Lap Joint Flanges
Used with stub ends where frequent dismantling or dissimilar-metal isolation is needed; keeps the costly alloy in the stub end only.
ASME B16.5 · Class 150–900 · A105 / 304L / 316L
Flange Factory Since 1992 Forged Flanges Direct
Forged Flanges Direct
From The Source Mill
ASME, EN, DIN and JIS flanges forged, heat-treated and machined in-house — with EN 10204 3.1B certification on every batch.
Engineered Connections
High-Strength Pipeline
Flange Solutions
Built for oil & gas, petrochemical and marine service: controlled grain flow, anti-corrosion coating options and full traceability.
Global Distributor Partner
33 Years of Precision
Forging Experience
10,000 tons of annual flange capacity and non-standard machining support for stockists, OEMs and EPC contractors worldwide.
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Years
Continuous forging experience since 1992
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Tons / Year
Annual flange output capacity
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Tons / Year
Forged components & ring forgings
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Response
Technical reply from our engineering desk
Dingxiang“The Hometown of Forging in China” — our home base since 1992
About YUXIN A Real Forging Mill,
A Real Forging Mill,
Not A Trading Desk
Shanxi Yuxin Casting & Forging Co., Ltd. was founded in 1992 in the Zhuangli Enclave Industrial Zone of Dingxiang County, Shanxi — the cluster that produces a large share of the world's forged flanges. Billet cutting, open-die and press forging, normalising and tempering, CNC turning and drilling all happen under our own roof, which is why we can control heat numbers, dimensions and delivery dates instead of chasing them.
Buyers work with us for three reasons: documentation that passes third-party inspection, drawing-based manufacturing for non-standard sizes, and an export team that speaks the language of stockists and EPC procurement.
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Audited Quality System
ISO 9001 quality system, TUV-audited processes, AD-Merkblatt W0/TRD 100 and PED compliance with 3.1B certificates.
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Custom & Non-Standard
Flanges forged from your drawing, sample or ASME/EN datasheet, including oversized and special-facing items.
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Export-Ready Logistics
Seaworthy wooden cases or steel pallets, FOB/CIF/DDP terms and complete export documentation packs.
Hot Products
All Products → Forged Flanges & Machined Forgings
From DN15 hand-fit fittings to 2500 lb weld neck flanges and heat-exchanger tube sheets — machined to face finish, checked by heat number, packed for the port.
Socket Weld Flanges
Small-bore, high-pressure service where a smooth bore and strong fatigue resistance matter — common in hydraulic and steam lines.
½"–4" · Class 150–1500 · RF / RTJ facing
Plain Flange
Flat-face plate and forged plain flanges for water, HVAC and low-pressure utility systems — the volume workhorse for distributors.
PN6–PN40 · EN 1092-1 Type 01 · Q235B / P250GH
Expansion Joint Flange
Backing and retaining flanges for rubber and metal expansion joints, drilled to your bellows supplier's template.
Drawing-based · Galvanised or epoxy coated
Browse The Full Flange Range
Manufacturing Envelope
What We Can Actually Forge
Before you send an RFQ, check the capability window below. It reflects the equipment on our shop floor — presses, ring rolling mills, normalising furnaces and CNC vertical lathes — not a catalogue copied from a standard.
| Parameter | Capability | Typical Application |
|---|---|---|
| Standards | ASME/ANSI B16.5, B16.47 Series A & B, EN 1092-1, DIN 2631–2638, JIS B2220, GOST, BS 4504 | Global EPC, stockist and OEM programmes |
| Size range | DN15 – DN3000 (½" – 120"), ring forgings up to 3,000 mm OD | Utility lines through to vessel nozzles |
| Pressure rating | Class 150 / 300 / 600 / 900 / 1500 / 2500; PN6 – PN400 | Low-pressure water to high-pressure hydrocarbon |
| Carbon & alloy steel | A105, Q235B, C22.8, P250GH, 16Mn, A350 LF2, A182 F5 / F11 / F22 | Oil & gas, power, refinery service |
| Stainless & duplex | 304 / 304L, 316 / 316L, 321, A182 F51 / F53 | Chemical, food, marine and desalination |
| Facing types | RF, FF, RTJ, MFM, TG, lap joint; serrated or spiral finish per Ra request | Gasket-specific sealing requirements |
| Heat treatment | Normalising, normalising + tempering, quenching + tempering, solution annealing | Mechanical property & impact test compliance |
| Testing & NDT | Chemical analysis, tensile, impact (−46 °C), hardness, UT, MT/PT, PMI, dimensional report | Third-party inspection (SGS, BV, TUV) welcome |
| Certification | EN 10204 / DIN 50049 3.1B MTC, PED, AD-Merkblatt W0 / TRD 100 | European & international customs and QA |
| Surface protection | Black oil, anti-rust varnish, hot-dip galvanising, epoxy or customer-specified paint | Storage, offshore and buried pipelines |
Need something outside this table? Non-standard geometry is routine work for us — send the drawing through the contact page or request the dimensional catalog.
Industry Application
Where Our Flanges Go To Work
Every sector stresses a joint differently. We match material grade, heat treatment and testing scope to the real service condition — vibration, cryogenic temperature, sour gas or heavy shock load.
Oil & Gas Fields
Wellhead and gathering lines: Class 900–2500, RTJ facing, sour-service options.
Heavy Machinery
Forged hubs, rings and connection flanges with controlled grain flow.
Rail & Transit
Fatigue-critical forgings with full traceability and impact testing.
