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GB/T 7994.2-2014 English PDF

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GB/T 7994.2-2014: Test method of glass-lined equipment -- Part 2: Gas leak test
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GB/T 7994.2-2014English139 Add to Cart 3 days [Need to translate] Test method of glass-lined equipment -- Part 2: Gas leak test Valid GB/T 7994.2-2014

PDF similar to GB/T 7994.2-2014


Standard similar to GB/T 7994.2-2014

GB/T 7996   GB/T 23711.2   GB/T 23711.3   GB/T 7991.10   GB/T 7994.3   GB/T 7991.1   

Basic data

Standard ID GB/T 7994.2-2014 (GB/T7994.2-2014)
Description (Translated English) Test method of glass-lined equipment -- Part 2: Gas leak test
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G94
Classification of International Standard 71.120.99; 25.220.50
Word Count Estimation 6,616
Date of Issue 12/5/2014
Date of Implementation 7/1/2015
Older Standard (superseded by this standard) GB/T 7995-2005
Quoted Standard GB/T 7991.6
Regulation (derived from) Announcement of Newly Approved National Standards 2014 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 requirements for glass-lined equipment pressurized air tightness test, the Joint Test methods and water/gas. This section applies to tightness testing glass-lined compression equipment.

GB/T 7994.2-2014: Test method of glass-lined equipment -- Part 2: Gas leak test

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Test method of glass-lined equipments Part 2.. Gas leak test ICS 71.120.99; 25.220.50 G94 National Standards of People's Republic of China Replacing GB/T 7995-2005 Test methods for glass-lined equipment Part 2. tightness test Part 2. Gasleaktest Issued on. 2014-12-05 2015-07-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 7994-2014 "Test method for glass-lined equipment" is divided into two parts. --- Part 1. pressure test; --- Part 2. tightness test. This section GB/T 27994 Part of. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 7995-2005 "Test method for glass-lined equipment tightness", compared with the GB/T 7995-2005, the main technical Surgery changes are as follows. --- According to the design pressure range of glass-lined pressure equipment selection test gauge accuracy class; --- Cancel the test pressure requirements; --- Based TSGR0004 "Stationary Pressure Vessel Safety Technology Supervision" on the dwell time and leak testing methods Amendments. This part is proposed by the China Petroleum and Chemical Industry Association. The glass-lined equipment in part by the National Standardization Technical Committee (SAC/TC72) centralized. This section is drafted. Ningbo Mingxin Chemical Machinery Co., Ltd., Liyang City, Jiangsu Province Yunlong Equipment Manufacturing Co., Ltd., Guangzhou special Species Pressure Equipment Inspection Institute, the town of Wenzhou Tian Machinery Co., Tianhua Chemical Machinery and Automation Research Institute Limited. The main drafters of this section. Yeh, Making Textual Criticism, Limao Dong, entry by light, Xia Tianbao, Wu Wendong, Tu Xin, Zhang Nan. This part of the standard replaces the previous editions are. --- GB/T 7995-1987, GB/T 7995-2005. Test methods for glass-lined equipment Part 2. tightness test

1 Scope

GB/T 7994 provisions of this part of the test method requires a joint glass-lined pressure tightness test equipment, methods and water/gas. This section applies to glass-lined pressure leak test equipment.

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 7991.6 enamel coating Test methods - Part 6. High voltage test

3 test requirements

3.1 air tightness test of time Tightness test should be carried out after the hydrostatic test qualified. 3.2 test pressure gauge 3.2.1 tightness test and apply the same two gauges within the validity period of the test qualified. Pressure gauge should be installed on top of glass-lined equipment The same position unit, the installation position to facilitate the testing personnel observed. 3.2.2 For the design pressure less than 1.6MPa glass-lined equipment, pressure gauge accuracy rating of not less than 2.5; the design pressure Than or equal to 1.6MPa glass-lined equipment, pressure gauge accuracy rating of not less than 1.6. 3.2.3 gauge scale limit at about twice the test pressure is appropriate, and should not be less than 1.5 times the test pressure of not more than 3 times. 3.3 tightness test medium The test gas should be dry and clean air, nitrogen or other inert gas, test gas shall not be less than 5 ℃. Test Method 4 4.1 air tightness test, should generally be safety accessories and mixers and other accessories fully assembled. Site assembly attached to safety before use for administration Stirrer and other parts and accessories, air tightness test report shall be glass-lined equipment indicated in the quality certificate. assembled on site safety accessories and stirred After the required accessories such as air tightness test again. 4.2 tightness test before the glass-lined equipment to deal with the quality of assembly, test preparation to conduct a comprehensive inspection. 4.3 Test pressure should rise slowly, after the test pressure reaches a predetermined dwell time enough for all welded joints and joints coated fertilizer Soapy water or other liquid leak leak check, visually observed for leaks. 4.4 during the tightness test can not be under pressure or external force is applied to the fastening bolt pressure components. Shall not be used to maintain continuous pressure test

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