Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30-45days |
| Packaging Details | Pallet |
| Face Type | Smooth and coated with anti-rust oil |
| Materials | Carbon steel,alloy steel chinese brand and more |
| Thickness | Customized ，Leave allowance as per drawing |
| Technics | Free forging |
| Production Process | Forging+heat treatment+rough machining |
| Features | High strength|resistant to corrosion |
| Packge | Wooden case or as customer's request |
| Surface treatment | Anti-rust oil |
| Brand Name | Tiangong |
| Model Number | TG-209 |
| Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 56000 Tons per year |
| Delivery Time | 30-45days | Packaging Details | Pallet |
| Face Type | Smooth and coated with anti-rust oil | Materials | Carbon steel,alloy steel chinese brand and more |
| Thickness | Customized ，Leave allowance as per drawing | Technics | Free forging |
| Production Process | Forging+heat treatment+rough machining | Features | High strength|resistant to corrosion |
| Packge | Wooden case or as customer's request | Surface treatment | Anti-rust oil |
| Brand Name | Tiangong | Model Number | TG-209 |
| Certification | ISO9001, ISO14001,ISO45001 | Place of Origin | Changzhou, China |
Custom Machined Forged Steel Flanges for Marine Engineering Equipment and Offshore Platforms
Our custom machined forged steel flanges are designed to meet the demanding requirements of marine engineering and offshore applications. Manufactured from high-strength steels through precision forging and tailored machining, these flanges offer exceptional resistance to corrosion, pressure, and mechanical fatigue. Each component undergoes strict quality control, including heat treatment and non-destructive testing, to guarantee dimensional accuracy and long-term reliability.
Key Features:
Superior strength and toughness for extreme marine environments
Excellent sealing performance for high-pressure pipeline connections
Precision-machined surfaces ensuring reliable assembly and extended service life
Available in custom dimensions and materials to suit project-specific requirements
Applications:
Offshore drilling and production platforms
Marine pipeline systems for oil, gas, and water transfer
Shipbuilding and propulsion systems
Subsea infrastructure requiring robust and durable flange connections
| Item | Details |
|---|---|
| Product Name | Custom Machined Forged Steel Flanges for Marine Engineering Equipment and Offshore Platforms |
| Material Grades | - Alloy steels (42CrMo4, F51 duplex stainless steel, Inconel alloys) for high strength and corrosion resistance in seawater environments - Carbon steels (A105, 20#, 45#) for standard pressure piping systems - Tailored material options based on offshore engineering project specifications |
| Forging Equipment | - Hydraulic Hammers: 5T, 8T, 12T for flange preforms - Heavy-duty forging presses up to 4,500T ensuring precise fiber flow in large-diameter flanges - Specialized heat treatment furnaces designed to achieve optimal hardness and corrosion resistance |
| Manufacturing Process | Material Inspection → Cutting & Preheating → Open Die Forging → Heat Treatment → CNC Machining for Flange Faces & Bolt Holes → Non-Destructive Testing (UT/MT/PT) → Dimensional & Surface Accuracy Checks → Final Coating/Protection → Packing & Delivery |
| Forging Ratio | ≥ 3.0 — Provides improved structural density, crack resistance, and long-term durability under fluctuating offshore loads |
| Applications | - Subsea and offshore oil & gas pipeline connections - Flange systems for drilling rigs and FPSO units - Marine engineering equipment exposed to seawater pressure and vibration - Shipbuilding pipeline networks and high-load pressure vessels |
| Delivery Conditions | - Quenched and Tempered to ensure high tensile strength, impact resistance, and pressure retention - Delivered in CNC-machined, semi-finished, or rough-machined state depending on project needs |
| Testing & Inspection | - Spectrometry for chemical composition verification - Mechanical Testing: Tensile, Yield, Impact, Hardness - Non-Destructive Testing: UT, MT, PT for flaw detection - Precision measurement of sealing faces, bolt circle diameter, and surface finish to guarantee leak-proof performance |
Process Overview:
Material verification → Organized storage and handling → Preliminary inspection of dimensions and quality → Uniform heating with controlled parameters → Forging operation and forming → Heat treatment to achieve desired mechanical properties → Intermediate quality verification → Rough machining for structural accuracy → Non-destructive testing (UT/MT) → Final inspection and approval → Surface finishing with protective coating and identification marking → Secure packaging and shipment to customer.
Contact Us for Precision Alloy Steel Forgings
Looking for forged components in 42CrMo or alternative premium alloys?
We provide flexible order quantities, reliable lead times, and worldwide delivery with complete certification support.
Reach out today for a quick quotation and expert engineering assistance tailored to your project needs.
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
1994
Total Annual:
27.5 million -28 million
Employee Number:
135~150
Ecer Certification：
Verified Supplier
About CHANGZHOU TIANGONG We are a Chinese company with over 30 years of forging experience. Our focus lies in the production of machine free forged products. We take pride in our independent quality assurance laboratory, which ensures that all our products meet ... About CHANGZHOU TIANGONG We are a Chinese company with over 30 years of forging experience. Our focus lies in the production of machine free forged products. We take pride in our independent quality assurance laboratory, which ensures that all our products meet ...
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