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prEN 12608-3 Viešoji apklausa

Komentavimo iki data 2025-09-28

Neplastifikuoto polivinilchlorido (PVC-U) profiliuočiai, skirti langams ir durims gaminti. Klasifikavimas, reikalavimai ir bandymo metodai. 3 dalis. Dažytieji PVC-U profiliuočiai

This document specifies the classifications, requirements and test methods for unplasticized poly(vinyl chloride) (PVC-U) profiles covered with paint designed for external uses which are intended to be used for the fabrication of windows and doors. NOTE 1 The terms lacquer, varnish and coating are used as synonyms for paint. NOTE 2 For editorial reasons in this document the term "window" is used for window/door. NOTE 3 For the purpose of production control, test methods other than those specified in this document can be used.

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prEN ISO 182-3 Viešoji apklausa

Komentavimo iki data 2025-09-16

Plastikai. Vinilchlorido homopolimerų ir kopolimerų mišinių ir gaminių polinkio aukštesnėje temperatūroje išskirti vandenilio chloridą ir kitas rūgštines medžiagas nustatymas. 3 dalis. Konduktometrinis metodas (ISO/FDIS 182-3:2025)

This document specifies a method for the determination of the thermal stability at elevated temperature of compounds and products based on vinyl chloride homopolymers and copolymers (in the following text abbreviated as PVC) which undergo dehydrochlorination (the evolution of hydrogen chloride). This document is applicable to the characterization of PVC compounds and products, especially with regard to the effectiveness of their heat-stabilizing systems. It is applicable to coloured PVC compounds and products where a discolouration test under the action of heat may be unsatisfactory. This document is applicable to compounded PVC materials and products. It can be applicable to polymers in powder form under appropriate conditions, to be agreed upon between the interested parties. This document does not apply to PVC compounds in the form of dry blends, since such materials can be not sufficiently homogeneous. This document does not apply to PVC compounds and products which evolve other decomposition products, in addition to hydrogen chloride, at elevated temperatures that can affect the conductivity of water when they are absorbed into it. In this case, a method suitable for the determination of chloride ion (Cl−) in the absorbing solution shall be used (see ISO 182-4[2]). This document can also be applied to other plastics materials which can evolve hydrogen chloride or other hydrogen halides when heated under the conditions prescribed by the relevant specifications, or as agreed upon between the interested parties.

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prEN ISO 19062-2 Viešoji apklausa

Komentavimo iki data 2025-09-16

Plastikai. Akrilnitrilo-butadieno-stireno kopolimero (ABS) liejimo ir ekstruzijos medžiagos. 2 dalis. Bandinių paruošimas ir savybių nustatymas (ISO/DIS 19062-2:2025)

This document specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of acrylonitrile-butadiene-styrene (ABS) moulding and extrusion materials. Requirements for handling the test material and for conditioning both the test material before moulding and the specimens before testing are given. Procedures and conditions for the preparation of test specimens and procedures for measuring properties of the materials from which these specimens are made are given. Properties and test methods which are suitable and necessary to characterize ABS moulding and extrusion materials are listed. The properties have been selected from the general test methods in ISO 10350-1. Other test methods in wide use for, or of particular significance to, these moulding and extrusion materials are also included in this document, as are the designatory properties specified in ISO 19062-1. In order to obtain reproducible and comparable test results, it is intended to use the methods of specimen preparation and conditioning, the specimen dimensions and the test procedures specified in this document. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures.

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prEN ISO 877-3 Viešoji apklausa

Komentavimo iki data 2025-09-16

Plastikai. Švitinimo saulės spinduliuote metodai. 3 dalis. Sutelkta saulės spinduliuote suaktyvintas atmosferinis senėjimas (ISO/DIS 877-3:2025)

ISO 877-3:2018 specifies a method for exposing plastics to concentrated solar radiation using reflecting concentrators to accelerate the weathering processes. The purpose is to assess property changes produced after specified stages of such exposures. The reflecting concentrators used in these exposures are sometimes referred to as "Fresnel reflectors" because in cross-section the array of mirrors used to concentrate the solar radiation resembles the cross-section of a Fresnel lens. General guidance concerning the scope of the ISO 877 series is given in ISO 877‑1. NOTE Additional information about solar concentrating exposures, including a partial list of standards in which they are specified, is given in the Bibliography.

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prEN ISO 3451-1 Viešoji apklausa

Komentavimo iki data 2025-09-04

Plastikai. Pelenų nustatymas. 1 dalis. Bendrieji metodai (ISO/DIS 3451-1:2025)

This document specifies general methods, with suitable test conditions, for the determination of the ash of a range of plastics. The particular conditions chosen can be included in the specifications for the plastic material in question. Particular conditions applicable to poly(alkylene terephthalate) materials, unplasticized cellulose acetate, polyamides and poly(vinyl chloride) plastics, including some specific filled, glass-fibre-reinforced and flame-retarded materials, are specified in ISO 3451-2, ISO 3451-3, ISO 3451-4 and ISO 3451-5.

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prEN 18205 Viešoji apklausa

Komentavimo iki data 2025-09-02

Plastikinių medžiagų suvirinimo procedūrų patvirtinimas

This document specifies a procedure to qualify a preliminary welding procedure specification (pWPS) by welding procedure tests to produce a qualified welding procedure specification (WPS). This document applies to the following thermoplastic welding processes: hot gas welding: round nozzle, speed, wedge; extrusion welding; heated tool welding: butt, socket, wedge. The document applies to the welding of the following products: sheet, pipe (unreinforced, solid wall only); fittings (unreinforced only); lining membrane. This document covers the welding of the following groups of materials: a) for sheets, pipes and fittings: PVC (including all kinds of PVC-U, PVC-C) and ABS; PP; PE; PVDF; ECTFE, PFA and FEP; b) for lining membranes: PVC-P; PE; ECB;PP; c) for pipes and fittings only: PA-U 11 and PA-U 12

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