Normy

Obsah

ČSN EN ISO 3960 This document specifies a method for the iodometric determination of the peroxide value of animal and vegetable fats and oils with a visual endpoint detection. The peroxide value is a measure of the amount of oxygen chemically bound to an oil or fat as peroxides, particularly hydroperoxides. The method is applicable to all animal and vegetable fats and oils, fatty acids and their mixtures with peroxide values from 0 meq to 30 meq (milliequivalents) of active oxygen per kilogram. It is also applicable to margarines and fat spreads with varying water content. The method is not suitable for milk fats and is not applicable to lecithins. It is to be noted that the peroxide value is a dynamic parameter, whose value is dependent upon the history of the sample. Furthermore, the determination of the peroxide value is a highly empirical procedure and the value obtained depends on the sample mass. It is stressed that, due to the prescribed sample mass, the peroxide values obtained can be slightly lower than those obtained with a lower sample mass. Milk and milk products (or fat coming from milk and milk products) are excluded from the scope of this document. NOTE 1: A preferred method for the iodometric determination of the peroxide value for milk fats is specified in ISO 3976. NOTE 2: A method for the potentiometric determination of the peroxide value is given in ISO 27107.

Obsah

ČSN EN ISO 6883 This document specifies a method for the determination of the conventional mass per volume ("litre weight in air") of animal and vegetable fats and oils (hereinafter referred to as fats) in order to convert volume to mass or mass to volume. The procedure is applicable to fats only when they are in a liquid state. Milk and milk products (or fat coming from milk and milk products) are excluded from the scope of this document. NOTE: The determination of conventional mass per volume (litre weight in air) using the oscillating U tube method can be found in ISO 18301.

Obsah

ČSN P/CEN 12200-2 This part of EN 12200 gives guidance for the assessment of conformity of formulations, products, joints and assemblies in accordance with EN 12200-1:2016 intended to be included in the manufacturer's quality plan as part of the quality management system and for the establishment of third-party certification procedures. NOTE: In order to help the reader, a basic test matrix is given in Annex A. In conjunction with EN 12200-1:2016, this document is applicable to piping systems made of unplasticized poly(vinyl chloride) (PVC-U) intended to be used for above ground external rainwater, and to fittings and brackets made of acrylic materials which may be used in combination with the pipes.

Obsah

ČSN EN ISO 15876-1 This document specifies the general aspects of polybutene-1 (PB-1) piping systems intended to be used for hot and cold water installations within buildings for the conveyance of water whether or not intended for human consumption (domestic systems) and for heating systems, under design pressures and temperatures according to the class of application (see Table 1). The designation polybutene is used together with the abbreviation PB throughout this document. This document covers a range of service conditions (application classes) and design pressure and pipe dimension classes. Values of TD, Tmax and Tmal in excess of those in Table 1 do not apply. NOTE: It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. It also specifies the test parameters for the test methods referred to in this document. In conjunction with the other parts of ISO 15876, this document is applicable to PB pipes, fittings, their joints and to joints with components of other plastics and non-plastics materials intended to be used for hot and cold water installations.

Obsah

ČSN EN ISO 15876-3 This document specifies the characteristics of fittings for polybutene-1 (PB-1) piping systems intended to be used for hot and cold water installations within buildings for the conveyance of water, whether or not intended for human consumption (domestic systems) and for heating systems under design pressures and temperatures according to the class of application (see ISO 15876-1). The designation polybutene is used together with the abbreviation PB throughout this document. This document covers a range of service conditions (application classes) and design pressure classes. For values of TD, Tmax and Tmal in excess of those in ISO 15876-1:2016, Table 1, this document does not apply. NOTE: It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. It also specifies the parameters for the test methods referred to in this document. In conjunction with the other parts of ISO 15876, this document is applicable to fittings made from PB and to fittings made from other materials which are intended to be fitted to pipes conforming to ISO 15876-2 for hot and cold water installations, whereby the joints conform to the requirements of ISO 15876-5. This document is applicable to fittings of the following types: - socket fusion fittings; - electrofusion fittings; - mechanical fittings; - fittings with incorporated inserts. It is also applicable to fittings made from alternative materials which, when fitted to pipes conforming to ISO 15876-2, conform to the requirements of ISO 15876-5.

