When taking on a gas line installation or modification project, selecting the proper weld fittings is an extremely important decision. Using fittings specifically designed for gas service is critical for safety and durability. There are a few key types of weld fittings, such as screwed fittings, to consider for your gas line application.

1. Elbow Fittings

Elbow fittings connect pipes together at an angle. 90-degree elbow fittings provide a tight, straight-turn direction change. 45-degree elbow weld fittings offer a more gradual, sweeping bend. Incorporating elbows reduces stress from vibrations that could cause failures or cracks over time. Elbows also save space when you need to neatly route pipes around obstacles or change direction.

2. Tee Fittings

Tee fittings are shaped like the letter “T,” allowing branch lines to come off the main pipe. Common types of tee fittings include straight tees, reducing tees, and branch tees. Tee weld fittings are useful when you need to split from the main line and run pipes in multiple directions. For maximum strength, full penetration welds should be used when joining tee fittings to pipe joints.

3. Cap Fittings

Cap fittings are placed on the end of a pipe to seal it off securely. Pipe cap fittings protect the open ends of gas lines during installation and before final connections are made. Caps also allow for future expansion if needed. For safety, cap weld fittings need complete weld coverage both inside and out with no gaps.

4. Flange Fittings

Flanged fittings connect with bolts, providing access to gas lines for maintenance. Slip-on and weld neck flanges can be paired with gaskets to seal flange joints. Flanges offer easy access compared to permanent welds. Check for corrosion or damage that could prevent proper gasket sealing.

The material used for fittings is also an important factor. Malleable steel allows for threading and welding while providing durability under pressure. According to Columbus McKinnon Corporation, forged parts have a 37% higher fatigue strength, resulting in a factor of six longer fatigue life. Any fittings must be certified for gas service. Proper cleaning, preparation, welding method, and inspection help create leak-free joints.

For critical gas line connections, consult an experienced welder on the best fitting choices to meet code requirements and safely withstand pressure. Do not compromise safety — only use fittings designed for gas systems. Investing in the right weld fittings and screwed fittings gives peace of mind that your gas lines will perform reliably for years to come. Reach out to us today to find the weld fittings and screwed fittings you need.