Precision-machined flanged fittings engineered for severe pressure, temperature, and corrosive pipeline operations globally.
Established in 1992 in the Zhuangli Enclave Industrial Zone, Dingxiang County, Shanxi Province—widely recognized as the “Hometown of Forging in China”—Shanxi Yuxin Casting & Forging Co., Ltd. operates an integrated 10,000 t/year manufacturing infrastructure dedicated to industrial forged flanges and specialized components.
Our plant holds formal quality management audits by TÜV CERT under ISO 9001:2015, Pressure Equipment Directive (PED 2014/68/EU), AD 2000-Merkblatt W0 / TRD 100, and VdTÜV 350/399-3 approvals. Full material traceability is certified per EN 10204 3.1 and 3.2 inspection protocols.
Exporting to over 40 countries across Europe, the Middle East, Southeast Asia, and the Americas. Yuxin provides OEM manufacturing for top engineering brands, stockists, and EPC contractors, assuring compliant packaging and rapid clearance documentation.
Flanged carbon steel connections are the structural backbone of critical energy, chemical, and transportation infrastructures. Discover our engineered deployment profiles.
High-pressure distillation columns, hydrocrackers, and catalytic cracking units demand ASTM A105 / A105N forged weld neck and blind flanges. Our metallurgical controls prevent hydrogen-induced cracking (HIC) and sulfide stress cracking (SSC) in sour service environments, complying strictly with NACE MR0175 / ISO 15156 standards.
Boiler feed systems, steam headers, and cooling circuits utilize Yuxin's heavy-section tube sheets and high-yield carbon steel flanges (such as ASTM A350 LF2 Class 1/2 for sub-zero impact resilience). Designed for thermal shock resistance and low-creep behavior under severe thermal cycling up to 450°C.
In ballast lines, fuel transfer systems, and offshore rig piping, flanged connections must resist vibration fatigue and atmospheric marine oxidation. We supply hot-dip galvanized and specialized anti-corrosion painted EN 1092-1 Type 01, Type 11, and ASME B16.5 Slip-On flanges audited for marine class societies.
Custom forged rings, stub ends, socket weld flanges, and expansion joint flanges engineered to absorb intense dynamic pressure spikes, water hammer, and mechanical flexure in high-capacity excavators, hydraulic presses, and heavy industrial machinery.
With gas permeability posing zero-tolerance challenges, our ultra-dense closed-die forging process eliminates micro-porosity. Precision-machined Ring Type Joint (RTJ) faces guarantee absolute seal integrity for gaseous hydrogen transmission pipelines up to Class 2500 / PN400.
Located inside Shanxi's primary raw steel and metallurgical cluster, Yuxin merges structural supply chain advantages with automated Industry 4.0 forging technology.
Information Gain Insight: Unlike standard trading entities, a genuine forging mill controls grain flow orientation during hot deformation. Yuxin's ring-rolling and die-forging processes align carbon steel internal microstructures along stress vectors, yielding 25% higher tensile tough strength compared to flame-cut plate flanges.
Proximity to Shanxi's premium steel producers grants immediate access to certified carbon steel round billets (ASTM A105, Q235B, 20#, A350 LF2, 16Mn). Raw material heats are pre-screened for chemical purity (C, Mn, Si, P, S limits) before entering production.
Controlled thermal processing furnaces ensure complete stress relief, grain refinement, and mechanical normalization. Temperature curves are digitally recorded for every heat batch to achieve consistent hardness (HBW 137-187 for ASTM A105).
Flange faces (Raised Face RF, Flat Face FF, Ring Type Joint RTJ) are turned on multi-axis CNC lathes to match exact surface finish roughness requirements (AARH 125-250 µin stock finish or smooth finish 63-125 µin).
Quick reference specification guide for engineering specifiers, procurement officers, and piping system designers.
| Standard System | Flange Types | Nominal Size Range | Pressure Class / Ratings | Material Specifications | Facing Finishes |
|---|---|---|---|---|---|
| ASME / ANSI B16.5 | Weld Neck (WN), Slip-On (SO), Blind (BL), Socket Weld (SW), Threaded (TH), Lap Joint (LJ) | ½" to 24" (DN15 - DN600) | Class 150, 300, 400, 600, 900, 1500, 2500 lbs | ASTM A105 / A105N, ASTM A350 LF2 Cl 1/2, ASTM A694 F42-F70 | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint), T&G |
| ASME B16.47 Series A / B | Large Diameter Weld Neck (WN), Blind (BL) Flanges | 26" to 60" (DN650 - DN1500) | Class 75, 150, 300, 400, 600, 900 lbs | ASTM A105N, A350 LF2, High-Yield Carbon Steel A694 | Raised Face (RF), Ring Type Joint (RTJ) |
| EN 1092-1 / DIN | Type 01 (Plate), Type 02 (Loose), Type 05 (Blind), Type 11 (Weld Neck), Type 12 (Hubbed Slip-On) | DN10 to DN3000 (Up to 120") | PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100 | P235GH, P245GH, P280GH, S235JR, P355NH, C22.8 | Form A (Flat), Form B1/B2 (Raised), Form C/D (Tongue/Groove), Form E/F |
| JIS B2220 / GOST 12820 | SOP (Slip-On Plate), SOH (Hubbed), WN (Welding Neck), BL (Blind) | 10A to 1500A / DN10 to DN1200 | 5K, 10K, 16K, 20K, 30K / PN6 to PN100 | SS400, SF440A, Carbon Steel 20#, CT.3sp | Smooth Plane, Raised Face, Male-Female |
| Custom / Drawing-Based | Tube Sheets, Heavy Ring Forgings, Expansion Joint Flanges, Reducer Flanges | Up to Ø3,000 mm Outer Diameter | Custom Hydro-static test pressure up to 60 MPa | Carbon Steel, Low-Alloy Steel, Clad Steel (Carbon + Stainless/Inconel) | Precision CNC Grooved, Serrated (125-250 AARH), O-ring recessed |
Evaluating Total Cost of Ownership (TCO) beyond FOB unit prices. How Shanxi Yuxin minimizes supply chain risk for global buyers.
