GB/T 7990-2013 English PDF

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GB/T 7990-2013: Vitreous and porcelain enamel -- Determination of resistance to impact
Status: Obsolete

GB/T 7990: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7990-2013	239	Add to Cart	3 days	Vitreous and porcelain enamel -- Determination of resistance to impact	Obsolete
GB/T 7990-2002	239	Add to Cart	2 days	Impact test method of glass-lined layer	Obsolete
GB/T 7990-1987	199	Add to Cart	2 days	The impact test method of glass-lined layer	Obsolete

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GB/T 7996   GB/T 23711.3   GB/T 23711.4   GB/T 7991.10   GB/T 7994.3   GB/T 7991.1   

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Older Standard (superseded by this standard): GB/T 7990-2002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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