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The Pressure Equipment Directive (PED) 2014/68/EU (formerly 97/23/EC) [1] of the EU sets out the standards for the design and fabrication of pressure equipment ("pressure equipment" means steam boilers, pressure vessels, piping, safety valves and other components and assemblies subject to pressure loading) generally over one liter in volume and having a maximum pressure more than 0.5 bar gauge.
ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories is the main standard used by testing and calibration laboratories. In most countries, ISO/IEC 17025 is the standard for which most labs must hold accreditation in order to be deemed technically competent.
IEC 62446 Grid connected photovoltaic systems – Minimum requirements for system documentation, commissioning tests and inspection; IEC 62455 Internet protocol (IP) and transport stream (TS) based service access; IEC 62464 Magnetic resonance equipment for medical imaging; IEC 62471 Photobiological safety of lamps and lamp systems
ISO 8528-3:2005 Part 3: Alternating current generators for generating sets; ISO 8528-4:2005 Part 4: Controlgear and switchgear; ISO 8528-5:2013 Part 5: Generating sets; ISO 8528-6:2005 Part 6: Test methods; ISO 8528-7:2017 Part 7: Technical declarations for specification and design; ISO 8528-8:2016 Part 8: Requirements and tests for low-power ...
ISO 10012:2003, Measurement management systems - Requirements for measurement processes and measuring equipment is the International Organization for Standardization (ISO) standard that specifies generic requirements and provides guidance for the management of measurement processes and metrological confirmation of measuring equipment used to support and demonstrate compliance with metrological ...
As an example, a manual process may be used for calibration of a pressure gauge. The procedure requires multiple steps, [ 12 ] to connect the gauge under test to a reference master gauge and an adjustable pressure source, to apply fluid pressure to both reference and test gauges at definite points over the span of the gauge, and to compare the ...
A calibration gas is a reference gas or gas mixture used as comparative standard in the calibration of analytical instruments, like gas analysers or gas detectors. Therefore, a calibration gas has to be of a precisely defined nature or composition, like zero gas or span gas , for example 500 ppm carbon monoxide in nitrogen.
The different components are put together to meet the operating requirements of the unit. See the attached illustration of a Modular HRSG General Arrangement. Modular HRSGs can be categorized by a number of ways such as direction of exhaust gas flow or number of pressure levels. Based on the flow of exhaust gases, HRSGs are categorized into ...