This standard specifies the classification, specifications and models, requirements, test methods, inspection rules, marking, packaging, transportation and storage of stainless steel building profiles. This standard applies to building profiles formed by cold bending of stainless steel plates and strips and is the technical basis for the design, production and inspection of stainless steel building profiles. JG/T 73-1999 Stainless Steel Building Profiles JG/T73-1999 Standard download decompression password: www.bzxz.net

JG/T73—1999
This standard is formulated in accordance with GB/T1.3-—1997 (Guidelines for Standardization Work Unit 1: Rules for Drafting and Presenting Standards Part 3: Regulations for Writing Product Standards).
This standard refers to GB/T6723--1986 "Dimensions, Shapes, Weights and Permissible Deviations of General Cold-Formed Open Steel Sections", GB/T6724+1986 "Cold-Formed Corrugated Steel Plates", GB/T6725-1992 "Technical Conditions for Cold-Formed Steel Sections", GB/T6728-1986 "Dimensions, Shapes, Weights and Permissible Deviations of Cold-Formed Hollow Steel Sections for Structures", and the technical requirements refer to GB/T5237--1993 "Aluminum Alloy Building Profiles". Appendix A of this standard It is the appendix of the standard.
This standard is proposed by the Standard and Norms Research Institute of the Ministry of Construction. This standard is managed by the China Building Standard Design Institute, the technical management unit of the Ministry of Construction's building products and equipment standards. The drafting units of this standard are: China Construction Machinery Corporation Architectural Door and Window Design Institute, Shandong Tianmu Group Corporation, Guangdong Nanhai Tongda Stainless Steel Profile Factory, Zhejiang Wangzhong Stainless Steel Machinery Co., Ltd., Guangdong Shanjian International Industry (Group) Building Materials Company, Wenzhou Yongjiu Stainless Steel Door and Window Co., Ltd., Zhejiang Guolongren Metal Stainless Steel Co., Ltd. The main drafters of this standard are: Jin Shunxing, Chen Guangqing, Xiao Ying, Liu Qinghai, Li Chaoyu, Xue Xingzhong, Yang Yang, Wang Jinxing, Liang Chunguo. This standard is entrusted to the China Construction Machinery Corporation Architectural Door and Window Design Institute for interpretation. 299
1 Scope
Construction Industry Industry Standard of the People's Republic of China Stainless Steel Architectural Profiles
Cold forming sectional
stainless steel in architectureJG/T 73 - 1999
This standard specifies the classification, specifications and models, requirements, test methods, inspection rules, marking, packaging, transportation and storage of stainless steel building profiles (hereinafter referred to as profiles). This standard applies to building profiles formed by cold bending of stainless steel plates and strips, and is the technical basis for the design, production, inspection and use of stainless steel building profiles.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/ T1804--1992--General tolerances Unmarked tolerances for linear dimensions GB/T2101-1989 General provisions for acceptance, packaging, marking and quality certificates of steel GB/T3280-1992 Cold-rolled stainless steel sheets GB/T4239--1991 Cold-rolled stainless steel and heat-resistant steel strips 3 Classification, specifications and models
3.1 Profiles are classified according to surface conditions, and their classification and surface condition codes shall comply with the provisions of Table 1. Table 1 Profile classification and surface condition codes
3.2 Specifications
Surface condition bzxz.net
The specifications of profiles shall be determined by the technical documents signed by the supply and demand parties, and shall be named by the supplier or demand party. 3.3 Model
The model of the product consists of the name code, material brand code, surface condition code, specification code and modification serial number. Approved by the Ministry of Construction of the People's Republic of China on November 5, 1999 300
2000~03-01 implementation
3.4 ​​Marking example
JG/T 73—1999
Revision serial number (in the order of Chinese phonetic capital letters A, B, C·) Specification code (width and height × length), mm
Surface state code
Material brand code
Name code (stainless steel profile)
Made with 304 stainless steel after the first modification design and manufacturing, the surface is bright, the specifications are width and height 8040, length 6m fixed-length profile, marked as:
BX304·G8040X6000A
4 Requirements
4.1 Materials
Profile materials shall comply with the provisions of GB/T3280.GB/T4239, and common stainless steel brands shall comply with the provisions of Table 2. 4.1.1
Common stainless steel grades
Usage code
OCr18Ni9
1Cr18Ni9
1Cr18Ni9Ti
00Cr19Ni10
4.1.2After negotiation between the supply and demand parties, profiles made of other grades of stainless steel can also be supplied. o0Cr17Ni14Mo20Cr17Ni12Mo2
4.1.3The wall thickness of the profile shall be determined according to the function of the profile. The wall thickness of the stainless steel door and window profile shall not be less than 0.6mm. 4.2Permissible deviation of profile section size
4.2.1The permissible deviation of profile section size shall comply with the provisions of Table 3. The use of Table 3 is shown in Appendix A (Appendix to the standard). Table 3 Allowable deviation of profile section dimensions
