What Is Centrifugal Casting?
Centrifugal casting is a method of casting molten metal into a mold that rotates at high speed. It is used to produce cylindrical parts with precise dimensions and uniform internal structures, such as pipes and tubes. The process begins by spinning the mold on an axle supported by bearings while liquid metal is poured in through an opening at the top. As it cools, the centrifugal force pushes the molten metal against the walls of the mold, creating a strong bond between them.
Custom Centrifugal Casting
Centrifugal casting uses a rotating mold to produce custom metal components whose geometry and performance requirements suit the process. Tubes, sleeves, rings, rolls and cylinders are common examples, but they do not define the limit of our product scope. WELONG reviews custom centrifugal castings from the customer's drawing, material specification, service conditions, required dimensions and acceptance criteria.
Choosing a centrifugal casting manufacturer involves more than comparing maximum size or unit price. The alloy, casting geometry, machining allowance, heat treatment, critical interfaces and inspection plan must work together. As a centrifugal casting factory in China, WELONG supports drawing-based projects in carbon steel, stainless steel, alloy steel, superalloy steel and customer-specified materials, subject to technical review.
Send us your drawing, quantity, material requirement and service conditions. We will review the process route and identify the information needed for a technically comparable quotation.
WELONG Centrifugal Casting Capabilities
| Material | Carbon steel, Stainless steel, Alloy steel, Super-alloy steel, or as customer's request. |
| Max casting weight | 3000kgs |
| Max casting length | 4000mm |
| Max diameter | 2000mm |
| Min diameter | 70mm |
| Min wall thickness | 8mm |
| The precision of dimension | +/-1.5mm |
| Surface finish | Shot blasting, Painting, Galvanizing, Powder coating |
Which Service Conditions Determine the Material and Standard?
Selecting a material for a centrifugal casting requires more than naming a grade. To recommend the right material and specification, we first need to understand four aspects of your application.
Operating Temperature and Thermal Cycling
Provide both the normal operating temperature and the highest metal temperature the casting may reach. Also tell us whether the equipment runs continuously or goes through frequent heating and cooling cycles.
These conditions help determine the required alloy family and heat-treatment condition. For high-temperature austenitic steel pipe, ASTM A451/A451M may be relevant.
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01
Pressure and Mechanical Loading
Temperature alone is not enough when the casting must also withstand internal pressure, external load or rotation. Please provide the design pressure, load direction, rotational speed and any critical load-bearing areas.
For high-alloy centrifugal cast tubing used under pressure at elevated temperatures, ASTM A608/A608M may apply.
02
Corrosion and Wear Conditions
Tell us whether the component will be exposed to corrosive chemicals, furnace gases, molten metal, abrasive particles or lubricated sliding contact. Include the medium, concentration, temperature and expected wear location whenever available.
For ferritic/austenitic stainless steel pipe used in corrosive environments, ASTM A872/A872M may be relevant. For bronze and other covered copper-base alloy centrifugal castings, ASTM B271/B271M provides a potential specification route.
03
Material Verification and Acceptance
The purchase specification should define more than the material name. It should also identify the applicable product standard, required heat treatment, mechanical tests, inspection methods, acceptance criteria and supporting documents.
Terms such as "heat-resistant steel," "stainless steel" and "bronze" describe broad material families; they do not form a complete purchasing specification. Send us your drawing and service conditions so we can review the applicable material, standard and supplementary requirements for the individual order.
04
Need a Centrifugal Casting Built to Your Drawing?
Send us your drawing, material grade, quantity and service conditions. WELONG will review the casting geometry, machining allowance, heat treatment and inspection requirements, then prepare a technically matched quotation for your project.
Custom Centrifugal Casting Products
We manufacture custom centrifugal castings based on customer drawings, material specifications and application requirements. Our capabilities are not limited to the products listed below-we can also evaluate other centrifugal casting components for different industries.
Tubes and Pipe Sections
For high-temperature, pressure or corrosive applications.
Rolls and Cylinders
For furnaces, steel-processing lines and other industrial equipment.
Sleeves and Bushings
For pumps, valves, mining, marine and general machinery.
Rings and Wear Parts
Produced to specified dimensions, materials and machining requirements.
Furnace Components
Including radiant tubes, furnace rolls and other heat-resistant castings.
Other Custom Products
Send us your drawing, material, dimensions and service conditions. Our engineers will review the product geometry and centrifugal casting requirements.
Welong Products
Centrifugal Casting Inspection Process
The inspection plan for each centrifugal casting is defined by its material, drawing, service conditions and applicable product standard. The scope may include the following four stages.
Material and Traceability Verification
The material grade, heat number and required chemical composition are checked against the purchase specification. Traceability should remain linked to the casting and its inspection records throughout production.
Visual and Dimensional Inspection
The casting is checked for visible surface conditions and required dimensions. Depending on the drawing, inspection may include outside diameter, inside diameter, length, wall thickness, straightness, concentricity, runout and machined interfaces..
Nondestructive Examination
PT, MT, UT or RT may be specified to evaluate relevant surface or internal discontinuities. The appropriate method, inspection area and acceptance criteria depend on the alloy, geometry, service risk and applicable standard.
Mechanical and Metallurgical Testing
When required by the material standard or purchase specification, representative test samples may be used for tensile, impact, hardness or metallographic examination. Test results are reviewed together with the required material and inspection documents before release.
Inspection Equipments
Welong Factory
FAQ
Q: Can You Manufacture from Our Finished-Part Drawing?
A: Yes. We review the finished dimensions, material, machining allowance and inspection requirements before defining the centrifugal casting route.
Q: Is Centrifugal Casting Suitable for Every Custom Part?
A: No. Suitability depends on geometry, material, dimensions and production requirements. Send us your drawing for a manufacturing review.
Q: Can All Published Size Limits Be Combined in One Casting?
A: Not necessarily. Maximum weight, length, diameter and minimum wall thickness must be evaluated together with the material and casting geometry.
Q: Why Does the Inner Diameter Usually Require Machining?
A: The inner surface is the last area to solidify and may contain more segregated material or surface irregularities. A defined machining allowance helps achieve the required bore and surface condition.
Q: How Much Machining Allowance Should Be Added?
A: There is no universal value. It depends on the material, casting size, required finished dimensions and applicable tolerance standard.
Q: Can You Supply More Than the Products Shown on This Page?
A: Yes. The displayed products are representative examples. We can evaluate other centrifugal castings based on your drawings and specifications.
Q: Is a Centrifugally Cast Tube Automatically Suitable for Pressure Service?
A: No. Pressure service also requires the applicable material, product standard, testing and acceptance documentation to be defined..
Q: Why Do Quotations from Centrifugal Casting Companies Differ?
A: Suppliers may quote different materials, casting weights, machining scopes, heat treatments or inspections. Compare quotations using the same drawing and delivery requirements.
Q: What Information Is Needed for an Accurate Quote?
A: Send the drawing, material specification, quantity, service conditions, finished dimensions, machining scope and inspection requirements.