Abstract A slip-on flange is provided for use in special piping systems such as those handling corrosive agents. The novel slip-on flange is made by forming a conventional flange having an opening therein through which the piping may extend. A recess is formed in the face of the flange surrounding the opening. The recess is then filled with stainless steel or other non-corrosive material fusible with the flange material. The filler material is applied, as by clad welding, so that it extends beyond the face of the flange. The filler material is then machined to produce a joint surface that is raised with respect to the original flange surface. An integral stub may be formed by a similar process wherein the pipe stub is inserted through the opening in the flange before the filler material is applied. After the filler material is applied, the filler material and the end of the pipe are machined in one operation to form a raised joint surface.
The combination comprising: a carbon steel flange body having a smooth walled cylindrical opening therein through which a first pipe to be joined may be extended; said body having an annular recess in the radial end face surrounding said opening; and, an integral annular weld of non-corrosive metal deposited in an integral with said flange body at the surface of said recess to fill said recess and to extend axially beyond said face, said integral weld having an annular radial machined, smooth, pipe joint surface that is raised with respect to said face and a machined, smooth cylindrical bore extending therethrough which is coaxial with said opening for receiving said first pipe to be joined.
Claim 2
Dependent Claim
115 words
The combination comprising: a carbon steel flange body having a smooth walled cylindrical opening therein through which a first pipe to be joined may be extended; said body having an annular recess in the radial end face surrounding said opening; and, an integral annular weld of non-corrosive metal deposited in an integral with said flange body at the surface of said recess to fill said recess and to extend axially beyond said face, said integral weld having an annular radial machined, smooth, pipe joint surface that is raised with respect to said face and a machined, smooth cylindrical bore extending therethrough which is coaxial with said opening for receiving said first pipe to be joined.
Claim 3
Dependent Claim
14 words
The combination as claimed in claim 1 wherein said integral weld comprises stainless steel.
Claim 4
Dependent Claim
44 words
The combination as claimed in claim 1 and further comprising a stainless steel pipe extending through said opening and terminating at the outermost extent of said weld, whereby the end of said pipe and weld are integrally joined and form said raised joint surface.
Claim 5
Dependent Claim
14 words
The combination as claimed in claim 3 wherein said integral weld comprises stainless steel.