Allowable deviation (±)
Dimensions of measuring part
>6～12
>12~19
>19～25
>25～38
>38～50
>50～100
>100～150
>150～200
>200～25 0
Solid part
≥5～15
>15~30
Non-solid part (opening part)
Distance from measuring point to reference edge
>30～60
>60～100
>100～150
2 Dimensions without deviation shall comply with the limit deviation value of Class V in GB/T1804-1992. 4.2.2
>150～200
JG/T 73-1999
4.2.3 The cross-sectional dimensions of the profile shall be measured at a distance of not less than 150mm from the end. 4.3 Permissible deviation of profile bending angle
Permissible deviation of profile bending angle shall comply with the provisions of Table 4. Table 4 Permissible deviation of bending angle of profiles
Bending side length, mm
>10～40
>40～80
4.4 Permissible deviation of radius of bend fillet of profiles
Permissible deviation (°)
Bending fillet radius of profiles takes the outer fillet as the measurement object, and its permissible deviation shall comply with the provisions of Table 5. Table 5 Permissible deviation of radius of bend fillet of profiles
Outer fillet radius Rout
4.5 Profile length and permissible deviation
4.5.1 Profile length - generally 6m, profiles of other lengths can also be supplied. Permissible deviation
±0.12Rout
4.5.2 When profiles are delivered in fixed length or multiple lengths, it should be indicated in the contract, and the permissible deviation of the length is +50mm. 4.6 Allowable deviation of shape and position
4.6.1 Profile plane gap is shown in Figure 1. The allowable value of plane gap shall comply with the provisions of Table 6. Figure 1 Schematic diagram of plane gap
Allowable value of plane gap
Profile width 6
Note: This table is not applicable to planes with parallel parts. 4.6.2 Profile curvature
Plane gap value h1
≤0.012 6
Profile curvature measurement is shown in Figure 2. The profile curvature shall be less than 2mm per meter, and the total curvature h2 shall be less than 0.2% of the total length. Figure 2 Schematic diagram of profile curvature
4.6.3 Profile distortion
JG/T 73—1999
Profiles should not have obvious distortion that affects their use function. 4.7 Appearance quality
4.7.1 The profile surface shall not have cracks, folds, delamination, traces of over-pickling and iron oxide. 4.7.2 For profiles formed by cold bending-bite-joint forming process, the bite printing should be tightly fitted and shall not be loose or misaligned. 4.7.3 For profiles formed by cold bending-welding process, there shall be no open welding, lap welding, burn-through and serious misalignment at the weld. 4.7.4 Under natural light, at a distance of 1.2m from the profile, the profile decorative surface shall be visually inspected. Mechanical scratches, wavy surfaces, hammer marks, roller marks, residual spots and oxidation colors that affect the decorative effect are not allowed. 4.7.5 Profile surface defects are allowed to be cleaned by grinding, but their strength, surface size and appearance quality shall not be affected. 4.7.6 The ends of the profiles shall be cut flush, and minor deformations and minor defects caused by the cutting method are allowed. 4.8 Profile surface roughness
For bright surface, the surface roughness shall not be lower than No.2B surface processing grade. 5 Test method
5.1 Raw materials
The test method shall be determined in accordance with the provisions of GB/T3280.GB/T4239. 5.2 Measurement of profile cross-sectional dimensions
Use a measuring tool with an accuracy of not less than 0.02mm to measure the profile cross-sectional dimensions in accordance with the requirements of the technical drawings. 5.3 Profile plane gap measurement
Put a ruler flat on the profile plane, and use a measuring tool to measure the maximum gap between the profile plane and the ruler. 5.4 Profile curvature measurement
Put the profile on the inspection platform, reduce the profile curvature to the minimum value by its own weight, and then use a measuring tool to measure the maximum gap between the lower surface of the profile and the plane of the inspection platform.
6 Inspection rules
6.1 Inspection categories
The inspection categories are mainly type inspection and factory inspection. 6.2 Inspection items
The inspection items and measuring tools shall comply with the provisions of Table 7. 6.3 Type inspection
Type inspection should be carried out in any of the following situations. a) Trial and prototyping identification of new products,
b) Trial and prototyping identification of products for production conversion; c) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; d) During normal production, after a certain production cycle (generally three years), type inspection should be carried out periodically: e) When the product is resumed after a long period of suspension; f) When the user makes a request and the contract specifies it; g) When the national quality supervision agency proposes a type inspection requirement. 6.4 Factory inspection should be carried out within the validity period of the type inspection, otherwise the inspection result will be invalid. 6.5 Batch rules
Profiles should be inspected and accepted in batches. Each batch consists of profiles of the same brand, same specifications and dimensions, and the same surface state. The batch weight is not limited.
