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JG/T 3030-1995

Chinese Standard: 'JG/T 3030-1995'
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Standard ID JG/T 3030-1995 (JG/T3030-1995)
Description (Translated English) Welded stainless steel tubes for architectural decoration
Sector / Industry Building & Construction Industry Standard (Recommended)
Classification of Chinese Standard H48;Q73
Classification of International Standard 23.040.10
Word Count Estimation 13,147
Date of Issue 1995/11/27
Date of Implementation 1996/5/1
Quoted Standard GB 222; GB 223; GB 228; GB 242; GB 244; GB 245; GB 246; GB 1031; GB 2102; GB 2975; GB/T 4239; GB/T 4334.1; GB/T 4334.2; GB/T 4334.3; GB/T 4334.4; GB/T 4334.5; GB/T 6397
Drafting Organization China Construction Machinery Corporation
Administrative Organization People's Republic of China Ministry of Construction Construction Engineering Standards and Technology focal point
Summary This standard specifies the architectural decorative stainless steel welded pipe, the pipe, rectangular pipe pipe classification (hereinafter referred to as the pipe), technical requirements, test methods, inspection rules, packaging, transportation and storage. This standard applies to architectural decoration, furniture, general mechanical parts and other decorative stainless steel pipe. Such as the wall thickness of the relevant triangle, variable diameter (embossed) shaped tubes may also refer to the use of stainless steel welded pipe.

JG/T 3030-1995
Welded Stainless Steel Tubes for
Architectural Decoration
Issued by. Ministry of Construction of PRC
Table of Contents
1 Subject Content and Applicable Scope ... 3
2 Quotation Standard ... 3
3 Classification and Model ... 4
4 Technical Requirements ... 5
5 Delivery State and Weight ... 12
6 Test Methods ... 13
7 Inspection Rules ... 14
8 Package, Transportation, Storage ... 15
Appendix A Comparison List of Stainless Steel Grade between this Standard
and other Countries’ Standards (Reference)... 16
Additional Information. ... 17
Welded Stainless Steel Tubes for
Architectural Decoration
1 Subject Content and Applicable Scope
This Standard specifies the classification, technical requirements, test methods,
inspection rules, package, transportation, storage and the like of round pipe, square
pipe, rectangular pipe (hereinafter referred to as pipe) of the welded stainless steel
pipe for architectural decoration.
This Standard is applicable to architectural decoration, furniture, general mechanical
structural components, and other welded stainless steel pipes for decoration. The
triangular, variable diameter (embossed) and other related equivalent-thickness of
shaped welded stainless steel pipe can also refer to use.
2 Quotation Standard
GB 222 Method of Sampling Steel for Determination of Chemical Composition and
Permissible Variations for Product Analysis
GB 223 Methods for Chemical Analysis of Iron, Steel and Alloy
GB 228 Method for Metal Tensile Test
GB 242 Metallic Materials-Tube - Drift Expanding Test
GB 244 Metallic Materials-Tube Bend Test
GB 245 Metallic Materials-Tube - Flanging Test
GB 246 Metallic Materials-Tube - Flattening Test
GB 1031 Surface Rouglness - Parameters and their Values
GB 2102 Acceptance Packing Marking and Quality Certification of Steel Pipe
GB 2975 Rules for Sampling in Mechanical and Technological Testing of Steel
GB 4239 Cold Rolled Stainless Steel and Heatresisting Steel Strips
Table 8 Allowable Deviation of Angle of Pipe
Grade Allowable Deviation, (°)
Normal grade ±2
Higher grade ±1
NOTE. when the allowable deviation is only + or -, then the value shall be two times of that
listed in the above table.
4.3.5 Degree of curvature
The degree of curvature of pipe shall conform to the provision of Table 9.
Table 9 Allowable Deviation of Angle of Pipe
Outer Diameter or Side Length, mm Degree of Curvature, mm/m
≤17 ---
>17 and ≤140 <2.0
>140 <2.5
4.3.6 Length The general length of pipe shall be 1~8m. The sizing length of pipe shall be 6m; the pipe with length 1~6m agreed by
the purchaser and supplier is allowed to deliver; however, the weight shall be no
greater than 5% of total weight of each batch. The sizing length and multiple length of pipe shall be within the general length;
the allowable deviation of sizing length shall be +20mm; each multiple length shall
remain notch allowance of 5~10mm; the allowable deviation of the whole length shall
add 10mm.
4.3.7 Pipe shall have no obvious torsion.
4.3.8 End appearance
Both ends of the pipe shall be perpendicular to the axis of the pipe; and shall be flat;
the minor deformation and slight defect caused by the cutting method are allowed to
4.4 Surface quality
4.4.1 The outer surface of the pipe shall be clean, free from cracks, folds,
delamination, over-pickling traces and iron scale.
4.4.2 Weld defects are allowed to repair; the pipe delivered in heat-treatment state
shall repeat the heat-treatment after repairing.
4.4.3 The pipe delivered by the normal roughness of the outer surface shall have
7.4 Batching rules
The pipes shall be performed exit-factory inspection and acceptance as per the batch;
each batch consists of the pipes with the same grade, the same size and the same
delivery state.
a. When the outer diameter or side length is less than or equals to 30mm, the
number of each batch of pipes shall not exceed 500 pieces;
b. When the outer diameter or side length is greater than or equals to 30~160mm,
the number of each batch of pipes shall not exceed 300 pieces.
7.5 Sampling quantity
The sampling quantity of each inspection of the pipe shall conform to the provision of
Table 14.
7.6 Re-inspection and judgement rules
The re-inspection and judgement rules of the pipe shall conform to the provision of GB
8 Package, Transportation, Storage
8.1 Package
The pipes shall have the internal package, which shall be clean and dry; paste the
certificate on one end of the pipe; the certificate shall include the following contents
like manufacturer name, trademark, label and inspector code. The pipe external
package mode and materials shall be agreed by both parties, the external package
shall be firm; the weight and reinforcement form shall conform to the provision of
transportation department.
8.2 Transportation
During the transporting period, the pipes shall be avoided collision, and not be pressed
by hard and sharp objects to prevent the damage of the pipes. When transporting by
open vehicle, take the rainproof and waterproof measures.
8.3 Storage
The storage warehouse of the pipes shall be clean, dry, not in contact with the corrosive
medium, not in direct contact with earth surface or cement surface; the cushion
required shall be no less than 100mm.
Additional Information.
This Standard was proposed by the Research Institu......

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