Explore our premium factory-direct ANSI class flanges manufactured under strict ISO 9001 and PED 2014/68/EU guidelines with full EN 10204 3.1 material traceability.
In high-pressure piping infrastructure, flange integrity dictates operational safety, environmental containment, and facility lifecycle cost. Shanxi Yuxin Casting & Forging Co., Ltd. brings over three decades of forging excellence to global procurement engineering.
ANSI (American National Standards Institute) and ASME (American Society of Mechanical Engineers) standards define the pressure-temperature ratings, tolerances, marking, and testing for pipe flanges. Sizes ranging from 1/2" to 24" fall under ASME B16.5, while larger diameter pipelines from 26" to 60" conform to ASME B16.47 (Series A & Series B). Shanxi Yuxin precision forgings adhere strictly to these dimensions to prevent gasket blowout, bolt elongation, and flanged connection creep.
Unlike cast flanges which suffer from internal porosity, micro-segregation, and shrinkage voids, Shanxi Yuxin's forged ANSI class flanges undergo dynamic plastic deformation. Heavy-duty hydraulic presses align the grain structure along the directional stresses of the flange hub and ring. This yields exceptional impact toughness at sub-zero temperatures (tested down to -196°C for cryogenic service) and resistance to stress corrosion cracking (SCC).
SEO Information Gain Insight: Selecting "Discount" flanges does not mean compromising on alloy chemistry or mechanical yield strength. By locating our primary forging facilities in Dingxiang County, Shanxi—China's recognized capital of forging—Yuxin leverages localized raw material supply chains, integrated clean-energy forging kilns, and high-efficiency CNC turning cells to deliver cost advantages of 15%–30% directly to international EPC contractors without altering steel chemical purity.
A granular breakdown of mechanical properties, material grades, facing types, and pressure ratings supplied across global industrial applications.
| ANSI / ASME Class | Nominal Pressure (PSI / Bar) | Common Flange Types | Material Specifications | Facing Types |
|---|---|---|---|---|
| Class 150 | 285 PSI @ 100°F (19.6 Bar) | Weld Neck, Slip-On, Blind, Threaded | ASTM A105, A350 LF2, A182 F304/F316L | Raised Face (RF), Flat Face (FF) |
| Class 300 | 740 PSI @ 100°F (51.1 Bar) | Weld Neck, Socket Weld, Lap Joint | ASTM A105N, A182 F11, F22, F51 Duplex | Raised Face (RF), Ring Type Joint (RTJ) |
| Class 600 | 1480 PSI @ 100°F (102.1 Bar) | Weld Neck, High Integrity Blind | ASTM A182 F53 Super Duplex, F91 Alloy | Ring Type Joint (RTJ), Tongue & Groove |
| Class 900 & 1500 | 2220 - 3705 PSI @ 100°F | Heavy Hub Weld Neck, Custom Rings | Inconel 625 Clad, Monel 400, ASTM A350 LF3 | RTJ Male/Female, Serrated 125-250 AARH |
| Class 2500 | 6170 PSI @ 100°F (425.5 Bar) | Ultra-High Pressure Weld Neck, Blind | Forged Alloy Steel, Hastelloy C276, F316Ti | Specialized RTJ Ring Grooves (API 6A) |
Custom-engineered ANSI class flange solutions designed to operate reliably in severe environmental conditions across heavy process industries.
For sour service environments containing wet H₂S and CO₂, YUXIN manufactures ANSI Class 600 through 2500 Weld Neck and RTJ flanges meeting NACE MR0175 / ISO 15156 standards. We utilize full-grain forging techniques to eliminate hydrogen-induced cracking (HIC) and sulfide stress cracking (SSC).
High-temperature fossil fuel, nuclear, and concentrated solar power plants demand chrome-moly alloy flanges (ASTM A182 F11, F22, F91). Our thermal treatment lines feature fully automated normalizing and tempering routines that optimize creep-rupture life at service temperatures exceeding 560°C.
As the global energy sector pivots toward clean hydrogen and Carbon Capture, Utilization, and Storage (CCUS), flanged joints must prevent micro-gaseous leakage. YUXIN supplies precision CNC mirror-machined flange faces and custom tube sheets for electrolyzers and cryogenic storage units.
Combining modern industrial automation with Shanxi’s rich forging heritage to optimize production speed, quality control, and cost competitiveness.
Shanxi Yuxin operates advanced closed-die forging presses up to 6,000 tons alongside computerized ring-rolling machinery capable of seamless ring production up to 3,000 mm in diameter. Automated temperature sensors monitor billet induction heating, keeping thermal variances within ±5°C for identical batch grain density.
Every ANSI class flange is finished on high-precision multi-axis CNC lathes. Bolt circle diameters, flange thickness, and gasket surface serrations (spiral or concentric 125–250 µin AARH finish) are verified using 3D Coordinate Measuring Machines (CMM) and optical emission spectrometers (PMI testing) before shipment.
Supply Chain Mitigation: Located within the Dingxiang industrial cluster, Yuxin holds direct raw-material supply contracts with premier Chinese steel mills (Baosteel, TISCO). This ensures guaranteed steel billet availability, short production lead times (7–15 days for standard stock, 20–35 days for custom forgings), and full insulation from global raw-material price volatility.
Streamlining international procurement workflows for EPC contractors, stockists, and industrial plant owners worldwide.
Eliminate middleman markups. Buying direct from our Shanxi manufacturing site provides transparent cost structures, enabling EPCs to win competitive tenders while maintaining strict engineering margins.
Every order is accompanied by detailed documentation: EN 10204 3.1 Mill Test Certificates, NDT test reports (UT, MT, PT), heat treatment charts, dimensional inspection records, Certificate of Origin, and packing lists.
Flange faces are coated with anti-rust oil or transparent varnish, fitted with hard plastic caps, and secured in fumigation-free ISPM-15 compliant plywood crates or steel-banded pallets designed for rough ocean freight transit.
Meeting international engineering standards and regional regulatory requirements for seamless project integration.
Shanxi Yuxin maintains an audited quality management framework compliant with ISO 9001:2015, European Pressure Equipment Directive (PED 2014/68/EU), AD 2000-Merkblatt W0, and Canadian Registration Number (CRN) standards. Third-party inspection agencies such as SGS, TÜV, Lloyd's Register, and Bureau Veritas regularly witness our testing processes on customer request.
Our dedicated international sales team offers round-the-clock technical assistance in English, German, Spanish, and Russian. From custom flange drawing reviews (DWG/STEP files) to non-standard sizing calculations, our engineers ensure project compliance prior to manufacturing release.
Pioneering Next-Generation Flange Manufacturing through Advanced Metallurgy, Digital Twins, and Decarbonized Production.
YUXIN is integrating QR-code digital twin identifiers directly into flange outer rims. Scanning the laser-etched code yields instant verification of raw billet chemistry, heat treatment history, ultrasonic test logs, and EN 10204 3.1/3.2 certificates secured on a tamper-proof digital ledger.
To support high-temperature thermal energy storage and deep sea drilling beyond 3,000 meters, YUXIN R&D is engineering High-Entropy Alloy (HEA) flange compositions and laser-cladded Inconel 625 facing seals for zero micro-pitting performance.
Aligning with global ESG mandates, our Shanxi facilities are transitioning to green electric induction furnaces powered by regional wind and solar grids, targeting a 45% reduction in embedded carbon per ton of finished forged steel by 2030.
Expert insights into common technical questions surrounding ANSI class flanges, material selection, testing standards, and order logistics.
Explore our complete catalog of precision CNC-machined forged products tailored for global industrial supply chains.
