Suomen Standardisoimisliitto SFS

EN 15502-1:2020, Clause 1 is replaced by the following:This document specifies, the requirements and test methods concerning, as well as the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners or fully premixed burners, and are hereafter referred to as "boilers".This document is to be used in conjunction with FprEN 15502-1:2020.This document covers certain gas-fired central heating boilers from the types C1 up to C(11) and the types B2, B3 and B5:NOTE 1 For further background information on appliance types see EN 1749:2020.a) that have a nominal heat input (on the basis of net calorific value) not exceeding 1 000 kW;b) that use one or more combustible gases of the three gas families at the pressures stated in EN 437:2018;c) where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;d) where the maximum operating pressure in the water circuit does not exceed 6 bar;e) which can give rise to condensation under certain circumstances;f) which are declared in the instructions for installation to be either a "condensing" boiler or a "low temperature boiler" or a "standard boiler"; if no declaration is given the boiler is to be considered a "standard boiler";g) which are intended to be installed inside a building or in a partially protected place;h) which are intended to produce also hot water either by the instantaneous or storage principle as a single unit;i) which are designed for either sealed water systems or for open water systems;j) which are either modular boilers, or non modular boilers.k) which are from the types C(10) that are equipped with a gas-air ratio control and that have a ?pmax, saf(min) of 25 Pa, and C(11) that have condensing boiler modules that are equipped with a gas-air ratio control and that have a ?pmax, saf(min) of 25 Pa.NOTE 2 This document provides requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard, the risk associated with this alternative construction needs to be assessed.An example of an assessment methodology, based upon risk assessment, is given in Clause 11.This document does not cover all the requirements for:aa) appliances above 1 000 kW;ab) appliances that are intended to be connected to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance (see Annex AB);ac) appliances using flue dampers;ad) appliances of the types B21, B31, B51, C21, C41, C51, C61, C71, C81, C(12) and C(13);ae) C7 appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW;af) appliances incorporating flexible plastic flue liners;ag) C(10) boilers:1) without a gas-air ratio control, or2) which are non-condensing appliances, or3) which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (?pmax, saf(min));ah) C(11) boilers that have boiler modules:1) without a gas-air ratio control, or2) which are non-condensing appliances, or3) which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (?pmax, saf(min));ai) appliances intended to be connected to a flue having mechanical extraction;aj) surface temperatures of external parts particular to children and elderly people;ak) appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gas;al) appliances equipped with an adaptive combustion control function (ACCF);am) boilers intended to be installed in areas accessible to elderly people and children.

This document covers the requirements for the design, installation, operation, maintenance and the safety of Household Biogas Systems (HBSs), producing biogas in an amount equivalent to an installation capacity of less than 100 MWh per year.The document applies to HBSs comprising of pipeline and equipment with pressure levels of less than 5 kPa.Any equipment or appliances connected to an HBS or utilizing the biogas energy of an HBS are not a part of the scope of this document.

This document defines terms and describes classifications related to biogas production by anaerobic digestion, gasification from biomass and power to gas from biomass sources, biogas conditioning, biogas upgrading and biogas utilization from a safety, environmental, performance and functionality perspective, during the design, manufacturing, installation, construction, testing, commissioning, acceptance, operation, regular inspection and maintenance phases.Biogas installations are, among others, applied at industrial plants like food and beverage industries, waste water treatment plants, waste plants, landfill sites, small scale plants next to agricultural companies and small scale household installations.The following topics are excluded from this document:— boilers, burners, furnaces and lightening, in case these are not specifically applied for locally produced biogas;— gas-fuelled engines for vehicles and ships;— the public gas grid;— specifications to determine biomethane quality;— transportation of compressed or liquefied biogas;— transportation of biomass or digestate;— assessment and determination whether biomass is sourced sustainably or not.This document describes the following for information purposes as well:— the parameters to determine the size (e.g. small, medium-sized, or large scale);— the parameters to determine the type of installation (e.g. domestic, industrial);— the parameters to describe the type of technique;— terms and processes in order to develop health, safety and environmental protection guidelines for biogas installations.NOTE For an explanation of the Scope, see Annex A.

This document applies to the design, manufacture, installation and operation of flares for the combustion of biogas. Test methods and performance requirements are also included.Biogas systems are amongst others applied at industrial plants like food and beverage industries, waste water treatment plants, waste plants, landfill sites, small scale plants next to agricultural companies and small-scale household systems.

