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This standard provides the principle, device and operation of measuring the bubble size and number-based bubble size distribution of microbubbles in liquid media by the in-situ dynamic image analysis method. The standard is suitable for microbubbles dispersed in transparent liquid media with bubble sizes ranging from 1 micron to 500 micron. The upper limit of bubble concentration depends on…

This document specifies fundamental requirements for uncut finished spectacle lenses. This document is not applicable to protective spectacle lenses. This document takes precedence over the corresponding requirements of other standards, if differences exist.

This document is applicable to two-way or multi-way ball valves manufactured with all types of polypropylene (PP) and chlorinated polyvinylchloride (PVC-C) thermoplastic materials to be used for the transport of pressurized water whether or not intended for human consumption (domestic systems) for applications in buildings and utility branches. NOTE 1 The two-way valve is generally used for…

This document provides appraisal framework to create and use urban management information derived from statistics, objectives, indicators and long-term goals for sustainable development of cities and communities. This document enables numerous combinations of data sources and data processing methods, making it easier to create and maintain urban management information and get ready for value…

This International standard specifies requirements for dried lime (Citrus aurantifolia – Christm. – Swingle, Citrus latifolia Tanaka, family Rutaceae) in whole, slices and ground form. The term "Dried Lime" includes dehydrated lime by sun and/or artificially dried.  Recommendation relating to storage and transport conditions is given in the annex A.

This International Standard proposal specifies technical requirements and test method for temperature sensor in radiosonde. This International Standard is applicable to the temperature measurement traceable to SI unit in boom sensors according to variations of pressure and air speed under the simulated conditions of upper air. This proposed standard will mainly provide a) Terms and definitions…

ISO 19581 specifies a screening test method to quantify rapidly the activity concentration of gamma-emitting radionuclides, such as 131I, 132Te, 134Cs and 137Cs, in solid or liquid test samples using gamma-ray spectrometry with lower resolution scintillation detectors as compared with the HPGe detectors (see IEC 61563). This test method can be used for the measurement of any potentially…

A new International Standard in the area of concrete technology, with specific scope on use of recycled aggregates for concrete, which are produced from construction and demolition wastes including demolished concrete and demolished masonry units. Recycled aggregates include both coarse aggregates and fine aggregates.

The standard «criterias for quality internships» will define terms and concepts related to internships, a quality framework for internships, quality criteria, and best practices. The document is intended for companies, the public sector and other host organizations, individuals interested in or taking part in internships (either for students or non-students), higher education institutions, public…

This document specifies the minimum requirements for airworthiness approval of air cargo pallets, nets and containers, generally designated as air cargo unit load devices (ULD). This document is intended to provide a uniform technical reference for air cargo unit load devices approval. As a prerequisite, it is presupposed that the applicable general civil aviation requirements and the aircraft…