+86-13771005953 
Inquiry@sunindustry.com
At Sunwen, a trusted supplier of high-performance piping components, we specialize in manufacturing carbon steel flanges for critical industrial applications. Among the many types of flanges, the welding neck flange remains one of the most popular, especially in high-pressure, high-temperature environments. In this article, we will focus on Forged Welding Neck Flange dimensions and specifications, providing detailed insights into their design, standard sizing, and industrial benefits.
Whether you’re working in oil and gas, chemical processing, or power generation, understanding Forged Welding Neck Flange dimensions and specifications is essential for selecting the right product for your pipeline systems.
What is a Forged Welding Neck Flange?
A forged welding neck flange is a type of flange with a long tapered neck that gradually transitions into the pipe wall. This unique feature allows it to distribute stress evenly and withstand extreme conditions. Because of its design, the Forged Welding Neck Flange dimensions and specifications are engineered to meet strict international standards and performance requirements.
At Sunwen, our forged welding neck flanges are crafted from premium carbon steel using precision forging and CNC machining techniques. Each product complies with recognized specifications to ensure long-term reliability.
Key Design Features
The most distinguishing characteristics of forged welding neck flanges are their long neck and beveled welding edge. These design elements contribute significantly to the mechanical integrity and durability of the system.
1. Long Tapered Neck
The long neck is designed to absorb high stress and pressure fluctuations. It enables a gradual transition from flange to pipe, reducing the risk of fatigue failure.
2. Beveled End for Butt Welding
The flange’s beveled edge allows for a full-penetration butt weld, forming a strong, leak-proof joint. This welding design is ideal for radiographic (X-ray) and ultrasonic inspection.
These features are critical when selecting forged welding neck flanges, which is why Forged Welding Neck Flange dimensions and specifications are carefully regulated across industries.
Standard Specifications
Sunwen manufactures flanges according to several global standards. Each specification defines the Forged Welding Neck Flange dimensions and specifications, including outer diameter, thickness, bolt circle, bolt hole size, and hub length.
Common Standards:
ASME B16.5 (for NPS ½” to 24″)
ASME B16.47 (for NPS above 24″)
EN 1092-1 (European standard)
API 6A (Oil and gas applications)
Each of these standards includes exact Forged Welding Neck Flange dimensions and specifications for different pressure ratings and temperature classes.
Pressure Ratings and Face Types
Sunwen supplies flanges with multiple pressure ratings, including:Class 150,Class 300,Class 600,Class 900,Class 1500,Class 2500.We also provide different face types:
Raised Face (RF)、Ring-Type Joint (RTJ)、Flat Face (FF)。
Each pressure class corresponds to a different set of Forged Welding Neck Flange dimensions and specifications, especially in terms of wall thickness and bolt circle size.
Why Dimensions and Specifications Matter
Understanding Forged Welding Neck Flange dimensions and specifications is critical to ensuring a proper fit and safe operation in piping systems. Mismatched flanges or improper sizing can result in:Stress concentration,Gasket failure,Pipe misalignment,System leaks or bursts.This is why Sunwen follows strict dimensional controls and quality inspections to maintain precise tolerances.
Sunwen: Your Reliable Partner
Sunwen is not only a carbon steel forged welding neck flange supplier, but also a trusted engineering partner. We help clients across oil, gas, chemical, and energy sectors select the right flanges based on detailed Forged Welding Neck Flange dimensions and specifications.
With over a decade of experience and a commitment to international standards, Sunwen delivers:
✅ Consistent product quality
✅ Fast global shipping
✅ Custom machining services
✅ Full technical documentation
In high-pressure and high-temperature applications, the right choice of flange can make all the difference. Understanding Forged Welding Neck Flange dimensions and specifications ensures compatibility, safety, and long-term system performance.
Sunwen is committed to supplying industry-leading carbon steel forged welding neck flanges that meet all critical dimensional and technical specifications. Contact us today for custom quotes, product catalogs, or technical support.