The ISO series 13317 covers methods for determining the distributions of sedimentation velocities and particle size of particulate materials by gravitation-induced particle migration in liquids. The direction of this motion depends on the density difference (density contrast) between dispersed and continuous phase. During the measurement, particles should not undergo any physical or chemical change in the continuous phase (liquid). The primary measurand is the particle velocity distribution, which is converted into size distribution based on established sedimentation theory. The measurement techniques described in this ISO series are applicable to liquid dispersions, like suspensions and emulsions. The measurable particle size range depends on materials properties and typically reaches from 200 nm to 100 µm for aqueous samples, whereas sedimentation velocity can be quantified in the range from 0,6 µm/s to 10 mm/s. Sedimentation analysis is conducted for low particle concentrations. The maximum permissible value depends on measurement technique and theory of analysis. In general, the volume fraction of particle should not exceed 1 %. This part of ISO series 13317 addresses the principles of particle size analysis by gravitational sedimentation, the principal types of measurement techniques as well as general rules for conducting measurements, method validation, determination of the uncertainty budget and representation of results. This standard covers neither particle migration by centrifugal, electric or magnetic forces nor sedimentation at high particle concentrations (e.g. zone sedimentation). Moreover, it does not deal with the determination of properties other than sedimentation velocity and particle size (i.e. neither particle concentration, particle shape, particle density, zeta-potential nor apparent viscosity). It is the responsibility of the user of this part of ISO 13317 to establish appropriate safety and health practices and to determine the applicability of the regulatory limitations prior to its use.

This International Standard specifies a number of metadata elements that describe resources containing medical knowledge, primarily digital documents provided as web resources, accessible from databases or via file transfer, but can be applicable also to paper documents, e.g. articles in the medical literature. The metadata elements: The metadata elements defined in this International Standard are not intended to:

This document specifies a method for the determination of the efflux time at 40 °C of bituminous emulsions in seconds using an efflux viscometer. Alternative test temperature is 50 °C.NOTE The procedure described in this document can also be followed to determine efflux time at other temperatures such as 25 °C.WARNING - The use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

This document specifies a method for the determination of the efflux time at 25 °C of petroleum cut-back and fluxed bituminous binders in seconds using an efflux viscometer. Alternative test temperatures are 40 °C, 50 °C and 60 °C.WARNING - The use of this document involves hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

This document specifies the planning issues, requirements and procedures for the conversion and/or migration of digital records in order to preserve the authenticity, reliability, integrity and usability of such records as evidence of business functions, processes, activities and transactions. These procedures do not comprehensively cover:

This document establishes the principles, specifies the requirements and provides guidance for the development and implementation of an escape, evacuation and rescue (EER) plan. It is applicable to offshore installation design, construction, transportation, installation, offshore production/exploration drilling operation service life inspection/repair, decommissioning and removal activities related to petroleum and natural gas industries in the arctic and cold regions.Reference to arctic and cold regions in this document is deemed to include both the Arctic and other locations characterized by low ambient temperatures and the presence or possibility of sea ice, icebergs, icing conditions, persistent snow cover and/or permafrost.This document contains requirements for the design, operation, maintenance, and service-life inspection or repair of new installations and structures, and to modification of existing installations for operation in the offshore Arctic and cold regions, where ice can be present for at least a portion of the year. This includes offshore exploration, production and accommodation units utilized for such activities. To a limited extent, this document also addresses the vessels that support ER, if part of the overall EER plan.While this document does not apply specifically to mobile offshore drilling units (MODUs, see ISO 19905-1) many of the EER provisions contained herein are applicable to the assessment of such units in situations when the MODU is operated in arctic and cold regions.The provisions of this document are intended to be used by stakeholders including designers, operators and duty holders. In some cases, floating platforms (as a type of offshore installations) can be classified as vessels (ships) by national law and the EER for these units are stipulated by international maritime law. However, many of the EER provisions contained in this document are applicable to such floating platforms.This document applies to mechanical, process and electrical equipment or any specialized process equipment associated with offshore arctic and cold region operations that impacts the performance of the EER system. This includes periodic training and drills, EER system maintenance and precautionary down-manning as well as emergency situations.EER associated with onshore arctic oil and gas facilities are not addressed in this document, except where relevant to an offshore development.