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Help CenterSteel Pipe & Tube & Cast Pipe，ZG40Cr25Ni20、ZG3Cr24Ni7SiN、Cr26、Cr27、ZG42CrMo
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Cast Pipe is an integrated tubular product formed by pouring molten metal. Centrifugal Cast Pipe is the mainstream high-end product in the market. By utilizing centrifugal force generated by high-speed rotation, Centrifugal Cast Pipe enables uniform crystallization of molten metal with dense microstructure and minimal defects such as pores and shrinkage cavities.Heat Resistant Cast Pipe is alloyed with chromium and nickel to adapt to continuous high-temperature working conditions. Wear Resistant Cast Pipe adopts optimized material hardness to resist erosion and abrasion. Different from hot-rolled and cold-drawn pipes, Centrifugal Cast Pipe can be manufactured with heavy wall thickness and special alloy grades. Heat Resistant Cast Pipe features outstanding thermal fatigue resistance and oxidation resistance. Wear Resistant Cast Pipe is widely used for powder and slurry transportation.All three types of pipes are integrally formed without welding seams, capable of withstanding complex conditions including high temperature, erosion and corrosion. They are indispensable special pipes for petrochemical, metallurgy, power plant and mining industries.
1. Product Classification
1.1 Classification by Casting Process
Centrifugal Cast Pipe: Preferred process with excellent forming quality. Most Heat Resistant Cast Pipe and Wear Resistant Cast Pipe are produced by this technology, featuring uniform wall thickness and fewer internal defects.
Sand Cast Pipe: Suitable for extra-large diameter and special-shaped pipe fittings, mainly applied in low-pressure general conditions.
1.2 Classification by Performance
Heat Resistant Cast Pipe: Made of high-temperature resistant alloy, used for heating furnaces, reformers and radiant pipelines. Heat Resistant Cast Pipe is the first choice for industrial high-temperature equipment.
Wear Resistant Cast Pipe: High chromium wear-resistant material for conveying coal powder, slag and ash. Wear Resistant Cast Pipe is widely adopted in powder transportation pipelines.
General carbon Centrifugal Cast Pipe: For structural support and medium-low temperature fluid transportation with favorable cost performance.
1.3 Classification by Material
Carbon cast steel pipe, alloy cast steel pipe, high chromium wear-resistant cast iron, nickel-chromium heat-resistant alloy steel. High-end Centrifugal Cast Pipe is mostly made of multi-element alloy materials.
2. Main Material Grades & Applicable Conditions
Domestic Grades
ZG45, LX345: General carbon Centrifugal Cast Pipe for structural parts and normal-temperature fluid pipelines.
ZG40Cr25Ni20, ZG3Cr24Ni7SiN: Popular material for Heat Resistant Cast Pipe, stably used under 800~1100℃. It is the preferred Heat Resistant Cast Pipe for reformer radiant tubes.
Cr26, Cr27 high chromium cast iron: Classic Wear Resistant Cast Pipe, excellent anti-erosion performance for coal powder transportation and slag discharge pipelines.
ZG42CrMo: Medium alloy Centrifugal Cast Pipe with balanced strength and toughness for heavy-duty mechanical pipelines.
Export International Grades
ASTM A426 Gr.1, A426 Gr.8, 1.4848, 1.4852. These grades can be customized into Centrifugal Cast Pipe and Heat Resistant Cast Pipe for overseas projects.
3. Executive Standards
✅ National StandardsJG/T 300 Cast Steel Pipe for Building StructureGB/T 8492 Heat Resistant Steel Castings
✅ International StandardsASTM A426/A426M, ISO 9001Custom production of Centrifugal Cast Pipe, Heat Resistant Cast Pipe, Wear Resistant Cast Pipe is available according to above standards.
4. Specification Parameters
Outer Diameter: 50mm–1200mmWall Thickness: 8mm–150mm. Centrifugal Cast Pipe has prominent advantages in heavy wall and extra-heavy wall specifications.Standard Length: 0.5m–6m. Custom cutting, beveling and flange welding service are supported.Dimensional Tolerance: OD tolerance ±2~±5mm; tolerance can be reduced after finish machining.Inner Surface: As-cast or boring machined. The as-cast dense layer of Wear Resistant Cast Pipe can be retained to extend service life. Heat Resistant Cast Pipe can be treated by sand blasting on demand.
5. Production Process Flow
Raw material batching & melting → Spectral composition test before pouring → Centrifugal casting (core procedure for Centrifugal Cast Pipe) → Cooling & demoulding → Heat treatment (annealing / normalizing; solution treatment required for Heat Resistant Cast Pipe) → Cutting & finishing → Grinding & cleaning → Dimensional inspection → NDT inspection → Finished product storage. Strict whole-process control ensures stable microstructure of each Centrifugal Cast Pipe and Wear Resistant Cast Pipe.
6. Core Performance Advantages
High forming flexibility: Centrifugal Cast Pipe can produce heavy-wall and large-diameter pipes, as well as high-alloy grades difficult to roll.
Excellent high temperature & thermal shock resistance: Nickel-chromium matrix of Heat Resistant Cast Pipe resists deformation and cracking under high temperature, stable under cyclic temperature.
Superior anti-abrasion performance: High hardness metallographic structure of Wear Resistant Cast Pipe withstands particle erosion, much longer service life than ordinary steel pipes.
Reliable pressure bearing: Integrally cast without weak welding seams, stable pressure resistance under hot working conditions.
Adjustable material composition: Content of C, Cr, Ni, Mo can be customized to meet requirements of heat resistance, wear resistance and corrosion resistance.
7. Application Fields
Petrochemical & Hydrogen Production: Reformer radiant tubes and high-temperature process pipelines, widely equipped with Heat Resistant Cast Pipe.
Thermal Power Plant: Coal powder pipelines and slag pipelines, mostly using Wear Resistant Cast Pipe.
Metallurgical Heat Treatment Furnace: Furnace roller sleeves and high-temperature flue pipes, matched with premium Centrifugal Cast Pipe.
Mining & Cement Industry: Slurry, clinker and fly ash transportation pipelines, Wear Resistant Cast Pipe serves as the main pipe material.
Waste Incineration & Coal Chemical Industry: High-temperature flue gas pipelines and waste heat system pipelines, combined configuration of Heat Resistant Cast Pipe and Centrifugal Cast Pipe.
8. Quality Inspection
Graded inspection standards are formulated for Centrifugal Cast Pipe, Heat Resistant Cast Pipe, Wear Resistant Cast Pipe: visual inspection, dimensional measurement, spectral analysis, hardness & tensile test, PT penetration inspection, UT ultrasonic inspection, hydrostatic test. Complete MTC certificate can be provided, supporting third-party inspection by SGS and BV. Random high-temperature performance test for Heat Resistant Cast Pipe, abrasion test optional for Wear Resistant Cast Pipe.
9. Packaging, Lead Time & Trade Information
Surface Treatment: Sand blasting, anti-rust coating; machining and polishing available.
Packing: Bundled with steel strips and pipe end protection. Export-grade Centrifugal Cast Pipe adopts moisture-proof package with wooden pallets for sea transportation.
Lead Time: Standard blank Centrifugal Cast Pipe:15–22 days; customized alloy Heat Resistant Cast Pipe and special Wear Resistant Cast Pipe:20–35 days.
Trade Terms: FOB, CIF, DAP available. MOQ: 1 ton; single-piece sample order negotiable. Complete customs documents can be supplied.
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