Standard and specialized piping components fabricated under ISO 9001 and PED 2014/68/EU international quality protocols.
An authoritative technical analysis on forged pressure vessel components, high-precision CNC tube sheets, and heavy-gauge sheet metal engineering in Shanxi, China.
"In pressure-critical infrastructure, mechanical integrity cannot be compromised. Shanxi Yuxin Casting & Forging Co., Ltd. integrates raw material melt sourcing, closed-die hammer forging, computerized heat treatment, and precision CNC multi-axis machining within a single ISO 9001 certified ecosystem—eliminating third-party quality risks."
When engineering piping networks for oil & gas offshore platforms, chemical processing plants, or thermal power stations, the connection interface represents the most vulnerable stress concentration point. As a premier China Flange Sheet Metal Manufacturer located in Dingxiang County, Shanxi—internationally recognized as the "Hometown of Forging in China"—Shanxi Yuxin Casting & Forging Co., Ltd. (established in 1992) has refined the science of grain refinement and metallurgical grain flow alignment over three decades.
Unlike cast components or inferior plate-cut flanges that exhibit micro-porosity, internal void structures, and anisotropic weak planes, hot-forged flanges undergo severe plastic deformation. This process compresses the steel billet, aligning its internal grain boundary along the circumferential geometric profile of the flange hub and ring. The resulting component demonstrates superior yield strength, fatigue resistance, and fracture toughness, capable of enduring cyclical thermal expansion and dynamic pressure surges up to ASME Class 2500 and PN400 pressure ratings.
Closed-die radial rolling and hydraulic hammer drop forging align the crystal structure along stress flow lines, raising impact toughness to ≥ 27J at -40°C.
State-of-the-art vertical turning lathes (VTL) and 5-axis CNC machining centers guarantee face flatness tolerances within 0.02mm and surface roughness of 125-250 µin AARH.
Full compliance with European Pressure Equipment Directives, audited by TÜV CERT with AD 2000-Merkblatt W0 and TRD 100 industrial quality endorsements.
Global procurement teams navigating complex industrial supply chains face three persistent challenges: rising raw material volatility, lead time uncertainties, and compliance risks related to heat number material traceability. Partnering directly with a direct Chinese manufacturer like Yuxin provides tangible operational advantages:
Our engineering division manufactures standard flanges to ANSI, ASME, EN, DIN, JIS, GOST, and BS specifications, alongside heavy custom-machined sheet metal tube sheets up to 3,000mm in diameter.
| Flange Family Type | Applicable Standards | Pressure Rating Range | Material Classifications | Core Application Scenarios |
|---|---|---|---|---|
| Weld Neck (WN) | ASME B16.5, B16.47 Ser. A/B, EN 1092-1 Type 11 | Class 150 – 2500 / PN6 – PN400 | Carbon Steel A105/Q235B, Alloy A182 F11/F22, Stainless 304/316L | High-pressure, cyclic stress oil & gas transmission pipelines, refinery vessels. |
| Slip-On (SO) & Plain | ASME B16.5, EN 1092-1 Type 01 / 12, DIN 2576 | Class 150 – 600 / PN6 – PN40 | ASTM A105, S235JR, Stainless Steel 304/304L, 316/316L | Low-pressure cooling lines, HVAC systems, municipal waterworks, process utilities. |
| Blind Flanges (BL) | ASME B16.5, EN 1092-1 Type 05, DIN 2527 | Class 150 – 2500 / PN6 – PN400 | Carbon Steel, Low-Temp Steel A350 LF2, Duplex 2205 / 2507 | Pressure vessel inspection ports, line terminations, subsea manifold isolation. |
| Custom Tube Sheets & Rings | TEMA Standards, ASME Sec VIII, Custom Drawings | Up to 3000 mm Outside Diameter | Forged Plates, Stainless Clad Steel, Monel, Inconel, Titanium Alloys | Shell-and-tube heat exchangers, condensers, boilers, chemical reactors. |
| Lap Joint & Stub Ends | ASME B16.5, MSS SP-43, EN 1092-1 Type 02/33 | Class 150 – 300 / PN10 – PN40 | Carbon Steel Body paired with Stainless / Alloy Stub Ends | Corrosive fluid lines requiring frequent dismantling and bolt realignment. |
Modern industrial equipment demands tight integration between forged structural elements and precision-cut sheet metal assemblies. Shanxi Yuxin Casting & Forging Co., Ltd. has expanded its manufacturing scope beyond standard pipe fittings to encompass high-precision Sheet Metal & CNC Tube Sheet Fabrication.