Global EPCs demand rigorous vendor verification. Yuxin welcomes third-party inspection agencies including SGS, TÜV, BV, DNV, and Lloyd's Register for witness testing. Non-Destructive Testing (NDT) capabilities include Ultrasonic Testing (UT), Magnetic Particle Inspection (MT), Liquid Penetrant Testing (PT), and Positive Material Identification (PMI).
With an annual forging output exceeding 10,000 tons and extensive raw billet safety stock, we protect project schedules from raw metal price swings and material shortages. Standard stock items ship within 7–15 days; custom forged orders complete within 20–35 days.
Export packaging features multi-stage preservation: black rust-preventive varnish, yellow anti-rust coating, transparent varnish, or hot-dip galvanizing. Flange faces are shielded with heavy plastic end caps, vacuum-wrapped in VCI foil, and loaded into fumigation-free ISPM-15 compliant plywood cases or steel-framed crates.
Positioning flanged connection technology for decarbonization, ultra-high-pressure applications, and smart pipeline monitoring.
Integrating 3D FEA numerical simulation software to model metal deformation, temperature distribution, and strain rates during hot die forging. This eliminates internal folding, optimizes grain boundary layout, and guarantees zero internal micro-voids prior to physical production.
Transitioning plant heating infrastructure toward low-emission natural gas and hydrogen-blend induction heating. Reducing carbon intensity in carbon steel manufacturing ensures our global buyers comply with EU Carbon Border Adjustment Mechanism (CBAM) regulations.
Embedding high-temperature RFID micro-chips and QR heat codes directly into flange rims. Field engineers can scan the flange on-site to instantly retrieve digital MTC EN 10204 3.1 certificates, chemical compositions, tightening torque limits, and maintenance history.
Seamless compliance for regional pressure equipment standards across North America, Europe, the Middle East, and Asia.
Certified pressure equipment component manufacturer under EU regulations. Certified AD 2000-W0 approval permits immediate deployment in German and European chemical processing plants.
Designed and manufactured per ASME B16.5 / B16.47 standards. Support for Canadian Registration Number (CRN) documentation across all provinces for pressure vessel installations.
Full compliance with TR CU 032/2013 regulatory certification for safety of pressure equipment exported to Russia, Kazakhstan, and Eurasian Economic Union markets.
Manufacturing capabilities aligned with Saudi Aramco Materials System Specifications (SAMSS) and SABIC engineering standards for oilfield and petrochemical headers.
Select from our certified range of specialized connection fittings, tube sheets, and custom CNC blind flanges.
In-depth answers addressing metallurgical standards, pressure ratings, custom engineering, and procurement logistics.
The standard material grades for carbon steel flanged fittings include:
The "N" suffix designates Normalized heat treatment. While standard ASTM A105 permits as-forged condition for Class 150 and Class 300 flanges under 4 inches, ASTM A105N requires heat treatment via full annealing, normalizing, or normalizing plus tempering. Normalizing refines the microstructural grain size, improves impact resistance at lower temperatures, and is mandatory for higher pressure classes (Class 600+) and critical chemical or refinery services.
Every raw billet entering our factory is assigned a unique tracking heat number. This heat number is die-stamped onto the outer rim of each flange during production. A corresponding EN 10204 3.1 Mill Test Certificate (MTC) is generated, detailing the exact chemical composition (spectral analysis), tensile strength, yield strength, elongation, Charpy V-notch impact values, and Brinell hardness. Independent 3.2 certification can be issued with third-party inspection (SGS/TÜV/BV) sign-offs.
Choose a Weld Neck flange for high-pressure (Class 600 and above), high-temperature, cyclic loading, or sub-zero conditions. The tapered hub provides gradual stress transfer into the pipe wall and permits 100% radiographic inspection of the butt-weld joint. Choose a Slip-On flange for lower-pressure utility applications (Class 150/300) where lower initial material cost and easier field alignment are prioritized, though double fillet welding is required.
We machine flange facings to exact standard specifications:
Yes. Over 20% of our production volume consists of custom-engineered forgings, including heavy tube sheets for heat exchangers, large-diameter forged rings up to Ø3,000 mm, custom expansion joint flanges, and reducer flanges. Send your DWG, STEP, or PDF drawings to our engineering office at [email protected] for a 24-hour feasibility review and quote.
We maintain an extensive stock of standard forged blanks in ANSI Class 150–600 and EN PN10–PN40. Standard machined flanges can ship within 7 to 15 days. For customized or large-diameter forged orders, lead time ranges from 20 to 35 days depending on thermal treatment cycles. Low MOQ is accepted for trial orders and distributor stock replenishment.
