Superior Abrasion Protection
Comprehensive basalt-lined pipeline solutions with seamless steel integration—perfect for industrial systems needing extreme wear, heat, and corrosion resistance.
Superior Abrasion Protection
Comprehensive basalt-lined pipeline solutions with seamless steel integration—perfect for industrial systems needing extreme wear, heat, and corrosion resistance.
Cast basalt lined pipes and fittings deliver unmatched abrasion, corrosion, and heat protection through thermally bonded basalt—ideal for slurry, ash, and chemical systems.
Sunny Steel’s cast basalt lined pipes and fittings combine heavy-duty carbon steel shells with precision-cast basalt interiors, delivering turnkey pipeline solutions for the most demanding industrial applications. This comprehensive range includes straight pipes, elbows, tees, Y‑junctions, reducers, custom bends, and special fittings, all featuring seamless cast basalt linings.
The basalt liner is made from natural volcanic rock, melted and cast directly onto the steel substrate—resulting in a continuous, fracture-resistant inner layer with Mohs hardness of 7–8, exceptional compressive strength, and excellent resistance to abrasion, corrosion, and high temperatures. These properties make the fittings ideal for conveying abrasive slurries, fly ash, cement, mining tailings, chemical effluents, and other aggressive substances.
Each component—whether pipe or fitting—is engineered for a robust bond between steel and basalt, preventing delamination even under thermal cycling and turbulence. The smooth interior surface minimizes friction, improves flow efficiency, and reduces buildup over long operating periods.
Available in standard and customized sizes (DN50–DN1600+), connection types include flanged, butt-weld, socket, or threaded joints to suit installation requirements and pressure ratings. Sunny Steel’s basalt-lined solutions are built to international standards (ASTM, DIN, ISO) and undergo strict quality procedures, including dimensional verification, non-destructive weld testing, basalt thickness control, and pressure validation.
By integrating Sunny Steel’s complete line of basalt-lined pipes and fittings, industrial operators benefit from extended service life—often 5–10× longer than traditional steel offerings—alongside reduced downtime and lower total cost of ownership. Our solutions address fragmentation, erosion, corrosion, and thermal stress in plants spanning power generation, mining, cement, chemical processing, pulp & paper, and wastewater treatment.
Supported by in-house engineering, customizable design services, and project-oriented delivery, Sunny Steel’s cast basalt lined pipes and fittings offer a high-performance turnkey package for demanding pipeline systems.
The excellent performance of cast basalt lined steel pipe is that it sets tenacity of steel pipe, abrasive resistance of cast basalt pipe, concreteness of cement mortar in one.
This greatly improves the products adaptive capacity in complicated operation conditions. At the same time. cement mortar is selected as the filling material and this can make the inside surface of steel pipe in alkali mediums. So the surface of steel pipe generates purifying films. These films can prevent being rusted.
Cast basalt lined steel pipe is made with lined cast basalt pipes, coat steel pipe and the cement mortar filling between the two layers, it sets the wear resistance and corrosion resistance of cast stone pipe, the toughness of the steel pipe and the consolidation of the cement mortar in one. Greatly improve the product's ability of adapting various complicated working condition. At the same time using cement mortar as filling material, can make the pipe inner surface in alkaline medium, so that the surface of the steel pipe will produce a purified film to prevent corrosion. Cast basalt lined steel pipe is not only resistant to wear and corrosion, against high pressure, but also convenient and safe to transport.
The nominal diameter series of cast basalt lined steel elbow pipe is the same as the cast basalt lined steel straight pipe , the turning radius and central Angle can be made according to the requirements of customers.
The technical parameters of the coat steel of cast basalt lined steel pipe according to the operating pressure of the pipeline system to determine.
| Cast Basalt Pipe DN (mm) |
Standard Steel Pipe OD (mm) |
Cast Basalt Thickness (mm) |
Length (mm) |
|---|---|---|---|
| 80 | 159 | 25 | 4000 |
| 100 | 168 | 17.5 20 |
4000 6000 8000 |
| 125 | 195 | ||
| 150 | 219 | ||
| 175 | 245 | 6000 8000 10000 12000 |
|
| 200 | 273 | ||
| 225 | 300 | ||
| 250 | 325 | ||
| 275 | 345 | ||
| 300 | 377 | ||
| 350 | 426 | ||
| 400 | 478 | 20 25 |
|
| 450 | 529 | ||
| 500 | 600 | 25 | |
| 550 | 650 | ||
| 600 | 720 | 30 | 6000 |
| 650 | 770 | ||
| 700 | 820 | ||
| 750 | 870 | ||
| 800 | 920 |
Other specifications of cast steel pipe lined with basalt can be manufactured according to customer technical requirements. Suitable for large-diameter basalt lining steel pipes with a nominal diameter greater than 800mm. Generally, according to the running status of the pipeline, different cement is used to fix the basalt brick inside the finished steel pipe to complete the basalt lining steel pipe. Its advantages are good wear resistance, wide range of use, basically not limited by the size of the pipeline and low cost of pipeline installation.
