of industrial product guarantee documents
GB/T 29048 Operating forces - Test method - windows
GB/T 29555-2013 Test method of operating forces for doors
GB/T 32223 Building hardware for windows and doors - General
requirements
3 Terms and definitions
The terms and definitions as defined in GB/T 5823 and GB/T 32223, as well as
the following terms and definitions, apply to this document.
3.1
Hinge
A device, which is used to connect the door and window frame and the door
and window sash, AND support the door and window, to realize the rotation
of the door and window sash indoors or outdoors.
[GB/T 32223-2015, Terms and definitions 3.10]
3.2
Visible hinge
The hinge, which has visible part, when the door and window sash is closed.
3.3
Concealed hinge
The hinge, which has no visible part, when the door and window sash is
closed.
4 Classification and marking
4.1 Classification and code
4.1.1 Classification by purpose
It is divided into two categories, according to purpose:
a) Door hinge, codenamed MJ;
b) Window hinge, codenamed CJ.
4.1.2 Classification by installation form
It is divided into two categories, according to the installation form:
a) Visible hinge, codenamed MZ;
b) Concealed hinge, codenamed YC.
4.1.3 Classification by load-bearing level
When classified by the bearing capacity of a set (2) of hinges, which are used
for a single door and window, take weight that is an integer multiple of 10 kg, to
indicate the bearing level (for example, when the bearing is 26 kg, it is
expressed as a level of 20 kg).
4.1.4 Classification by frequency of use
6.4 Mechanical properties
6.4.1 Rotation force
6.4.1.1 Door hinge with use frequency I
Install a set of hinges on the steel test simulated door. Apply the weight to the
load-bearing level. Open and close the door leaf 20 times. Follow the test
method of 8.1 in GB/T 29555-2013, to carry out the test, when the door leaf is
opened to 90° ± 5° OR the during the process of reaching to the design
maximum opening angle.
6.4.1.2 Visible door hinges with use frequency II, window hinges with use
frequency III
Install a set of hinges, on the test simulation door and window of corresponding
size, according to its actual load. The door hinge is tested, according to the test
method of GB/T 29555; the window hinge is tested, according to the test
method of GB/T 29048.
6.4.2 Load-bearing performance
6.4.2.1 Door hinge with use frequency I
For the door hinge specimen, with the use frequency I, after the test of the
rotational force performance, it is tested for the load-bearing performance,
according to the following requirements. The schematic diagram of the position
of the measurement point of the load deformation test, is as shown in Figure 5.
a) When loading to the load-bearing level, at the center of gravity of the door
leaf, record the horizontal distance h0 and the vertical distance v0;
b) After loading the door leaf, at the center of gravity, to 2 times the load-
bearing level AND opening and closing the door leaf 20 times, record the
horizontal distance h1 and vertical distance v1, after deformation;
c) Calculate the horizontal deformation Δh1, under the load-bearing level,
according to formula (1). Calculate the vertical deformation Δv1, under the
load-bearing level, according to formula (2);
d) After unloading, open and close the door for another 5 times. Then record
the horizontal distance h2 and vertical distance v2, after unloading and
recovery. Use the formula (3), to calculate the residual horizontal
deformation Δh2 after unloading. Use the formula (4), to calculate the
residual vertical deformation Δv2, after unloading;
Where:
Δh1 - The horizontal deformation, under 2 times the load-bearing level, in
millimeters (mm);
h1 - The horizontal distance, under 2 times the load-bearing level, in
millimeters (mm);
h0 - The horizontal distance, in the initial state, in millimeters (mm);
Where:
Δv1 - The vertical deformation, under 2 times the load-bearing level, in
millimeters (mm);
v1 - The vertical distance, under 2 times the load-bearing level, in
millimeters (mm);
v0 - The vertical distance, in the initial state, in millimeters (mm);
Where:
Δh2 - The horizontal residual deformation after unloading, in millimeters
(mm);
h2 - The horizontal distance after unloading, in millimeters (mm);
Where:
Δv2 - The vertical residual deformation after unloading, in millimeters (mm);
v2 - The vertical distance after unloading, in millimeters (mm).
e) Load 3 times the actual load-bearing weight, at the center of gravity of the
door leaf. After opening and closing the door leaf 5 times, keep it for 1 min
~ 2 min. After unloading, check the hinge for visible damage and cracks.
