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GB/T 7990-2013: Vitreous and porcelain enamel -- Determination of resistance to impact
Status: Obsolete GB/T 7990: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7990-2013 | English | 239 |
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Vitreous and porcelain enamel -- Determination of resistance to impact
| Obsolete |
GB/T 7990-2013
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| GB/T 7990-2002 | English | 239 |
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Impact test method of glass-lined layer
| Obsolete |
GB/T 7990-2002
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| GB/T 7990-1987 | English | 199 |
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The impact test method of glass-lined layer
| Obsolete |
GB/T 7990-1987
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PDF similar to GB/T 7990-2013
Basic data | Standard ID | GB/T 7990-2013 (GB/T7990-2013) | | Description (Translated English) | Vitreous and porcelain enamel -- Determination of resistance to impact | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G94 | | Classification of International Standard | 71.120; 25.220.50 | | Word Count Estimation | 6,649 | | Older Standard (superseded by this standard) | GB/T 7990-2002 | | Quoted Standard | GB/T 308; HG/T 3105 | | Regulation (derived from) | National Standards Bulletin 2013 No. 27 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the test principle, the test device, specimen, test procedures glass lining layer resistance to mechanical shock resistance, calculated and test reports. This standard is a destructive test, the sample application as a glass-lined | GB/T 7990-2013: Vitreous and porcelain enamel -- Determination of resistance to impact---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Vitreous and porcelain enamel. Determination of resistance to impact
ICS 71.120; 25.220.50
G94
National Standards of People's Republic of China
Replacing GB/T 7990-2002
Enamel coating resistant to mechanical impact test method
Issued on. 2013-12-31
2014-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 7990-2002 "Test method for glass-lined impact-resistant layer machinery", compared with the GB/T 7990-2002, the main
Technical changes as follows.
--- Modify the ball impact point position and height impact test equipment (see 4.1);
--- Increasing the test procedure balls weighing quality requirements (see 6.1).
The standard proposed by China Petroleum and Chemical Industry Association.
The standard glass-lined equipment by the National Standardization Technical Committee (SAC/TC72) centralized.
This standard was drafted. Linyi Hongye Chemical Equipment Co., Ltd., Ningbo Mingxin Chemical Machinery Co., Ltd., Tianhua Chemical Machinery &
Automation Research and Design Institute of Chemical Industry of non-metallic materials and equipment for Quality Supervision and Inspection Center.
The main drafters. Zhang Nan, Shao Zeen, Ye Qing, Ji Yu Ting, Ma Xiaoqiang, Sun Tao.
This standard replaces the standards previously issued as follows.
--- GB/T 7990-1987, GB/T 7990-2002.
Enamel coating resistant to mechanical impact test method
Tip. This test can assess mechanical shock performance glass-lined layer, glass-lined layer and adhesion of the base metal, glass-lined layer
Residual stress overall performance.
1 Scope
This standard specifies the test principle, test equipment, samples, test procedures enamel coating resistant to mechanical shock resistance, calculated and experimental
report.
This standard is a destructive test, the sample application as a glass-lined plate Impact test object.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 308 Rolling Ball
Preparation of HG/T 3105 glass-lined steel specimens
3 Test principle
Prescribed by a ball free fall, glass-lined layer vertical impact surface of the sample, measuring glass-lined layer cracks, chalking, flaking, chipping
When the phenomenon of ball drop height, calculate the ball's whereabouts impact energy.
4 test device
4.1 Test apparatus shown in Figure 1, the role of each component are as follows.
--- Screw. adjust ball holding/releasing the height;
--- Laser rangefinder. means for determining the position of the ball at impact test board and read the ball drop height with an accuracy of 1mm;
--- Ball holder/release control. to ensure reliable holding the ball at a certain height, make the ball is released in the absence of external force freedom
whereabouts;
--- Ball. a diameter of 30mm, weight about 110g, and shall comply with the provisions of GB/T 308's;
--- Chassis. steel parts, Dimensions length, width and height are 160mm × 160mm × 50mm, hole size length, width and depth, respectively
Of 82mm × 82mm × 10mm, the hole is located in the center of the chassis, the hole placement 6mm ~ 7mm thick quartz sand, sand grain
As the standard Sieve 20 mesh to 40 mesh, sand is to ensure that the sample is placed horizontally on the chassis, the chassis can be on the base
Freedom of movement;
--- Bracket. supporting Ball holder/release unit scale fixed on the bracket;
--- Base. supporting chassis and mounting bracket;
--- Adjustment screw. adjust the level of the base.
4.2 Balance. accuracy of 0.1mg, for weighing quality balls.
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