Our tube sheet manufacturing leverages heavy-duty CNC gantry drilling machines equipped with deep-hole internal cooling tooling. We achieve sub-millimeter pitch concentricity, tight tube-hole tolerances, and smooth groove profiles vital for preventing tube-to-tubesheet joint failure under high thermal stresses. Whether manufacturing baffle plates, shell flanges, or complex expansion joint flanges, our dual capability as both a forging master and heavy sheet metal fabricator optimizes project schedule synchronization for global EPC contractors.
The global metal fabrication landscape is undergoing a technological revolution driven by automation, digital twin modeling, and strict decarbonization mandates. Yuxin remains at the forefront of this industrial transformation:
Tested in the world's most demanding operational environments, from freezing Arctic gas pipelines to high-salinity offshore platforms.
Heavy-wall Weld Neck Flanges and RTJ (Ring Type Joint) ring flanges engineered for high-temperature cracking towers and corrosive hydrocarbon processing streams.
Large-diameter forged tower flanges and subsea piping fittings treated with heavy-duty anti-corrosion epoxy coatings for 30+ year salt-spray durability.
Super-alloy and high-pressure alloy flanges (A182 F11/F22/F91) designed to withstand high-pressure superheated steam loops in modern power boilers.
Custom forged rings, hydraulic cylinder flanges, and wear-resistant machinery components machined to exact client CAD/CAM specifications.
Precision CNC-drilled sheet metal tube sheets, baffle assemblies, and slip-on flanges for shell-and-tube exchangers, chillers, and cooling towers.
Cost-effective flat plain flanges and slip-on flanges manufactured according to EN 1092-1 Type 01 and DIN standards with galvanizing options.
Bulk supply solutions available for worldwide freight forwarding, ocean container shipping, and rapid project replenishment.
How our rigorous Quality Management System guarantees zero-defect deliveries for EPC project managers worldwide.
Every steel heat received from accredited tier-1 steel mills (such as Baosteel, TISCO, or Shougang) undergoes Positive Material Identification (PMI) via XRF spectrometry. We verify carbon equivalents (CE) to guarantee weldability before hot forging commences.
Test coupons forged alongside production batches are subjected to tensile testing, Charpy V-notch impact testing (-40°C), Brinell hardness inspection, and grain size analysis per ASTM E112 to confirm complete heat-treatment efficacy.
Flange bolt-hole pitch circles (PCD), flange thickness, hub diameter, and facing serrations (125-250 AARH concentric or spiral grooves per ASME B16.5) are checked using 3D laser coordinate measuring machines (CMM).
Finished flanges are thoroughly cleaned, dried, and coated with rust-preventive varnish, yellow paint, or hard anti-corrosion oil. Items are capped with plastic end protectors and sealed in fumigation-free plywood cases or heavy steel-banded pallets.
Direct answers from our engineering and export team regarding flange specifications, custom drawings, and lead times.
We forge and machine flanges conforming to ASME B16.5, ASME B16.47 (Series A & B), EN 1092-1, DIN, JIS, GOST, and BS specifications. Pressure ratings span from Class 150 to Class 2500 and PN6 to PN400, covering nominal pipe sizes from 1/2" to 120" (DN15 to DN3000). Custom non-standard components are produced directly from customer CAD drawings.
Every shipment includes an official EN 10204 3.1 Mill Test Certificate detailing steel heat number, chemical composition, tensile/yield strength, elongation, hardness, impact test values, heat treatment batch records, and non-destructive examination (UT/MT) results. EN 10204 3.2 certificates verified by independent third parties (TÜV, SGS, BV, Lloyds) are available upon request.
Our engineering department reviews your DWG, STEP, or PDF drawings for manufacturing feasibility, tolerance compatibility, and material selection. We produce custom die tooling in-house, enabling rapid first-article sample production. CNC gantry drills ensure exact tube-hole pitch layout for complex heat exchanger tube sheets up to 3,000 mm in diameter.
Standard sizes held as semi-finished forged blanks can be machined, coated, and packaged within 7 to 15 days. Dedicated forged-to-order production runs generally require 20 to 35 days depending on material availability and heat treatment requirements. We accommodate flexible low MOQ limits for trial orders, project replenishment, and dealer stock building.
We offer transparent rust-preventive oil, yellow anti-rust varnish, black bitumen paint, hot-dip galvanizing (HDG), electro-galvanizing, electro-polishing for stainless steel grades, and high-performance marine epoxy coatings engineered for aggressive offshore marine environments.
Yes. We welcome third-party inspection agencies such as SGS, TÜV, Bureau Veritas (BV), DNV, or client-appointed quality engineers to perform raw material verification, witness hydrostatic/NDT testing, verify dimensional accuracy, and inspect final packaging at our factory in Dingxiang, Shanxi.
Contact our sales engineering desk today for instant quotation analysis, technical drawing review, or factory audit arrangements. Response guaranteed within 24 hours.
+86-350-6071768
+86 150 3443 1989
Zhuangli Industrial Zone, Dingxiang County, Shanxi, China