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High Temperature ASME SA182 F321H Stainless Steel Flange with 100% Inspection UT/MT/PT

High Temperature ASME SA182 F321H Stainless Steel Flange with 100% Inspection UT/MT/PT

High Temperature Stainless Steel Flanges

ASME SA182 Stainless Steel Flanges

High Temperature pressure vessel flange

Place of Origin:

China

Brand Name:

YUHONG

Certification:

ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Model Number:

ASTM A182 F321H

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Product Details
Face Type:
Raised Face/Flat Face/RTJ/LM/LF
Certifications:
ASME B16.5, ASTM A182
Material:
Stainless Steel
Corrosion Resistance:
High
Sealing Surface:
RF
Specification:
B16.5 B16.9 API605
Structure:
Flanges
Connection:
Welding
Flange Face Type:
Raised Face
Highlight:

High Temperature Stainless Steel Flanges

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ASME SA182 Stainless Steel Flanges

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High Temperature pressure vessel flange

Payment & Shipping Terms
Minimum Order Quantity
1 set
Price
Negotiable
Packaging Details
Ply wooden Case/ Iron Structural Case
Delivery Time
15-30 Days
Payment Terms
L/C,T/T
Supply Ability
According to Client's Request
Product Description
High Temperature Stainless Steel Flanges ASME SA182 F321H 100% Inspection UT/MT/PT
Premium Stainless Steel Flanges for Extreme Heat & Pressure Applications
About YUHONG

YUHONG Group is a globally recognized manufacturer specializing in high-performance flanges and pressure vessel components for critical industrial applications. With ISO 9001, ASME, and PED certifications, we deliver engineered solutions for the most demanding operating conditions.

Why Choose YUHONG?
25+ Years in high-temperature flange manufacturing
Full material traceability with Mill Test Certificates
Custom fabrication for unique project requirements
Global supply chain with fast lead times
Product Overview

YUHONG's ASME SA182 F321H Flanges are specifically engineered for high-temperature service in:

• Petrochemical processing
• Power generation systems
• Refinery applications
• Aerospace components
• Nuclear power plants

These flanges feature stabilized titanium composition for superior resistance to intergranular corrosion at elevated temperatures (up to 816°C/1500°F).

Key Features & Benefits
High-Temperature Performance: Stabilized with titanium for carbide precipitation resistance
Enhanced Strength: Maintains structural integrity under thermal cycling
Full NDT Inspection: 100% UT (Ultrasonic), MT (Magnetic Particle), and PT (Liquid Penetrant) tested
Multiple Standards: Compliant with ASME B16.5, B16.47, and custom specifications
Corrosion Resistant: Excellent performance in oxidizing and mildly reducing environments
Technical Specifications
Material & Mechanical Properties
Property Value Standard
Material Grade ASME SA182 F321H (Ti-stabilized) ASME BPVC Sec. II
Tensile Strength ≥ 515 MPa (75 ksi) ASTM A370
Yield Strength ≥ 205 MPa (30 ksi) ASTM A370
Elongation ≥ 30% ASTM A370
Hardness ≤ 90 HRB ASTM E18
Max Operating Temp 816°C (1500°F) ASME B16.34
Dimensional Specifications
Parameter Range
Size Range 1/2" to 48" (DN15 to DN1200)
Pressure Class Class 150 to Class 2500
Face Types RF, FF, RTJ (or custom)
Surface Finish 3.2 μm Ra or better
Non-Destructive Testing (NDT)
Test Method Standard Coverage
UT (Ultrasonic) ASTM A388 100% volume inspection
MT (Magnetic Particle) ASTM E709 100% surface examination
PT (Liquid Penetrant) ASTM E165 100% surface inspection
Applications
✅ FCCU and hydrocracker units
✅ Steam headers and superheaters
✅ Heat exchanger systems
✅ High-temperature piping
✅ Boiler and pressure vessel connections
Quality Assurance

YUHONG implements strict quality control throughout manufacturing:

• Raw material verification
• In-process dimensional checks
• Final NDT inspection
• Hydrostatic testing available
• Full documentation package
Ordering Information

Customization Options Available:

High Temperature ASME SA182 F321H Stainless Steel Flange with 100% Inspection UT/MT/PT 0
High Temperature ASME SA182 F321H Stainless Steel Flange with 100% Inspection UT/MT/PT 1
• Special sizes outside standard range
• Unique facing requirements
• Heat treatment variations
• Special marking and packaging
Ratings& Review

Overall Rating

3.7
Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings
5 stars
0%
4 stars
67%
3 stars
33%
2 stars
0%
1 stars
0%

All Reviews

S
S*r
Germany Feb 10.2026
The normalized state of these flanges is highly uniform. We found no grain issues during subsequent NDT testing, and they fit the shell perfectly.
R
Robert Miller
United States Jan 7.2026
Fully meets the rigorous requirements of TEMA R standards. We used these SA266 Grade 2N flanges for a refinery project in Texas. The machining precision is impressive, and the sealing face finish is absolutely perfect.
A
A*d
United Arab Emirates Nov 26.2025
The packaging was very solid; even after long-distance sea freight, there were no dents on the sealing faces.

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