Abstract
A pipe spacer for separating inner and outer pipes of a double-walled pipe is disclosed including an inner circumferential bearing surface for contacting an inner pipe of a double-walled pipe assembly; an outer circumferential bearing surface for contacting an outer pipe of the double-walled pipe assembly; at least three inner lobes, each of the inner lobes having an apex on which lies the inner circumferential bearing surface; and the outer circumferential bearing surface is curved in two orthogonal directions.