China Forged Rolled Steel Gas & Steam Turbine Rings | Custom Seamless Turbine Forgings Manufacturer
Premium Forged Rolled Steel Gas & Steam Turbine Rings From ISO 9001 Certified China Manufacturer
Jiangsu Liangyi Co., Limited was founded in 1997, it is a professional ISO 9001:2015 certified manufacturer of forged rolled steel gas & steam turbine rings in Jiangyin, Jiangsu, China. With an 80,000㎡ modern production facility and 40 million USD in fixed assets, we have end-to-end forging processes from steel melting, open die forging, seamless ring rolling, precision heat treatment, to CNC machining, 100% according to international standards and custom client drawings.
Our seamless rolled gas & steam turbine rings are produced precisely for the most demanding critical applications in thermal power plants, combined cycle power stations, hydroelectric projects, oil & gas power generation facilities, and industrial turbine systems. With a single-piece weight capacity ranging from 30KGS to 30,000KGS, maximum outer diameter up to 6 meters, and an annual production capacity of 120,000 tons, we are one of China's leading turbine forging suppliers, and we have rich experience to export our products to over 50 countries across Europe, North America, the Middle East, Southeast Asia, and Australia.
Our Main E-E-A-T & Competitive Advantages
- Complete in-house one-stop production: from 30T EAF steel melting to final CNC machining, no outsourcing, complete quality traceability
- Industry-leading forging equipment: 6300T hydraulic forging press, 5M seamless ring rolling machine, and 10+ professional heat treatment furnaces
- Complete quality inspection: 100% non-destructive testing (NDT) and EN 10204 3.1 mill test report as standard; EN 10204 3.2 available upon request with third-party inspection support
- 27+ years of experience in turbine forging, provide products to global top-tier power equipment manufacturers and EPC contractors
- Manufactured in accordance with major international standards including ASME, ASTM, DIN, EN, PED 2014/68/EU, API 6A, JIS, and NACE MR0175 requirements
Advanced Manufacturing & Full-Process Quality Control for Turbine Rolled Rings
As a professional China gas turbine forged steel ring supplier for global power generation markets, we have built a complete production and quality management system to make sure every turbine ring meets the requirements for high temperature, high pressure, fatigue resistance, and long life cycle.
Industry-Leading Forging & Machining Equipment
Our forging workshop is equipped with a complete range of advanced equipment to handle custom turbine ring projects of all sizes and complexities, supporting both small-batch production orders and large-volume industrial orders:
- 2000T, 4000T, and 6300T Hydraulic Forging Presses for heavy-duty open die forging
- 0.75T to 9T Electro Hydraulic Forging Hammers for precision forging of complex shapes
- 1M to 5M Seamless Ring Rolling Machines for large-diameter turbine rolled rings up to 6 meters
- Ten computer-controlled heat treatment furnaces for precise quenching and tempering, optimizing mechanical properties
- Full 5-axis CNC machining centers for tight tolerance finishing, meeting the dimensional requirements for turbine assemblies
- Complete steelmaking facilities: 30T electric arc furnace (EAF), 30T ladle refining furnace (LF), and vacuum degassing furnace (VOD) for premium turbine-grade steel
Non-Destructive Testing & Full-Process Quality Assurance
Quality is the key to our steam turbine rolled steel rings production. We have an independent quality control laboratory equipped with complete testing equipment, which can process complete-process inspection from raw material incoming to final product delivery:
- Non-destructive testing (NDT): Ultrasonic Testing (UT), Magnetic Particle Testing (MT), Penetrant Testing (PT), and Radiographic Testing (RT) to detect internal and surface defects
- Chemical composition testing: Direct-reading spectrometer to make sure precise control of alloy elements, meeting material grade standards
- Mechanical property testing: Room and high temperature tensile testing, impact testing, hardness testing, and creep testing to verify performance in harsh operating conditions
- Metallographical testing: Metallographic microscope to control grain size, microstructure, and carbide distribution which can make sure long-term fatigue resistance
Every forged rolled steel gas & steam turbine ring has 100% inspection before delivery, with full traceability of raw materials, production processes, and testing results, according to global quality standards.
