UNS S30400 Flange

A butt weld flange is a steel flange designed to transmit stress to the pipe to reduce high stress concentrations at the bottom of the flange. Compared to other types, butt weld flanges are distinguished by their tapered hub and smooth transition from flange thickness to pipe wall thickness. They are resistant to deformation and are typically used in high pressure piping systems, high or low temperature conditions.

These flange styles are also known as “Straight Hub Weld Flanges” according to ASME B16.5 subsection 2.8 and are given minimal detail in the governing code. This is because long weld necks are selected on a per application basis according to the specific engineering requirements of a given tank or pressure vessel. The working pressure, temperature and medium of the vessel are all key factors in determining which type of long butt weld flange connection you need.

In addition to the standard long weld neck, Texas Flange offers a variety of nozzle connections with varying wall thicknesses. When your pressure vessel requires a stronger outlet connection and can provide your desired barrel thickness, a reinforced barrel flange in the form of a nozzle is an option. Please contact us for your specific application as we can supply nozzle flanges in all commercially available material grades including carbon, stainless steel and nickel alloys.

RFWN flanges (raised face weld neck flanges) are one of the most commonly used flanges in the plumbing industry. Their long tapered hub matches the wall thickness (hole) of the pipe and is easy to identify.

Weld butt flanges and long butt weld flanges provide reinforcement in applications requiring high pressure and in extreme low and high pressure situations. It also helps address low cycle fatigue caused by otherwise variable force linear expansion.

Weld flange holes are machined to match the ID of the pipe or fitting. This creates a smooth transition between weld neck flanges and prevents turbulence at the weld neck. Therefore, it is important to specify a piping plan when purchasing butt weld flanges. Butt weld flanges are welded to the pipe with a full penetration weld and provide excellent stress distribution through the tapered neck. In critical applications, welds are also often radiographically or UT inspected.

Butt weld flanges are available in both raised and flat configurations. The most common butt weld flanges have standard holes or extra heavy holes. Sch 120 or Sch 160 hole flanges, heavier weights such as 600# to 1500#, are also common in butt weld flanges. HT PIPE sells a wide range of butt weld flanges in A105, A105N, stainless steel, duplex and super duplex steels and nickel alloys.

A butt weld flange (WN) conforming to ASME B16.5 is a typical one-piece flange. It is integrally cast or forged with a tapered neck butt welded to the tube. This design provides a smooth transition with few stress concentrations, as high stress concentrations at the bottom of the flange are reduced by transferring stress to the adjacent piping.

There are no gaps or grooves that could lead to crevice corrosion. Conical necks are also known as “nozzle necks” or more commonly “high hubs”. Although expensive, butt weld flanges are the best designed butt weld flanges because the long tapered hub provides excellent strength and dent resistance.

According to ASME B16.5, the hub of the butt welding flange can be roughly divided into a tapered part and a straight long part. The processing straight length is 6mm, which is precisely matched with the adjacent pipes, which is convenient for welding. Butt weld flanges are drilled to match the inside diameter of the adjacent pipe. The thinner the pipe wall, the larger the hole through the flange. The thicker the wall, the smaller the hole. Because of these matching relationships, there are no restrictions on traffic. Turbulence and erosion are thus eliminated.

ASME B16.5 Butt Weld Flanges shall be equipped with cut square heads when wall thicknesses are less than 5mm, and shall be provided with flat beveled ends when wall thicknesses are from 5mm to 22mm (inclusive), or when wall thicknesses are greater than 22mm Should be equipped with compound beveled end mm. Butt weld ends shall be machined in accordance with ASME B16.25.

Stainless Steel Raised Weld Face Flanges for blocking the ends of piping systems or valves. The raised face is designed to concentrate more pressure into a smaller area on the flange, providing enhanced sealing capability at higher pressures. Butt weld flanges are also designed to match the inside diameter (ID) of the connecting pipe. This flange is ideal for high pressure, high temperature and sub-zero temperature applications. This flange is inserted and welded to the connecting pipe.

The weld bevel is attached in a V-joint to the pipe end with a similar bevel, which allows for a uniform circular weld around the perimeter for a uniform transition. This allows gas or liquid within the piping assembly to flow through the flange connection with minimal restriction. Check the welded bevel connection after the welding procedure to ensure that the seal is uniform and free of abnormalities.

Another distinctive feature of butt weld flanges is the tapered hub. This type of connection provides a more gradual pressure distribution along the transition from the pipe to the bottom of the flange, helping to withstand some of the shock that occurs when used in higher pressure and higher temperature operating environments. Mechanical stress is limited considering the extra steel that transitions along the hub.

