Patent ID: 7487745

Claim:
A steam generating boiler comprising: a combustion chamber comprising two or more boiler tubes, wherein each boiler tube comprises an inner diameter and an outer diameter, wherein difference between the outer diameter and the inner diameter is wall thickness of the boiler tubes; and one or more boiler tube position retainer assemblies, wherein each boiler tube position retainer assembly is positioned between two boiler tubes, a first boiler tube and a second boiler tube, wherein each boiler tube position retainer assembly further comprises: a male boiler tube pad comprising a male tab ear portion and a male saddle clip portion, wherein the male saddle clip portion has a tube shape configuration to saddle the first boiler tube, wherein wall thickness of the male saddle clip portion is less than the wall thickness of the first boiler tube to allow for failure to occur on the male boiler tube pad before failure of the first boiler tube, and wherein the male tab ear portion has an alignment hole; a female boiler tube pad comprising two female tab ear portions and a female saddle clip portion, wherein the female saddle clip portion has a tube shape configuration to saddle the second boiler tube, wherein wall thickness of the female saddle clip portion is less than the wall thickness of the second boiler tube to allow for failure to occur on the female boiler tube pad before failure of the second boiler tube, and wherein each female tab ear portion has an alignment hole; a retainer pin for insertion through the alignment holes following alignment of the alignment holes by positioning the male tab ear portion between the two female tab ear portions; wherein the diameter of the retainer pin is less than the diameter of the alignment holes to allow movement of the male and the female boiler tube pads around the axis of the retainer pin, and wherein the retainer pin hangs to allow movement of the male and the female boiler tube pads along the length of the retainer pin; and wherein the two female tab ear portions are attached to the female saddle clip portion to allow for space between the female tab ear portions and the male tab ear portion after positioning of the male tab ear portion between the female tab ear portions, wherein the male and the female tab ear portions are not in contact to allow for movement of the male and the female boiler tube pads long the length of the retainer pin.