Stationary pipeline support
The disclosure relates to a saddle support for use in above-ground pipeline construction in severe geological conditions, such as permafrost. The support provides structural stability and redistribution of a load from a pipeline to a pile foundation. The saddle support includes the spool coupled to four adjustable stands through electric insulating units. The stands can be adjusted to change a height and slope angle of the support and are fastened to a single-level pilework that supported by the pile foundation via flanges. The spool is a pipe having an external case and a heat-insulating layer. Longitudinal ribs are fastened to the spool to fasten the spool to the stands. The load-bearing structure of the spool resists axial and side movements of the pipeline and transfer the load absorbed by the spool to the pilework foundation via the electric insulating units on the adjustable stands.
1. A saddle support comprising:
a spool configured to be coupled to a pipeline and having an internal shell pressed around and integrated to a section of the pipeline by circular seam welds at each end thereof;
a heat-insulating layer around the internal shell;
an external case around the heat-insulating layer;
a single-level pilework coupled to a pile foundation;
a pair of at least two adjustable stands each having at least one supporting flange coupled to the single-level pilework and having an adjustable height;
stiffeners each comprising a longitudinal rib attached to a lower part of the internal shell of the spool and extending out from the external case, each longitudinal rib further attached to and spanning between the at least two adjustable stands of the each pair, thereby fastening the internal shell of the spool to the at least two adjustable stands; and
electric insulating units positioned between the at least two adjustable stands and the spool and configured to electrically isolate the spool from the pile foundation.
2. The saddle support of claim 1 , further comprising metal ring flanges welded around an exterior of the internal shell near butts of the internal shell.
3. The saddle support of claim 1 , wherein the internal shell is made of one milled sheet of metal.
4. The saddle support of claim 1 , wherein the spool includes additional segmented stiffeners linking the longitudinal ribs.
5. The saddle support of claim 4 , wherein the segmented stiffeners are fastened to the longitudinal ribs under the internal shell along its radius.
6. The saddle support of claim 1 , wherein the heat-insulating layer of the spool includes non-combustible cellular glass.
7. The saddle support of claim 1 , wherein the electric insulating units each include a holder for receiving a bolt coupled to the each longitudinal rib of the spool.
8. The saddle support of claim 1 , wherein the electric insulating units include a dielectric pad positioned between the spool and the pair of at least two adjustable stands.
9. The saddle support of claim 1 , wherein the single-level pilework is configured to be hingelessly supported by the pile foundation via:
supporting plates positioned under the single-level pilework, having a hole for receiving the pile foundation, being fastened to the pile foundation, and strengthened by vertical gussets, and
at least two fixtures each in the form of a thickened plate embracing a pile fastened to the single-level pilework and to the pile foundation via a welded joint.
10. The saddle support of claim 1 , further comprising supporting plates fastened to the pile foundation and tightly fastened to the pilework.
11. The saddle support of claim 1 , wherein the spool is installed along an axis of the pipeline and set to have a slope that corresponds to a surface of the single-level pilework.
12. The saddle support of claim 1 , wherein the pair of at least two adjustable stands are tightly fastened to the single-level pilework via supporting flanges and the adaptable height allows the spool to be set to a desirable height and slope angle during assembly.
13. The saddle support of claim 1 , wherein the each longitudinal rib is attached to each of the at least two adjustable stands of the each pair by a hinged bolt joint at each of the stands.
14. The saddle support of claim 1 , wherein the external case is positioned around the heat insulating layer and resists penetration of moisture into the spool.
15. The saddle support of claim 1 , wherein the external case is made of galvanized steel.
16. The saddle support of claim 1 , wherein the each longitudinal rib comprises a rectangular metal sheet having holes along its length for fastening to the spool.