Large-Diameter Ceramic-Lined Pipe Transition for Cement Raw Meal Conveying in Indonesia

For this Indonesian cement project, the transition was used in a raw meal conveying line. The component had a large inlet, a smaller outlet, and a continuously changing internal profile.

That combination made the lining work very differently from a standard straight pipe.

Project Background

Cement raw meal is fine, but it is still abrasive when it moves continuously through a conveying system.

The wear problem becomes more obvious where the pipe diameter or flow direction changes.

Inside a transition, the powder does not always stay evenly distributed. Particles may move closer to one side of the pipe or repeatedly contact the tapered surface.

Once that happens, a relatively small area can wear much faster than the rest of the fitting.

The customer therefore required a wear-resistant lining for the complete internal surface rather than protecting only one local area.

The Steel Shape and Ceramic Lining Had to Be Considered Together

This was a non-standard component manufactured according to the project drawing.

Before ceramic installation, the inlet diameter, outlet diameter, transition profile, and finished internal size had to be checked together.

This point is important for a large transition.

If the steel shell is manufactured without considering the ceramic thickness, the final bore after lining may become smaller than expected.

For powder conveying equipment, this can affect the connection with adjacent pipework and may also change the flow area.

For this reason, the lining thickness was considered as part of the finished component rather than as an additional layer added after fabrication.

Why Ceramic Tiles Were Used

For regular straight pipe sections, ceramic sleeves can be a good solution.

This transition had a continuously changing diameter, so ceramic tiles were more practical.

The individual alumina ceramic tiles could be adjusted gradually as the circumference changed.

The lining was installed section by section, following the actual shape of the steel surface.

The goal was not to make every row look the same.

What mattered more was maintaining continuous ceramic coverage and keeping the internal surface as smooth as practical through the changing section.

Around the tapered area, tile cutting and joint arrangement required more attention than on a straight pipe.

This is usually where installation experience becomes important.

Paying Attention to the Material Flow Direction

For this type of fitting, knowing the flow direction is useful before the ceramic layout is finalized.

A transition working as a reducer does not experience the same material movement as the same component working in the opposite direction.

The position of the transition in the pipeline also matters.

If there is a bend or another fitting immediately upstream, the powder may already have an uneven velocity distribution before entering the transition.

That is why we prefer to review the complete drawing rather than only the dimensions of one component.

For existing conveying lines, photos of worn parts can also help identify where impact is concentrated.

Inspection Before Packing

After the ceramic lining was completed, the fitting was checked before shipment.

• The inspection focused on several practical points:
• ceramic coverage of the complete wear surface
• joint condition between adjacent ceramic tiles
• smooth transition through the changing diameter
• inlet and outlet condition
• finished internal passage
• external steel fabrication and coating
• connection position and orientation

For a large non-standard fitting, these details matter just as much as the ceramic material itself.

The component still needs to fit correctly into the customer's conveying line when it arrives on site.

Packing for Transport

Large ceramic-lined pipe fittings are heavier and more irregular than normal straight pipe sections.

Although alumina ceramic performs very well against abrasion during operation, unnecessary impact during loading and transport should still be avoided.

The finished components were therefore protected individually and secured for transportation.

For irregular pipe fittings, proper support is especially important because the weight is not always distributed evenly.

Why This Type of Transition Is Common in Cement Plants

Large ceramic-lined transitions are commonly considered in cement plants for areas handling:

• raw meal powder
• cement powder
• fly ash
• clinker dust
• mineral additives
• other abrasive dry bulk materials

The exact lining design should still depend on the actual conveying conditions.

Diameter, flow direction, particle characteristics, velocity, and the customer's required finished bore all influence the final solution.

For this Indonesian cement project, the important point was not simply adding a wear-resistant material inside the steel fitting.

The ceramic layout had to follow the changing geometry of the transition and remain suitable for the way the raw meal would actually pass through the pipe.

That is the difference between lining a pipe and designing wear protection for a conveying system.

For similar large-diameter or non-standard ceramic-lined pipe fittings, customers can send the drawing, dimensions and operating conditions to ELACERA for technical review.

Website: www.ybnceramic.com