6.6 Sampling quantity
JG/T 73—1999
When the batch size of profiles is less than 5t, one bundle shall be randomly selected; when the batch size is 5-10t, two bundles shall be randomly selected; when the batch size is more than 10t, three bundles shall be randomly selected. Three profiles shall be randomly selected from each bundle for inspection. If there are unqualified profiles, double sampling shall be conducted. If the profiles sampled in the second sampling meet all requirements, the batch of profiles shall be judged as qualified products. If the second sampling still fails, the batch of profiles shall be judged as unqualified products. Table 7 Inspection items and measuring tools
Chapter number of this standard
Raw materials
Item content
Chemical composition
Tensile test
Intergranular corrosion test
Profile section size
Profile section bending angle
Profile section bending fillet radius
Profile length
Profile plane gap
Profile curvature
Profile appearance quality
Marking, packaging, transportation and storage
7.1 Marking
Type inspection Factory inspection
The outer packaging of the profile should have obvious markings. The markings should comply with the provisions of GB/T2101. 7.2 Packaging
Inspection methods and measuring tools
GB/T3280.GB/T4239
Accuracy 0.02mm caliper, micrometer
Angle ruler
Radius gauge
Feeler gauge, steel ruler
Visual inspection, standard sample
Profiles should be packaged, and the packaging materials should be neat, dry, and non-corrosive to the profiles. The outer packaging should be firm, and the weight and reinforcement form should comply with the regulations of the transportation department.
7.3 Transportation
Profiles should avoid collisions during transportation, should not be pressed by hard objects, prevent damage, and should have rain and waterproof measures. 7.4 Storage
7.4.1 Profiles should be placed in a ventilated, clean, and dry place, and should not come into contact with corrosive media. 7.4.2 Profiles should not directly contact the ground, and the bottom should be raised by more than 100mm. 304
A1 Classification of profile cross-sectional dimensions
Profile cross-sectional dimensions are divided into:
a) Dimensions of solid parts;
JG/T 73-1999
Appendix A
(Appendix to the standard)
How to use the allowable deviation of profile cross-sectional dimensions (Table 3) b) Dimensions of non-solid parts (opening parts). A2 Dimensions of solid parts
The allowable deviations of the dimensions of solid parts refer to the provisions of "solid parts" in Table 3. As shown in Figure A1, the allowable deviations of dimensions b and h are both the values ​​corresponding to "solid parts" in the table. Figure A1 Solid parts
A3 Dimensions of non-solid parts
The allowable deviations of the dimensions of non-solid parts (opening parts) refer to the specified values ​​of "non-solid parts" in Table 3. As shown in Figure A2, the allowable deviation value of the non-solid part dimension 6 is determined by the distance h from the measuring point to the reference edge. Figure A2 Non-solid parts2 The profile should not directly contact the ground, and the bottom should be raised by more than 100mm. 304
A1 Classification of profile cross-section dimensions
Profile cross-section dimensions are divided into:
a) Dimensions of solid parts;
JG/T 73-1999
Appendix A
(Appendix to the standard)
How to use the allowable deviation of profile cross-section dimensions (Table 3) b) Dimensions of non-solid parts (opening parts). A2 Dimensions of solid parts
The allowable deviation of the dimensions of solid parts shall refer to the provisions on "solid parts" in Table 3. As shown in Figure A1, the allowable deviations of dimensions b and h are both selected from the values ​​corresponding to "solid parts" in the table. Figure A1 Dimensions of solid parts
A3 Dimensions of non-solid parts
The allowable deviation of the dimensions of non-solid parts (opening parts) shall refer to the specified values ​​on "non-solid parts" in Table 3. As shown in Figure A2, the allowable deviation value of the non-solid part dimension 6 is determined by the distance h from the measuring point to the reference edge. Figure A2 Non-solid part2 The profile should not directly contact the ground, and the bottom should be raised by more than 100mm. 304
A1 Classification of profile cross-section dimensions
Profile cross-section dimensions are divided into:
a) Dimensions of solid parts;
JG/T 73-1999
Appendix A
(Appendix to the standard)
How to use the allowable deviation of profile cross-section dimensions (Table 3) b) Dimensions of non-solid parts (opening parts). A2 Dimensions of solid parts
The allowable deviation of the dimensions of solid parts shall refer to the provisions on "solid parts" in Table 3. As shown in Figure A1, the allowable deviations of dimensions b and h are both selected from the values ​​corresponding to "solid parts" in the table. Figure A1 Dimensions of solid parts
A3 Dimensions of non-solid parts
The allowable deviation of the dimensions of non-solid parts (opening parts) shall refer to the specified values ​​on "non-solid parts" in Table 3. As shown in Figure A2, the allowable deviation value of the non-solid part dimension 6 is determined by the distance h from the measuring point to the reference edge. Figure A2 Non-solid part
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