5F Single Run to Multiple Run Qualification? Home › Forums › General › Standards and codes › 5F Single Run to Multiple Run Qualification? This topic contains 0 replies, has 36 voices, and was last updated by JTMMMBrazil 8 months, 1 week ago. Viewing 1 post (of 1 total) Author Posts January 19, 2018 at 5:29 am #1212 JTMMMBrazilMember Hi, Can anyone provide me response on this query? If a welder is qualified for 5F single runs fillet weld (Pipe), Is he also qualified to weld multiple run fillet? Appreciate any response.. Thanks, Jon Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.