Hot Tapping Cast Iron

[sloquick]

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?

 

[SSC2002]

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.

 

[sloquick]

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

 

[SSC2002]

The contacts at Advantica are:

Chris Hughes (christopher.hughes@advanticatech.com)
Tel +44(0)1509 282623
or
Mike Jacobs (mike.jacobs@advanticatech.com)
Tel +44(0)1509 283316