Automotive Lines
Repeat-order machined parts held to tight dimensional tolerance.
Construction Equipment
High shock-load forgings for excavators and hydraulic assemblies.
Our Processes
One Roof, Seven Controlled Steps
Because casting, forging, heat treatment, machining, drilling, stamping and packing all sit inside our own plant, a deviation is caught at the next station — not at your inspection gate.
01
Casting & Billet
Verified heat numbers and billet cutting to calculated forging weight.
02
Forging
Press and ring-rolled forging for continuous grain flow and density.
03
Heat Treatment
Recorded furnace curves for normalising, tempering or solution annealing.
04
Machining
CNC turning of faces, bores and hubs to the specified Ra finish.
05
Drilling
Bolt circles drilled and straddle-checked against the governing standard.
06
Marking
Hard stamping of grade, size, rating, heat number and our logo.
07
Packing
Fumigated cases, steel pallets, VCI wrap and container load plans.
Want The Full Process Sheet?
Download the dimensional and process catalog for your next enquiry.
Request a Catalog → Customized Services
Engineering Support From RFQ To Port
Our export desk works with flange stockists, fabricators and procurement teams every day. That experience is packaged into six services designed to remove the usual overseas-sourcing friction.
Technical Consultation
Our engineers advise on material grade, pressure rating, facing type and the correct standard before the order is placed — reducing rework and rejection risk.
Customization Support
We forge to your drawing, sample or datasheet: special bores, thicker hubs, extra bolt holes, oversized rings and drilling templates for expansion joints.
Clear Commercial Proposals
Itemised specifications, tonnage, packing detail, realistic lead time and Incoterms — written so your purchasing and QA departments can both sign off.
Quality Assurance
Documented QC gates with material certificates, UT/MT reports, hardness and dimensional records; third-party inspection and witness points welcomed.
Logistics Guidance
Container optimisation, seaworthy packing, plus commercial invoice, packing list, MTC and certificate of origin prepared for smooth customs clearance.
Samples & Trial Batches
Sample flanges and low-MOQ trial lots for evaluation, so new distributor partners can validate quality before committing to container volumes.
Honour & Qualification
Certificates That Survive Audits
To compete in regulated markets we built a formal quality assurance system early. Our processes are approved to ISO 9001 and audited by TUV CERT, with manufacturing according to AD-Merkblatt W0 / TRD 100 and PED, and material certification to DIN 50049 / EN 10204 3.1B.
- ISO 9001 quality management system, process-audited by TUV CERT.
- Manufacturing per AD-Merkblatt W0 / TRD 100 and PED requirements.
- Material certification to DIN 50049 / EN 10204 3.1B on every heat.
- VD350 and VD399-3 certificates for European customer programmes.
- Special equipment manufacturing licence and type test certificate.
- High-tech enterprise and Shanxi “specialised & new” SME recognition.
Our Partners
Trusted By Global Stockists
Long-running supply relationships with international pipe and flange distributors, energy groups and industrial traders — several of them running for more than a decade.
Ready To Revolutionize Your Projects?
Send your flange list, drawing or standard reference. Our engineering desk replies within 24 hours with material options, realistic lead time and packing proposal.
Latest News
Read The Blog → From The Factory Floor
Strong Cooperation Intentions At Tube 2026, Düsseldorf
In-depth exchanges with professional buyers on flange technology, market demand and long-term supply planning — with very positive partner feedback.
Read more →
Invitation: Tube 2026 International Tube & Pipe Trade Fair
Meet our flange R&D and export team in person to review the latest products, machining capability and industry insight.
Read more →
Forging Decades Of Trust With Manfred Geldbach Flansch und Fitting GmbH
More than ten years of continuous supply — a working example of what consistent documentation and on-time delivery build over time.
Read more → Buyer FAQ
Answers Before You Enquire
The four questions overseas purchasers ask us most often. If your project needs something more specific, our engineers are one message away.
Ask Our Engineers →Which flange standards can YUXIN manufacture to?
ASME/ANSI B16.5 and B16.47 (Series A & B), EN 1092-1, DIN 2631–2638, JIS B2220, GOST and BS 4504, in pressure classes from 150 lb to 2500 lb and PN6 to PN400. Non-standard flanges from your drawing are produced routinely.
What documentation ships with each order?
Every batch carries an EN 10204 / DIN 50049 3.1B mill test certificate with heat number, chemical composition, mechanical properties and heat-treatment record. Ultrasonic testing, PMI, hardness, impact and dimensional reports are available on request, together with commercial invoice, packing list and certificate of origin.
What is the minimum order quantity and lead time?
Standard carbon steel items in common sizes ship in about 7–15 days. Forged-to-order and non-standard flanges usually need 25–35 days, depending on size, material availability and the heat-treatment cycle. Low-MOQ trial orders are accepted for new distributor partners.
Which materials do you forge?
Carbon steel (A105, Q235B, C22.8, P250GH), low-temperature and alloy steel (A350 LF2, A182 F5/F11/F22, 16Mn), stainless steel (304/304L, 316/316L, 321), duplex (F51/F53) and nickel alloys on a project basis.
Contact Us
Talk To The Mill Directly
No layers of agents. Your specification goes straight to the people who schedule the presses, furnaces and lathes. Technical consultation is available 24/7 for international time zones.
- Factory AddressZhuangli Enclave Industrial Zone, Dingxiang County, Shanxi, China
- Phone / WhatsApp +86-350-6071768 +86 150 3443 1989
- Response TimeTechnical reply within 24 hours, Monday to Sunday
