ISO 11372 pdf download Gas cylinders — Acetylene cylinders — Filling conditions and filling inspection 3Filling inspection3.1General Each cylinder shall be submitted to an inspection prior to, during and immediately after flling. Filling of anacetylene cylinder includes determination of its solvent content and replenishment of its solvent,whereapplicable.The items described in 3.2 to 3.5 shall be covered by a filling inspection....