Toimialayhteisöt

ISO 16526-2:2011 specifies a constancy check of a X-ray system where mainly the X-ray voltage is checked and also the tube current and the constitution of the target which can be changing due to ageing of the tube.The thick filter method is based on a measurement of the dose rate behind a defined thick filter using defined distances between the X-ray tube, the filter and the measuring device.This method is very sensitive to changes of the voltage, but it does not provide an absolute value for the X-ray tube voltage. Therefore, a reference value is needed and, it is recommended to find this reference, for example, within the acceptance test of the system.The thick filter method is a rather simple technique and may be applied by the operator of an X-ray system to perform regularly a constancy check of the system.The method can also be applied for consistency checks after changing components which may affect the X-ray tube voltage.This method can be applied for all types of X-ray systems, i. e. for constant potential, half wave and impulse wave generators with a tube current larger than 1 mA.

ISO 16526-3:2011 specifies the test method for a non-invasive measurement of X-ray tube voltages using the energy spectrum of X-rays (spectrometric method). It covers the voltage range from 10 kV to 500 kV.The intention is to check the correspondence of the actual voltage with the indicated value on the control panel of the X-ray unit. It is intended to measure the maximum energy only and not the complete X-ray spectrum.The procedure is applicable for tank type and constant potential X-ray units.

This document defines requirements and recommendations dealing with the quality of the air on civil aircraft concerning chemical compounds potentially originating from, but not limited, to, the ventilation air supplied to the cabin and flight deck.A special emphasis is on the engine and APU bleed air contaminants potentially brought into the cabin through the air conditioning, pressurization and ventilation systems.The document is applicable to civil aircraft in operation from the period that is defined as when the first person enters the aircraft until the last person leaves the aircraft.The document defines requirements and recommendations in relation to the presence of, and means to prevent exposure to, chemical compounds, including those that could cause adverse effects, taking into account the Precautionary Principle.

This document specifies requirements for two types of hose assemblies (Types D and SD) and four grades based on electrical properties with hoses made of rubber or thermoplastics and hose fittings made of metal designed to convey liquid or gaseous chemical substances, hereinafter termed the “chemicals conveyed”.The hose assemblies are intended for use with chemicals conveyed in the temperature range of –20 °C to +65 °C at a working pressure = 10 bar1).NOTE 1 This document sets out requirements for these hose assemblies to ensure that users are not exposed to danger from fire or explosion and that the environment is protected against contamination or damage.NOTE 2 Other temperatures and working pressures than those given above can be agreed with the manufacturer, provided that the marking on the hose (see 14.1) states this and the requirements of Table 5 and all the other requirements are met.NOTE 3 Other diameters than those given in this document can be agreed with the manufacturer.NOTE 4 This document also provides guidance on the storage of hose assemblies (Clause 15).NOTE 5 The attention of users is drawn to Annex F concerning the selection of lining material related to the chemical(s) to be conveyed by the hoses and/or hose assemblies.This document does not apply to hose assemblies for:— aircraft refuelling (EN ISO 1825);— fuel dispensing (EN 1360);— oil burners (EN ISO 6806);— refrigerant circuits;— fuel truck delivery (EN 1761);— liquid petroleum gases (LPG) (EN 1762, EN 16436-2);— fire-fighting (EN ISO 14557);— oil suction and discharge (EN 1765);— rotary drilling (EN ISO 6807);— fuel dispensing with vapour recovery systems (EN 13483);— anhydrous ammonia (EN ISO 5771).This document does not apply to multilayer hose assemblies (EN 13765 and EN 13766).

This document specifies requirements for two types of thermoplastic multi-layer (non-vulcanized) transfer hoses and hose assemblies for carrying liquefied petroleum gas and liquefied natural gas. Each type is subdivided into two classes, one for onshore duties, and the other for offshore.This document is applicable for hose sizes from 25 mm to 250 mm, working pressures from 10,5 bar to 25 bar and operating temperatures from - 196 °C to + 45 °C.NOTE Offshore LNG hose assemblies are also specified in EN 1474-2 [1].

This International Standard specifies the methodology for the regular monitoring of the test methodprecision achieved versus precision published in the standard test method using data from ProficiencyTesting Programs (PTP) supported by the regular users of standard test methods.The procedures in this International Standard are designed specifically for PTPs conducted on standardtest methods for petroleum and petroleum related products, which are presumed to be homogeneous.The procedures in this document are designed specifically for standard test methods with publishedreproducibility derived from ISO 4259-1 or equivalent (such as ASTM D6300[1]) for petroleum andpetroleum related products, which are normally considered as homogeneous.In particular, this document specifies the methodology for the statistical comparison of standarddeviation under reproducibility conditions achieved in PTP versus that published.Purpose of this comparison is to ascertain if the published reproducibility precision is representative ofthat achievable by the regular participants in the PTP.

This standard specifies a method for the measurement of iron-55 and nickel-63 (55Fe and 63Ni)in all types of waters by liquid scintillation counting (LSC).The detection limit depends on the sample volume and the instrument used. The test method described in this standard is based on currently available LSC counters.

This document specifies minimum requirements for materials, design, construction and workmanship procedures, and tests for welded LPG road tanker pressure vessels and their welded attachments manufactured from carbon, carbon/manganese and micro alloy steels.There is no upper size limit as this is determined by the gross vehicle weight limitation.This document does not cover pressure vessels for pressure vessel containers.NOTE 1 In the context of this document, the term “road tanker” is understood to mean “fixed tanks” and “demountable tanks” as defined in ADR.NOTE 2 The equipment for the pressure vessels and the inspection and testing after assembly is covered by EN 12252 and EN 14334, respectively.NOTE 3 The design type of the road tanker is subject to approval by the competent authority, as required by ADR.NOTE 4 This document is intended for LPG only; however, for other liquefied gases see EN 14025.