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Weld Neck Flange

Short Description:

we utilize the latest technology and the highest quality materials to manufacture our weld neck flange.

We pride ourselves on our attention to detail and commitment to producing flanges that meet the highest industry standards.

Our flanges are rigorously tested to ensure they meet all necessary specifications and are capable of meeting your application needs.

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Product Description

As an industry-leading manufacturer, we are proud to offer a wide range of flanges to meet the diverse needs of our customers. Our products include plate flange, reducing weld neck flange, long weld neck flange, orifice flange, stainless steel flange, threaded flange, blind flange, anticorrosion flange and so on, all carefully crafted to ensure superior performance and durability.

At our state-of-the-art facility, we utilize advanced technology and premium materials to manufacture butt weld flanges to the highest quality standards. Whether you need stainless steel flanges, carbon steel flanges or anti-corrosion flanges, we have the perfect solution for your specific application. Our long butt weld flanges are designed to provide a strong, secure connection to a variety of piping systems, making them ideal for demanding industrial environments.

In addition to their excellent performance, our butt weld flange or called long welding neck flange are easy to install, saving you time and effort during the assembly process. Whether you're working on a new construction project or making repairs to an existing system, our flanges give you the convenience and peace of mind you need.

At Grand pipefitting, we are committed to providing quality products and exceptional customer service. Our tapered hub flange are backed by our expertise and dedication to excellence, ensuring you are completely satisfied with every purchase. 

Manufacturing Standards: ASME B16.5  EN1092-1 JIS B2220  HG20595-97 HG20617-97  HG/T20615-2009  HG/T20595-2009 HG/T20592-2009  GB/T9119-2010
Size: 1/2〞(DN15)to 100〞(DN2500)
Pressure: Class150 Class300 Class600 Class900 Class1500 Class2500  PN2.5、PN6、PN10、PN16、PN25、PN40、PN63、PN100、PN160


Surface Treatment: Antirust Paint,Oil Black Paint,Yellow Transparent
welding neck flange
butt weld flange
butt weld flange
butt weld flange
butt weld flange
butt weld flange


Ansi cast steel globe valve
  •  Manufacturer Test Certificate as per EN 10204 / 3.1B
  • Raw Materials Certificate
  • 100% Radiography Test Report
  • Third Party Inspection Report
  • Positive Material Identification - PMI Testing
  • Chemical Analysis - Spectro Analysis
  • Mechanical Testing
  • Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
  • Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
  • X Ray Test
  • Dye Penetrant Test (DP Test)
  • We can provide other testing certificates according to your requirements!


All our products comply with  standards of ASTM, ANSL, JIS, DIN, GB or even higher, passed the certification of API, EAC, PED

GOST, ISO9001 etc.
copper reducer

Use & Application

Our butt weld neck flanges are suitable for a wide range of applications from the oil and gas to the chemical and petrochemical industries.

Also including:

  • Architecture: orifice flange to connect pipelines
  • Bridge
  • Shipbuilding
  • Offshore and onshore services
  • Power generation industry
  • Food processing industry

Package & Transportation

threaded flange


  • Professional packaging and transportation
  • Customized logo is acceptable
  • Shrink-wrapped
  • wooden pallets
  • wooden boxes, etc.
  • As per customer's requirement if necessary.



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