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GB/T 34638-2017 English PDF

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US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 34638-2017: Non-destructive testing -- Test methods for ultrasonic leak detection
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34638-2017	199	Add to Cart	3 days	Non-destructive testing -- Test methods for ultrasonic leak detection	Valid

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Basic data

Standard ID: GB/T 34638-2017 (GB/T34638-2017)
Description (Translated English): Non-destructive testing -- Test methods for ultrasonic leak detection
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 19.100
Word Count Estimation: 10,199
Date of Issue: 2017-09-29
Date of Implementation: 2018-04-01
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 34638-2017: Non-destructive testing -- Test methods for ultrasonic leak detection

---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.
Non-destructive testing - Test methods for ultrasonic leak detection ICS 19.100 J04 National Standards of People's Republic of China Nondestructive testing ultrasonic leak detection method 2017-09-29 Posted 2018-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The release of this document Organizations should not assume responsibility for identifying these patents. This standard by the National Standardization Technical Committee nondestructive testing (SAC/TC56) and focal point. This standard drafting unit. China Special Equipment Inspection and Research Institute, the State Nuclear Power Station Service Technology Co., Ltd., Shanghai Thai Division Detection Technology Co., Ltd., Hebei Province, Boiler and Pressure Vessel Supervision and Inspection Institute. The main drafters of this standard. Zhang Jun Jiao, Shen Gongtian, Qin Xiangyong King for Section, Court, Lin, Qian Zhengyu, Zhang Jian, Zhang Yiming, Wu accounted for stability, Wang Weihua, Fu Jianping. Nondestructive testing ultrasonic leak detection method

1 Scope

This standard specifies the ultrasonic leak detection method and the results of evaluation. This standard applies to the working medium for the gas or liquid in the use of airtight equipment or components during the operation of the leak detection.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 9445 non-destructive testing personnel qualification and certification GB/T 12604.7 Non-destructive testing term leak detection GB/T 20737 non-destructive testing common terms and definitions

3 Terms and definitions

GB/T 12604.7 and GB/T 20737 defined terms and definitions apply to this document.

4 Method summary

Ultrasonic leak detection technology is the use of ultrasonic technology to detect leaks, with easy to operate, fast, environmentally friendly and low cost special point. For fluid-filled containment devices, when the internal pressure is greater than the external pressure, once a leak occurs, the fluid medium due to internal and external pressure The existence of the hole will be punched out. When the size of the leak hole is small, the flushing fluid forms a turbulent flow, and the turbulent flow will generate a certain frequency near the leak hole Sound waves and can spread in the air. The main frequency of acoustic vibration and leaky hole size, when the frequency of 20Hz ~ 20kHz, the human ear can hear To leak sound, when the frequency is greater than 20kHz, the ultrasonic signal. Ultrasound has good directivity, its intensity with the propagation distance Increase and rapidly decay, through the use of specialized instruments to detect the energy of these ultrasonic signals can determine the location of the leak and measure the leak small. Figure 1 shows the schematic diagram of ultrasonic leak detection. The ultrasonic signal generated by the leak can be received by the ultrasonic leak detector through the probe. versus Compared to most leak detection methods, the sensitivity of the ultrasonic leak detection method is low, and the pressure conditions of the device under test, the size of the leak hole, the leak Hole location and probe spacing and other factors, the maximum sensitivity of the existing equipment 1 × 10-3Pa · m3/s, does not apply to have a fatal or dangerous Acceptance testing of airtight equipment for hazardous substances. Ultrasonic leak detection principle shown in Figure 1. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 34638-2017_English be delivered?

Answer: Upon your order, we will start to translate GB/T 34638-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 34638-2017_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 34638-2017_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.