Certified Material Grades for Critical Gas & Steam Turbine Forging Applications
We produce custom forged turbine rings for power generation in high-performance turbine-grade materials, all the materials are carefully selected to match the specific operating conditions of your gas and steam turbine systems, which including high temperature oxidation resistance, high pressure creep resistance, corrosion resistance, and low cycle fatigue performance. Our material grades include:
Heat-Resistant Carbon & Alloy Steel Forgings
commonly used for steam turbine diaphragm rings, nozzle rings, and casing rings in subcritical and supercritical thermal power plants, with high temperature strength and creep resistance:
- ASTM/ASME Standard: A182 F9, F11, F22, F91, F92, A694 F42-F70, 1045, 4130, 4140, 4340
- DIN/EN Standard: 42CrMo4 (1.7225), 34CrNiMo6 (1.6582), 30CrMoNiV5-11 (1.6946), 28CrMoNiV4-9 (1.6985), S355J2 (1.0570)
Stainless & Duplex Steel Forgings
It is ideal for turbine components in corrosive environments, including steam turbine guide vane rings, gas turbine exhaust rings, and turbine components in coastal power plants:
- Austenitic Stainless Steel: 304/304L, 316/316L, 321/321H, 347/347H, 310S
- Martensitic & Precipitation Hardening Stainless Steel: F6NM (1.4313), 410, 420, 17-4PH, 15-5PH
- Duplex & Super Duplex Stainless Steel: 2205 (F51), 2507 (F53), F55, with best corrosion resistance and mechanical strength
Nickel-Based Super Alloys
It is suitable for the most high-temperature environments in gas turbine combustion chambers, turbine inlet rings, and high-pressure turbine components, operating at temperatures up to 750℃ and above:
- Inconel® Series: 600, 601, 625, 718, X750
- Incoloy® Series: 800, 800H, 825, 925
- Hastelloy® Series: C276, C22, B2, X
- Monel® & Nimonic® Series: Monel® 400, K500, Nimonic® 80A, 75
Global GEO-Targeted Project Cases & Industrial Applications
Our open die forged turbine rings are commonly used in gas turbines, steam turbines, hydro turbines, combined cycle power plants, and industrial turbine systems all over the world. Below are our project references across our main target markets, 100% according to local industry standards and regulatory requirements:
Europe Market Project References (Manufactured with Reference to PED 2014/68/EU Requirements)
Gas Turbine Combustion Chamber Rings for German & French Combined Cycle Power Projects
We provided custom seamless rolled gas turbine combustion chamber rings for a leading European energy equipment manufacturer's H-class combined cycle power projects in Germany and France. These forged rolled steel gas & steam turbine rings were produced from Inconel® 718 nickel-based superalloy, they have a 3.5-meter outer diameter, exceptional high-temperature oxidation resistance, and precise CNC machining tolerances within ±0.02mm. All products are manufactured with reference to PED 2014/68/EU requirements, with EN 10204 3.1 mill test reports and third-party witness inspection by a recognized European inspection body.
Middle East Market Project References (NACE Compliant)
High-Temperature Turbine Nozzle Rings for Saudi Arabian Oil & Gas Power Generation Facilities
We produced custom forged turbine nozzle rings with ASTM A182 F22 alloy steel for a large-scale associated gas power generation project in Saudi Arabia, according to NACE MR0175 sour service standards. With a maximum diameter of 4.2 meters and a single-piece weight of 12 tons, these rings are suitable for withstanding harsh high-sulfur, high-temperature operating conditions up to 650℃. All products were tested in accordance with API 6A requirements and 100% UT/MT inspection, and have good performance in continuous operation since 2019.
Southeast Asia Market Project References
Steam Turbine Rotor Retaining Rings for Thai & Vietnamese Supercritical Thermal Power Plants
We produced custom forged rotor retaining rings for 600MW supercritical steam turbine generators for multiple thermal power plants in Thailand and Vietnam. Made from ASTM A182 F91 martensitic heat-resistant steel with a maximum diameter of 2.8 meters, these seamless rolled gas steam turbine rings have high-temperature mechanical property verification and 100% volumetric NDT testing, meeting the power generation industry standards. Our one-stop production capability can shorten the delivery cycle by 20% compared with local suppliers, with superior quality.
