Expander Flange

What is a Expander Flange?

An expander flange is a type of flange that is used to connect two pipes or pieces of equipment with different sizes. It has a hub that expands to a larger size, allowing it to connect to a larger pipe. It is often used in situations where there is limited space or when it is not possible to use a reducer to connect to a larger pipe. The pressure rating and dimensions of an expander flange are in accordance with ANSI/ASME B16.5, which is a standard for pipe flanges and flanged fittings. It also typically has a raised face.

Advantages and disadvantage of Expander Flanges

Expander flanges have a number of advantages and disadvantages that make them suitable for certain applications and not others.

Advantages of expander flanges:

• Low profile: Expander flanges are designed to be low profile, which means they do not protrude very far from the pipe or tubing they are attached to. This makes them suitable for use in tight spaces where other types of flanges might not fit.
• Easy installation: Expander flanges are relatively easy to install compared to other types of flanges. They can be attached to the pipe or tubing using simple hand tools, making them suitable for use in situations where a more complex installation process is not practical.
• High pressure rating: Expander flanges are designed to handle high pressure applications, making them suitable for use in a wide range of industries including oil and gas, chemical processing, and power generation.
• Cost-effective: Expander flanges are generally more cost-effective than other types of flanges, making them a good choice for projects where cost is a major consideration.

Disadvantages of expander flanges:

• Limited size range: Expander flanges are only available in a limited size range, which may not be suitable for larger diameter pipes or tubing.
• Limited materials: Expander flanges are generally only available in a limited range of materials, such as carbon steel and stainless steel. This may limit their use in certain applications where other materials are required.
• Limited temperature range: Expander flanges are not suitable for use in extremely high or low temperature applications, as the expansion and contraction of the pipe or tubing may cause the flange to fail.
• Limited applications: Expander flanges are not suitable for use in all applications, and may not be the best choice for certain types of piping systems.

Material of Expander Flanges

The material used for expander flanges depends on the specific application and the operating conditions of the system. Some common materials used for expander flanges include:  

Carbon Steel Expander Flange	ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel Expander Flange	ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Alloy Steel Expander Flange	ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Titanium Expander Flange	ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7 ASTM  R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 | R53400/GR.12 | R56320/GR.9 |R56400/GR.5
Copper Expander Flange	T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Copper Nickel Expander Flange	ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Brass Expander Flange	3602 / 2604 / H59 / H62 / etc.
Inconel Expander Flange	ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 Expander Flange
Hastelloy Expander Flange	ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X
Monel Expander Flange	ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Alloy 20 Expander Flange	ASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3
Aluminium Expander Flange	5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel Expander Flange	ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Duplex Expander Flange	S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex Expander Flange	S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy Expander Flange	ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925
254 Smo Expander Flange	ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547
Nimonic Expander Flange	Nimonic 75, Nimonic 80A, Nimonic 90
Other Expander Flange material	Tin bronze, Alumunum bronze, Lead bronze

Size of Expander Flanges

The size of expander flanges depends on a number of factors, including the size of the pipes or components being joined, the type of material the pipes are made of, and the pressure and temperature ratings of the piping system. Typically, expander flanges are available in a range of sizes to accommodate different types and sizes of pipes.
In general, expander flanges are classified based on their diameter and the thickness of their walls. The diameter is measured in inches or millimeters and is typically expressed in terms of the nominal pipe size (NPS), which refers to the internal diameter of the pipe. The wall thickness, on the other hand, is measured in millimeters or inches and refers to the thickness of the pipe wall.
To determine the size of expander flanges needed for a particular piping system, it is important to consider the size of the pipes being joined, the pressure and temperature ratings of the system, and any other specific requirements or considerations that may be relevant.

Dimensions of Expander Flanges

The dimensions of expander flanges are typically specified in inches or millimeters, and may include the outer diameter (OD) of the flange, the inner diameter (ID) of the flange, and the thickness of the flange. Other dimensions may also be specified, such as the length of the flange, the width of the flange, and the number of bolt holes.

