GB/T 28782.2-2023 English PDFUS$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 28782.2-2023: Hydraulic fluid power - Measurement techniques - Part 2: Measurement of average steady-state pressure in a closed conduit Status: Valid GB/T 28782.2: Historical versions
Basic dataStandard ID: GB/T 28782.2-2023 (GB/T28782.2-2023)Description (Translated English): Hydraulic fluid power - Measurement techniques - Part 2: Measurement of average steady-state pressure in a closed conduit Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J20 Classification of International Standard: 23.100.01 Word Count Estimation: 10,171 Date of Issue: 2023-08-06 Date of Implementation: 2023-08-06 Older Standard (superseded by this standard): GB/T 28782.2-2012 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 28782.2-2023: Hydraulic fluid power - Measurement techniques - Part 2: Measurement of average steady-state pressure in a closed conduit---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. ICS 23.100.01 CCSJ20 National Standards of People's Republic of China Replace GB/T 28782.2-2012 Hydraulic transmission measurement technology part 2.containment Measurement of the average steady-state pressure in the circuit (ISO 9110-2.2020,MOD) Published on 2023-08-06 2023-08-06 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPrefaceⅠ Introduction III 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Measuring instrument selection 1 5 Pressure measuring point 2 6 General Procedure 4 7 Combined standard uncertainty5ForewordThis document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is Part 2 of GB/T 28782 "Hydraulic Transmission Measurement Technology". GB/T 28782 has released the following parts. ---Part 1.General principles; ---Part 2.Measurement of average steady-state pressure in closed circuits. This document replaces GB/T 28782.2-2012 "Hydraulic transmission measurement technology Part 2.Measurement of average steady-state pressure in closed circuits" "Quantity", compared with GB/T 28782.2-2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Changed “Terms and Definitions” (see Chapter 3, Chapter 3 of the.2012 edition); b) Delete "Evaluation of the uncertainty of readings of measuring instruments" (see Chapter 4 of the.2012 edition); c) Added "Measuring Instrument Selection" (see Chapter 4); d) The calibration of working instruments has been deleted (see Chapter 5 of the.2012 edition); e) Changed the requirements for “pressure measuring points” (see Chapter 5, 7.2 of the.2012 edition); f) Added “general procedures” (see Chapter 6); g) “Determination of calibration uncertainty” is deleted (see Chapter 6 of the.2012 edition); h) Added “synthetic standard uncertainty” (see Chapter 7); i) "Equipment selection, test equipment and pulse dampers" are deleted (see 7.1, 7.3 and 7.4 of the.2012 version); j) Delete "Acquisition of test data and calculation of the influence of uncertainty of pressure measurement points" (see Chapter 8 of the.2012 edition); k) “Total measurement uncertainty” has been deleted (see Chapter 9 of the.2012 edition). This document is modified to adopt ISO 9110-2.2020 "Hydraulic transmission measurement technology Part 2.Determination of average steady-state pressure in closed circuits" Measurement". The technical differences between this document and ISO 9110-2.2020 and their reasons are as follows. ---Replaced ISO 5598 (see Chapter 3) with normatively cited GB/T 17446 to adapt to my country's technical conditions and improve reliability operability; ---Replaced ISO 9110-1 (see Chapter 4 and Chapter 7) with the normatively quoted GB/T 28782.1 to adapt to my country's technology conditions to improve operability. The following editorial changes have been made to this document. ---Integrate formula (2) ~ formula (4) into one formula, and the subsequent formula numbers will be postponed; ---Changed the symbols of fluid speed and fluid density; ---Reference removed. