Weld Neck Flange
High-Pressure Butt Weld Flanges | Carbon Steel | ASME B16.5
Designed for high temp & high pressure piping, the weld neck pipe flange with tapered hub ensures stable leakproof butt welding.
As a reliable flange supplier, Pengrun offers a large selection of flanges made from carbon steel, stainless steel, duplex stainless steel, alloy steel, and special steels. Our standard weldneck flange strictly follows ASME B16.5 specs.
Core Advantages of Pengrun Weld Neck Flanges
Stress-reducing tapered hub
Leakproof full butt weld
Five types of sealing surfaces available
For high pressure & temp
Multiple material options
Products Category
Industries
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Weld Neck Flange: Tapered Hub & Matching Bevel
The flange features a tapered hub with a pre-machined bevel that aligns perfectly with the pipe end, forming a V-shaped groove for welding. This configuration facilitates a uniform circumferential weld, creating a continuous metal transition that minimizes flow restriction. Each weld undergoes rigorous inspection to certify structural integrity and ensure a defect-free, pressure-tight connection.
Long Weld Neck vs Standard Weld Neck
Long Weld Neck Flange | Standard Weld Neck Flange |
Straight extended hub | Tapered short hub |
For pressure vessel nozzles | For pipeline connections |
Custom length & thickness | Standard fixed dimensions |
Square cut end | Beveled end for pipe welding |
Applications of Weld Neck Flanges
OIL & GAS TRANSMISSION
High-pressure gathering & trunk line connections
PETROCHEMICAL REFINERY
High-temperature process pipeline connections
POWER GENERATION
Steam & high-pressure water system piping
OFFSHORE ENGINEERING
Subsea & offshore platform critical piping
CHEMICAL PROCESSING
Corrosive medium high-pressure lines
HIGH-PRESSURE BOILER
Boiler main steam pipeline connections