Dimensions of Expander Flange, ANSI CLASS 150, B16.5 (IN)

• Dimensions per ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
• Bolt circle diameters are 1/8 inch larger than bolt diameter.

Design Type A

Design Type C

Design Type D

Dimensions of Expander Flange, ANSI CLASS 300, B16.5 (IN)

• Dimensions per ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
• Bolt circle diameters are 1/8 inch larger than bolt diameter.

Design Type A

Design Type B

Design Type C

Design Type D

Dimensions of Expander Flange, ANSI CLASS 600, B16.5 (IN)

• Dimensions per ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
• Bolt circle diameters are 1/8 inch larger than bolt diameter

Design Type A

Design Type B

Design Type C

Design Type D

Pipe Size (NPS)	Outside Diameter of Flange A	Diameter of Raised Face B	Thickness of Flange C	Diameter of Bore D	Diameter of Bore D2	Diameter of Hub at Weld H	Diameter of Hub at Base J	Length of Hub K	Compound Taper CT	Slopeat Bevel SB	Number of Bolt Holes	Diameter of Bolt Holes	Bolt Circle Diameter P	Approx. Weight (lb)	Design Type
2 x 3	6 1/2	3 5/8	1	*	*	2.375	3 5/16	2 7/8	–	14°	8	3/4	5	12	A
2 x 4	6 1/2	3 5/8	1	*	*	2.375	3 5/16	2 7/8	1/2	29° **	8	3/4	5	12	C
3 x 4	8 1/4	5	1 1/4	*	*	3.500	4 5/8	3 1/4	–	13°	8	7/8	6 5/8	23	D
4 x 6	10 3/4	6 3/16	1 1/2	*	*	4.500	6	4	–	21°	8	1	8 1/2	42	A
6 x 8	14	8 1/2	1 7/8	*	*	6.625	8 3/4	4 5/8	–	21°	12	1 1/8	11 1/2	81	D
8 x 10	16 1/2	10 5/8	2 3/16	*	*	8.625	10 3/4	5 1/4	–	19°	12	1 1/4	13 3/4	117	D
10 x 12	20	12 3/4	2 1/2	*	*	10.750	13 1/2	6	–	16°	16	1 3/8	17	189	D
12 x 14	22	15	2 5/8	*	*	12.750	15 3/4	6 1/8	–	10°	20	1 3/8	19 1/4	226	D
14 x 16	23 3/4	16 1/4	2 3/4	*	*	14.000	17	6 1/2	–	15°	20	1 1/2	20 3/4	347	D
16 x 18	27	18 1/2	3	*	*	16.000	19 1/2	7	–	14°	20	1 5/8	23 3/4	481	D
18 x 20	29 1/4	21	3 1/4	*	*	18.000	21 1/2	7 1/4	–	14°	20	1 3/4	25 3/4	555	D
20 x 24	32	23	3 1/2	*	*	20.00	24	7 1/2	5/8	28° **	24	1 3/4	28 1/2	690	E
24 x 30	37	27 1/4	4	*	*	24.00	28 1/4	8	3/4	28° **	24	2	33	977	C

• * To be specified by purchaser.
• ** The slope at the welding bevel approximates 1:3 maximum size. The flange bore has a compound angle of 18° through dimension “CT” and the remaining taper as indicated.

