TOBO STEEL GROUP CHINA
| Testing | Ultrasonic + hydrostatic test |
| Supply Ability | 50 Metric Ton/Metric Tons per Month |
| Material Grade | ASTM A182 F11 / F22 / F91 (Chrome Moly) |
| Application | Power Plant Boiler and High Temperature Steam Systems |
| Pressure Rating | Class 300 to Class 2500 |
| Heat Treatment | Normalized and tempered per ASTM A182 |
| Payment Terms | L/C,T/T,Western Union |
| Flange Type | Weld Neck / Blind / RTJ |
| Delivery Time | 7-30 days |
| Product Name | High Temperature Alloy Forged Steel Flange |
| Packaging Details | Plywood cases or customized |
| Temperature Range | Up to 590 deg C for F91 grade |
| Brand Name | TOBO |
| Model Number | A182 F11 / F22 / F91 |
| Certification | ISO9001:2015; SGS/BV/ABS/LR/TUV/DNV/API/PED available |
| Place of Origin | China |
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Product Specification
| Testing | Ultrasonic + hydrostatic test | Supply Ability | 50 Metric Ton/Metric Tons per Month |
| Material Grade | ASTM A182 F11 / F22 / F91 (Chrome Moly) | Application | Power Plant Boiler and High Temperature Steam Systems |
| Pressure Rating | Class 300 to Class 2500 | Heat Treatment | Normalized and tempered per ASTM A182 |
| Payment Terms | L/C,T/T,Western Union | Flange Type | Weld Neck / Blind / RTJ |
| Delivery Time | 7-30 days | Product Name | High Temperature Alloy Forged Steel Flange |
| Packaging Details | Plywood cases or customized | Temperature Range | Up to 590 deg C for F91 grade |
| Brand Name | TOBO | Model Number | A182 F11 / F22 / F91 |
| Certification | ISO9001:2015; SGS/BV/ABS/LR/TUV/DNV/API/PED available | Place of Origin | China |
| High Light | High Temperature Alloy Steel Flanges ，Power Plant Boiler Forged Flanges ，Chrome Moly Forged Steel Flanges | ||
High temperature alloy steel forged flanges are essential connecting components designed to maintain structural integrity in power plant boiler and steam systems at elevated temperatures where carbon steel loses strength. Manufactured from chrome moly alloy steel in ASTM A182 grades F11, F22, and F91, each grade is specifically selected for its superior creep resistance at high service temperatures.
These flanges are engineered to withstand decades of high-pressure steam service, thermal transients, and start-stop cycles. Every high temperature alloy steel flange undergoes comprehensive forging, heat treatment, and testing processes, with full documentation provided for quality assurance.
Our high temperature alloy steel forged flanges are normalized and tempered after forging to develop the required tensile and creep properties, with heat treatment parameters recorded for each batch. F91 grade material is available for the most demanding superheater and main steam applications up to approximately 590°C. Weld neck flanges are the preferred type for power plant boiler service due to their tapered hub design, which allows for full penetration butt welding that performs reliably under creep conditions.
| Materials | ASTM A182 F11 (1.25Cr-0.5Mo), F22 (2.25Cr-1Mo), F91 (9Cr-1Mo-V) |
|---|---|
| Application | Boiler piping, superheater, main steam, feedwater and turbine connections |
| Temperature Range | Up to 590°C depending on grade |
| Pressure Rating | Class 300 to Class 2500 |
| Size Range | 1/2" to 24" (DN15 to DN600) |
| Flange Type | Weld Neck, Blind, RTJ |
| Heat Treatment | Normalized and tempered per ASTM A182 |
| Testing | Tensile, impact, hardness, ultrasonic and hydrostatic test |
High temperature alloy steel forged flanges for power plant boiler service demand strict process control, and our workshop follows dedicated alloy steel procedures. Every heat undergoes chemical analysis verification, forging temperature monitoring, and each flange is normalized and tempered with recorded furnace charts before mechanical testing.
Tensile, impact, and hardness results are reported per heat, and we have extensive experience supplying high temperature alloy steel forged flanges for boiler maintenance and new power plant projects with comprehensive traceability documentation.
For main steam service above 540°C, F91 is commonly selected for its high creep strength. F22 is a proven choice for many reheat and feedwater applications. Our engineers will confirm the appropriate grade based on your specific design temperature and pressure requirements.
After forging, every flange undergoes normalized and tempered heat treatment in controlled furnaces with recorded time and temperature charts. Hardness and mechanical properties are verified after heat treatment to ensure the material meets ASTM A182 requirements.
Yes. Charpy impact tests can be performed at the temperature specified in your project, and the results are included in the comprehensive material certificate package.
Yes. RTJ seal faces with metal ring gaskets are available for the highest pressure boiler connections, precisely machined to ASME B16.5 groove dimensions.
Company Details
Business Type:
Manufacturer,Agent,Importer,Exporter,Trading Company,Seller
Year Established:
1998
Total Annual:
100000-100000000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ... TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ...
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