Stainless Steel Flanges

Stainless steel 304 flanges are a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also facilitates cleaning, inspection or modification. Flanges are usually welded or threaded. Flange joints are made by bolting two flanges together with a gasket between them to provide a seal.

ASME SA182 304 stainless steel flanges have a minimum of 18% chromium, 8% nickel and a maximum carbon content of 0.08%. UNS S30400 SS flanges are defined as chromium-nickel austenitic alloys. Meanwhile, grade 304 is the standard “18/8” stainless steel you might see in pans and cooking tools. We supply these SS SUS 304 Pipe Flanges on custom request to our valued customers.

HT PIPE is one of the leading suppliers and traders of SS 304 flanges which are nickel plated to maintain austenitic composition at lower temperatures. Stainless Steel 304 Slip Flanges are austenitic stainless steel with better corrosion resistance than Stainless Steel 317.

These stainless steel 304 threaded flanges are suitable for welding as it has a lower carbon content than 301 to 303 series alloys to avoid carbide precipitation in welding applications. Equipment in the chemical, food, paper, mining, pharmaceutical and petroleum industries often includes stainless steel 304 butt weld flanges. The addition of molybdenum and a slightly higher nickel content make stainless steel 304 blind flanges suitable for construction applications in harsh environments, from contaminated Marine environment to areas with temperatures below zero.

Stainless Steel UNS S30400 Socket Weld Flanges also offer higher creep, rupture stress and tensile strength at elevated temperatures, excellent corrosion resistance and strength properties, making them ideal for manufacturing or forming applications.

Stainless steel 304 lap flanges are ideal for applications that require better corrosion resistance than Type 316 with good high temperature strength. The stainless steel 304 ring joint style flange is a low carbon version and is immune to sensitization. Therefore, stainless steel 304 eyeglass blind flanges are very frequently used for heavy duty welded components. Stainless steel 304 Nippolet flanges are considered resistant to pitting corrosion in chloride drinking water at ambient temperature, degrading at 60 degrees Celsius.

Stainless steel 304 flanges are widely used in petrochemical, oil and gas, power generation, bulk liquid transportation, chemical, pharmaceutical, pulp and paper, textile and other industries.

All our SS 304 flanges are manufactured to international standards. Stainless steel 304 pipe flanges are packaged to ensure no damage during shipping. In case of export, standard export packing is done in wooden case. All stainless steel 304 plate flanges are marked with grade, lot number, size, degree and our trademark.

Stainless steel 304 flanges are made from the 18/8 chrome-nickel austenitic stainless steel alloy most used in stainless steel applications.

This specification includes flanges for pressure vessel grade applications. The material has good strength and general corrosion resistance, high operating temperature. The minimum yield strength of 304 stainless steel flange is 215MPa, and the minimum tensile strength is 505MPa.

Stainless Steel 316 Flanges are made up of an austenitic stainless steel that has chromium, nickel and molybdenum in the content. The 4% molybdenum addition to the composition makes a difference in the mechanical properties as well as physical properties.

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.

As the name suggests, alloy steel butt weld flanges are welded to the bottom of the pipe. Flange holes match pipe holes, allowing undisturbed product flow and reducing turbulence and erosion at joints.

Stainless steel butt weld flanges are widely used in high pressure applications where they provide support strength and stress distribution. While ASME B16.9 butt weld flanges can be radiographed for flaw detection and are very durable.

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.

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.

Weld-on flanges are the most popular type of flanges with a weld bevel at the end of the neck extension. This type of flange is designed to be butt welded directly to the pipe to provide a superior and relatively natural form connection. In larger sizes and higher pressure ratings, this is pretty much the only type of flanged connection used. If only one style of drilled flange exists in modern applications, the weld neck flange will be your flange of choice.

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.