High-pressure Alloy Steel Flange Castings
High-Pressure Alloy Steel Flange Castings
Product Overview
Specialized in manufacturing high-pressure alloy steel flanges for petroleum, chemical and nuclear industries, compliant with ASME/API/EN standards up to Class 2500 (PN420) rating.
Material Grades (Global Standards)
|
China GB |
ASTM |
EN |
JIS |
Temp Range |
Pressure Class |
|
ZG16Cr5Mo |
A217 WC6 |
1.7357 |
SCM435 |
≤593℃ |
Class 1500 |
|
ZG12Cr9Mo1 |
A217 C12A |
1.7380 |
- |
≤650℃ |
Class 2500 |
|
ZG08Cr18Ni9 |
A351 CF8 |
1.4308 |
SCS13 |
≤425℃ |
Class 900 |
|
ZG03Cr17Ni14Mo2 |
A351 CF3M |
1.4409 |
SCS16A |
≤350℃ |
Class 600 |
Key Features
High-Pressure Performance
Burst pressure ≥3x rated pressure
Creep rupture strength ≥100MPa@600℃
Seal face hardness HB180-220
Precision Casting
Dimensional accuracy CT7-8
Min. wall thickness 15mm
Machined face finish Ra≤3.2μm
Special Treatments
Quenching & tempering (QT)
Plasma-transferred arc welding
Sulfide stress corrosion protection
Technical Parameters
Size range: DN15-DN1200
Pressure rating: PN16-PN420
Standards: ASME B16.5, EN 1092-1
Face types: RF/FF/RTJ (customizable)
Applications
✓ Petroleum refining pipelines
✓ Nuclear steam system flanges
✓ Gas compressor station valves
✓ Supercritical boiler connections
✓ Chemical reactor nozzles
Quality Control
Material Tests:
✓ OES analysis (±0.01%)
✓ Charpy V-notch impact test
NDT:
✓ 100% MT (ASTM E709)
✓ Ultrasonic thickness measurement
Performance Tests:
✓ Helium leak test
✓ Hydrostatic burst test
Certifications
✓ ASME Section VIII Div.1
✓ PED 2014/68/EU (CE)
✓ NACE MR0175/ISO 15156
✓ API 6A/17D
Note:
Non-standard sizes available
Dimensional inspection reports
Material test records (MTR)
Emergency delivery service
FAQ
Q: What casting technologies do you use?
Q: Do you offer in-house testing and inspection?
Q: Can you provide metallurgical analysis reports?
Q: What software do you use for design and modeling?
Q: What makes your products stand out technically?
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