Manufacturing process of forged expander flange

The manufacturing process for forged expander flanges typically involves the following steps: Cutting the raw materials to size: The first step in the manufacturing process is to cut the raw materials to the required size and shape. This typically involves cutting sheets of metal, such as carbon steel or stainless steel, using a cutting machine. Forming the flange: Once the raw materials have been cut to size, the next step is to form the flange. This typically involves using a die-stamping machine to shape the metal into the desired flange shape. Heat treating the flange: Once the flange has been welded, it must be heat treated to improve its strength and durability. This typically involves heating the flange to a high temperature and then rapidly cooling it to harden the metal. Machining the flange: After the flange has been heat treated, it must be machined to achieve the desired level of precision and to create the necessary bolt holes and other features. This typically involves using a lathe or other machining equipment to shape the flange to the required specifications. Drilling holes in the flange for bolts to connect it to other components. Cleaning and preparing the surface of the flange for finishing. Applying a protective coating such as paint or galvanization to protect the flange from corrosion. Testing the flange to ensure it meets the required specifications and tolerances. Packaging the flange for shipping or storage. These steps may vary slightly depending on the specific type of flange being manufactured and the requirements of the application it will be used in.

Marking of Expander Flanges

Expander flanges are typically marked with certain information to identify the specific type of flange and its characteristics. This information may include the manufacturer’s name or logo, the flange size and rating, the material grade, and any relevant certifications or standards that the flange meets.
For example, an expander flange may be marked with a size such as “6 inch” to indicate the diameter of the flange, and a rating such as “150#” to indicate the pressure rating of the flange. It may also be marked with a material grade such as “A105” to indicate the type of material the flange is made from, and a certification such as “ASME” to indicate that it meets the standards set by the American Society of Mechanical Engineers.
In addition to these markings, expander flanges may also have other markings such as heat numbers or serial numbers for traceability purposes. These markings may be stamped, laser etched, or otherwise inscribed on the flange to ensure that the flange can be traced back to its manufacturing source if necessary.

Packing of Expander Flanges

Expander flanges are usually packed in cartons or wooden boxes. In order to prevent damage during transportation, the box can also be protected inside, such as using foam filler or other similar materials. It is important to ensure that the stainless steel expander flange will not be damaged during transportation to ensure that it can work as expected.

Inspection and Measurement of Expander Flanges

There are several factors that need to be considered when inspecting and measuring expander flanges, including:

• Material: Expander flanges are typically made of metal, and it is important to select the correct material for the intended application. Common materials used for expander flanges include carbon steel, stainless steel, and aluminum.
• Dimension: The dimensions of the flange, including the diameter, thickness, and bolt hole size, should be checked to ensure that they meet the required specifications.
• Surface finish: The surface finish of the flange should be smooth and free from defects such as scratches, dents, or cracks.
• Bolt hole alignment: The bolt holes in the flange should be properly aligned to ensure that the bolts can be easily inserted and tightened.
• Bolt hole size: The bolt holes should be the correct size for the bolts being used, and should not be oversized or undersized.
• Bolt hole thread: The threads on the bolt holes should be in good condition and should not be damaged or stripped.
• Gasket surface: The gasket surface on the flange should be smooth and free from defects, as this will ensure a good seal when the flange is tightened.

To inspect and measure expander flanges, you will need a set of calipers or a micrometer to accurately measure the dimensions of the flange. It is also a good idea to have a torque wrench on hand to ensure that the bolts are tightened to the correct torque specification.

Application of Expander Flanges

Expander Flanges are known to deliver exceptional performance and are generally developed for meeting the demands. These Expander Flange is use in various industries like:

• Stainless Steel Expander Flange uses in Oil and Gas Pipeline;
• Raised Face Expander Flange uses in Chemical Industry;
• Alloy Steel Expander Flange uses in Plumbing;
• Flat Faced Expander Flange uses in Heating;
• Expander Flange uses in Water Supply Systems;
• Forged Expander Flange uses in Power Plant;
• Expander Flange uses in Paper & Pulp Industry;
• Expander Flange uses in General Purpose Applications;
• Steel Expander Flange uses in Fabrication Industry;
• Expander Flange uses in Food Processing Industry;
• Expander Flange uses in Structural Pipe.

How to purchase the correct expander flanges?

