Judgment of the Court (Ninth Chamber) of 10 February 2022.#DIMCO Dimovasili M.I.K.E. v Ypourgos Perivallontos kai Energeias.#Request for a preliminary ruling from the Symvoulio tis Epikrateias.#Reference for a preliminary ruling – Approximation of laws – Directive 97/23/EC – Pressure equipment – CE marking – Placing on the market and putting into service – Restrictions aimed at ensuring the protection of persons – Articles 34 and 36 TFEU – National legislation imposing restrictions on the method of installation of gas pipes.#Case C-499/20.