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Hot Tapping Cast Iron

Hot Tapping Cast Iron

Hot Tapping Cast Iron

(OP)
Does anyone have any experience hot tapping cast iron used for natural gas distribution, probably less than 5 psig.  Want to add 4" branch on 4" and above main.  Most solutions involve welding fitting to split sleeve or repair clamp, attaching the sleeve/clamp, then hot tapping.  Split sleeves are way expensive ($2000 +) Haven't found satisfactory solution at reasonable cost (say $300 for clamp/split sleeve).  Are there methods of hot tap and thread?

RE: Hot Tapping Cast Iron

I'm not sure about hot tap, but I know Advantica in the UK have been developing a grouted connection for use with cast iron and natural gas to avoid the hot welding, not sure of cost, can dig out contact name if it's any use.

RE: Hot Tapping Cast Iron

(OP)
Glue the fitting on eh?  Intrigueing.  I like it!  A contact name would be appreciated.  Thanks SSC

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