Rechercher

This document addresses some of the security requirements in the areas of authentication and other security services through the provision of a set of frameworks upon which full services can be based. Specifically, this Recommendation | International Standard defines frameworks for: ? public-key certificates; and ? attribute certificates. The public-key certificate framework defined in…

1 Scope 1.1 This Standard specifies requirements for measuring the heat recovery efficiency and pressure loss for drain water heat recovery (DWHR) units. 1.2 This Standard applies to DWHR units a) of any size; and b) with a configuration where potable water and drain water flow rate is equal; 1.3 In this Standard, “shall” is used to express a requirement, i.e., a provision that the user…

1 Scope 1.1 This Standard specifies requirements for the durability and safety of drain water heat recovery (DWHR) units. 1.2 This Standard applies to DWHR units of any diameter and length and configuration for use with potable water, and to their components and materials supplied by the manufacturer, their assembly and installation instructions, and their operation after assembly in…

1 Scope 1.1 This Standard covers mechanical couplings that are used to axially join pipes and fittings in non-pressure drain, waste, and vent (DWV) piping systems and sewer piping systems located inside or outside buildings and above ground or underground. Notes: 1) Caution should be exercised when installing mechanical couplings at low temperatures. The coupling manufacturer should be…

1 Scope 1.1 This Standard provides requirements for grade-level, in-ground enclosures. The enclosures are made of polymer concrete, composite, or plastic (enclosure covers may be made of metal), intended for conductors and connections at voltages 750 V or less. 1.2 These enclosures are not intended to be installed where vehicular traffic normally occurs. 1.3 These enclosures are intended to…

Scope This Standard specifies requirements for sharps containers intended to hold potentially hazardous sharps medical waste with or without sharps protection features, e.g., scalpel blades, trocars, hypodermic needles, and syringes. It is applicable to sharps containers that are supplied complete by the manufacturer and to those that are supplied as components intended to be assembled…

1 Scope 1.1 Types of valves in the scope of this Standard The requirements of this Standard apply to automatic valves used in compressed natural gas dispensing systems as specified in Table 1. 1.2 Terminology In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a…

This document contains guidelines for the development and the execution of projects intending to use treated wastewater (TWW) for irrigation and considers the parameters of climate and soil. The purpose of this document is to provide guidance on all elements of a project using TWW for unrestricted and restricted irrigation, including design, materials, construction, and performance, when used for…

This document provides a conceptual and terminological framework for the other ITU-T X.500-series Recommendations | parts of ISO/IEC 9594 which define various aspects of the Directory. The functional and administrative authority models define ways in which the Directory can be distributed, both functionally and administratively. Generic Directory System Agent (DSA) and DSA information models and…

This document provides a conceptual and terminological framework for the other ITU-T X.500-series Recommendations | parts of ISO/IEC 9594 which define various aspects of the Directory. The functional and administrative authority models define ways in which the Directory can be distributed, both functionally and administratively. Generic Directory System Agent (DSA) and DSA information models and…