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Help CenterSteel Pipe & Tube & Cast Pipe，HT200、HT250、HT300、QT400-18、QT450-10、QT500-7、QT600-3、ZG230-450、ZG270-500、ZG310-570
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1. Product Overview
Cast pipes are metal pipes formed by molten steel/iron casting process. Molten metal is poured into customized casting molds, cooled and solidified to form integral tubular workpieces. They feature thick wall, high structural rigidity, strong pressure bearing capacity and excellent wear & corrosion resistance. Different from seamless rolled tubes, cast pipes can be manufactured with complex integrated structures such as flanges, bosses and branch pipes in one-piece casting, widely used for heavy-duty, high-pressure and corrosive medium transportation projects.
2. Core Product Advantages
One-piece Integral FormingComplex structures like flanges, tee branches, valve seats and thickened sections can be cast integrally without secondary welding, effectively eliminating welding leakage risks and improving overall structural strength.
Extra High Wall Thickness & Load CapacityWall thickness can be customized in a wide range; dense casting structure with few internal pores, outstanding resistance to high pressure, heavy impact and abrasive media scouring.
Strong Wear & Corrosion ResistanceAdjustable alloy composition improves anti-rust, acid and alkali resistance; suitable for slurry, sewage, mineral powder and chemical fluid conveying working conditions.
Flexible Structure CustomizationUnlimited irregular pipe shapes, bent pipes, reducing pipes and multi-way split pipes can be produced according to customer drawings, hard to realize by rolling & cold drawing tubes.
Stable High-Temperature PerformanceMaintain stable mechanical strength under high temperature environment, applicable to high-temperature flue, boiler circulation and thermal medium pipelines.
3. Main Executive Standards (Domestic & International Export Standards)
Domestic Standards
GB/T 1348 Spheroidal Graphite Cast Iron
GB/T 8263 Centrifugal Casting Pipe
GB/T 11352 Carbon Steel Castings for General Engineering
GB/T 9439 Grey Cast Iron Castings
International Export Standards
ASTM A48 Standard Specification for Gray Iron Castings
ASTM A536 Standard Specification for Ductile Iron Castings
ISO 1083 Spheroidal Graphite Cast Iron
EN 10293 Steel Castings for General Uses
4. Common Material Grades (Cast Iron & Cast Steel, Customizable Alloy)
Grey Cast Iron Pipes (Low pressure, sewage, civil pipeline)
HT200, HT250, HT300
Ductile Iron Cast Pipes (High pressure water supply, municipal engineering)
QT400-18, QT450-10, QT500-7, QT600-3
Carbon Cast Steel Pipes (High pressure, machinery, fluid pipeline)
ZG230-450, ZG270-500, ZG310-570
Alloy Cast Steel Pipes (Wear-resistant, corrosion-resistant, high temperature)
ZG40Cr, ZG35CrMo, High Chromium Wear-resistant Cast Steel, Stainless Cast Steel CF8, CF8M
Anti-corrosion Special Casting
High Silicon Cast Iron, High Nickel Corrosion-resistant Alloy Cast Pipe
5. Specification Range
Nominal Diameter DN: DN25 – DN2000
Wall Thickness WT: 6mm – 100mm (custom ultra-thick wall available)
Length: 0.3m – 6m fixed length; customized bent pipe, tee, elbow, reducing pipe fittings
Connection Forms: Flange connection, socket spigot connection, butt welding end, thread end
Surface Treatment: Shot blasting, anti-rust primer, asphalt coating, epoxy anti-corrosion coating, galvanizing
6. Complete Production Process
Raw material smelting & component adjustment → Mold making / sand mold / centrifugal casting mold assembly → Molten metal pouring → Natural cooling & solidification → Shakeout & mold removal → Riser cutting, grinding & polishing → Heat treatment (annealing / normalizing / tempering) → Shot blasting surface cleaning → Defect inspection & repair → Dimension recheck → Anti-corrosion coating processing → Marking, packaging & delivery
Main Casting Molding Processes
Sand Casting: Low cost, suitable for complex irregular casting pipes and pipe fittings
