Ceramic Sleeve Lined Pipe & Manufacturing Logic

Ceramic sleeve lined pipe adopts split high-purity alumina ceramic sleeves as inner wear-resistant layer, matched with carbon steel outer pipe, and uses high-temperature inorganic adhesive to tightly bond ceramic and steel matrix. Compared with integral cast basalt pipe, split ceramic sleeve has better impact resistance and convenient replacement of local damaged sections. The whole production chain is divided into two major workshops: ceramic blank sintering workshop and steel pipe lining assembly workshop, with strict inspection set after each working procedure to eliminate unqualified semi-finished products in advance.

• Main raw materials: High alumina ceramic powder, seamless carbon steel pipe, inorganic high temperature resistant adhesive, sealing filler
• Core advantages of craft: Independent ceramic sleeve sintering, uniform density, low internal porosity, strong anti-abrasion performance
• Main applicable working conditions: Mining slurry, power plant ash slag, cement raw material, metallurgical slag conveying

Automatic assembly line for ceramic sleeve lined pipe

Whole production flow of alumina ceramic sleeve composite steel pipe

Complete Step-by-Step Production Flow (From Raw Material To Finished Goods)

Process No.	Working Procedure	Core Operation & Key Technical Parameters	In-Process Inspection Item
Step 1	Raw Material Incoming Inspection	1. Steel pipe: Check OD, wall thickness, straightness, surface rust; 2. Ceramic powder: Alumina content ≥92%; 3. Adhesive: High temperature resistance ≥350℃	Dimension measurement, chemical composition test of raw materials
Step 2	Ceramic Sleeve Forming & Green Body Pressing	High alumina powder + binder mixing, isostatic pressing to make split arc ceramic blanks; uniform blank thickness control	Blank size, surface crack visual inspection
Step 3	Ceramic High-Temperature Sintering	Sintering furnace temperature 1650℃, constant temperature holding 4-6h, slow cooling to room temperature	Ceramic hardness, density, crack detection
Step 4	Steel Pipe Inner Wall Pretreatment	Sand blasting to remove rust & oxide scale, clean inner wall with alcohol, dry completely	Rust residue inspection, surface roughness test
Step 5	Ceramic Sleeve Assembly Inside Pipe	Arrange split ceramic sleeves inside steel pipe, stagger vertical joints between adjacent layers	Sleeve gap ≤0.8mm, no dislocation
Step 6	Inject High-Temperature Adhesive	Fill gap between ceramic and steel pipe with inorganic adhesive, vibrate to discharge air bubbles	No hollow cavity inside bonding layer
Step 7	Constant Temperature Curing	Curing oven 120℃, heat preservation 3 hours for adhesive full solidification	Bonding strength sampling test
Step 8	Pipe End Finishing & Sealing	Grind flat pipe ends, fill end gaps with wear-resistant sealant	Smooth end face, no exposed steel edge
Step 9	Full Performance Inspection	Hydrostatic test, drop impact test, bonding peel test, visual full inspection	No liner shedding, no leakage, no crack
Step 10	Anti-Corrosion Coating & Packing	Outer steel pipe spray primer, install plastic end caps, bind and stack finished products	Complete surface protection, clear product marking

Key Quality Control Points In Production Process

1 Ceramic Sintering Control

Sintering temperature must reach 1650℃; insufficient heat reduces hardness and wear life.
Controlled cooling prevents internal microcracks within ceramic sleeves.
Any single ceramic blank with visible cracks is rejected before assembly.

2 Adhesive Bonding Control

Steel pipe inner wall must be completely dry before adhesive injection to avoid voids.
Vibration exhaust treatment eliminates air pockets after adhesive filling.
Curing temperature and holding time must not be shortened arbitrarily.

3 Assembly & Finishing Control

Vertical joints between upper and lower ceramic layers must be staggered to prevent straight-through wear.
Pipe-end sealing filler protects the bonding layer from slurry erosion during operation.
Finished pipes shall not be hoisted by steel wire to avoid ceramic collision and cracking.

Finished Pipe Mandatory Performance Test Standards

1. Hydrostatic Pressure Test: 1.5 times design pressure, hold pressure 15min, no leakage, liner no separation
2. Drop Impact Test: 5kg steel ball free fall 1m, ceramic sleeve no large area peeling
3. Bonding Strength Test: Pull force ≥6MPa, ceramic layer will not separate from steel pipe
4. Wear Resistance Test: Wear loss far lower than carbon steel and cast basalt pipe
5. High Temperature Resistance Test: Long-term stable working below 350℃ without glue failure

All test data will be recorded in MTC material test report and delivered together with goods.

Advantages Of This Production Technology

Stable Wear Resistance

High-alumina ceramic formed by high-temperature sintering delivers exceptional hardness. Service life reaches 8–10× that of carbon steel, making it ideal for abrasive slurry pipelines.

Strong Temperature Adaptability

Inorganic adhesive systems resist continuous service temperatures up to 350℃. Suitable for hot ash handling and high-temperature mineral slurry pipelines.

Convenient Maintenance

Damaged ceramic sleeves can be replaced individually without cutting the entire pipe section. This modular approach significantly reduces maintenance downtime and labor cost.

Comprehensive Cost Saving

Extended service cycles lower the frequency of pipeline replacement. Reduced downtime and maintenance efforts translate into measurable savings in total project OPEX.

Main Application Industries For Ceramic Sleeve Lined Pipe

Thermal Power Plant

Industry Field	Pipeline Medium
Coal & Metal Mining	Mineral slurry, tailings waste residue conveying pipeline
Boiler fly ash, bottom slag slurry discharge pipe
Cement Plant	Raw material powder, clinker conveying pipeline
Metallurgical Factory	High-temperature furnace slag, ore slurry pipeline
Municipal Solid Waste Incineration	High abrasion flue ash conveying pipeline