Weld Neck Flanges
Our company provides Weld Neck Flanges.
We provide flange products of various standards such as American standards, European standards, German standards, and Japanese standards. The list of common standards is as follows:
lewis Liu
sales Manager
Weld Neck Flanges
Here is a table outlining the specifications and characteristics of Weld Neck Flanges:
| Specification/Feature | Description |
|---|---|
| Type | Weld Neck Flange – A type of flange with a long tapered neck that is butt-welded to the pipe, providing excellent strength and stress distribution. |
| 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 | Weld Neck 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 | Weld Neck Flanges are butt-welded to the pipe, providing a strong and leak-resistant connection. |
| Application Areas | Weld Neck Flanges are widely used in industries such as oil and gas, petrochemical, power generation, and more for connecting high-pressure piping systems. |
| Standards and Codes | Weld Neck 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 | Weld Neck Flanges commonly use 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 | Weld Neck Flanges typically undergo a series of inspections and tests to ensure they meet quality and performance requirements, in compliance with standards. |
| Marking and Certification | Weld Neck 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 installation and regular maintenance of Weld Neck Flanges, including weld integrity, bolt torque, flange face cleaning, and seal replacement, are crucial for system integrity and performance. |
| Application Standards | In specific industries and applications, there may be industry-specific Weld Neck Flange application standards that need to be adhered to for safety and performance. |
This table provides a comprehensive overview of Weld Neck Flanges, covering key specifications, characteristics, and additional considerations. Specific details and requirements may vary based on the chosen flange size, pressure rating, and material.
Welding Neck Flanges are easy to recognize at the long tapered hub, which goes gradually over to the wall thickness from a pipe or fitting.
The long tapered hub provides an important reinforcement for use in several applications involving high pressure, sub-zero and/or elevated temperatures. The smooth transition from flange thickness to pipe or fitting wall thickness affected by the taper is extremely beneficial, under conditions of repeated bending, caused by line expansion or other variable forces.
These flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction on product flow. This prevents turbulence at the joint and reduces erosion. They also provide excellent stress distribution through the tapered hub and are easily radiographed for flaw detection.
This flange type will be welded to a pipe or fitting with a single full penetration, V weld (Buttweld).
