Shanxi Jianing Forging produces a full range of flanges, including plate-type flat welding, neck butt welding, stainless steel, carbon steel, wind turbine tower tubes, pressure vessel flanges, blind plates, figure-8 blind plates, and threaded special-shaped flanges, all customizable with multiple sealing surface types, and a full set of production qualifications for stable supply.
In industrial pipeline connections involving high temperature, high pressure, and strong corrosion, common standard flanges often leak frequently due to insufficient wall thickness or inadequate sealing precision. Frequent replacement not only raises maintenance costs but also threatens on-site safety. Jianing's large-diameter flanges use an integrated forging forming process, allowing full control from raw materials to finished products, improving deformation and sealing challenges in large-dia
In industrial pipeline connections involving high temperature, high pressure, and strong corrosion, common standard flanges often leak frequently due to insufficient wall thickness or inadequate sealing precision. Frequent replacement not only raises maintenance costs but also threatens on-site safety. Jianing's large-diameter flanges use an integrated forging forming process, allowing full control from raw materials to finished products, improving deformation and sealing challenges in large-diameter pipeline connections.
This product is made from carbon steel, alloy steel, or stainless steel, processed through multiple forging processes to produce large-diameter flanges and large forged flange plates. The product outer diameter range covers DN200 to DN6000, suitable for heavy-duty pipeline systems in industries such as petrochemicals, electric power, shipbuilding, and metallurgy. Jianing Forging owns tens of thousands of tons of presses and CNC vertical lathes, capable of processing according to GB, HG, JB, ANSI, DIN standards or drawing orders, providing one-stop supply from blanks to precision machining.
Integral forging forming: Select high-quality steel ingots or billets, undergo upsetting, punching, reaming, and ring grinding processes to eliminate internal looseness, achieve dense fiber streamlines, and stabilize mechanical properties.
High dimensional accuracy: CNC lathes and machining centers are precision machined, with sealing surface roughness reaching Ra1.6μm, helping to eliminate leakage after installation.
Wide range of operating conditions: can withstand temperatures of -196°C~650°C and Class 150~Class 2500 pressure levels, suitable for corrosive media such as acids, alkalis, and salts.
Non-standard customization flexibility: supports custom structures such as shaped holes, thickened walls, and special bevels to meet on-site renovation or special connection needs.
Large-diameter flanges are non-standard custom products, and their price is influenced by factors such as material, specifications, quantity, and processing precision. Jianing Forging provides one-on-one technical coordination and provides customized quotation plans based on drawings or working condition requirements. Please provide parameters such as flange outer diameter, inner diameter, thickness, number of bolt holes and hole diameter, or send drawings directly. We will respond with a preliminary quotation within 2 hours.
Quality Support: Each batch of products is provided with material reports, mechanical performance reports, and flaw detection reports, and third-party testing can be provided upon request.
Controllable delivery times: Own forging workshop and heat treatment line; batch order delivery dates can be negotiated, urgent parts can be expedited and scheduled.
Worry-free after-sales: If products have quality issues, they can be returned or exchanged unconditionally, and technical staff can assist with installation and commissioning on site.
| Parameter items | Parameter content |
|---|---|
| Nominal diameter (DN) | 200~6000 mm |
| Pressure rating | PN6~PN160 / Class150~Class2500 |
| Material | Carbon steel (A105, Q345E), alloy steel (12Cr1MoV, 15CrMo), stainless steel (304, 316L, 321, 904L) |
| Implement standards | GB/T 9119, GB/T 9124, HG/T 20592, JB/T 4701, ANSI B16.5, DIN 2633, etc |
| Sealing surface type | Flat (FF), Raised Surface (RF), Concave-Convex Surface (MFM), Groove Surface (TG), Ring Connection Surface (RJ) |
| Machining accuracy | Sealing surface roughness is ≤ Ra1.6μm, bolt hole center circle deviation is ±0.5mm |
| Detection methods | Ultrasonic flaw detection, magnetic particle testing, and penetrant testing can also provide hydrostatic testing |
| Packaging and transportation | Packaged in wooden crates or tied with steel straps, we can handle logistics services nationwide and at ports |