To purchase the correct expander flanges, you will need to consider the following factors:

• Size: Make sure to measure the size of the pipe or tubing that the expander flange will be used on, and purchase a flange that is the same size.
• Material: Expander flanges are made from a variety of materials, including stainless steel, carbon steel, and aluminum. Choose a material that is compatible with the pipe or tubing and the intended application.
• Pressure Rating: Make sure to select a flange that is rated for the pressure of the system it will be used in.
• Connection Type: Expander flanges can be connected using bolts, welds, or a combination of both. Choose the appropriate connection type for your application.
• Standards: There are various standards that expander flanges can be manufactured to, such as ASME, ANSI, and DIN. Choose a flange that meets the standards required for your application.
• Certification: If required for your application, look for expander flanges that are certified to meet certain standards, such as those set by the American Society of Mechanical Engineers (ASME).

It is also a good idea to purchase expander flanges from a reputable manufacturer or supplier to ensure that you are getting a high-quality product.

How to select expander flanges manufacturer?

There are several factors you may want to consider when selecting an expander flange manufacturer:

• Determine your needs: Consider the size, material, and design specifications of the expander flanges you require.
• Quality: Look for a manufacturer with a reputation for producing high-quality products. This can be determined through customer reviews and industry certifications such as ISO 9001.
• Experience: Consider a manufacturer with a track record of producing expander flanges for a variety of industries and applications. This can be an indication of their expertise and ability to meet the specific needs of your project.
• Capacity: Determine if the manufacturer has the capacity to produce the quantity of expander flanges you need within your desired timeframe.
• Customization: If you have specific requirements for your expander flanges, such as custom sizes or materials, make sure the manufacturer has the capability to produce customized products.
• Cost: Consider the manufacturer’s pricing, but be aware that the lowest price may not always be the best value. It is important to balance cost with quality and the other factors listed above.
• Location: If you are located in a specific region, it may be more convenient and cost-effective to work with a manufacturer in that region.
• Communication: Good communication is key to any successful business relationship. Consider a manufacturer with responsive and helpful customer service.
• Research manufacturers: Look for manufacturers that specialize in the type of expander flanges you need and have a proven track record of producing high-quality products.
• Request quotes: Contact multiple manufacturers to request quotes for the expander flanges you need. Be sure to provide detailed specifications and ask about lead times, delivery options, and any additional costs or fees.
• Review the quotes: Compare the quotes you receive to determine which manufacturer offers the best value for your needs. Consider factors such as price, delivery time, and the reputation of the manufacturer.
• Consider other factors: In addition to price and delivery, consider factors such as the manufacturer’s experience, capabilities, and quality control processes. It may also be helpful to read reviews or ask for references from other customers.
• Make your selection: Based on your research and comparison of quotes, select the manufacturer that best meets your needs and budget. Be sure to clarify any questions or concerns before placing your order.

Export Country For Expander Flanges

MIDDLE EAST	AFRICA	NORTH AMERICA	EUROPE	ASIA	SOUTH AMERICA
Saudi Arabia	Nigeria	Usa	Russia	India	Argentina
Iran	Algeria	Canada	Norway	Singapore	Bolivia
Iraq	Angola	Mexico	Germany	Malaysia	Brazil
Uae	South Africa	Panama	France	Indonesia	Chile
Qatar	Libya	Costa Rica	Italy	Thailand	Venezuela
Bahrain	Egypt	Puerto Rica	Uk	Vietnam	Colombia
Oman	Sudan	Trinidad And Tobago	Spain	South Korea	Ecuador
Kuwait	Equatorial Guinea	Jamaica	Ukraine	Japan	Guyana
Turkey	The Republic Of Congo	Bahamas	Netherland	Sri Lanka	Paraguay
Yemen	Gabon	Denmark	Belgium	Maldives	Uruguay
Syria			Greece	Bangladesh
Jordan			Czech Republic	Mayanmar
Cyprus			Portugal	Taiwan
			Hungary	Cambodia
			Albania
			Austria
			Switzerland
			Slovakia
			Finland
			Ireland
			Croatia
			Slovenia
			Malta