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  2. Pressure Equipment Directive (EU) - Wikipedia

    en.wikipedia.org/wiki/Pressure_Equipment...

    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.

  3. Safety valve - Wikipedia

    en.wikipedia.org/wiki/Safety_valve

    An oxygen safety relief valve DN250-safety valves. A safety valve is a valve that acts as a fail-safe.An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits.

  4. NSF International - Wikipedia

    en.wikipedia.org/wiki/NSF_International

    NSF International, originally named the National Sanitation Foundation (NSF), was founded in 1944 by the University of Michigan School of Public Health, in an attempt to standardize requirements around sanitation and food safety. [1] The first standards developed by the NSF set sanitation requirements on soda fountain and luncheonette equipment.

  5. ISO/IEC 17025 - Wikipedia

    en.wikipedia.org/wiki/ISO/IEC_17025

    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.

  6. Relief valve - Wikipedia

    en.wikipedia.org/wiki/Relief_valve

    A relief valve DN25 on cooling water pipe from heat exchanger Schematic diagram of a conventional spring-loaded pressure relief valve. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.

  7. List of IEC standards - Wikipedia

    en.wikipedia.org/wiki/List_of_IEC_standards

    IEC 60067 Dimensions of electronic tubes and valves; IEC 60068 Environmental testing; IEC 60071 Insulation co-ordination; IEC 60072 Dimensions and output series for rotating electrical machines; IEC 60073 Basic and safety principles for man-machine interface, marking and identification – Coding principles for indicators and actuators

  8. Product certification - Wikipedia

    en.wikipedia.org/wiki/Product_certification

    product certifications (many nations) Product certification or product qualification is the process of certifying that a certain product has passed performance tests and quality assurance tests, and meets qualification criteria stipulated in contracts, regulations, or specifications (sometimes called "certification schemes" in the product certification industry).

  9. Certified reference materials - Wikipedia

    en.wikipedia.org/wiki/Certified_reference_materials

    Since most analytical instrumentation is comparative, it requires a sample of known composition (reference material) for accurate calibration. These reference materials are produced under stringent manufacturing procedures and differ from laboratory reagents in their certification and the traceability of the data provided.

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