Butt weld flange, also known as tapered hub flange or high hub flange, is a flange that transfers stress to the pipe, ensuring that high stress concentrations at the bottom of the flange are reduced. There are two butt weld flange designs – the first is for rags, while the second, longer type cannot be used for pipes, but for processing plants.

Since higher pressure ratings almost exclusively require this type of flange connection, butt weld flanges are usually made with ring joint faces (also known as RTJ faces). This sealing surface allows a metal gasket to be crushed between the grooves of the two connecting flanges to create an excellent seal and complement the high-strength welded bevel connection to the pressurized piping assembly. RTJ weld necks with metal spacer connections are the primary choice for critical applications.

Long WN flanges look like typical butt weld flanges but are considered extended. It is often used as a nozzle for a column or barrel. You can also choose between Equal LWN Barrel and LWN Heavy Barrel, which have thick walls and their own shape.

Long butt weld flanges, also known as nozzle flanges or “long neck” flanges, are designed for the pressure vessel and tank manufacturing industries. They are usually made in one piece and are designed to replace standard weld neck and pipe weld combinations. The lack of the necessary welded connections is a defining characteristic of this flange style.

It is also called a butt weld flange because the flange neck has a reduced diameter and can be welded to smaller diameter pipes.

Flanges usually have a through hole and a square cut end (rather than the typical weld neck bevel). Generally, the bore diameter of the long weld neck is exactly the same as the actual nominal pipe size, but can be changed as needed. The overall length of the nozzle flange is also up to the end user, and the nozzle body can be modified to some pre-existing dimensions or custom sizes for additional reinforcement.

Butt weld flanges are available in a variety of materials. These materials must meet standards. Materials should also be of quality as specified by ASTM or ASME standards. However, the thickness and inner diameter of the flange will depend on the size of the pipe from which this butt weld flange is made.

The base of the neck connecting to the base of the flange is slightly rounded to alleviate the sudden vertical connection between the two parts of the flange and reinforce the idea of strengthening the one-piece structure.

When it comes to materials, carbon alloys are a common material for making these flanges because they are also resistant to extreme temperatures. It is available in ASTM A 181 and ASTM A 105 materials. Flanges are available in various grades such as ASME B16 47 ‘A’ series and ‘B’ series to meet customer and industry needs.

In addition to this material, butt weld flanges are also stainless steel. Flanges are made of ASTM A182, F304, 316L, 347H, 310S, ASME B16 5 and finished with duplex steel.
The duplex steel material of UNS S31803 is also in use. In addition to stainless steel, butt weld flanges are available in various other materials such as carbon alloys and nickel. Nickel alloy butt weld flanges are available for Inconel 600 and 625, Hastelloy C22, C276 and other such materials.

Butt weld flanges are flanges designed to be connected to piping systems by butt welding. There are many specifications of this flange. Butt weld flanges are expensive because of their longer necks and high personnel costs for WN flanges in contact with pipes or fittings, but are preferred for high stress applications. The neck or hub transfers the stress to the pipe.

The gradual transition of thickness from the bottom of the hub to the wall thickness of the butt weld provides significant reinforcement for the butt weld flange. The diameter of the butt weld flange matches the diameter of the pipe, reducing turbulence and erosion.

Butt weld flanges are flanges designed to be connected to piping systems by butt welding. Such flanges are available in a wide variety of sizes, but welding flanges are expensive due to their long necks and the high cost of personnel to contact the WN flange with the pipe or fittings, but are preferred for high stress applications. The neck or hub transfers the stress to the pipe.

The thickness gradually transitions from the bottom of the hub to the wall thickness at the butt weld, providing an important reinforcement for the butt weld flange. The inner diameter of the butt weld flange matches the inner diameter of the pipe, reducing turbulence.

Butt weld flanges (also known as tall hub flanges and tapered hub flanges) are a type of flange. There are two designs. Regular types are used with pipes. The long version is not suitable for pipes and is used in processing plants. Butt weld flanges consist of a circular fitting with a protruding edge on its circumference.

These flanges are usually machined from forgings and are usually butt welded to the pipe. The rim has a series of drilled holes that allow the flange to be bolted to another flange.

This flange is suitable for harsh environments with extreme temperatures, pressures or other stressors. The elasticity of this flange is achieved by sharing environmental stresses with the pipe to which it is welded. This flange has been used successfully for pressures up to 5,000 psi.