BS EN ISO is maintained by WEE/ The current release of this standard is: BS EN ISO Approval testing of welders BS EN ISO Approval testing of welders. Copper and copper alloys. The text of EN ISO has been prepared by Technical Committee CEN/TC Welding, the secretariat of which is held by DS, in collaboration with Technical ISOCopyFree download as PDF File.pdf), Text File.txt) or read online for free ISO was prepared by Technical Committee ISO/TC, Welding and allied processes, Subcommittee SC, Qu