FIELD OF THE INVENTION
The present invention relates to a process for removing eccentricity in stubs or
radial arm co-ordinates to align floating Collectors concentrically to contain within
a radial gap configured in a compact cylinder.
BACKGROUND OF THE INVENTION
Collectors with inlets and outlets form part of flow path of a equipment and
multiple Collectors are used to divide the flow path. Collectors are housed in
compact containment cylinder wherein radial clearance between the Collectors
and the Containment cylinder is very small which limits eccentricity of the
Collectors to less than 0.05 mm.
Collectors consists of a plurality of circular headers or spherical heads welded 90
degree apart with a corresponding number of floating or stable straight stubs or
radial arms. Welding of the stubs or radial arms with the circular headers or
spherical heads involve welding distortions wherein radial and angular positions
of the Stubs or radial arms, are difficult to control.
Deviations in co-ordinates of the stubs or radial arms of the multiple collectors
are therefore required to be brought within 0.05 mm.

OBJECTS OF THE INVENTION
It is therefore an object of the invention to propose a process for removing
eccentricity in stubs or radial arm co-ordinates to align floating Collectors
concentrically to contain within a radial gap configured in a compact cylinder.
Another object of the invention is to propose a method of doing sequence of
operations in removing the eccentricity in stubs or radial arm co-ordinates and
align the floating Collectors concentrically to contain in the compact cylinder with
in the very small designed radial gap.
SUMMARY OF THE INVENTION
According to the invention, there is provided a process for removing eccentricity
in stubs or radial arm co-ordinates to align floating Collectors concentrically to
contain within a radial gap configured in a compact cylinder; comprising the
steps of:
mounting a plurality of floating collectors having multiple alignment nodes
a telescopically in supporting structure;
locating the alignment nodes of the collectors, and assembling a plurality
of eccentric eliminator at the alignment nodes for integrating inlets of the
collectors or outlets of the stubs or radial arms; setting eccentricity
correction in the eccentricity eliminators; match marking eccentricity
orientations;
dismantling the collectors from the supporting structure;

re-mounting and re-machining of the alignment nodes of the collectors to
concentricity using the eccentricity eliminators; re-assembling the floating
multiple collectors concentrically;
performing material deposition; and connecting the alignment nodes to
match the designed dimensional concentricity of the collector assembly.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 schematically illustrates the process according to the invention.
DETAILED DERSCRIPTION OF THE PREFERRED EMBODIMENTS
As shown in figure 1, the floating collectors with inlets and outlets of stubs or
radial arms (items 01 to 04 ) having variable angular and linear positions. The
floating multiple collectors (item 01 to 04) are mounted on support structure
(item-06). During the use of an equipment in which the inlets and outlets of the
collectors undergo stub or radial arm co-ordinate deviations. Identification of the
locations, where the deviations occur are the alignment nodes. A plurality of
eccentricity eliminators (5) are inserted at the stub or radial arm ends (item-01
to item-04). The eccentricity correction is set in the eccentricity eliminator (5).
The collectors are dismounted and alignment node is machined to remove the
eccentricity in the stub or radial arm of the collectors (item 01 to item-04). The
floating collectors are repositioned telescopically on the support structure (item -
06). All the alignment nodes of the stubs or arms of the collectors with weld
deposition are connected with corrected concentricity.

Floating collectors (01 to 04) are of high strength material, the first Collector
(01) has long pipe with four radial arms at one end with PCD 385 mm, The
second and the third collectors are circular pipes with stubs having PCD 385 mm
and integrated with slender tubes and joints. The fourth collector has dish head
with four arms of PCD 385 mm which moves radially and angurally during
fabrication.
High amount of distortion is added on the floating collectors with respect to the
inlets and outlets of the stubs or radial arms during manufacturing. Thus, the co-
ordinate deviations of the stubs or radial arms of the collectors are unavoidable.
If the deviation is not eliminated , a concentric alignment can not be achieved.

WE CLAIM :
1. A process for removing eccentricity in stubs or radial arm co-ordinates to
align floating Collectors concentrically to contain within a radial gap
configured in a compact cylinder, comprising the steps of :-
mounting a plurality of floating collectors having multiple alignment nodes
a telescopically in supporting structure;
locating the alignment nodes of the collectors, and assembling a plurality
of eccentric eliminator at the alignment nodes for integrating inlets of the
collectors or outlets of the stubs or radial arms; setting eccentricity
correction in the eccentricity eliminators; match marking eccentricity
orientations;
dismantling the collectors from the supporting structure;
re-mounting and re-machining of the alignment nodes of the collectors to
concentricity using the eccentricity eliminators; re-assembling the floating
multiple collectors concentrically;
performing material deposition; and connecting the alignment nodes to
match the designed dimensional concentricity of the collector assembly.
2. The process as claimed in claim 1, wherein the floating collectors with
inlets and outlets of stubs or radial arms having variable angular and
linear positions.
3. The process as claimed in claim 1, wherein the floating collectors after
removing the detected eccentricity in the stub or radial arm are
repositioned telescopically on the support structure.

4. The process as claimed in any of the preceding claims, wherein the
collectors are formed of high strength material, wherein the first collector
has a long pipe with four radial arms at one end, wherein the second and
third collectors are circular pipes with stubs and integrated with tubes and
joints, wherein the fourth collector has dish head with four arms moving
radially and angularly during fabrication, and wherein the radial arms and
the stubs are all having a PCD of 385 mm.
5. The design of eccentricity eliminator (item-05) as claimed in claim 1,
which provides facility to carryout correction of existing eccentricity of
stubs and arms of floating collectors.