Erosion-resistant inserts for flow equipment

1. A system for transporting corrosive or erosive fluids, the system comprising:

a flow conduit or flow equipment comprising at least two flow bores perpendicular to each other;

an insert disposed within each flow bore of the at least two flow bores, each insert comprising:

an internal structure; and

an erosion or corrosion resistant coating disposed around the internal structure,

wherein the internal structure axially extends from a first end surface at a first end of the insert to a distance away from a second end surface at a second end of the insert to form an unsupported end without the internal structure at the second end;

wherein each insert is disposed inside each flow bore of the at least two flow bores and provides erosion and/or corrosion resistance,

wherein the internal structure is entirely within each flow bore of the at least two flow bores.

2. The system of claim 1 , wherein the internal structure comprises a perforated metal, wire mesh, or glass coated nylon.

3. The system of claim 1 , wherein the erosion or corrosion resistant coating comprises a polymeric or rubber coating.

4. The system of claim 3 , wherein the polymeric or rubber coating comprises a polyurethane, an epoxy, or a polyurea.

5. The system of claim 1 , wherein the first end of each insert further comprise at least one of a lip, a tapered section, and a tab configured to mechanically engage the flow conduit, flow equipment or flow bore and align or restrain movement of the insert.

6. The system of claim 1 , wherein each insert further comprises a mechanical engagement, configured to fit into a corresponding feature of the flow conduit or flow equipment and to hold each insert in place during operation.

7. The system of claim 1 , comprising two or more inserts, wherein the inserts are configured to form a seal along one or more respective interfaces formed between the inserts.

8. The system of claim 7 , wherein the two or more inserts comprise complementary overlapping structures.

9. The system of claim 7 , wherein the flow equipment comprises a pup joint, a tee, a cross, or a y-splitter.

10. The system of claim 7 , wherein the flow equipment comprises a manifold comprising multiple inlets and/or multiple outlets and/or a primary flow channel.

11. The system of claim 1 , wherein the flow equipment comprises a valve, the valve including an inlet flow bore, an outlet flow bore, and a flow control member, wherein the system includes an insert disposed in each of the inlet flow bore and the outlet flow bore, and wherein the inserts are configured to form a dynamic seal with the flow control member.

12. An insert for providing corrosion and erosion resistance to flow equipment, the insert comprising:

an internal structural component that is sized to fit entirely within a flow bore of the flow equipment; and

an erosion-resistant coating disposed around the internal structural component,

wherein the internal structure axially extends from a first end surface at a first end of the insert to a distance away from a second end surface at a second end of the insert to form an unsupported end without the internal structure at the second end, and

wherein the unsupported end comprises a section configured to form a seal along one or more respective interfaces formed between the insert and a respective portion of a second complementary insert perpendicular to the insert.

13. The insert of claim 12 , wherein the first end of the insert comprises at least one of a lip, a tapered section, and a tab configured to mechanically engage the flow conduit, flow equipment or flow bore and align or restrain movement of the insert.

14. The insert of claim 12 , wherein the insert comprises an end section configured to form a dynamic seal with a moving component of a flow equipment.

15. The insert of claim 12 , further comprising a mechanical engagement configured to fit into a corresponding feature of the flow equipment and to hold the insert in place during operation.

16. The insert of claim 12 , wherein the internal structural component comprises:

an elongated tubular element that defines an axial bore which is open at both ends of the tubular element; and

a plurality of opening through the side of the elongated tubular element.

17. The insert of claim 16 , wherein the erosion-resistant coating is disposed within at least one of the plurality of openings through the side of the tubular element.