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GB/T 7784-2018 English PDF

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Q: Should I purchase the latest version GB/T 7784-2018?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7784-2018 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.

US$599.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 7784-2018: Test methods for power reciprocating pump
Status: Valid

GB/T 7784: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7784-2018	599	Add to Cart	5 days	Test methods for power reciprocating pump	Valid
GB/T 7784-2006	RFQ	ASK	6 days	Test methods for power reciprocating pumps	Obsolete
GB/T 7784-1987	RFQ	ASK	6 days	Method of testing power reciprocating pump	Obsolete

Similar standards

JB/T 6879 JB/T 13977 GB/T 7782 GB/T 7785

Basic data

Standard ID: GB/T 7784-2018 (GB/T7784-2018)
Description (Translated English): Test methods for power reciprocating pump
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J71
Classification of International Standard: 23.080
Word Count Estimation: 30,351
Date of Issue: 2018-12-28
Date of Implementation: 2019-07-01
Older Standard (superseded by this standard): GB/T 7784-2006
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 7784-2018: Test methods for power reciprocating pump

---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.
Test methods for power reciprocating pump ICS 23.080 J71 National Standards of People's Republic of China Replace GB/T 7784-2006 Motorized reciprocating pump test method Published on.2018-12-28 2019-07-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Implementation of the test 1 4.1 Test Type 1 4.2 Organization of the trial 2 4.3 Test device 3 4.4 Test conditions 3 4.5 Measurement Uncertainty 4 4.6 Test item 6 5 parameter measurement 8 5.1 Traffic 8 5.2 Pressure and vacuum 8 5.3 Temperature 9 5.4 Pump speed 9 5.5 Power 9 6 Data Processing 10 6.1 Traffic 10 6.2 Pressure and vacuum 10 6.3 Pump speed 13 6.4 Power 13 6.5 Pump efficiency 14 6.6 Volume factor 14 6.7 Pump unit efficiency 14 6.8 Net positive suction head 14 7 Drawing of performance curves 15 8 Test report 15 Appendix A (informative appendix) Motorized reciprocating pump test record table 16 Appendix B (informative appendix) Figure 17 of the motorized reciprocating pump test device Appendix C (informative) Estimation and analysis of uncertainty 19 Appendix D (informative) Determination of noise 24

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 7784-2006 "Test Method for Motorized Reciprocating Pumps". Compared with GB/T 7784-2006 "Motor Reciprocating Pump Test Method", the main technical changes except the editorial modification are as follows. --- Increased test accuracy rating (see Chapter 1); --- Further clarified the "test type" and "test site", and added test elements such as "tester", "test outline" and "test equipment" (See 4.1, Chapter 4 of the.2006 edition); --- Added test device requirements (see 4.3); --- Expanded the scope of application of "test media" (see 4.4.3); --- Expanded the scope of application of the performance test speed (see 4.4.4); --- Revised the systematic error of volumetric and mass method flow measurement (see 5.1,.2006 version 6.1); --- Fixed the calculation formula for discharge pressure (see 6.2.1, 7.2.1 of.2006 edition); --- Corrected the calculation formula of suction pressure (see 6.2.2, 7.2.2 of.2006 edition); --- Fixed the calculation formula for net positive suction head (see 6.8, 7.8 of.2006 edition). This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Pump Standardization Technical Committee (SAC/TC211). This standard was drafted. Hefei General Machinery Research Institute, Ningbo Heli Machine Pump Co., Ltd., Qijiang County Xinhong High Pressure Reciprocating Pump Valve Factory, Hangzhou Dachao Petrochemical Equipment Co., Ltd., Ningbo Qianhu Petroleum Equipment Co., Ltd., Chongqing Pump Factory Co., Ltd., Weifang, Shandong Province Machinery Co., Ltd., Shanghai Fusite Fluid Machinery Co., Ltd., Zhejiang Dayong Industrial Co., Ltd., Hefei General Environmental Control Technology Technology limited liability company. The main drafters of this standard. Liu Guangbing, Jiang Qing, Liu Heping, Ren Qile, Zuo Shenghong, Yang Shudong, Chen Zhengwen, Zheng Shangjun, Guan Shuguang, Liu Shujian, Shou Manguang, Bao Xianqi. The previous versions of the standards replaced by this standard are. ---GB/T 7784-1981, GB/T 7784-1987, GB/T 7784-2006. Motorized reciprocating pump test method

1 Scope

This standard specifies the implementation of the test of the motorized reciprocating pump (hereinafter referred to as "pump"), parameter measurement, data processing, performance curve drawing, test Report. This standard includes two levels of measurement accuracy. Level 1 for higher accuracy tests, Level 2 for general accuracy tests, and two measurements. The accuracy level includes different tolerance coefficient values, allowable fluctuation values, and measurement error limits. This standard applies to both the pump itself without any piping accessories and to the pump assembly with piping accessories.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 1029 three-phase synchronous motor test method GB/T 1032 three-phase asynchronous motor test method GB/T 1311 DC motor test method GB/T 3102.7 Amount and unit of acoustics GB/T 3241 octave and fractional octave filter GB/T 3785.1 Electroacoustic sound level meters - Part 1. Specification GB/T 3785.2 Electroacoustic sound level meters - Part 2. Type evaluation test GB/T 3947 acoustic terminology GB/T 7785 reciprocating pump classification and terminology GB/T 9069 reciprocating pump noise sound power level measurement engineering method GB/T 9234 motorized reciprocating pump GB/T 13364 reciprocating pump mechanical vibration test method JJG176 Acoustic Calibrator JJG188 sound level meter

3 Terms and definitions

The following terms and definitions as defined in GB/T 7785 apply to this document. 3.1 Rated differential pressure rateddifferentialpressure The difference between the rated discharge pressure of the pump and the rated suction pressure of the pump.

4 Implementation of the test

4.1 Type of test 4.1.1 The identification of the first pump and the sampling and approval of the mass production pump shall be type tested. The type test items shall be carried out according to Table 1. The test accuracy ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 7784-2018_English be delivered?

Answer: Upon your order, we will start to translate GB/T 7784-2018_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 GB/T 7784-2018_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 7784-2018_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 GB/T 7784-2018?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7784-2018 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.