General criteria for the operation of various types of bodies performing inspection (ISO/IEC 17020:1998); German and English version EN ISO/IEC 17020:2004
Gas supply - Gas pipework for buildings - Maximum operating pressure less than or equal to 5 bar - Functional recommendations; German version EN 1775:2007— 50 стр.
Conformity assessment - General requirements for third-party marks of conformity (ISO/IEC 17030:2003); German and English version EN ISO/IEC 17030:2009— 19 стр.