Obsah

ČSN EN ISO 15876-5 This document specifies the characteristics of the fitness for purpose of polybutene-1 (PB-1) piping systems, intended to be used for hot and cold water installations within buildings for the conveyance of water, whether or not intended for human consumption, (domestic systems) and for heating systems, under design pressures and temperatures according to the class of application (see ISO 15876-1). The designation polybutene is used together with the abbreviation PB throughout this document. This document covers a range of service conditions (application classes) and design pressure classes. For values of TD, Tmax and Tmal in excess of those in ISO 15876-1:2016, Table 1, this document does not apply. NOTE: It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. It also specifies the test parameters for the test methods referred to in this document. In conjunction with the other parts of ISO 15876, it is applicable to PB pipes, fittings, their joints and to joints with components of other plastics and non-plastics materials intended to be used for hot and cold water installations.

Obsah

ČSN EN ISO 20567-1 This document specifies three methods for the evaluation of the resistance of automobile finishes and other coatings to chilled-iron grit projected onto the surface under test to simulate the impact of small stones.

Obsah

ČSN EN 845-3+A1 Tato norma stanoví požadavky na výztuž do ložných spár zdiva pro nosné účely a pro nenosná použití. Pokud výrobky mají být použity v dutinových stěnách, tato norma zahrnuje pouze použití sítí jako výztuže v ložných spárách a ne jejich chování při umístnění jako stěnových spony přes dutinu ve stěně.

Obsah

ČSN EN 13501-4 Tato evropská norma stanovuje postup pro klasifikaci prvků systémů pro usměrňování pohybu kouře na základě výsledků zkoušek požární odolnosti v rozsahu přímé aplikace příslušné zkušební metody. Klasifikace na základě rozšířené aplikace výsledků zkoušek je také zahrnuta v předmětu této evropské normy. Tato evropská norma se týká následujících výrobků: - potrubí pro odvod kouře; - klapky pro odvod kouře; - kouřové zábrany; - odtahové zařízení pro nucený odvod kouře a tepla (ventilátory), včetně připojení; - odtahové zařízení pro přirozený odvod kouře a tepla. Příslušné dokumenty, které obsahují příslušné zkušební metody, vypracované pro tyto výrobky, jsou uvedeny v kapitole 2.

Obsah

ČSN EN 13501-5 Tato evropská norma stanovuje postupy pro klasifikaci střech/střešních krytin vystavených vnějšímu požáru, založené na čtyřech zkušebních metodách podle CEN/TS 1187:2012 a příslušných pravidlech pro rozšířenou aplikaci. Pro klasifikaci střech/střešních krytin se použijí pouze ty zkušební metody a pravidla pro aplikaci, u nichž se předpokládá odpovídající klasifikace. Výrobky se posuzují ve vztahu k jejich konečnému použití. POZNÁMKA: Rozdíl mezi střechami se strmým sklonem a průčelím (fasádou) v otázce použité zkoušky a klasifikační normy, může podléhat národním nařízením. Obecné informace o čtyřech uvedených zkušebních metodách podle CEN/TS 1187:2012 jsou uvedeny v příloze A.

Obsah

ČSN EN 12566-4 ed. 2 Tato norma stanovuje požadavky na septiky montované ze sestavy prefabrikátů na místě a příslušenství, používané pro venkovní částečné čištění splaškových (domovních) odpadních vod pro skupiny do 50 ekvivalentních obyvatel. Norma stanovuje rozměry potrubí, únosnost, vodotěsnost, označování a hodnocení shody.

Obsah

ČSN EN ISO 12947-2 This document specifies the procedure for the determination of specimen breakdown (end-point of test) by inspection at fixed intervals and is applicable to all textile fabrics including nonwovens apart from fabrics where the specifier indicates the end performance as having a low abrasion wear life. This document is not applicable to coated fabrics (including laminated fabrics). If the abrasion behaviour of the coated surface of a coated fabric is to be determined, use the methods described in the various parts of ISO 5470.