This International Standard specifies the requirements and relevant methods of measurement and testing of two types of thermoplastic hoses with maximum design working pressure of 1 MPa and of 2 MPa, used for flexible gas supply lines in specific fields of application as follows: — small kits for brazing and welding in accordance with ISO 14112; — air-aspirated blowpipes for welding and allied processes; — miniature welding such as jewellery work, dental work excluding acetylene applications; — arc welding with shielding gas. NOTE 1 This International Standard does not exclude the use of rubber hoses in the same fields of application. Rubber hoses for these applications are covered by ISO 3821. This standard does not apply to hoses for liquefied petroleum gases (LPG) in liquid phase or to acetylene. The hose manufacturer shall be consulted for compatibility of the hose to hydrogen application.