Centrifugal Casting: Denser pipe wall, fewer internal defects, high dimensional accuracy, ideal for straight cast pipes
Investment Casting: Ultra-smooth surface, high precision, small-size precision cast pipe fittings
7. Heat Treatment Delivery States
Annealing: Eliminate casting internal stress, improve toughness, reduce machining difficulty
Normalizing: Uniform internal metal structure, balance hardness and strength
Tempering: Reduce brittleness after quenching, enhance impact resistance for wear-resistant cast pipes
8. Quality Inspection Items (EN10204 3.1 test report provided)
Dimensional Inspection: Outer diameter, inner diameter, wall thickness, length, flange size, connection size
Surface Inspection: Sand holes, shrinkage cavities, cracks, burrs, casting defects
Mechanical Performance Test: Tensile strength, yield strength, elongation, hardness, impact test
Process Performance Test: Hydrostatic pressure test, air tightness leakage test
Non-destructive Testing: Magnetic particle inspection, ultrasonic flaw detection, radiographic inspection
Chemical Composition Analysis: Melting spectrum test of raw material alloy components
9. Main Application Fields
Municipal Water Supply & Drainage Engineering: Ductile iron cast pipes for urban water supply, sewage, rainwater discharge
Mining & Metallurgy Industry: Wear-resistant alloy cast pipes for mineral slurry, tailings conveying
Chemical Industry: Anti-corrosion cast steel pipes for acid, alkali, salt chemical medium transportation
Thermal Power & Boiler Equipment: High-temperature cast pipes for boiler flue, circulating water, waste heat recovery
Hydraulic & Heavy Machinery: Integral cast pipe fittings with flanges for hydraulic stations, large engineering equipment
Oil & Gas Transportation: Thick-wall high-pressure cast steel pipes for crude oil, natural gas transmission pipelines
Building Fire Protection & Industrial Circulation: Large-diameter cast pipe fittings for fire water, cooling water circulation
10. Packaging & Export Logistics
Single piece wrapped with plastic film, wooden frame reinforcement for large-diameter pipes; anti-collision rubber pads for flange surfaces to prevent scratch damage
Origin: Liaocheng, Shandong, warehouse delivery within 5-7 days; container loading at Tianjin Port, FOB, CFR, CIF trade terms acceptable
Delivery attached documents: Material chemical composition certificate, mechanical test report, NDT inspection report, packing list, commercial invoice
11. Performance Comparison: Cast Pipe vs Precision Seamless Tube
| Item | Cast Pipe | Precision Seamless Steel Tube |
|---|---|---|
| Molding Method | Molten metal integral casting | Hot piercing + cold rolling / cold drawing |
| Wall Thickness Range | 6–100mm, ultra-thick wall customizable | 0.5–20mm, thin & medium wall mainly |
| Structural Feature | One-piece cast flange, tee, bent pipe complex structure | Straight pipe only, additional welding for fittings |
| Internal Density | Centrifugal casting dense, sand casting with minor tiny pores | Extremely dense, no internal shrinkage cavity |
| Pressure Application | Medium & ultra-high pressure, heavy impact abrasive medium | Medium-low pressure clean hydraulic fluid |
| Corrosion & Wear Resistance | Alloy adjustable, excellent wear & anti-corrosion performance | General carbon steel weak anti-abrasion, stainless steel optional |
| Machining Volume | More grinding processing required | Small allowance, direct assembly available |
12. Customization Services
Custom drawing production of non-standard diameter, wall thickness and special-shaped bent pipes, tees, elbows
Alloy composition customization: wear-resistant, high-temperature resistant, acid & alkali anti-corrosion cast materials
Various anti-corrosion coating customization: epoxy coal tar, fusion bonded epoxy FBE, hot dip galvanizing
Deep processing: drilling, tapping, polishing, finish machining on flange and pipe ends
Support small batch sample casting and large-volume export bulk orders
Send Inquiry to This Supplier
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