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Hydraulic and Pneumatic Standardization Technical Committee (SAC/TC3). This document was drafted by. Shaoguan Quality Supervision and Inspection Institute of Guangdong Province, Zhejiang University, Chuzhou Jingmei Home Appliances Equipment Co., Ltd. Company, Youweili Hydraulic Technology Co., Ltd., Xiamen Fengliyang Technology Co., Ltd., Zhejiang Haihong Hydraulic Technology Co., Ltd., Ningbo Product and Food Quality Inspection Institute (Ningbo Fiber Inspection Institute), Xiamen University, Hubei Weinengda Transmission Co., Ltd., Jinhua Guanrizhi Energy Technology Co., Ltd., Henan Aerospace Hydraulic and Pneumatic Technology Co., Ltd., Ningbo Hengtong Nuoda Hydraulic Co., Ltd., Xi'an Libeian Intelligent Technology Co., Ltd., Beijing Machinery Industry Automation Research Institute Co., Ltd. The main drafters of this document. Zhao Shangyu, Xu Bing, Zhang Lin, Lin Guang, He Xianjian, Zheng Zhijian, Ye Shaoqian, Li Zhenyi, Zeng Guo, Lin Pengxiang, Liu Baolin, Wang Dongsheng, Liu Songlin, Cao Qiaohui. This document was first published in.2012 and this is the first revision.IntroductionAs a key technology in the development and production of hydraulic components and hydraulic systems, hydraulic transmission measurement technology is an important tool for verifying product performance indicators and reliability. important means of sex, lifespan, etc. The performance characteristics of hydraulic components and hydraulic systems can be quantified to provide a basis for action or decision-making. GB/T 28782 "Hydraulic Transmission Measurement Technology" aims to unify the measurement technology in hydraulic transmission. It is planned to be developed by two departments. Composition. ---Part 1.General principles. The purpose is to identify general guidelines for measuring hydraulic component performance parameters under static or steady-state operating conditions. ---Part 2.Measurement of average steady-state pressure in closed circuits. The purpose is to determine the average steady-state pressure in the hydraulic transmission circuit program of. Hydraulic transmission measurement technology part 2.containment Measurement of the average steady-state pressure in the circuit1 ScopeThis document establishes procedures for measuring average steady-state pressure in hydraulic transmission circuits. This document is suitable for measuring seals with an inner diameter greater than 3mm, an average flow velocity less than 25m/s, and an average steady-state static pressure less than 70MPa. The average steady-state pressure in the circuit. This document does not apply to pressure sensors that are built-in or integrated into the wall of a closed fluid pipe. This document gives an estimation formula for the combined standard uncertainty of pressure measurements.2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 17446 Fluid transmission system and component vocabulary (GB/T 17446-2012, ISO 5598.2008, IDT) GB/T 28782.1 Hydraulic transmission measurement technology Part 1.General principles (GB/T 28782.1-2023, ISO 9110-1. 2020,MOD)3 Terms and definitionsThe terms and definitions defined in GB/T 17446 and the following apply to this document. 3.1 The pressure loss between two pressure measuring points caused only by the test pipeline (excluding the component under test). 4.Measuring instrument selection 4.1 4.2~4.6 should be evaluated according to GB/T 28782.1. 4.2 Uncalibrated measuring instruments should be fully calibrated using traceable reference standards. and record information about reference standards. According to regulations Calibrate gauge or absolute pressure instruments using established procedures. Calibrate the differential pressure instrument at the line pressure relevant to its application by pressurizing both ports of the instrument simultaneously. To measure bidirectional pressure, use the instrument Both the positive and negative measuring quadrants of the instrument should be calibrated. If the above calibration method is not feasible or the pipeline pressure endured by the differential pressure instrument changes during measurement, calculate the composite standard in Chapter 7. When determining the accurate uncertainty, the maximum measurement error caused by the pipeline pressure effect should be regarded as the standard uncertainty component. Conduct periodic inspections of instruments according to corresponding accuracy level requirements. 4.3 Evaluate the measurement uncertainty introduced by the reading capability of the reading device connected to or equipped with the measuring instrument. 4.4 Evaluate the measurement uncertainty components introduced by calibration. Each measuring instrument should establish an uncertainty model derived from the calibration results. 4.5 Each measuring instrument should have a calibration record or calibration database and be attached with a calibration label, see GB/T 28782.1. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 28782.2-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 28782.2-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 28782.2-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 28782.2-2023 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. |
