ISO 22827-1:2005 specifies basic requirements and test methods for acceptance testing of high-power (average power more than 100 W), lamp-pumped or laser-diode-pumped Nd:YAG laser beam welding machines for seam welding with optical fibre delivery systems.

ISO 22827-1:2005 applies to the beam generating system, the optical delivery system and the devices for shielding and assist gases.