The difference between ultrasonic flowmeter verification and calibration Most calibration laboratories carry out verification and calibration activities at the same time. The changes from verification to verification reflect the development history of China's measurement management system. The relationship between verification and calibration is positive for the development of calibration laboratories. significance.
Definition of Ultrasonic Flowmeter Verification: A procedure for ascertaining and confirming the compliance of a measuring instrument with statutory requirements, which includes inspection, marking and/or issuing a certificate of verification.
Definition of ultrasonic flowmeter calibration: Under the specified conditions, to determine the two indicated by the measuring instrument or measuring system, or the two represented by the measuring instrument or the reference material, and the corresponding value reproduced by the standard A set of operations between relationships.
(1) The main links between ultrasonic flowmeter verification and calibration are:
a. Verification and calibration are the evaluation types of measuring instrument characteristics, which are the two most important ways to ensure the correct value of the instrument.
b. Verification and calibration are activities that achieve unit unification and accurate and reliable values, that is, they all belong to the measurement category.
c. In most cases, the two are performed according to the same measurement procedure.
(2) The difference between ultrasonic flowmeter verification and calibration is mainly:
a. Legality Both mandatory and non-mandatory verifications are legal verifications and are law enforcement actions in the scope of legal measurement management. Executives should obtain the certification certificate issued by the relevant administrative department, and the implementation of national regulations. The calibration cannot fulfill the requirements. It is the voluntary behavior of the customer. The scope of service and service charges are determined by the type of agreement between the two parties.
b. The conformity test must be based on the verification procedure, the verification agency must make a conclusion on whether the instrument to be tested is qualified or not, and the validity period of the verification shall be stipulated according to the verification procedure. Calibration can be based on calibration specifications, calibration methods, or other technical documents agreed by both parties. It can be technical rules, specifications, or customer requirements. It can also be developed by the calibration organization. Calibration is mainly to determine the indication error. Calibration institutions generally do not need to make compliance. The statement is made by the user of the measuring instrument based on the calibration result and evaluated in the metering confirmation according to the specific application requirements.
c. Traceability From the way of ensuring accurate and consistent value, the verification is to transfer the value of the national measurement base (standard) from the top to the bottom to the measurement standard value of each level to the work measurement instrument, strictly enforce National verification system tables and verification procedures. Calibration is a bottom-up traceability of the magnitude to the national baseline. It can be leapfrogged, and the laboratory, trace time and method of providing traceability services can be selected as needed.
d. Carrying out the project verification consists of two parts: qualitative test and quantitative test. It is a comprehensive assessment of the measurement characteristics and technical requirements of the measuring instrument. Calibration generally involves only quantitative tests, only the indication error.
e. The results report is issued with a verification certificate or a non-conformity notice, and the calibration is usually issued to the calibration certificate.
-----Article source: Shanghai Senyi Intelligent Instrument Co., Ltd. Technology Department
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Chemical Composition (%)
Grade
C
Mn
P
S
Si
Cr
Mo
Ni
WP5 Class 1 & Class 3
≤0.15
0.3-0.6
≤0.04
≤0.03
≤0.5
4-6
0.44-0.65
WP9 Class 1 & Class 3
≤0.15
0.3-0.6
≤0.03
≤0.03
≤1
8-10
0.9-1.1
WP11 Class 1
0.05-0.15
0.3-0.6
≤0.03
≤0.03
0.5-1
1-5
0.44-0.65
WP11 Class 2 & Class 3
0.05-0.2
0.3-0.8
≤0.04
≤0.04
0.5-1
1-5
0.44-0.65
WP12 Class 1 & Class 2
0.05-0.2
0.3-0.8
≤0.045
≤0.045
≤0.6
0.8-1.25
0.44-0.65
WP22 Class 1 & Class 3
0.05-0.15
0.3-0.6
≤0.04
≤0.04
≤0.5
1.9-2.6
0.87-1.13
WP91
0.08-0.12
0.3-0.6
≤0.02
≤0.01
0.2-0.5
8-9.5
0.85-1.05
≤0.4
WP911
0.09-0.13
0.3-0.6
≤0.02
≤0.01
0.1-0.5
8.5-10.5
0.9-1.1
≤0.4
Mechanical properties
Item
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation%
WP5 Class 1
415-585
≥205
≥20
WP5 Class 3
520-690
≥310
≥20
WP9 Class 1
415-585
≥205
≥20
WP9 Class 3
520-690
≥310
≥20
WP11 Class 1
415-585
≥205
≥20
WP11 Class 2
485-655
≥275
≥20
WP11 Class 3
520-690
≥310
≥20
WP12 Class 1
415-585
≥220
≥20
WP12 Class 2
485-655
≥275
≥20
WP22 Class 1
415-585
≥205
≥20
WP22 Class 3
520-690
≥310
≥20
WP91
585-760
≥415
≥20
WP911
620-840
≥440
≥20
Alloy Cap
Alloy Cap,Pipe Cap,Seamless Cap,Steel Cap,Cap End
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