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  • TOBO STEEL GROUP CHINA
    Brazil---Aimee
    In the latest vendor rating, TOBO won the excellent rating, it is good, will continue to cooperate.
  • TOBO STEEL GROUP CHINA
    Thailand ---Dave Mulroy
    ASTM A213 T9 Alloy steel pipe ,Stable quality , good price, excellent serive, TOBO GROUP is our trustworthy partner .
  • TOBO STEEL GROUP CHINA
    USA ---Alfaro
    ASTM A182 F55 Super Duplex Flange ,Good quality , we like that ! And delivery time in time also ,very professional.
Contact Person : Joy Wang
Phone Number : 0086-21-31261985
WhatsApp : +8613524668060

High Temperature Alloy Steel Forged Flanges for Power Plant Boiler

  • High Temperature Alloy Steel Forged Flanges for Power Plant Boiler
  • High Temperature Alloy Steel Forged Flanges for Power Plant Boiler
  • High Temperature Alloy Steel Forged Flanges for Power Plant Boiler
  • High Temperature Alloy Steel Forged Flanges for Power Plant Boiler
  • High Temperature Alloy Steel Forged Flanges for Power Plant Boiler
Place of Origin China
Brand Name TOBO
Certification ISO9001:2015; SGS/BV/ABS/LR/TUV/DNV/API/PED available
Model Number A182 F11 / F22 / F91
Minimum Order Quantity 300 Kilogram/Kilograms
Price US $ 15 - 150 / Kilogram
Packaging Details Plywood cases or customized
Delivery Time 7-30 days
Payment Terms L/C,T/T,Western Union
Supply Ability 50 Metric Ton/Metric Tons per Month
Product Details
Product Name High Temperature Alloy Forged Steel Flange Application Power Plant Boiler And High Temperature Steam Systems
Material Grade ASTM A182 F11 / F22 / F91 (Chrome Moly) Temperature Range Up To 590 Deg C For F91 Grade
Pressure Rating Class 300 To Class 2500 Flange Type Weld Neck / Blind / RTJ
Heat Treatment Normalized And Tempered Per ASTM A182 Testing Ultrasonic + Hydrostatic Test
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High Temperature Alloy Steel Flanges

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Power Plant Boiler Forged Flanges

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Chrome Moly Forged Steel Flanges
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Product Description
High Temperature Alloy Steel Forged Flanges for Power Plant Boiler
Product Overview

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.

Specifications
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
Key Advantages
  • Chrome moly grades F11, F22 and F91 deliver reliable creep strength in boiler and steam service
  • Normalized and tempered heat treatment provides stable microstructure for high temperature operation
  • Weld neck hubs prepared for full penetration butt welding on thick wall boiler piping
  • Impact testing at low temperature available for cold start environments
  • Complete mechanical test reports with heat number traceability
  • Experience supplying power plant maintenance and EPC projects with expedited schedules
Quality Assurance & Documentation

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.

Frequently Asked Questions
Which alloy steel grade should we use for main steam piping flanges?

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.

How is the heat treatment of high temperature alloy steel forged flanges controlled?

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.

Do you provide impact test certificates for low temperature service?

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.

Can you supply RTJ flanges for high pressure steam?

Yes. RTJ seal faces with metal ring gaskets are available for the highest pressure boiler connections, precisely machined to ASME B16.5 groove dimensions.

Tags:

butt weld flanges

forgings flanges and fittings

forged fittings and flanges