ASME/ANSI B16.5 Flanges
Our company provides ASME/ANSI B16.5 Flanges.
ASME B16.5 standard covers Steel Pipe Flanges and Flanged Fittings from NPS 1/2 through NPS 24 Metric/Inch in pressure class 150 to class 2500. The term “B16.5” or “B16 5” are used interchangeably and refers to the same standard. However, the standard ASME B16 5 (ANSI B16 5) only covers sizes up to 24 inches.
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ASME/ANSI B16.5 Flanges
Here is a table outlining the specifications and characteristics of ASME/ANSI B16.5 Flanges:
| Specification/Feature | Description |
|---|---|
| Standard | ASME/ANSI B16.5 Flanges. |
| Types | ASME/ANSI B16.5 Flanges include various types such as Weld Neck, Slip-On, Threaded, Socket Weld, Blind, and Lap Joint. |
| Pressure Ratings | Available in different pressure classes, such as 150, 300, 600, 900, 1500, 2500, etc., to accommodate varying pressure requirements. |
| Size Range | Typically available in sizes ranging from 1/2 inches to 48 inches or larger, suitable for various pipe and equipment sizes. |
| Materials | ASME/ANSI B16.5 Flanges can be manufactured from materials like carbon steel, stainless steel, alloy steel, and more, chosen based on application requirements. |
| Facing Types | Common facing types include Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ), and Male and Female (M&F) facings, impacting sealing methods. |
| Bolt Hole Quantity and Diameter | The number and diameter of bolt holes vary with flange size and pressure rating, facilitating flange connection. |
| Connection Method | ASME/ANSI B16.5 Flanges are typically connected using bolts and nuts, with the specific method depending on the flange type and pressure rating. |
| Application Areas | These flanges are widely used in industries such as oil and gas, petrochemical, water treatment, and more for connecting pipes, valves, pumps, and equipment. |
| Standards and Codes | ASME/ANSI B16.5 Flanges adhere to standards set by the American National Standards Institute (ANSI) and nominal pipe size (NPS) standards, such as ANSI B16.5. |
| Seal Types | ASME/ANSI B16.5 Flanges commonly employ gaskets or O-rings for sealing, with the choice of seal type depending on the application and pressure rating. |
| Accessories and Attachments | Some applications may require additional components such as flange gaskets, bolts, nuts, flange covers, or flange cover gaskets. |
| Inspection and Testing | ASME/ANSI B16.5 Flanges typically undergo a series of inspections and tests to ensure they meet quality and performance requirements, in compliance with standards. |
| Marking and Certification | ASME/ANSI B16.5 Flanges should be marked with the manufacturer’s identification, size, class, material, and other relevant information. Some flanges may require specific certifications such as PED or ASME. |
| Installation and Maintenance | Proper flange installation and regular maintenance, including bolt torque, flange face cleaning, and lubrication, are essential for system integrity and performance. |
| Application Standards | In specific industries and applications, there may be industry-specific flange application standards that need to be adhered to for safety and performance. |
This table provides a comprehensive overview of ASME/ANSI B16.5 Flanges, covering key specifications, characteristics, and additional considerations. Specific details and requirements may vary based on the chosen flange type, size, pressure rating, and material.
ASME B16.5 standard covers steel pipe flanges and flanged fittings from NPS ½” through NPS 24” in pressure classes 150 to 2500. This includes pressure ratings, dimensions, tolerances, materials, marking, and testing. ASME B16.5 and ANSI B16.5 only cover sizes up to 24 inches.
Included are:
(1) flanges with rating class designations 150, 300, 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 24 and flanges with rating class designation 2500 in sizes NPS 1/2 through NPS 12, with requirements given in both metric and U.S. Customary units with a diameter of bolts and flange bolt holes expressed in inch units;
(2) flanged fittings with rating class designation 150 and 300 in sizes NPS 1/2 through NPS 24, with requirements given in both metric and U.S. Customary units with a diameter of bolts and flange bolt holes expressed in inch units;
(3) flanged fittings with rating class designation 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 24 and flanged fittings with rating class designation 2500 in sizes NPS 1/2 through NPS 12 that are acknowledged in Non-Mandatory Appendix E in which only U.S. Customary units are provided.
B16.5 is limited to flanges and flanged fittings made from cast or forged materials, and blind flanges and certain reducing flanges made from cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding flange bolting, flange gaskets, and flange joints.
This Standard is to be used in conjunction with equipment described in other volumes of the ASME B16 Series of Standards as well as with other ASME standards, such as the Boiler and Pressure Vessel Code and the B31 Piping Codes.
Careful application of these B16 Standards will help users to comply with applicable regulations within their jurisdictions while achieving the operational, cost, and safety benefits to be gained from the many industries’ best practices detailed within these volumes.
Intended for manufacturers, owners, employers, users, and others concerned with the specification, buying, maintenance, training, and safe use of valves with pressure equipment, plus all potential governing entities.
ASME/ANSI B16.5 Flanges are a family of flanges that are designed and manufactured to conform to the ASME/ANSI B16.5 standard. This standard specifies the dimensions, materials, and testing requirements for flanges used in piping applications in the USA.
ASME/ANSI B16.5 Flanges are available in a range of types, including slip-on, threaded, socket weld, lap joint, weld neck, and blind flanges. Each type of flange has unique features and applications.
Slip-on Flanges are easy to align and have low hub dimensions, making them a popular choice for low-pressure applications.
Threaded Flanges are used in low-pressure applications where welding is not an option.
Socket Weld Flanges are used in small-bore piping systems that require high pressure and temperature resistance.
Lap Joint Flanges are used in piping systems that require frequent dismantling and inspection.
Weld Neck Flanges are used in high-pressure and high-temperature applications.
Blind Flanges are used to terminate a piping system or to create a temporary seal for maintenance purposes.
The selection of the appropriate ASME/ANSI B16.5 Flange type depends on the specific application, including the pressure, temperature, and fluid type of the piping system.
The ASME/ANSI B16.5 standard specifies the dimensions and tolerances of the flanges, including the outside diameter, bolt circle diameter, bolt hole diameter, and thickness. The standard also sets out the marking requirements and the testing procedures to ensure the quality and performance of the flange.
ASME/ANSI B16.5 Flanges are available in a range of materials, including carbon steel, stainless steel, and alloy steel, among others. The material selection depends on the specific requirements of the application, such as the temperature, pressure, and corrosion resistance of the piping system.
In summary, ASME/ANSI B16.5 Flanges are a family of flanges designed and manufactured to conform to the ASME/ANSI B16.5 standard. These flanges are available in a range of types, each with unique features and applications. Proper selection, installation, and maintenance of ASME/ANSI B16.5 Flanges are crucial to ensure a safe and reliable operation of the piping system.
