GB/T 26834-2011 English PDF

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GB/T 26834-2011: Non-destructive testing instruments -- Measurement of effective focal spot size of mini and micro focus X-ray tubes
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 26834-2011	169	Add to Cart	3 days	Non-destructive testing instruments -- Measurement of effective focal spot size of mini and micro focus X-ray tubes	Valid

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Basic data

Standard ID: GB/T 26834-2011 (GB/T26834-2011)
Description (Translated English): Non-destructive testing instruments -- Measurement of effective focal spot size of mini and micro focus X-ray tubes
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N78
Classification of International Standard: 19.100
Word Count Estimation: 7,766
Date of Issue: 2011-07-29
Date of Implementation: 2011-12-01
Quoted Standard: GB/T 12604.2-2005; GB/T 19348.1-2003
Regulation (derived from): Announcement of Newly Approved National Standards No. 12 of 2011
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
Summary: This standard specifies the tube voltage is not greater than 225kV X-ray tube for the effective focal spot size 5��m-300��m clear edge X-ray radiographic measurement method. Image quality and resolution X-ray image characteristics depends focus, the focus image quality rely on two-dimensional density distribution of the object. For specific purposes using X-ray radiography.

GB/T 26834-2011: Non-destructive testing instruments -- Measurement of effective focal spot size of mini and micro focus X-ray tubes

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Non-destructive testing instruments. Measurement of effective focal spot size of mini and micro focus X-ray tubes ICS 19.100 N78 National Standards of People's Republic of China Nondestructive testing equipment Small focus and micro focus X-ray tube The effective focal spot size measurement method Issued on. 2011-07-29 2011-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 Test Method 1 4.1 Principle and equipment 1 4.2 Distance and exposure time selection 2 Determination of measurement and focus size 5 2 5.1 Measurement 2 5.2 Determination of 3

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard corresponds to British Standard BSEN12543-5.1999 "focus behavior of industrial X-ray apparatus for non-destructive testing of the first Part 5. Small focus and micro focus X-ray tube effective focal spot size measurement method ", with its main technical differences are as follows. --- Increased Chapter 3 Terms and definitions; --- Increased in Chapter 2, normative references; direct reference to the latest version of the European standard corresponding to our standards. For ease of use, this standard made the following editorial changes. --- Use the "standard" instead of the "European standard"; --- Remove European standard BSEN12543-5.1999 Foreword; --- Remove European standard BSEN12543-5.1999 Introduction; --- With Chinese decimal comma instead of the original English. The standard proposed by China Machinery Industry Federation. This standard by the National Standardization Technical Committee tester (SAC/TC122) centralized. This standard is drafted by. Liaoning Instrument Research Institute, Dandong NDT Equipment Co., Ltd. Participated in the drafting of this standard. Shanghai superior NDT Instrument Co., Ltd., Dandong City Wanquan NDT Instrument Factory Dandong City Testing Instrument. The main drafters of this standard. Yang Chunyan, Dong Diangang, Wu Yifang, Zhang Hong, Lin Baohua. Nondestructive testing equipment Small focus and micro focus X-ray tube The effective focal spot size measurement method

1 Scope

The standard provides a clear edge X-ray tube voltage 225kV X-ray is not greater than the effective focal spot size of 5μm ~ 300μm Radiographic measurements. X-ray image quality and resolution of the image depends on the characteristics of focus, focus, image quality relies on two-dimensional plane of the object density distributed. X-ray radiographic techniques used for specific purposes. Note. By using the same method can be negotiated to a higher voltage kV X-ray tube, but measurement accuracy is poor.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 12604.2-2005 Terminology for nondestructive testing radiographic testing (ISO 5576.1997, IDT) GB/T 19348.1-2003 destructive testing - Industrial radiographic film - Part 1. Classification of film systems for industrial radiography (ISO 11699-1.1998, IDT)

3 Terms and Definitions

Terms and definitions GB/T 12604.2 established in this document apply. Test Method 4 4.1 Principle and equipment This method is an indirect measure of geometric clarity by measuring the focal spot size. For this reason a clear edge imaging either in film or ray The image forming apparatus have adopted a high geometric magnification. If using film measurement requires the following equipment. --- Test substance; --- Film, the minimum 10cm × 10cm, without sensitization; --- Low absorbent material film cartridge (example. polyethylene); --- Film clip; --- Film processing unit; --- Can be read density greater than 3.0 micrometer densitometer, and there d1≤10μm input diaphragm. If ray imaging device measurements require the following equipment. --- Test substance; ......

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