The whole process shall be completed, within 5 minutes.
Legends:
1 - Parts connected with the frame; 2 - Parts connected with the leaf; F - Load.
Figure 7 -- Schematic diagram of static load test of parts on upper hinge
frame
6.4.4 Repeated opening-closing
6.4.4.1 Door hinge with use frequency I
The door hinge, with use frequency I, after the test of load-bearing performance,
is repeatedly opened and closed, according to the following requirements:
a) Measure and record the rotation force, according to the test method in
6.4.1.1. Record the horizontal distance h0 and vertical distance V0 in
Figure 5;
b) Open the door leaf to the 90° ± 5° position OR the designed maximum
opening angle, through the test device. Open and close the door leaf at a
speed of (600 ± 30) times/h, for 200000 times. During the test, always
maintain the weight of the load-bearing level in 6.4.1.1. After every 10000
times, follow the requirements of instruction manual, to lubricate the
product;
c) Record the horizontal deformation distance h3 and vertical deformation
distance v3, after repeated opening and closing. Calculate the horizontal
deformation Δh3, according to formula (6). Calculate the vertical
deformation Δv3, according to formula (7);
Where:
Δh3 - The horizontal deformation after repeated opening and closing, in
millimeters (mm);
h3 - The horizontal distance after repeated opening and closing, in
millimeters (mm);
Where:
Δv3 - The vertical deformation, after repeated opening and closing, in
millimeter (mm);
v3 - The vertical distance after repeated opening and closing, in millimeters
(mm).
d) Repeat 6.4.1.1 again, to check whether the rotation force meets the
requirements;
e) Repeat item e) in 6.4.2.1 again, to check the hinge for visible damage and
cracks.
6.4.4.2 Visible door hinges with use frequency II and window hinges with
use frequency III
After testing the load-bearing performance, the visible door hinge with use
frequency II and the window hinge with use frequency III shall be repeatedly
opened and closed, according to the following requirements:
a) Use a displacement measuring instrument, which has a precision of 0.01
mm, to measure the initial position L0' of the measuring point A, as shown
in Figure 6, before the test;
b) Where there is no other device with limit function, open the door and
window leaf to the 90° ± 5° position OR the designed maximum opening
angle, through the test device; the leaf stops at (50 ± 5) mm, when it
returns to the closed position. The test frequency is 250 times/h ~ 275
times/h. In the process of repeated opening and closing tests, after
completing every 5000 test cycles, the adjustment and lubrication can be
carried out, according to the requirements in the installation method, to
observe whether the test piece has deformation or damage;
c) Use a displacement measuring instrument, which has a precision of 0.01
mm, to measure the vertical change position L1', after the test. Use the
formula (8) to calculate the change ΔL':
Where:
ΔL' - The change, in millimeters (mm);
L1' - The position reading after the test at test point, in millimeter (mm);
L0' - The initial position reading of the test point, in millimeters (mm).
7 Lifting weight of suspension end - - √ √ √
8 Opening-impact - √
9 Obstacle-impact - √
Note: "√" indicates items that need to be inspected; "-" indicates items that do not need to be inspected.
7.2 Exit-factory inspection
7.2.1 Group-batching and sampling
In accordance with the provisions of GB/T 2828.1 for the same batch, use the
normal inspection one-time sampling plan; adopt the general inspection level II;
the acceptance quality limit AQL is 4.0.
7.2.2 Judgment rules
If an inspection item does not meet the requirements of the standard, it shall
take double quantity of samples from the original batch, for re-inspection. When
the re-inspection is still unqualified, this batch of products shall be determined
as unqualified.
7.3 Type inspection
7.3.1 Timing of inspection
Type inspection shall be carried out, in one of the following situations:
a) When the new product OR the old product after trans-plant production, is
subject to trial type identification;
b) After formal production, when major changes in structure, materials, and
processes may affect product performance;
c) When the production is resumed, after suspension for half a year;
d) During normal production, it is carried out once a year;
e) When there is a major difference, between the exit-factory inspection
result and the last type inspection.
7.3.2 Group-batching and sampling scheme
Based on the same product batch and specifications, one testing unit is
randomly selected, from 3000 groups or less; two testing units are randomly
selected, from 3001 ~ 10000 groups; three testing units are randomly selected,
from 10000 groups or more. The sampling amount of each testing unit shall be
implemented, according to the following requirements:
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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