Large Diameter Carbon Steel Flange
Dingxiang Yixinyuan Flange Processing Co., Ltd. (Yixinyuan Flange) specializes in manufacturing large-diameter carbon steel flanges (24" to 160" / DN600 to DN4000) for high-stress industrial piping systems.
- Product Introduction
Large Diameter Carbon Steel Flanges (24" – 160")
Engineering Integrity for High-Pressure Critical Pipelines
Dingxiang Yixinyuan Flange Processing Co., Ltd. (Yixinyuan Flange) specializes in manufacturing large-diameter carbon steel flanges (24" to 160" / DN600 to DN4000) for high-stress industrial piping systems. Designed for oil & gas pipelines, pressure vessels, power generation, and municipal infrastructure, our flanges are engineered to ensure leak-proof integrity and long-term mechanical stability in the most demanding environments.
Global Standards & Size Range
|
Standard / Specification |
Size Range |
Pressure Ratings |
Facing Types |
|
ASME B16.47 Series A / B |
24" – 120" |
Class 150 – 900 |
RF, RTJ |
|
EN 1092-1 / DIN |
DN600 – DN3000 |
PN6 – PN40 |
Type 01, 05, 11 |
|
ASME B16.5 |
24" (Trans.) |
Up to Class 2500 |
RF, FF, RTJ |
|
Custom / Non-Standard |
Up to 160" |
Tailored |
Per Drawing |
Series A vs. Series B: Series A flanges (thicker, fewer/larger bolts) are built for heavy-duty structural piping and high external loads. Series B flanges (compact, more/smaller bolts) provide cost-effective efficiency for valve connections and space-constrained retrofits.
High-Strength Materials & Performance
We source premium, fully traceable steel billets from tier-one mills, accompanied by EN 10204 3.1 Material Test Certificates (MTC).
ASTM A105
For general pressure/high-temp service. Tensile Strength: ≥485 MPa | Yield Strength: ≥250 MPa.
ASTM A350 LF2
For cryogenic/arctic environments. Guaranteed Charpy V-Notch impact toughness down to −46 ∘ C (−50 ∘ F).
Forging vs. Casting: The Yixinyuan Flange Quality Difference
Many low-cost alternatives rely on casting, which is prone to internal porosity and gas holes that lead to catastrophic failures under pressure. Yixinyuan Flange exclusively utilizes closed-die forging and seamless ring-rolling. This ensures a continuous, optimized grain structure that increases fatigue resistance by over 30% compared to cast components.
Our 5-Stage Precision Protocol:
- Traceability: Heat numbers are deep-stamped into every billet for 100% cradle-to-grave verification.
- Structural Integrity: Forging with 8,000-ton hydraulic presses and seamless ring-rolling (up to 5,000mm diameter) eliminates internal defects.
- Stress Relief: Precise Normalizing or Quenching & Tempering ensures uniform hardness and eliminates thermal stress.
- CNC Precision: Vertical CNC lathes maintain critical tolerances, including a 125-250 AARH phonographic finish for optimal sealing.
- Rigid TPI Support: We routinely cooperate with SGS, TÜV, BV, and DNV for pre-shipment witness testing.
Global Logistics & Protection
We ship to your job site in "ready-to-install" condition:
Surface
Heavy-grade anti-rust oil or industrial black lacquer.
Protection
Machined faces are covered with heavy plywood/plastic discs to prevent impact damage.
Packaging
ISPM-15 compliant fumigated crates with waterproof internal barriers for extended outdoor storage.
FAQ
Q: What is your maximum manufacturing capacity?
A: We routinely handle standard configurations up to 120" (DN3000). For custom engineering projects, we can forge up to 160" based on your specific CAD drawings.
Q: Can your flanges be customized for non-standard drilling or thickness?
A: Absolutely. Our engineering team can translate your equipment blueprints into precise manufacturing programs, including custom bolt-hole patterns, spot-facing, and reinforced flange hubs.
Q: What is the typical lead time?
A: For standard ASME/EN configurations, we maintain billet stocks to expedite production within 3–5 weeks. For complex, non-standard projects, we provide a transparent, phase-by-phase delivery schedule immediately following design sign-off.
Q: How do you prevent large-diameter warping during heat treatment?
A: We use specialized multi-point suspension fixtures and flat-bed furnace positioning to ensure even thermal distribution, preventing out-of-flatness warping before final machining.
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