Such a housing must block RF as well as other electrical noise. I bet it would be bulky and may stop the very features of why you want an iPhone.
Again, since it is such a location, is it worth the risk? Or are you taking a chance with other folk's lives too?
In other words, let your safety officer clear this.
i am looking for a housing or something that will make it okay to use my iphone in an explosive area. any thoughts?