This European standard defines terms , establishes manufacturing, safety and functional requirements and corresponding tests and specifies data for marking , labeling and instructions for use , for pressure cookers. This standard is applicable to portable pressure cookers for domestic use , with gross volume up to 25 I , with working pressure over 4 kPa and less than 150kPa, with either integrated or independent heating . Note : All pressures mentioned in this text are related to atmospheric pressure .