Select high-performance pipe flanges and custom forgings manufactured to ASME, EN, DIN, and JIS standards.
In modern high-pressure processing industries, operating environments present a dual challenge: extreme mechanical stresses paired with severely aggressive corrosive media. Traditional engineering approaches forced procurement teams to choose between economically prohibitive solid high-grade alloys (such as Inconel 625, Hastelloy C276, or Titanium Grade 2) or risk premature structural failure by using carbon steel with sacrificial coatings. As a premier China Bi Metal Flanges Manufacturer, Shanxi Yuxin Casting & Forging Co., Ltd. solves this equation through engineered bimetallic and metallurgical clad flange solutions.
Bi-metal flanges combine a heavy structural backing material (typically ASTM A105, ASTM A350 LF2, or ASTM A182 F22) designed to absorb mechanical pressure loads per ASME B16.5 / B16.47, with a high-performance Corrosion Resistant Alloy (CRA) layer metallurgically bonded or overlay welded onto the wet surfaces (seal face and internal bore).
Achieving a reliable bimetallic interface requires strict control over interface physics. Our plant utilizes two main manufacturing pathways for clad flange production:
Selecting the optimal substrate and cladding material pairing requires evaluating thermal expansion coefficients, galvanic corrosion potential, and hydrogen embrittlement susceptibility. Below is our standard engineering matrix:
| Base Substrate (Structural) | Cladding Alloy (Wetted Face) | Bonding Process | Target Application Environment |
|---|---|---|---|
| ASTM A105 / A105N | Stainless Steel 316L / 317L | Weld Overlay / Explosion | Refinery Distillation, Mild Sour Gas |
| ASTM A350 LF2 Class 1/2 | Inconel 625 (UNS N06625) | Hot-Wire TIG Cladding | Subsea Flowlines, Low-Temp Cryogenic |
| ASTM A182 F22 / F91 | Hastelloy C276 (UNS N10276) | Explosion + Hot Forging | High-Temp Hydrocrackers, Acid Plants |
| ASTM A694 F52 / F65 / F70 | Duplex 2205 / Super Duplex 2507 | Roll-Bonded / Overlay | Offshore Rigs, High-Yield Offshore Piping |
When global EPC firms and valve/piping distributors search for qualified China Bi Metal Flanges Manufacturers, geographic positioning and vertical supply integration dictate project success. Shanxi Yuxin Casting & Forging Co., Ltd. is located in the Zhuangli Enclave Industrial Zone of Dingxiang County, Shanxi Province — globally recognized as the “Hometown of Forging in China.”
Dingxiang's industrial cluster provides direct access to high-purity steel ingots, carbon steel billets, and specialized alloy stock. By eliminating secondary transport logistics for raw billets, Shanxi Yuxin reduces raw material procurement lead times by up to 35% compared to non-clustered factories.
Forging structural integrity relies heavily on precise post-forge thermal processing. Our facility operates computer-monitored normalizing, quenching, and tempering furnaces capable of executing stress-relieving cycles tailored to bimetallic structures without compromising interfacial bond strength.
Equipped with heavy-duty vertical lathes, 5-axis CNC machining centers, and multi-spindle drilling equipment, we achieve tolerances within ±0.1mm. High-precision serrated flange face finishing (125–250 µin AARH) guarantees perfect gasket seating during field installation.
With an annual output of 10,000 tons of forged flanges and over 2,000 tons of specialized forged components, Shanxi Yuxin maintains strict single-site quality control. Unlike trading companies that aggregate products from multiple small workshops, every bimetallic flange bearing the YUXIN stamp is melted, forged, clad, heat-treated, and tested under one roof.
Procuring heavy industrial components across international borders requires absolute compliance with engineering standards, environmental mandates, and quality assurance protocols. Foreign engineering procurement managers require rigorous proof of material verification, destructive testing, and international certification body audits.
