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JJG 621: Historical versions
| Std ID | Version | USD | Buy | Deliver [PDF] in | Title (Description) |
| JJG 621-2012 | English | 399 |
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|
3 days [Need to translate]
|
Verification Regulation of Hydraulic Jacks
|
| JJG 621-2005 | English | 519 |
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|
4 days [Need to translate]
|
Hydraulic jacks VRof
|
| JJG 621-1996 | English | 279 |
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|
3 days [Need to translate]
|
Verification Regulation of Hydraulic Tension Sake
|
| JJG 621-1989 | English | RFQ |
ASK
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3 days [Need to translate]
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(Chinese Industry Standard)
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Basic data
| Standard ID | JJG 621-2012 (JJG621-2012) |
| Description (Translated English) | Verification Regulation of Hydraulic Jacks |
| Sector / Industry | Metrology & Measurement Industry Standard |
| Classification of Chinese Standard | A53 |
| Classification of International Standard | 17.120 |
| Word Count Estimation | 17,124 |
| Older Standard (superseded by this standard) | JJG 621-2005 |
| Quoted Standard | JJG 49-1999; JJF 1001; JG/T 321-2011; JB 2104-1991 |
| Regulation (derived from) | AQSIQ Announcement No. 132 of 2012 |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine |
| Summary | This standard applies to hydraulic jack having indication function (hereinafter referred to as jack) of the initial verification, testing and use of follow-up checks. |
JJG 621-2012: Verification Regulation of Hydraulic Jacks
---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.
Verification Regulation of Hydraulic Jacks
State verification procedures People's Republic of China
Hydraulic jacks
HydraulicJacks
Issued on. 2012-09-03
2013-03-03 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Hydraulic jacks test procedures
ofHy
draulicJacks
Replacing JJG 621-2005
Focal point. the National Technical Committee on Metering hardness force value
Main drafting unit. Shenzhen Academy of Metrology and Quality Inspection
Guangdong Provincial Institute of Metrology
Fujian Institute of Metrology
Hubei Provincial Institute of Measurement and Testing
Participated in the drafting. Shaoxing City of Kent Machinery Electronics Co., Ltd.
Jilin Institute of Metrology
Shanghai Urban Planning and Design Institute
This procedure hardness values measured force commissioned by the National Technical Committee is responsible for interpretation
The main drafters of this procedure.
Huangshi Yuan (Shenzhen Academy of Metrology and Quality Inspection)
Peng Danyang (Guangdong Institute of Metrology)
Yao Jinhui (Fujian Institute of Metrology)
Hu Xiang (Hubei Institute of Measurement and Testing)
Drafters participate.
Lee root (Shaoxing City of Kent Machinery Electronics Co., Ltd.)
Qu Zhuo (Jilin Institute of Metrology)
Chen Jianxiang (Shanghai Urban Planning and Design Institute)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2. References (1)
3 Terms (1)
3.1 Load Efficiency (1)
3.2 internal leakage (1)
3.3 Calibration Equation (1)
4 Overview (1)
5 metering performance requirements (1)
6 General Requirements (2)
6.1 Appearance and accessories (2)
6.2 Indicator jack (2)
6.3 Operating adaptation (2)
7 control of measuring instruments (2)
7.1 verification Conditions (2)
7.2 test items and test methods (3)
8 test results processing and verification cycle (6)
Appendix A test certificate page format (7)
Appendix B test results of notice-page format (9)
Appendix C test record format (11)
Introduction
JJF1002 "national verification procedures write rules", JJF1001 "common measurement terms and definitions of" common structure
To support a revision of the regulations on the basis of the system specifications.
JJG 621 "hydraulic jack" is JG/T 321-2011 "prestressed by hydraulic jacks", JB2104-
1991 "hydraulic jack" as the basis for revising JJG 621-2005 version. And JJG 621-2005 phase
Ratio, in addition to editorial changes outside the main technical changes are as follows.
--- Canceled a procedure crawling requirements;
--- Cancel the original statutes to start oil pressure requirements;
--- Canceled a trip to the requirements of the statutes;
--- Refine the measurement of performance indicators show a different jack shown values (see 5.1);
--- Increased verification of measuring instruments specific requirements (see 7.1.2);
--- Refine the test conditions (see 7.1).
JJG 621-2005 of previously issued as follows.
--- JJG 621-1996 "hydraulic tensioning machine."
Hydraulic jacks test procedures
1 Scope
The order applies to have the indication of hydraulic jacks (hereinafter referred to as jack) initial verification, follow-up inspection
And given the use of checks.
2. References
JJG 49-1999 Bourdon Tube Precise pressure gauge and vacuum gauge
JJF1001 common measurement terms and definitions
JG/T 321-2011 prestressed by hydraulic jacks
JB2104-1991 hydraulic jack
For dated references, only the dated edition applies to this procedure; undated reference documents
Member, the latest edition (including any amendments) applies to this procedure.
3 Terms
3.1 load efficiency loadefficiency
Jack output power than with the theoretical value of the force.
3.2 Leak internalleak
Jack while maintaining the pressure, due to poor internal seal leakage phenomenon.
3.3 calibration equation calibrationequation
In order to be able to jack anyone, continuous use within the range of values, established in accordance with a limited number of extremely heavy set of data
Top pressure value and the standard represents the relationship between the applied force value.
Note. usually once or twice a curve.
4 Overview
Mainly by jack jack body, pumps, oil, and indicators, and its working principle is to pump oil through
Road to the jack body oil, body exerting a force on the jack body force, indicated by analog or digital indicator
Directly or indirectly, indicating the value of the applied force. Hydraulic jack is mainly used for pile force value engineering and structural engineering applied
And control.
5 metering performance requirements
5.1 Indicator display force value, jack accuracy level and technical indicators in Table 1.
...