Oceania Market Project References (AS/NZS Compliant)
Hydro Turbine Guide Vane Rings for Australian Hydropower Stations
We produced seamless rolled guide vane rings for a 300MW hydropower station in Queensland, Australia. These rings are made from S355J2+N carbon steel with a 5.2-meter outer diameter, they have great low-temperature impact resistance and corrosion resistance for underwater operating environments. All products follow AS/NZS standards and they have been installed and operating stably since 2021.
Domestic China Market Project References
Industrial Steam Turbine Diaphragm Rings for Domestic Heavy Industry Captive Power Plants
For a large domestic steel group's 125MW industrial steam turbine captive power plant, we provided custom forged steam turbine diaphragm rings with a maximum diameter of 3.2 meters, made from 42CrMo4 alloy steel. These rings have requirements for dimensional precision, concentricity, and fatigue resistance for long-term continuous operation. Our in-house forging, heat treatment, and machining production can make sure the control over product quality, reducing the customer's overall procurement cost by 15% compared to competitors.
Custom Capabilities for Gas & Steam Turbine Forged Rolled Rings
We are a professional manufacturer of heavy-duty forged rolled rings for gas & steam turbine forged rolled rings, we provide complete custom forging production to meet your project requirements:
- Size Range: The largest outer diameter of seamless rolled rings is 6 meters, and the weight of a single piece ranges from 30KGS to 30,000KGS.
- Standard Compliance: Our products are manufactured in accordance with ASTM, ASME, DIN, EN, API, JIS, PED, NACE and other international standard requirements
- Customization Scope: You can choose the material grade, design the forging process, improve the heat treatment, and CNC machine according to your drawings and technical specifications.
- Testing & Certification: We can provide complete NDT testing and mechanical property testing. EN 10204 3.1 mill test reports are provided as standard; EN 10204 3.2 reports are available upon request with third-party inspection support from BV, SGS, TÜV, etc.
- Production Flexibility: We have shortened the lead time for small batch orders, and we have stable large-volume production capacity for long-term project supply
- Global Service: We provide logistics support from door to door, technical support in multiple languages, and after-sales service to customers all over the world.
Frequently Asked Questions (FAQ) About Turbine Forged Rings
We can make seamless rolled turbine rings with an outer diameter of up to 6 meters and a single-piece weight of up to 30 tons. These rings can be used in almost all gas and steam turbine applications in the power generation industry.
Our turbine forged rings are manufactured in accordance with all major international standard requirements, including ASTM, ASME, DIN, EN, API 6A, JIS, PED 2014/68/EU, and NACE MR0175. We can also customize production according to your project-specific standards and technical requirements.
The most commonly used materials for gas turbine components which used in high-temperature environments are nickel-based super alloys such as Inconel® 625, Inconel® 718, and Incoloy® 800H. Heat-resistant alloy steels are commonly used for lower-temperature steam turbine components such as ASTM A182 F11, F22, F91, and F92 , because they have great creep resistance and high-temperature strength.
We support complete third-party inspection from globally recognized institutions, such as BV, SGS, TÜV Rheinland, and Lloyd's Register. We can also do witness inspection at our factory during the production and testing process as per your requirements.
The standard lead time for custom turbine forged rings is 30-45 days, and the lead time for stainless steel and nickel-based super alloy products is 45-60 days, the lead time depends on the complexity of the product, material grade, and order quantity. We can also accept your urgent orders.
Contact Us for Custom Gas & Steam Turbine Forged Rings Quotation
Jiangsu Liangyi is your best choice for high-quality forged rolled steel gas & steam turbine rings from China. We have 27+ years of forging experience, advanced production equipment, and quality management system, so we are committed to providing superior quality turbine forgings at competitive prices for clients all over the world.
Please send your detailed drawings, material requirements, order quantity, and technical specifications to us, we will provide you a detailed, no-obligation quotation within 24 hours.