Kemiteknik

This document gives guidance on the general procedures to be followed in the sampling and preparation for analysis of wood preservatives and preservative-treated timber. This document is applicable to the provision of appropriate samples for analysis which can be used to check the content of active and other ingredients in preservative formulations, and the content of active and other ingredients of wood preservatives in treated timber, either before, during or after the service life of the timber. NOTE 1 Methods of sampling creosote and creosote-treated timber are described in EN 1014-1, EN 1014-2 and EN 12490. These are used in preference to the recommendations in this document. NOTE 2 No attempt has been made in this document to lay down detailed procedures to be adopted for control purposes at manufacturing plants where large volumes of preservatives are sampled. Nor does it attempt to establish procedures for checking the compliance of batches of treated timber with specifications demanding a defined level of treatment (see 6.2).

This document specifies the quality characteristics of liquid or gaseous hydrogen fuel dispensed at hydrogen refuelling stations for use in proton exchange membrane (PEM) fuel cell vehicle systems, and the corresponding quality assurance considerations for ensuring uniformity of the hydrogen fuel.

This document specifies criteria for safety and environmental considerations of different refrigerants used in refrigeration and air conditioning.This part of EN 378 specifies the classification and selection criteria applicable to refrigerating systems.These classification and selection criteria are used in prEN 378‑1, prEN 378‑2, prEN 378‑3 and ISO 5149‑4:2022. Product family standards dealing with the safety of refrigerating systems take precedence over horizontal and generic standards covering the same subject.