So you're just looking for someone to give you free engineering? Not sure if you're grasped what this site is about. Your other fairly brief questions indicate a junior engineer, but asking for free engineering like a specification is frowned upon here and I hope no-one provides you with one. Your company really should have one from past projects or your supervisor should be issuing one.
The global specification for long radius bends is ASME B 16.9.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.