Long WeldNeck flange (CL-150-1-1/2″)

Long WeldNeck Flange (LWN), Class 150, Size 1 1/2 inch, Standard Manufacture: ASME B16.5

Long WeldNeck flange, also known as LWN. This flange has a neck or a long and elongated hub, which facilitates the transfer to the pipe. Long WeldNeck flange (CL-150-1-1/2″) is usually used in high-pressure and high-temperature applications such as oil and gas, petrochemical and power generation industries.

They are often used in situations where the pipe needs insulation or needs to be raised above ground. Also, the dimensions and specifications of the Long Weld Neck flange may be different according to the type of use. For this purpose, standards such as: ASME B16.5 or API 6A is used to ensure correct selection of dimensions and specifications. Before using flanges, it is better to consult with engineers and experts in this area.


1. Long neck: The neck of LWN flange is longer compared to WN flanges. This longer neck provides greater strength and reduces tension at the flange-to-pipe junction.

2. Smooth transition: The long neck of this flange allows a gradual transition from the flange to the pipe. This ensures uniform fluid flow and minimizes turbulence, which can be used in applications High pressure or high speed is useful.

3. Welding ability: extended flange neck, enough space for welding Provide. This allows Create stronger and safer welds between the flange and the pipe and achieve a tight connection to prevent leakage.

4. Materials: Carbon Steel, Alloy Steel and Stainless Steel

Technical specifications of the product:

Size: 1 – 1/2 inch

Class: 150

Standard: ASME B16.5

thickness: 14.45 mm

Length: 150 mm


Contact our specialists in the sales department for advice, order the Long Weld Neck flange (class 150 – size 1 1/2 inch) and inquire about its price.

Sales unit (central):

Phone numberEmail

Sales unit (Tehran):

Phone numberEmail

Sales unit (Mashhad):

Phone numberEmail