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JJG 642-2007 English PDF

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Q: Should I purchase the latest version JJG 642-2007?

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US$709.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 642-2007: Verification Regulation of Spherical Metal Tank Capacity
Status: Valid

JJG 642: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 642-2007	709	Add to Cart	5 days	Verification Regulation of Spherical Metal Tank Capacity	Valid
JJG 642-1990	639	Add to Cart	5 days	Verification Regulation of Spherical Metal Tank Capacity	Obsolete

Similar standards

GB/T 36126 JJG 646 GB/T 1885 JJG 648 JJG 649 JJG 640

Basic data

Standard ID: JJG 642-2007 (JJG642-2007)
Description (Translated English): Verification Regulation of Spherical Metal Tank Capacity
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Classification of International Standard: 17.060
Word Count Estimation: 27,248
Date of Issue: 2007-08-21
Date of Implementation: 2008-02-21
Older Standard (superseded by this standard): JJG 642-1990
Quoted Standard: AQSIQ Announcement No. 142 of 2007
Regulation (derived from): AQSIQ Announcement No. 142 of 2007
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to new manufacture, use and alterations, the nominal capacity of not less than 50m3 capacity spherical metal cans initial verification, testing and use of follow-up inspection.

JJG 642-2007: Verification Regulation of Spherical Metal Tank Capacity

---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 Spherical Metal Tank Capacity National Metrology Verification Regulations of the People's Republic Spherical metal tank capacity Released on.2007-08-21 2008-02-21 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Spherical metal tank capacity Verification procedure Verification Regulationof Spherical MetalTankCapacit Replace JJG 642-1990 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on August 21,.2007, and Implemented on February 21,.2008. Focal Point. National Traffic Capacity Measurement Technical Committee Main drafting unit. China Institute of Metrology National Large Capacity Second Metering Station Jiangsu Institute of Metrology Qingdao Metrology and Testing Institute Participated in the drafting unit. Leica Beijing Representative Office This regulation entrusts the National Traffic Capacity Measurement Technical Committee to explain The main drafters of this procedure. Liu Ziyong (China Institute of Metrology) Shen Jianguo (National Large Capacity Second Metering Station) Huang Zhaohui (Jiangsu Institute of Metrology) Qiu Jianghai (Qingdao Metrology and Testing Institute) Participate in the drafters. Song Shugu (Qingdao Metrology and Testing Institute) Xu Zhongyang (Leica Beijing Representative Office) Guo Ligong (China Institute of Metrology) Yu Lin (China Institute of Metrology) Blizzard (China Institute of Metrology)

1 Scope (1) 2 Citations (1) 3 terms (1) 4 Overview (1) 5 Metrological performance requirements (1) 6 General technical requirements (1) 6.1 Construction requirements (1) 6.2 Appearance requirements (2) 6.3 Nameplate requirements (2) 7 measuring instrument control (2) 7.1 Verification conditions (2) 7.2 Verification project (3) 7.3 Verification method (4) 7.4 Processing of verification results (11) 7.5 Verification cycle (11) Appendix A Test and Correction of the Theodolite (12) Appendix B Correction of Center Distance (13) Appendix C Measurement method when the cutting point cannot be aimed at (14) Appendix D Total Station Measurement (15) Appendix E Weighing Measurement (17) Appendix F Theodolite Measurement Spherical Tank Radius Record (Reference Format) (18) Appendix G Spherical Tank Radius Calculation Table (Reference Format) (19) Appendix H Spherical Tank Internal Diameter Measurement Record (Reference Format) (20) Appendix I Certification Certificate (inside page) format (21) Appendix J Spherical Metal Tank Capacity Table (Reference Format) (22) Spherical metal tank capacity verification procedures

1 Scope

This procedure is applicable to spherical metal cans with a nominal capacity of not less than 50 m3 after new manufacturing, use and alteration. The first verification, subsequent verification and in-use inspection of the capacity of the spherical tank.

2 Citations

This procedure refers to the following documents. GB 12337-1998 Steel spherical storage tank GB/T 17261-1998 Steel spherical tank type and basic parameters GB/T 19780-2005 Volumetric calibration of spherical metal cans GB/T 15181-1994 Spherical metal tank volume calibration method (square method) When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 terms

3.1 spherical metal tank (sphericalmetalictank) A closed pressure vessel welded into a spherical shape is welded with a steel plate. 3.2 spherical tank equatorial diameter (leveldiameterofsphericaltank) The diameter of the spherical tank in the horizontal direction. 3.3 Vertical diameter of spherical tank (verticaldiameterofsphericaltank) The diameter of the spherical tank in the vertical direction. 3.4 center distance (centerdistance) The horizontal distance between the theodolite or the total station center to the center of the tank.

4 Overview

The spherical tank is a closed pressure vessel for storing and measuring liquefied petroleum gas and light liquefied chemical products. it The structure is generally made in the shape of a true sphere. Since the diameter of each direction is slightly different after the actual construction, it is necessary to measure the spherical tank. The equatorial diameter and vertical diameter are calculated to obtain their exact capacity.

5 Metrological performance requirements

The expanded uncertainty of the spherical tank total capacity verification result is 0.3% (k=2).

6 General technical requirements

6.1 Construction requirements Spherical tanks shall be in accordance with GB 12337-1998 "Steel spherical storage tanks", GB/T 17261-1998 "Steel ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 642-2007_English be delivered?

Answer: Upon your order, we will start to translate JJG 642-2007_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 642-2007_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 642-2007_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJG 642-2007?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 642-2007 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.