GB/T 1226-2017 General pressure gauge
1 Scope
This standard specifies the terms and definitions, product classification, technical requirements, test methods, inspection rules, marking, packaging and storage of general pressure gauge.
This standard is applicable to mechanical pointer pressure gauges, vacuum gauges and compound pressure gauges (hereinafter referred to as instruments) with spring tubes (C-shaped tubes, coil spring tubes and spiral tubes) as elastic elements.
Note: This standard covers stainless steel pressure gauges and pressure gauges with special shaped housings.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2423.10 Environmental testing for electric and electronic products - Part 2: Test methods - Test Fc: Vibration (sinusoidal)
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 17214.3-2000 Operating conditions for industrial-process measurement and control equipment - Part 3:Mechanical influences
GB/T 25480 Basic environmental conditions and testing methods for transportation and storage of instruments
JB/T 5528 Scale and distribution for pressure gauge
JB/T 9252 Industrial process measurement and control instrument Basic types and dimensions of indicating part and general technical requirements for index
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
absolute pressure
pressure with absolute vacuum as zero reference (see Figure 1)
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Figure 1 Schematic diagram for definition of pressure
3.2
positive pressure
pressure greater than atmospheric pressure with the atmospheric pressure as reference (see Figure 1)
3.3
negative pressure
pressure less than atmospheric pressure with the atmospheric pressure as reference (see Figure 1)
3.4
differential pressure
difference between two pressures (see Figure 1)
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging and storage
Annex A (Normative) Additional requirements for instruments used for special media
Annex B (Informative) Safety measures
Annex C (Normative) Test sequence and interval between items
