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STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
Specifications
Brand Name :
YUHONG
Model Number :
ASTM A105, ASTM A 182, GR F1, F11, F22, F5, F9, F91, A182 F 304, 304L, 304H, 316, 316L,321
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
1PC
Payment Terms :
L/C, T/T
Delivery Time :
7DAYS
Packaging Details :
PLYWOOD CASE,BUNDLE,PALLET
TYPE :
SORF,SOFF,WNRF,WNFF,BLIND,LWNRF
MATERIAL :
F321
PACKAGE :
PLYWOOD CASE,PALLET
SIZE :
1/2"--98"
CLASS :
150LBS, 300LBS, 600LBS, 900LBS, 1500LBS, 3000LBS, 5000LBS, 10000LBS, 15000LBS
NDT :
UT,PT
Description

STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300

A Long Neck Flange (also known as Long Weld Neck Flange or LWN Flange) is a specialized type of flange designed for high-pressure and high-temperature applications. It has a long, tapered neck that gradually transitions from the flange thickness to the pipe or vessel wall thickness.

Key Features:

Feature Description
Extended Neck Long tapered hub provides reinforcement and reduces stress at the weld point.
Welded Connection Typically butt-welded to the piping system or pressure vessel.
Integral Reinforcement Neck acts like a nozzle, improving strength in pressure vessels.

Advantages:

  1. Smooth Stress Distribution:
    The long tapered hub reduces stress concentration between flange and pipe/vessel.

  2. Ideal for Pressure Vessels:
    Commonly used where nozzles connect to tanks or pressure vessels.

  3. High Strength:
    Suitable for high-pressure and cyclical loading conditions.

  4. Good Weldability:
    Allows for full-penetration butt welds for structural integrity.

Common Standards:

  • ASME B16.5 (for standard sizes)

  • ASME B16.47 (for larger diameters)

  • Custom dimensions for vessel nozzles (often matched to vessel design)

Industry Use Case
Petrochemical / Oil & Gas Nozzles on pressure vessels and heat exchangers.
Power Plants High-pressure steam, feedwater, and process lines.
Chemical Industry Corrosive and high-temperature fluid handling.
Offshore Platforms High-stress piping systems.

Key Features of F321:

  1. Titanium Stabilized:

    • Prevents sensitization (carbide precipitation at grain boundaries) during welding.

    • Makes it superior to 304 in welded structures exposed to temps between 425–870°C (800–1600°F).

  2. High Temperature Resistance:

    • Good creep strength and oxidation resistance up to ~900°C (1650°F).

  3. Good Mechanical Properties:

    • Similar strength to 304 and 316, with added stability for high-heat applications.

  4. Corrosion Resistance:

    • Comparable to 304 in most environments, but better for high-temperature aqueous environments.

STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300

Product tags

dn15-dn2000 stainless steel pipe flange

,

dn50 pn10 steel flange

,

a105 alloy steel flange
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STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300

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Product Detail
Brand Name :
YUHONG
Model Number :
ASTM A105, ASTM A 182, GR F1, F11, F22, F5, F9, F91, A182 F 304, 304L, 304H, 316, 316L,321
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
1PC
Payment Terms :
L/C, T/T
Contact Supplier
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300
STAINLESS STEEL LONG NECK WNRF FLANGE,A182 F321 B16.5 CLASS 300

Yuhong Group Co.,Ltd

Verified Supplier
13 Years
zhejiang, ningbo
Since 2007
Business Type :
Manufacturer, Distributor/Wholesaler, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Seamless Pipe, Stainless Steel Seamless Tube, Duplex Stainless Steel Pipe
Total Annual :
50M-70M
Employee Number :
50~850
Certification Level :
Verified Supplier
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