GB/T 36017-2018 English PDF (GBT36017-2018)

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GB/T 36017-2018: Non-destructive testing instruments -- X-ray fluorescence analytic tube
GB/T 36017-2018
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.100
N 78
Non-destructive Testing Instruments -
X-ray Fluorescence Analysis Tube
ISSUED ON: MARCH 15, 2018
IMPLEMENTED ON: OCTOBER 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Product categories ... 4 
4 Technical requirements ... 5 
5 Test method ... 8 
6 Test rules ... 15 
7 Signs, packaging, transportation and storage ... 16 
Non-destructive Testing Instruments -
X-ray Fluorescence Analysis Tube
1 Scope
This Standard specifies the product categories, technical requirements, test
methods, test rules, signs, packaging, transportation and storage of X-ray
fluorescence analysis tube.
This Standard applies to side-window X-ray fluorescence analysis tube and
end-window X-ray fluorescence analysis tube.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 191, Packaging. Pictorial marking for handling of goods
GB/T 13384, General specifications for packing of mechanical and electrical
product
GB 22448-2008, Protection rules for industrial X-ray radiographic equipment
up to 500kV
GB/T 25480, Basic environmental conditions and testing methods for
transportation and storage of instruments
3 Product categories
3.1 Models and specifications
See Table 1 for models and specifications of X-ray fluorescent tube.
Table 1 -- Models and specifications of X-ray fluorescent tube
Models Specifications
XY (C or D) 1-1/50 1 kW series
XY (C or D) 2-2/60 2 kW series
XY (C or D) 3-3/60 3 kW series
Table 5 -- Beryllium window thickness
Target Beryllium window thickness / mm
W, Mo, Rh, Pt Less than or equal to 0.75
Cr Less than or equal to 0.5
4.3.6 The target angle of the X-ray fluorescent tube is 26°; the radiation cone
angle of the X-ray is not less than 50°; the X-ray radiation intensity within the
range shall be uniform; the relative density difference is not larger than 0.3.
4.3.7 The X-ray fluorescent tube shall work continuously for 30 minutes under
rated load without abnormal phenomena such as discharge.
4.4 Reliability requirements
4.4.1 The X-ray air kerma rate shall meet the requirements of Chapter 3 of GB
22448-2008.
4.4.2 The X-ray fluorescent tube’s life, namely its cumulative working time limit,
shall not be less than 500 h. The intensity of the impurity line within the working
time limit shall not exceed 100% of the value that is specified in Table 4.
4.4.3 The X-ray fluorescent tube oil seal shall be good and without evidence of
oil leakage; the oil pressurization shall be greater than 45kV/2.5mm.
4.4.4 The X-ray fluorescent tube is anode-grounded water cooling; the water
seal is good and without leakage or water seepage; the water flow must be
smooth; the water flow shall meet the requirements of Table 6 and be able to
work normally.
Table 6 -- Water flow
Models Water flow / (L/min) Water quality requirements
XY (C or D) 1-1/50
XY (C or D) 2-2/60 Larger than or equal to 3 Pure water or distilled water XY (C or D) 3-3/60 Larger than or equal to 4
4.4.5 The X-ray fluorescent tube shall have sufficient mechanical strength. After
the test, of which, the acceleration is 39.2 m/s2, the frequency is 40 times/min,
and the continuous shock is 500 times, the external structure and electrical
parameters of the fluorescent tube shall meet the requirements of this Standard.
4.5 Appearance quality requirements
4.5.1 The roughness of the installation sealing surface of X-ray fluorescent tube
and fluorescence spectrometer shall not be lower than Ra = 1.6.
4.5.2 The anode cooling device of the X-ray fluorescent tube shall be made of
corrosion-resistant materials; the outer parts of the tube shall have anti-
5.4 The rated power, maximum tube voltage and maximum tube current of
the X-ray fluorescent tube
5.4.1 Test of the rated power of the X-ray fluorescent tube
Apply the filament current (voltage) which is specified in the product
documentation; preheat according to the specified preheating time; apply half
the tube voltage which is specified in the product document; then adjust the
filament current (voltage), so that the anode current reaches the current value
that is confirmed by the rated power of the fluorescent tube under the specified
tube voltage; then raise to the specified value at a speed of not more than 10
kV/min, and, at the same time, adjust the filament current (voltage) to keep a
constant anode current.
5.4.2 Test of the maximum tube power of the X-ray fluorescent tube
Install the fluorescent tube on the test bench; according to the specified working
procedure, adjust the tube current and the tube voltage to the maximum values;
read the tube voltage value by the indication number of the voltmeter needle.
5.4.3 Test of the maximum tube current of the X-ray fluorescent tube
Install the fluorescent tube on the test bench; according to the specified working
procedure, adjust the tube current and the tube voltage to the maximum values;
read the maximum tube current value by the indication number of the
milliampere hand.
5.5 Emission characteristics of the X-ray fluorescent tube
Adjust the high-voltage time controller to the permissible conditions; adjust the
filament current (voltage) to a certain value; then apply a given tube voltage
until the tube voltage, when loading, still meets the given value. Read the
corresponding anode current value. The same method can be used to measure
the anode current Ia = f (If) (filament current) curve under (a set of) given tube
voltages.
Since the filament circuit is in the high-voltage circuit; therefore, the filament
current If cannot be directly measured in the high-voltage circuit; however, the
relationship between the primary and secondary turns ratio can be used to
indirectly and roughly measure the filament current; also, the filament current
value of each coordinate point, under the circumstance when the high voltage
is turned off, can be used to directly measure the exact filament current value.
5.6 X-ray fluorescent tube impurity line
5.6.1 Test of X-ray fluorescent tube spectral purity
The spectral purity test shall be carried out on an X-ray diffractometer whose
impurity line according to Formula (1). It is also available to firstly calculate
the integrated intensity of Kβ1, then calculate the intensity of Kα1 according
to the ratio of Table 7. If Kα1 and Kα2 can be separated in their higher-order
wave (take n=2 or more in nλ=2dsinθ), the high-order line graph can be
scanned at a large angle (θ), and the same peak envelope integral can be
utilized to calculate the relative intensity H of the impurity line intensity.
b) If, in the obtained line graph, the impurity spectrum is so small that the
integrated intensity is hard to calculate, reduce the attenuation rate and
re-scan the small range near the angle of the impurity spectrum; use the
larger peak envelope to calculate the integral intensity; then reduce the
corresponding multiple.
c) This method is also applicable to point-focus X-ray ...