Non-destructive testing of steel tubes - Part 10: Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections - Amendment 1: Change the ultrasonic test frequency of transducers; change of acceptance criteria (ISO 10893-10:2011/DAM 1:2019); German and English version EN ISO 10893-10:2011/prA1:2019