Service Metal wn301.25 Weld Neck Flange 1-1/4 in 300 Lb

Product Description

The SERVICE METAL wn301.25 is a 1-1/4 inch Class 300 weld neck flange in carbon steel with a raised face and standard bore. Weld neck flanges are used where high stress or cyclic loading is a concern, as the tapered hub distributes stress into the pipe wall. This flange is designed for use in industrial piping systems handling steam, gas, liquid, or chemical service. Installation is performed by licensed pipefitters or journeyman plumbers working on pressure piping assemblies. At 6 pounds and a 5-1/4 inch outer diameter, it fits standard Class 300 bolt patterns.

This flange is suited for commercial and industrial piping applications operating within Class 300 pressure ratings. Typical installations include process piping, mechanical rooms, and plant utility systems where flanged joints are required at valves, pumps, or equipment connections. The raised face seating surface is compatible with standard spiral wound or ring-type gaskets used in Class 300 service. No specific OEM compatible models are stated in the available data for this part.

Key Features

• Class 300 pressure rating for demanding industrial and commercial piping service
• Weld neck design transfers stress into the pipe, reducing failure risk at the joint
• Raised face seating surface compatible with standard Class 300 gaskets
• Standard bore maintains full pipe inside diameter for unrestricted flow
• Carbon steel construction suitable for a wide range of industrial fluids
• Import sourcing provides a cost-effective option for non-spec or general service applications

Compatibility

Designed as a standard Class 300 weld neck raised face flange for use in 1-1/4 inch carbon steel piping systems conforming to ASME B16.5 bolt pattern and dimensional standards.

Installation Notes

Installation should be performed by a qualified pipefitter or licensed plumber in accordance with applicable mechanical and pressure piping codes such as ASME B31.3 or ASME B31.1. The system must be fully depressurized and isolated before work begins. The weld neck hub requires full-penetration butt welding to the mating pipe, followed by post-weld inspection appropriate to the service class. Flange face and gasket surfaces should be inspected for damage before assembly.

Technical Specifications

• Fitting Size: 1-1/4 inches
• Outer Diameter: 5-1/4 inches
• Pressure Rating: 300 LB
• Connection Type: Weld Neck
• Face Type: Raised Face
• Bore: Standard
• Material: Carbon Steel
• Weight: 6 pounds
• Origin: Import

Standard Information

• Brand: SERVICE METAL
• Manufacturer Part Number: wn301.25