In what instances can Bushings be Used in Fuel Gas Piping

[prichmon]

Could someone please verify my research on the use of bushings in fuel gas pipe?

My understanding from searching on Google is only malleable iron when reducing more than 1 size is acceptable. No Cast Iron.

1209.5.8.4 Metallic Fittings (Including
Valves, Strainers, Filters). [NFPA 54:
5.6.8.4]
(5) Cast-Iron Fittings.
(a) Flanges shall be permitted.
(b) Bushings shall not be used.

 

[trashcanman]

True. International Fuel Code says bushings not allowed for cast iron pipe. Also, bushings not allowed within concealed locations, no matter what pipe.