Alloy welding in Alberta

Welding alloy piping is more challenging than welding other types of steel. Done incorrectly, the alloy piping may corrode prematurely or bend or break under stress. At Advanced Flow Systems, we deliver reliable, durable alloy pipe welding for any industrial application. Our welders are experienced, trained and equipped with the best tools, so their work meets the highest industry standards.

You can trust Advanced Flow Systems to ensure your pipe welds meet all codes and regulations. Contact us at our Alberta plant today to request a quote.

Alloys can strengthen steel and make it more resistant to stress, impacts and corrosion. In the piping industry, high-alloy metals are favoured because they’re ductile yet highly durable. The oil and gas and power generation industries often use alloy piping because it withstands extreme hot and cold temperatures and rough conditions.

Alloy steel piping can contain nickel, chromium, molybdenum, copper and cobalt. These metals require specific welding techniques and processes to ensure proper fusion. Here are just a few of the things that welders need to keep in mind when working with alloy piping.

• Move slowly. Welding steel already requires a slow and steady approach. Moreso with alloys. Alloy metals have lower thermal conductivity than steel, and the molten alloy isn’t as fluid. It means the welder needs to take special care not to move too quickly to avoid the risk of problems like cold lap.
• Don’t overheat. Welders may be tempted to increase the current to compensate for a sluggish puddle. However, upping the current will only vaporize the alloy materials, increasing the risk of corrosion and decreasing the weld’s longevity. Welders must always inspect their work for signs of excessive heat, including colour change.
• Use shielding gas. Argon gas is mainly used in alloy pipe welding, set at a flow rate of 10 to 20 cubic feet per hour and used with a lens. Keep the tungsten extension as short as possible to stay within the shielding gas envelope. Oxidization, or “sugaring,” can occur without proper gas coverage.
• Preparation is critical. Thoroughly clean the filler rod, the bevel and the joint with chemical solvents. Grease, oil, paint, marking crayons, ink, lubricants, cutting fluid and processing chemicals can contain sulphur, phosphorus, lead and other contaminants that can make welds brittle. Do this work with gloves because oil from your hands can also contaminate the weld.

Advanced Flow Systems is an industry leader in alloy pipe welding and pressure vessel welding, including helical coils for boilers and heaters. Our combination of experience and equipment offers commercial and industrial clients the highest quality pipe welding, bending and painting. Contact us today at our plants in Alberta and British Columbia.