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Help CenterSteel Pipe & Tube & Cast Steel Pipe，ZG270-500、ZG310-570、SCW490‑CF、ZG15CrMo、ZG12Cr1MoV、SCPH21/32‑CF
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Cast Steel Pipe – Detailed Product Description
1. Product Definition
Centrifugal cast steel pipe is formed by pouring molten steel into a rotating mould under centrifugal force. It features dense metallurgical structure, weldless integrity, and can be integrally formed into complex structural parts. It is specially suitable for thick-wall, large-diameter, high-temperature, high-pressure and anti-corrosion working conditions.
2. Production Process (Centrifugal Casting)
Melting & Batching: Raw steel scrap, chromium, nickel, molybdenum and other alloy elements are proportioned and melted in an electric furnace at 1500–1600℃.
Centrifugal Pouring (Core Process): The mould rotates at high speed of 500–1500 rpm; molten steel is poured evenly and adheres closely to the mould wall under centrifugal force. Solidification proceeds from outside to inside, with air bubbles and inclusions gathered inward and removed effectively.
Heat Treatment: Normalizing, annealing, normalizing & tempering, or solution aging treatment to eliminate internal stress, refine grain structure, and improve high-temperature strength and creep resistance.
Post Processing: Fixed-length cutting, shot blasting & surface cleaning, non-destructive testing (UT/MT/RT), internal & external precision turning, and anti-rust & anti-corrosion treatment.
3. Common Materials & Grades
Carbon Steel / Low Alloy Steel: ZG270-500, ZG310-570, SCW490-CFApplication: Construction, low-pressure fluid delivery, structural support.
Chromium-Molybdenum Heat-Resistant Steel: ZG15CrMo, ZG12Cr1MoV, SCPH21/32-CFApplication: Boiler and steam pipeline service at 500–600℃.
High Nickel-Chromium Austenitic Heat-Resistant Steel: ZG40Cr25Ni20Si2, ZG8Cr26Ni4Mn3NRe, HK40, HP40-NbApplication: Petrochemical cracking furnace, heating furnace tube under 850–1100℃ long-term service.
4. Size & Specifications (Custom Available)
Outer Diameter: DN50–DN2000 (φ60–φ2020 mm)
Wall Thickness: 10–100 mm (excellent for thick-wall production)
Length: 1000–6000 mm (fixed or random length)
Executive Standards: JG/T 300-2011, ASTM A608, GB/T 16265
5. Core Performance
Mechanical Properties (Ambient Temperature)Carbon Steel: Tensile Strength 450–570 MPa, Yield Strength ≥270 MPa, Elongation 18%–22%.High Alloy Heat-Resistant Steel: Tensile Strength ≥400 MPa, Yield Strength ≥200 MPa, maintaining stable strength at 600–1000℃.
High-Temperature PerformanceExcellent creep resistance, thermal shock resistance, high-temperature oxidation resistance, sulfidation and carburization corrosion resistance.
Structural FeaturesWeldless design, dense grain, uniform chemical composition; flanges, reducers, elbows, radiant tubes and other complex parts can be integrally formed.
6. Main Application Fields
Petrochemical Industry: Ethylene cracking furnace tubes, reformer furnace tubes, heating furnace radiant/convection tubes, high-temperature heat exchangers and header manifolds.
Metallurgy & Heat Treatment: Continuous annealing furnace radiant tubes, furnace rollers, bell furnace components and heat treatment fixtures.
Power & Energy: Boiler superheater & reheater tubes, waste incinerator parts and gas turbine components.
Building Structure: Large-span steel structure columns, trusses and supporting members.
Other Fields: High-pressure cylinder blocks, hydraulic support pillars, mining roller parts, glass kiln components, marine and offshore platform pressure-resistant pipes.
7. Product Advantages
Integral Structure: Weldless design avoids welding defects with high safety factor.
Super Thick-Wall Capacity: Wall thickness over 100 mm available, maximum bearing pressure up to 30 MPa.
Long High-Temperature Service Life: High nickel-chromium grade can serve steadily above 1000℃, with service life 2–3 times that of conventional seamless steel pipes.
Flexible Customization: Integral forming of complex inner cavity, flange and reducing structure, reducing subsequent machining and welding procedures.
Cost-Effective: High mass production efficiency; lower cost than forged parts and welded seamless pipes for complex structures.
8. Quality Inspection
Chemical composition: Spectral analysis before furnace & finished product re-inspection.
Mechanical test: Tensile test, impact test and hardness test (HB/HRC).
Non-destructive testing: Ultrasonic Testing (UT), Magnetic Particle Testing (MT), Radiographic Testing (RT).
Dimensional inspection: Outer diameter, wall thickness, ovality, total length and end face verticality.
Surface quality: Free from cracks, air holes, slag inclusions and sand sticking defects.
9. Packaging & Delivery
Packaging: Pipe ends sealed, wrapped with anti-rust film, bundled with steel strips or packed in wooden cases.
Delivery Time: 7–15 working days for standard specifications.
Quality Documents: Material certificate, heat batch report, NDT report and dimensional inspection record.
10. Executive Standards
China: JG/T 300-2011, GB/T 16265, GB/T 11352
USA: ASTM A608, ASME SA608
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