Twisted, No offense, but I will not give advice out on a World Wide Web site on how to do this, there is a lot of information on how to do it on the “web”, and on this site that you can research and make your decision on how to proceed. I have worked in the natural gas industry for 37 yrs. as a welder working on live gas lines daily, and use my training at my own expense, along with the proper tools to ensure that I’m not working on an explosive atmosphere to keep me safe. Can it be performed safely, yes, but only when proper procedures are followed. You can PM me with questions and I will provide you with some advice