Tube Plates and Boiler Components

A tubeplate is a component of a heat exchange. Typically there is two tubeplates connected by tubes and fitted in a sealed vessel. Fluid in the vessel passes energy to the fluid in the tubes without any contact between the two fluids.

There is a number of techniques used to seal the tubes to the tubeplates. The illustration shows a tubeplate machined ready to have tubes expanded into it.

Typically a heat exchange will have baffles between the tubeplates. These baffles are drilled to the same pattern as the tubeplate and serve to stabilise the tubes and direct fluid flow around the tubes.

Tubeplate Standards

As tubeplates are built to a custom design there is no standard that defines the tubeplate dimensions generally. However there is a a standard that describes the tubeholes.

Tube Plates and Bonnets

Bonnets fit on the tubeplate and are used to control fluid flow through the tubes.

Balcombe Engineering manufactures tubeplates and other boiler components up to two meters in diameter.

Pressure Vessel Components

Injection nozzles

These are bolted into a vessel to inject material into the process away from the vessel walls

Self Reinforced Weldnecks

These weldnecks are manufactured to match the radius of the vessel and are then welded in. Their shape helps reinforce the vessel where the hole has been cut. Typically the bolting holes and the sealing face will match to ASME B16.5.

Long Weldnecks

The dimensions of long weldnecks are described in ASME B16.5 but the length through bore can be altered to meet specific requirements. Used for ports in pressure vessels.

Tubeplate Sealing Face

Typically, tube plates have clearly defined sealing surfaces. Sometimes it will be a spiral sealing face and other times in the case of a floating tubeplate an o-ring seal.

Additionally specialist finishes are available such as galvanising, PTFE coatings and linings and various epoxy finishes

Tubeplate and Baffle Materials

As an Australian manufacturer Balcombe Engineering are able to manufacture the tubeplate and baffles in a material with the testing as required by the client specification. Typically, tubeplates will be manufactured from forged carbon or stainless steels. Typical carbon steel materials are forgings like A105, A350 LF2, A350 LF3 and forged stainless materials. Baffles are usually made from plate materials like mild steel or A240-316L. Less common but easily supplied is Super Duplex 2205 and Incoloy 625.

Corrosion Protection and Packaging

A tube plate may have multiple sealing faces and requires significant sealing face protection.

Whether you want the tube plate protected for 2 weeks or 2 years Balcombe Engineering have a packing system that ensures that the tube plates and baffles arrive at the installation in good condition.

Even more robust corrosion protection can be supplied upon request.

Special Tubeplates

Every tubeplate is specifically designed for a particular pressure vessel and performance. Some have multiple grooves, various slots, unusual holes sizes, different bolting patterns and a range of special materials. Balcombe Engineering are a manufacturer with full ISO 9001 certification and are able to produce to your requirements including detailed testing and documentation. All material is traced through the system and ITP’s and MDR’s are available on request. Your tubeplates, baffles and pressure vessel components can be packaged according to your engineering or project specification and all this can be done with remarkably short delivery times.

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