Shanxi Yuxin Casting & Forging Co., Ltd. holds a comprehensive suite of international quality accreditations:
A major challenge in global industrial projects is the friction between regional piping standards. European projects built on EN 1092-1 / DIN metrics frequently connect to American ASME B16.5 skid systems or Japanese JIS B2220 modules. Our engineering department specializes in standard bridging and custom flange drafting:
Beyond off-the-shelf ANSI and DIN flanges, YUXIN engineers produce drawing-based non-standard bimetallic components up to 3,000 mm (120 inches) in diameter. We support OEM client requirements including custom bolt patterns, extended neck lengths, specialized RTJ grooves, and integrated tube-sheet flanges for heat exchangers.
Bi-metal flanges manufactured by Shanxi Yuxin are deployed across critical infrastructure sectors worldwide where joint failure carries catastrophic environmental or financial costs:
Installed on subsea christmas trees, manifold headers, and riser tie-ins. The outer ASTM A694 high-yield steel backing handles deepwater external hydrostatic pressure, while internal Inconel 625 weld cladding resists severe H2S, CO2, and high-salinity marine environments.
Hydrocracking and desulfurization units operate at elevated temperatures (>450°C) with high partial pressures of hydrogen. Bi-metal flanges utilizing chrome-moly base steel (A182 F22/F91) clad with Hastelloy or 347H stainless steel prevent high-temperature hydrogen attack (HTHA).
Reverse osmosis (RO) high-pressure pump headers require resistance to chloride pitting. Bimetallic flanges featuring low-cost carbon steel flanges with Duplex 2205 or Super Duplex 2507 cladding reduce capital expenditure by up to 50% compared to solid duplex systems.
The industrial piping sector is undergoing rapid technological evolution. As a forward-thinking China Bi Metal Flanges Manufacturer, Shanxi Yuxin invests in advanced R&D to stay ahead of international market shifts:
Expert answers from our senior engineering team regarding bi-metal flange design, standards, testing, and shipping.
Solid high-performance alloys such as Inconel 625, Hastelloy C276, or Titanium are extremely expensive. In large diameter flanges (e.g., NPS 12 and above) or high-pressure classes (Class 900 to 2500), over 80% to 90% of the flange volume serves purely structural strength purposes and does not contact the corrosive fluid. By using carbon or low-alloy steel for the structural body and cladding only the 3mm to 5mm wetted surface with expensive alloy, material costs are typical reduced by 40% to 65% without sacrificing corrosion resistance or mechanical rating.
To guarantee 100% bond integrity and zero disbonding during thermal cycling, Shanxi Yuxin subjects all bi-metal flanges to rigorous NDT protocols:
We forge flanges to ASME B16.5, ASME B16.47 Series A/B, EN 1092-1, DIN, JIS, GOST, and BS standards. Pressure classes range from Class 150 to Class 2500 (ANSI) and PN6 to PN400 (EN/DIN), in nominal sizes from 1/2" to 120" (DN15 to DN3000). Custom drawing-based forgings are produced daily.
Every lot ships with an EN 10204 3.1 Mill Test Certificate (3.2 available on request) covering heat number, ladle chemical analysis, mechanical tensile and impact testing, heat-treatment logs, NDT reports, dimensional inspection sheets, certificate of origin, and commercial packing documentation.
Stock forged blanks ship within 7 to 15 days after final CNC machining. Custom forged-to-order and clad bimetallic flanges normally require 20 to 35 days depending on alloy raw material availability and heat treatment cycles. Flexible low MOQ is supported for project trials and engineering stock replenishment.
Explore additional precision-machined slip-on, blind, socket weld, and expansion joint flanges available for global export.
Bypass intermediary trading desks. Speak directly with Shanxi Yuxin's forging specialists and export engineers.
Shanxi Yuxin Casting & Forging Co., Ltd.
Zhuangli Enclave Industrial Zone, Dingxiang County, Shanxi Province, China.
Office Phone: +86-350-6071768
Mobile / WhatsApp: +86 150 3443 1989
Engineering Desk: [email protected]
Factory Direct: [email protected]
