HOME   Cart(1)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189759 (19 Oct 2025)

JJG 241-2022 English PDF

US$419.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 241-2022: Precision Liquid Manometers of Cistern and U-tube
Status: Valid

JJG 241: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 241-2022English419 Add to Cart 4 days [Need to translate] Precision Liquid Manometers of Cistern and U-tube Valid JJG 241-2022
JJG 241-2002English559 Add to Cart 3 days [Need to translate] Verification Regulation of Precision Liquid Manometer for Cistern and U-tube Obsolete JJG 241-2002
JJG 241-1981English719 Add to Cart 5 days [Need to translate] Verification Regulation of Liquid Manometer (Grade II, III) Obsolete JJG 241-1981

Standard similar to JJG 241-2022

JJG 134   JJG 404   JJG 249   

Basic data

Standard ID JJG 241-2022 (JJG241-2022)
Description (Translated English) Precision Liquid Manometers of Cistern and U-tube
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 19,162
Date of Issue 2022-09-26
Date of Implementation 2023-03-26
Issuing agency(ies) State Administration for Market Regulation

JJG 241-2022: Precision Liquid Manometers of Cistern and U-tube

---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.
Precision Liquid Manometers of Cistern and U-tube National Metrology Verification Regulations of the People's Republic of China Precision cup and U-shaped liquid pressure gauges Released on 2022-09-26 2023-03-26 Implementation Released by the State Administration for Market Regulation Precision cup and U-shaped liquids Pressure Gauge Verification Regulations Replace JJG 241-2002 Responsible unit. National Pressure Measurement Technical Committee Main drafting unit. Tianjin Academy of Metrology Supervision and Testing Science Henan Institute of Metrology Participating in the drafting unit. Shanxi Institute of Metrology Central Tianyi Co., Ltd. This regulation entrusts the National Pressure Measurement Technical Committee to be responsible for interpretation The main drafters of this regulation. Guo Zhiming Tianjin Institute of Metrology Supervision and Testing Science Du Yinfei Tianjin Institute of Metrology Supervision and Testing Science Sun Xiaoquan Henan Institute of Metrology Participating drafters. Cui Yaoyao Tianjin Institute of Metrology Supervision and Testing Science Wang Yanzhao Henan Institute of Metrology Zhang Jinliang Shanxi Institute of Metrology Chen Weikun Central Tianyi Co., Ltd.

Table of contents

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and units of measurement(1) 3.1 Terminology(1) 3.2 Units of measurement(1) 4 Overview(1) 5 Metrological performance requirements (2) 5.1 Accuracy class, minimum division value and measuring range(2) 5.2 Indication error(3) 5.3 Zero error(3) 6 General technical requirements (3) 6.1 Appearance requirements (3) 6.2 Sealing (3) 6.3 Compressive strength(3) 7 Measuring Instrument Control(4) 7.1 Test conditions (4) 7.2 Verification items (4) 7.3 Verification method (5) 7.4 Processing of verification results (7) 7.5 Verification period(7) Appendix A Verification Record Format of Precision Cup and U-shaped Liquid Manometers (8) Appendix B Format of Inner Pages of Calibration Certificates for Precision Cup and U-shaped Liquid Pressure Gauge (9) Appendix C Format of the inner page of the notification of the verification result of precision cup and U-shaped liquid pressure gauges (10) Appendix D Gravitational Acceleration Numerical Table of Some Cities in China (11) Appendix E Air Density, Atmospheric Pressure and Ambient Temperature Conversion Factor Table (12) Appendix F Table of Density Values of Pure Water at Standard Atmospheric Pressure (13)

Introduction

JJF1002 "Rules for Writing National Metrology Verification Regulations", JJF1001 "General Metrology Terms and Definitions", JJF1008 "Terms and Definitions of Pressure Measurement" and JJF1059.1 "Evaluation and Expression of Measurement Uncertainty" The basic series of norms that constitute the revision of this regulation. This regulation is a revision of JJG 241-2002 "Precision Cup and U-shaped Liquid Pressure Gauge". and Compared with JJG 241-2002, except for text editorial revisions, the main technical requirements changes are as follows. --- Increased the description of related terms; ---The measuring range has been properly adjusted; --- Increased the description of relevant appearance requirements; --- The absolute value of the maximum allowable error of the standard is the absolute value of the maximum allowable error of the 0.2 and 0.4 tested pressure gauges Value ratio changed from 1/3 to 1/4. The previous releases of this regulation are as follows. ---JJG 241-2002; ---JJG 241-1981. Verification rules for precision cup and U-shaped liquid pressure gauges

1 Scope

This regulation is applicable to the first verification, Subsequent verification and in-use inspection.

2 References

This procedure references the following documents. JJG 1008-2008 Pressure measurement terms and definitions JB/T 6803.2 Liquid pressure gauge precision cup U-shaped pressure gauge For dated references, only the dated version applies to this regulation; for undated references, Its latest version (including all amendments) applies to this regulation.

3 Terminology and units of measurement

3.1 Terminology 3.1.1 liquid manometer liquidmanometer A pressure gauge made by using the principle that the pressure generated by the self-weight of the liquid is balanced with the measured pressure. [Source. JJF1008-2008, definition 3.1] 3.1.2 U-shaped liquid manometer U-tubeliquidmanometer The display tube is a U-shaped structure, which is a liquid pressure gauge for measuring pressure. [Source. JJF1008-2008, Definition 3.2] 3.1.3 Single-tube [cup-shaped] liquid manometer one-tubeliquidmanometer The display tube on one side of the U-shaped tube is made into a cup-shaped container, and the inner diameter of the single tube and the cup-shaped container is kept in a certain ratio. Liquid pressure gauge. [Source. JJF1008-2008, Definition 3.3] 3.2 Units of measurement The legal measurement unit used by the pressure gauge is Pa (Pascal), or its decimal multiple unit. kPa, etc.

4 Overview

Due to the flowable and incompressible characteristics of liquid under normal pressure, when the measured pressure acts on the precision cup and U-shaped When the liquid level at one end of the liquid pressure gauge (hereinafter referred to as the pressure gauge) is on the liquid level, the liquid will flow, causing the liquid at both ends of the connector to flow. The position of the face changes. When the pressure generated by the liquid injection height difference between the two liquid surfaces is equal to the measured pressure, the liquid stops flow to a state of equilibrium. The measured pressure can be calculated by formula (1). p=ρgh (1) In the formula. p --- measured pressure value, Pa;

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 241-2022_English be delivered?

Answer: Upon your order, we will start to translate JJG 241-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 241-2022_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 241-2022_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 [email protected]. 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 241-2022?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 241-2022 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.