A welding neck flange (WN) features a long tapered hub that can be welded with a pipe.
This flange type is used, normally, in high-pressure and high/low temperatures applications that require an unrestricted flow of the fluid conveyed by the piping system (the bore of the flange matches with the bore of the pipe).
The absence of pressure drops prevents negative effects as turbulence and erosion/corrosion of the metals in the proximity of the flanged joints.
The tapered hub allows a smooth distribution of the mechanical stress between the pipe and the weld neck flange and facilitates the execution of radiographic inspections to detect possible leakages and welding defects.
The dimension of the flange (NPS and the pipe schedule) shall match the dimension of the connecting pipe.
Long weld neck flanges (LWN) are similar to weld neck flanges, with the exception that the neck (tapered hub) is extended and acts like a boring extension.
Long weld neck flanges are generally used on vessels, columns or barrels. These flange types are available also in the heavy barrel (HB) and equal barrel (E) types
API 6A Weld Neck Flanges are pipe flanges attach by welding the pipes to the neck of the flanges. This transfers stress from the flange to the pipe instead. It also reduces the stress concentration from the base of the hub. Welding neck flanges remove stress concentration and allow full working pressure and they are often used for high pressure applications. The inside diameter of the flange is designed to match the pipe's inside diameter. Weld neck pipe flanges are typically provided with a raised face, flat face, or RTJ facing.
46676 Welding Flanges Suppliers
Short on time? Let Welding Flanges sellers contact you.
A long weld neck flange LWN flange is a type of flange that has a long tapered neck that extends from the flange face to the pipe This longer neck provides more support to the pipe at the weld joint making it a more robust and reliable connection LWN flanges are typically used in highpressure and hightemperature applications such as in the oil and gas industry
Technical Specifications
Dimensions 12 to 24 in diameter
The neck length is typically 15 to 2 times the flange diameter
Materials Carbon Steel Stainless Steel or Alloy Steel
Pressure ratings 150 psi to 2500 psi
Temperature ratings 200F to 1000F
Types RFFFRTJ
LWN flanges are used in a variety of applications including
Oil and gas industry
Chemical industry
Power generation
Water treatment
HVAC
The benefits of using LWN flanges include
Increased strength and reliability
Longer service life
Wider range of applications
Easier to assemble and disassemble
A weld neck flange is a type of flange that is joined to a piping system by butt welding. The flange consists of a circular fitting with a protruding rim around the circumference. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts. The flange also has a long tapered hub that gradually meets the wall thickness of the pipe or fitting.
Technical Specifications:
Materials: Carbon steel, stainless steel, duplex steel, alloy steel, etc.
Dimensions: 1/2" to 24"
Class range: Class 150 to 2500 (ANSI/ASME B16.5)
Type: RF,FF,RJT
PN range: PN 2.5 to PN 250
Hub length: Short hub (SH), Long hub (LH), Extra long hub (XH)
Finish: Black, mill finish, painted, etc.
Advantages of Weld Neck Flanges:
Increased strength and durability
Reduced stress concentration
Smooth transition from flange thickness to pipe or fitting wall thickness
Easy to radiograph for flaw detection
Can be used in high pressure and high temperature applications
Applications:
Power plants
Chemical plants
Oil and gas industries
Water treatment plants
HVAC systems
Other industrial applications
Welding Neck (WN) FlangeThe Welding Neck (WN) Flange is a flange designed to be welded to a pipe. The flange has a long tapered hub that is welded to the pipe to form a strong, leak-free connection. The flange also has a flat circular plate with bolt holes to secure the flange to another flange or piece of equipment.
Description
A Welding Neck (WN) Flange is a type of flange used in piping systems to connect pipes and equipment together. It is designed to be welded to the pipe or fitting and then bolted to another flange or piece of equipment. The WN flange has a long tapered neck that is welded to the pipe or fitting, and a flat face that extends out from the neck. The flat face of the flange provides a surface for the gasket to seal against, and the bolts are tightened to compress the gasket and create a leak-tight seal. The neck of the WN flange also provides reinforcement to the connection, which makes it suitable for use in high-pressure and high-temperature applications. The tapered design of the neck reduces stress concentrations and distributes the load evenly across the flange, which helps to prevent leaks and failures.
