Category: EN standards

5 Sampling Three specimens shall be selected from the elementary unit or from the laboratory sample. NOTE 1 GMT is normally delivered in stacks of blanks, not in the full width of sheets as manufactured. Their size and shape may influence how the sample is taken. If the blank is of sufficient size, take all three specimens from the one […]

4.3.2 Sizing 4.3.2.1 Instantaneous heating systems Heat emitters shall be dimensioned taking the design heat loss into consideration. The minimum required output of the installed heat emitters shall be in accordance with EN 12831 and EN 60675 and the heat emitters manufacturer’s data. The system designer shall consider the effect of occupancy times and reheat periods to optimize the use […]

1 Scope This European Standard specifies an ultrasonic method to determine the components of the elasticity tensor of ceramic matrix composite materials at room temperature. Young’s moduli, shear moduli and Poisson coefficients,can be determined from the components of the elasticity tensor. This European Standard applies to ceramic matrix composites with a continuous fibre reinforcement: unidirectional (1D), bidirectional (2D), and tridirectional […]

1 Scope This European Standard specifies requirements for the design, manufacture and testing of closed expansion vessels with built in diaphragm, which will hereinafter be called “vessels”, and a) whose diaphragm serves to separate water on the one hand and air / nitrogen on the other hand in heating/cooling systems or fresh water systems; b) which are manufactured singly or […]

1 Scope This European Standard specifies, the dimensional, the physico-chemical, the design, the hydraulic, the mechanical and the acoustic characteristics of mechanical disconnector, direct actuated Family G, type A. This European Standard is applicable to mechanical disconnector direct actuated in nominal sizes DN 8 up to DN 250, intended to prevent the return of water having lost its original sanitary […]

1 Scope This European Standard specifies a method for accelerated wear and corrosion, to be used prior to the detection of nickel release from coated items that come into direct and prolonged contact with the skin. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. […]

1 Scope 1.1 Main purpose The purpose of this European Standard is to establish the characteristics and the conformance rules required to synthetically describe the organisation and content of a terminological system in health. This European Standard has been developed to allow the production of specific standards on categorial structures for particular healthcare subject fields with the minimum requirements to […]

1Scope 1.1 This document specifies technical delivery conditions for the products listed below when usedfor the conveyance of water and other aqueous liquids: -seamless and welded non-alloy steel tubes; -end preparation of tubes and fittings for butt welding; —fittings fabricated from tube; —fittings fabricated from plate or strip. NOTE This European Standard contains informative annexes giving guidance on tube sizes […]

4 Information to be supplied by the purchaser 4.1 The purchaser shall select the steel grade, the shape of the product and the dimensions, taking the intended processing and use into account. He may take the manufacturer’s advice in making his choice. The order shall provide all the information necessary for describing the required product and its characteristics and details […]

1 Scope 1.1 This standard specifies general recommendations for the design, construction, testing, commissioning, operation and maintenance of installation pipework; pipework between the delivery point of the gas and the inlet connection to the gas appliance. This standard specifies common basic principles for gas installation pipework. Users of this European standard need to be aware that more detailed national standards […]