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.
Frequent leaks, insufficient pressure resistance, or installation difficulties at pipeline connections? Traditional flanges are prone to deformation under high temperature and high pressure conditions, leading to sealing failure and persistently high maintenance costs. Jianing Forging's neck-butt welded flange uses an integrated forging process to fundamentally solve issues of weak pressure resistance and sealing, making the pipeline system operation more stable.
Frequent leaks, insufficient pressure resistance, or installation difficulties at pipeline connections? Traditional flanges are prone to deformation under high temperature and high pressure conditions, leading to sealing failure and persistently high maintenance costs. Jianing Forging's neck-butt welded flange uses an integrated forging process to fundamentally solve issues of weak pressure resistance and sealing, making the pipeline system operation more stable.
Necked butt weld flanges are pipeline connectors specially designed for high pressure, high temperature, and harsh working conditions. Jianing Forging selects high-quality carbon steel or alloy steel billets and, through full-process forging, finishing, and heat treatment, ensures more uniform stress distribution between the flange neck and the butt weld of the pipe. Our products are widely used in petroleum, chemical, power, metallurgy, and other fields, and can adapt to standards such as ANSI, DIN, JIS, GB, meeting the stringent requirements of various pipeline systems.
Integral forging, dense structure: using steel ingots or round steel heated to form the whole die forging, with continuous and complete metal flow lines, no casting defects, and better pressure resistance than cast flanges.
Fine sealing surface processing: The sealing surface is CNC turned, with a surface roughness ≤Ra3.2μm, and together with gaskets, ensures reliable sealing and reduces leakage risk.
Multiple materials available: carbon steel (20#, Q235), alloy steel (16Mn, 15CrMo), stainless steel (304, 316L) can be selected according to the medium and temperature, meeting corrosive and high-temperature conditions.
Strong adaptability: The interface end is machined with a groove, meeting welding standards and allowing for quick butt welding to pipes, saving on-site installation time.
Necked butt welding flanges are customized products, with prices calculated comprehensively based on material, specifications, pressure rating, quantity, and surface treatment requirements. Jianing Forging provides one-on-one technical communication and provides a relatively accurate quotation after confirming drawings or parameters. Inquiries are welcome to obtain exclusive solutions.
Quality support: Each batch comes with material reports and certificates of conformity, allowing traceability of raw material sources.
On-time delivery: production is scheduled according to orders, standard specifications ship within 7-15 working days, expedited orders negotiable.
Worry-free after-sales: No human quality issues, returns and exchanges are supported; Providing technical guidance for welding and installation.
Customization support: Custom processing based on drawings and samples, non-standard sizes and special materials can be produced.
| Parameter items | Scope/Description |
|---|---|
| Nominal diameter (DN) | 15mm～600mm（1/2″～24″） |
| Pressure rating | Class 150～2500（PN16～PN420） |
| Sealing surface type | RF (convex surface), FF (full planar), RTJ (ring connection surface), etc |
| Implement standards | HG/T 20592, GB/T 9115, ASME B16.5, EN 1092-1, etc |
