Category: EN standards

1 General 1.1 Scope This standard specifies the performance requirements for high-pressure mercury vapour lamps for general lighting purposes, with or without a red correcting fluorescent coating. For some of the requirements given in this standard, reference is made to “the relevant lamp data sheet”. For some lamps these data sheets are contained in this standard. For other lamps, falling […]

1 Scope This International Standard establishes the thermal classification of an electrical insulation system (EIS). It also identifies recognized procedures for the thermal evaluation of EIS. This standard is applicable to EIS used in electrotechnical devices where the thermal factor is the dominating ageing factor. 2 Normative references The following normative documents contain provisions which, through reference in this text, […]

1 Scope This part of ISO 51 83 specifies the dimensions and tolerances of resistance spot welding electrode adaptors where the fixing element for the cap (see ISO 5821 ) is a male taper of 1 :1 0 and a parallel shaft is used to fix the adaptor to the electrode holder in accordance with ISO 8430-3. 2 Normative references […]

This part of ISO 6974 describes a gas chromatographic method for the quantitative determination of natural gas constituents using a three-column system. This method is applicable to natural gases of limited range, on-line and automatically calibrating on a regular basis for gas samples not containing any hydrocarbon condensate and/or water. It is applicable to the analysis of gases containing constituents […]

1 Scope This part of ISO 10360 establishes a vocabulary for coordinate measuring machines (CMM)， and their acceptance and reverification tests. 2 General terms 2.1 coordinate measuring machine CMM measuring system with the means to move a probing system (2.6) and capability to determine spatial coordinates on a workpiece surface NOTE For a description of some common CMMs and their […]

2 Definitions 2.1 background L evel of fluorescent penetrant or colour contrast penetrant left on the surface of the component after the removal of excess penetrant. 2.2 bath Quantity of liquid-penetrant inspection materials (penetrant, emulsifier, developer) into which parts are immersed during the test. 2.3 bleedout Egress of penetrant from a discontinuity, usually aided by developer. 2.4 colour contrast penetrant […]

This International Standard specifies minimum requirements and gives guidance for the design and installation of new piping systems on production platforms located offshore for the petroleum and natural gas industries. It covers piping systems up to 69 000 kPa (ga) maximum, within temperature range limits for the materials meeting the requirements of ASME B31.3. NOTE For applications outside these pressure […]

1 Scope 1.1 This part of EN 1 0263 is applicable to round rod and bars and wire with a diameter up to and including 1 00 mm, of non-alloy and alloy steel, intended for cold heading and cold extrusion without subsequent heat treatment on the final components. 1.2 This part of EN 1 0263 is complemented by EN 1 […]

7 Requirements 7.1 General All tests (including corrosion rsistance test) shall be deferred until the expiy ofa period of 24 h alter the chromating process has ended. NOTE Chromase conversion comigs harden wth age by gradual dehydration They should theretore be handed caretully lor the tirst 24 h ather the treatmnent. 7.2 Appearance Over the signicant sutace, the electroplated articles […]

1 Scope This standard specilies the requirements tor the design, perlormance and lesting of ftings made of malleable cast iron (see also clause 5 Materials) with compression ends ftor polyethylene piping systems. It applies to piping systems in polyothylene (PE) materlals for diferent aplication fiolds, such as water and gas supply, water distribution, irigation and gaseous fuel systems. The malleable […]