This Code of Practice G 493-1 serves as a basis for certifying and awarding the DVGW certification mark to specialised companies that design, manufacture and set up turn-key gas pressure regulating and gas measuring stations.

Quality, safety and security have always been given top priority by the gas industry, and this shall continue to be so in the future. Company certification is indispensable for meeting this goal; this 5th edition of this Code of Practice provides the basis for certification.

This Code of Practice describes not only the qualification criteria to be met by the relevant companies but also - and in some more detail - the fields of work in which appointed experts have to demonstrate particular knowledge. The fact that the Energy Industry Act (EnWG) has now broadened the meaning of the term “biogas” to include hydrogen from renewable sources has created new qualification requirements for appointed experts. These requirements shall be amended if, when and as required.

Only companies that meet the requirements set forth in this Code of Practice are eligible for certification.