Long-necked flanges, also known as LWN flanges, are similar to the standard weld neck flanges but the neck is considerably longer. This type of flange is often used as a nozzle for a barrel or a column. They can be classified later as standard type, heavy gun type, variable body type and whole body type. These flanges are kind of exclusive for the reason of their uncomplicated connectivity with other pipes. Where standard weld neck flanges are used extensively for pipes, long weld neck flanges (often abbreviated to LWN) are used in high pressure and high (or fluctuating) temperature situations primarily in the oil and gas industry. The long neck guides the pipe into the flange itself and provides reinforcement that a standard weld neck flange cannot. This reinforcement is very important for safety in high pressure industrial, commercial and even residential systems.
Uses of long-necked flanges are primarily on vessels where an elongated neck is required. Long-necked flanges (LWN) are primarily utilised on vessels where an elongated neck is required. This is considered a specialty flange because of the protruding neck or hub, which acts as a boring extension.
The conical collar helps reduce the thickness of the steel and appears to be a pipe extension. LWN steel flanges are used primarily in the chemical and petroleum industries, as well as in commercial and residential buildings ASME 16.47 anf asme 16.5 series of long weld flanges are used exclusively for situations in high levels of stress and fluctuating temperatures.
A weld neck flange, also called a tapered hub flange or high-hub flange, is a kind of flange that can relocate stress to the pipes, ensuring a decrease in high-stress concentration at the bottom of the flange. There are two welding neck flanges designs â?? the first type is used with wipes while the second, longer type cannot be used with pipes but with a process plant. The weld neck flange comprises of a round fitting that extends beyond the rim of the circumference. These flanges, typically manufactured from forging, are actually welded to pipes.
The rim has numerous holes drilled into it that enables the flanged to be attached to a bolted flange. This design is far better because of the structural valve.
Size 0-1 inch,1-5 inch,5-10 inch,10-20 inch,20-30 inch,>30 inch
Usage/Application Paper & Pulp Companies,High Pressure Applications,Oil and Gas Industry,Chemical Refinery,Pipeline
Material Stainless Steel
Material Standard ASTM A105,ASTM A182,ASTM A351,ANSI B16.5
Brand Nascent
Type Flange
high pressure flange,butt welding neck flange
1) Specification: DN15-DN2000
2) Size: 1/2 - 36"
3) Standard: ASME, ANSI, JIS, BS, and DIN
4) Material: stainless steel such as 304/304L/316/316L/316Ti/321; 1.4301/1.4307/1.4401/1.4404/1.4541/1.4571
super duplex stainless
steel such as ASTM A182 F51/F53
5) Can produce according to customers' demands
Weld neck flanges are drilled (machined) with the wall thickness of the flange having the same dimensions of the matching pipe. The lighter the pipe is, the larger the bore, conversely, the heavier the pipe, the small the bore. Our range weld neck flanges, welding neck flanges are normally used for high-pressure, cold or hot temperature. We specialize these flanges in different dimensional and material specifications based upon the requirements of the clients.
Face: Rised Face(RF), Full Face(FF), Ring Tongue Joint(RTJ).
Payment Term: L/C
MOQ: 10 Piece/Pieces
Means of Transport: by sea / by air
Supply Capacity
Production Capacity: 200 ton/month
Packing: wooden cases
Delivery Date: 15 days.
China manufacturer of ASME B16.5 A105 Class 150 2 Inch Carbon Steel Welding Neck Flange
Type: Weld Neck, Ring Joint ,Slip On, Blind, Lap Joint,
Standard: ASME B16.5
Material: A105
Manufacturing Method: Forged
Pressure: Class150-Class2500
Surface: Oiled , Painted
Third Party Inspection: SGS BV etc.
Packing: By Wooden Case or Pallet
Payment Term: At buyer's option
46676 Welding Flanges Suppliers
Short on time? Let Welding Flanges sellers contact you.
