Pipe spacer used in welding

Claim 2

A spacer for positioning between the end of a pipe and an internal annular shoulder of a bore of a fitting into which bore said pipe is inserted in preparation for welding the pipe to the fitting, said spacer including a ring-shaped body, said body having a yieldable offset section serving to increase the effective thickness of said spacer and having an outer diametrical dimension approximating the outer diametrical dimension of said pipe whereby said body abuts one of said pipe end and fitting shoulder at said offset section when positioned between said fitting shoulder and pipe end, said offset section being yieldable sufficiently to space said one pipe end or fitting shoulder from the remainder of said spacer to prevent unyielding abutment between the pipe and spacer upon pipe expansion during welding, the improvement comprising a split formed in said spacer body defining spaced ends of the spacer body, said spacer body lying substantially in the same plane except for said offset section, a tab part extending from said spacer body, said tab part projecting generally perpendicularly relative to said plane of the body and constituting means for extending between said fitting and pipe and beyond the fitting to indicate the presence of the spacer when positioned between said pipe end and said fitting shoulder.

Claim 3

The spacer claim 1 an adhesive means applied to said tab part for adhesion to one of said pipe and fitting at the outer surface thereof before and after said welding.

Claim 4

The spacer claim 1 wherein said tab part extends from one of said spacer body ends.

Claim 5

A spacer for positioning between the end of a pipe and an internal annular shoulder of a bore of a fitting into which bore said pipe is inserted in preparation for welding the pipe to the fitting, said spacer comprising a split ring-shaped body, said body having a non-circular cross section with opposite flat surfaces and including spaced ends, a plurality of protruding offset sections formed by said body with the body being substantially coplanar except for said offset sections, said offset sections serving to increase the effective thickness of said spacer, said body having an outer diametrical dimension approximating the outer diametrical dimension of said pipe whereby said body abuts one end of said pipe end and fitting shoulder at said offset sections when positioned between said fitting shoulder and pipe end, said offset sections being generally equal angularly spaced apart about said body and being compressively yieldable sufficiently to space said one pipe end or fitting shoulder from the remainder of said spacer to prevent unyielding abutment between the pipe and spacer upon pipe expansion during welding, and said body ends being spaced sufficiently to accommodate circumferential expansion of said body to prevent abutment of the body ends during said pipe expansion as said offset sections are yieldably compressed.

Claim 6

A spacer for positioning between the end of a pipe and an internal annular shoulder of a bore of a fitting into which bore said pipe is inserted in preparation for welding the pipe to the fitting, said spacer comprising a split ring-shaped body, said body having a non-circular cross section with opposite flat surfaces and including spaced ends, a plurality of protruding offset sections formed by said body with the body being substantially coplanar except for said offset sections, said offset sections serving to increase the effective thickness of said spacer, said body having an outer diametrical dimension approximating the outer diametrical dimension of said pipe whereby said body abuts one end of said pipe end and fitting shoulder at said offset sections when positioned between said fitting shoulder and pipe end, said offset sections being generally equal angularly spaced apart about said body and being compressively yieldable sufficiently to space said one pipe end or fitting shoulder from the remainder of said spacer to prevent unyielding abutment between the pipe and spacer upon pipe expansion during welding, and said body ends being spaced sufficiently to accommodate circumferential expansion of said body to prevent abutment of the body ends during said pipe expansion as said offset sections are yieldably compressed.

Claim 7

The spacer of claim 4 wherein there are three of said offset sections.

Claim 8

The spacer of claim 4 wherein the outer diameter exceeds the inner diametrical dimension of said pipe bore, said body being flexible to enable said body to be fitted in diametrical compression within the bore.