Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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Large Diameter Forged Discs for Pressure Vessels and Heavy Equipment. Our large diameter forged discs are precision-manufactured to meet the rigorous demands of pressure vessels and heavy industrial equipment applications. These discs serve as critical components in high-pressure environments, ensuring superior strength, durability, and safety.
Key Features:
Material Options: Available in high-quality carbon steels and alloy steels such as 35#, 45#, 42CrMo, 42CrMo4, 18CrNiMo7-6, and other industry-standard grades tailored for exceptional mechanical properties.
Diameter Range: Customizable large diameters to fit a wide range of pressure vessel and heavy equipment specifications.
Forging Process: Manufactured using advanced open-die and closed-die forging techniques to achieve optimal grain flow and enhanced mechanical strength.
Heat Treatment: Available with tailored heat treatment options including normalizing, quenching, and tempering to meet specific hardness and toughness requirements.
Dimensional Accuracy: Strict quality control ensures tight tolerances and superior surface finish.
Applications:
Large diameter forged discs are widely used in demanding industrial environments, including:
Pressure vessels – ensuring structural integrity under high pressure and temperature.
Boilers – supporting high thermal stress and pressure cycles.
Heavy-duty cranes – providing strength and stability in load-bearing rotating parts.
Mining machinery – withstanding abrasive conditions and heavy mechanical loads.
Oil and gas equipment – functioning reliably in extreme pressure and corrosive environments.
Other heavy industrial sectors – including petrochemical, power generation, and metallurgical industries.
| Item | Details |
|---|---|
| Product Name | Large Diameter Forged Discs for Pressure Vessels and Heavy Equipment |
| Material Grades | - High-strength alloy steels: 42CrMo4, 18CrNiMo7-6, 30CrNiMo8 - Carbon steels: 35#, 45# - Delivers excellent tensile strength, high temperature resistance, and long-term stability under extreme pressure conditions |
| Forging Equipment | - Hydraulic hammers: 5T / 8T / 12T - 3600T open-die forging press for large-diameter solid discs - Capable of forging discs up to several meters in diameter with uniform internal structure |
| Manufacturing Process | Hot Forging → Normalizing / Quenching + Tempering → Ultrasonic Testing → Rough / Semi-Finish Machining → Dimensional & Surface Inspection |
| Forging Ratio | ≥ 3.0 — Ensures optimal grain flow orientation for enhanced fatigue strength, impact resistance, and structural reliability in pressure-bearing applications |
| Applications | - End covers and tube sheets for pressure vessels and boilers - Flange-integrated disc components in petrochemical reactors - Base discs and support plates in large-scale industrial machinery - Bearing seats and load plates in metallurgical and energy systems |
| Heat Treatment Options | - Quenched + Tempered for high strength and improved toughness - Normalizing for refined grain structure and dimensional stability - Stress relief annealing to eliminate internal stresses and improve service life |
| Testing & Inspection | - Chemical: Spectrometer analysis for precise alloy composition - Mechanical: Hardness, tensile strength, yield strength, and impact toughness (longitudinal & transverse) - Ultrasonic Testing (UT): 100% volumetric flaw detection - Dimensional: Diameter roundness, thickness uniformity, flatness, surface roughness |
| Value-Added Services | - Pre-machining of bolt circles, sealing grooves, and counterbores - Export-grade packaging for sea/land transport - Full traceability: heat number, batch number, mechanical & UT test records |
The steel forgings production flow:
Raw material steel ingot into warehouse(test the chemical composition) → Cutting→ Heating(Furnace temperature test) → Heat treatment after forging(Furnace temperature test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal dimension, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking(steel stamp, mark)→ Storage Shipment.
Packaging & Delivery
We ensure your products arrive securely and efficiently:
Frequently Asked Questions (FAQs)
1. What is your forging weight range?
We produce forged parts ranging from 100 kg to 7000 kg.
2. Do you provide heat treatment and machining?
Yes, we offer full in-house heat treatment, rough, and finish machining services.
3. Which industries do you supply to?
We serve wind energy, heavy equipment, port machinery, transmission systems, and more.
4. What is your production lead time?
With stock: Around 30 days
Without stock: 40–45 days
5. Where is your factory located?
In Changzhou City, near Shanghai, with shipping via Shanghai Port.
Request a Quote
Please send your technical drawings and requirements to us. Our engineers will review and provide you with a professional quotation and solution shortly.