Cast basalt is a volcanic mineral material known for its exceptional abrasion resistance, complete impermeability to moisture, high compressive strength, and resistance to most acids and alkalis. It is entirely corrosion-proof, making it ideal for harsh industrial environments.
It is produced by melting selected natural basalt, crushed into 20–50 mm fragments, in shaft furnaces at approximately 1,300°C. The molten basalt is then cast and crystallizes into a uniform phaneritic structure, resulting in excellent hardness and wear resistance.
Cast basalt has a minimum hardness of 8 on the Mohs scale (diamonds are rated 10), making it extremely effective for abrasion and erosion protection.
Like other ceramics, it is sensitive to impact. Under normal service conditions, cast basalt withstands temperatures from -40°C to +350°C, but it should not be subjected to thermal shock.
Sizes: Cast basalt products come in the form of tiles, formed pieces, and segments. Straight pipes are spun-cast with nominal bores from 32 to 600 mm, wall thickness 20–30 mm, and standard lengths of 500 mm. Smaller bores, pipe segments with radii of 40–3000 mm, and special formed pieces are usually sand-cast. Steel molds can be used for higher volumes, producing 30–40 mm thick linings.
Cast basalt-lined pipes are widely used in abrasive and ash handling systems such as chutes, troughs, funnels, silos, dust collectors, rotary flow machines, conveyors, and feeders. In chemical plants, they can be used to line pickling tanks or store corrosive substances.
Customized specifications and shapes are available to meet specific project requirements.
Refined into a finely crystallized glass ceramic, Sunny Steel’s cast basalt linings offer extremely durable protection for static plants handling large volumes of abrasive or corrosive media.
Available in both pipe and tile form, cast basalt is ideal for wet material handling systems with lower impacts, such as coal chutes, ash sluiceways, and pipelines at power stations. It provides excellent resistance to wear, corrosion, and temperatures up to ~400°C.
Our factory is equipped with professional technical research and design personnel who can provide product optimization design and services.
S6 JAGUAR Wavelength Dispersive X-ray Fluorescence Spectrometer
Pendulum Friction Coefficient Tester
XJJ-50 Single Beam Impact Testing Machine
HV-5 Vickers Hardness Tester
CMT-100 Microcomputer Controlled Electronic Universal Testing Machine
MSY-A Friction and Wear Testing Machine
Manufacturing Process
Cast basalt is a silicate crystalline material manufactured through a high-temperature refining process. It is produced using natural igneous rocks such as basalt, diabase, or selected industrial waste slag as the primary raw material.
These materials undergo melting, casting, controlled crystallization, and annealing, resulting in a dense, highly wear- and corrosion-resistant product.
A cast basalt lined pipe typically consists of three layers:
Cast basalt ceramic for abrasion and corrosion resistance
Steel pipe for structural strength
Cement mortar for bonding and chemical passivation
Composite Benefits: This composite structure ensures high durability, pressure resistance, and corrosion protection.
The cement mortar creates an alkaline environment on the inner steel surface, forming a passive protective film that prevents corrosion. Overall, the cast basalt lined pipe is ideal for transporting abrasive or corrosive media in complex operating conditions.
Elbows are designed with turning radii and center angles based on user requirements and share the same diameter series as straight pipes.
Cast basalt can be used for the lining of pipework, chutes, bunkers, cyclones, and hoppers.
It has become the global standard in areas such as ash slurry pipework, often used at fossil-fuel power stations. It is an all-round cost-effective and adaptable lining material that extends the life of equipment in pipe or tile form where affected by erosion.
Cast basalt is well-proven in a variety of industries as a cost-effective, long-lasting lining material used to extend the operating life of equipment manufactured or lined with lower-wearing materials such as steel, cast iron, rubber, and polyurethane.
Cast basalt lined steel pipe, as both a wear-resistant and corrosion-resistant material, has proven effective over 30+ years of practical use.
It is also widely used in cement plants for components such as air separators, chain conveyors, hoppers, nozzles, ducts, chutes, and more.
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