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Industry News
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Hastelloy C-276 vs. C-22: Which Grade Should You Specify for Your Chemical Process?
2026/10/12Hastelloy C-276 (UNS N10276) and C-22 (UNS N06022) are not interchangeable. They are both nickel-chromium-molybdenum alloys, both carry exceptional corrosion resistance, and both are routinely specified for the most aggressive chemical process enviro...
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MTR Traceability for Nickel Alloy Fittings: What a Complete Documentation Package Must Include
2026/10/10A nickel alloy fitting arrives on site with a one-page mill test report. The chemistry looks correct. The mechanical properties are within range. The heat number matches the stamp on the fitting. It gets installed. Eighteen months later, the fitting ...
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Inconel 625 Pipe Fittings in Chemical Processing: Where They Excel and Where They Don't
2026/10/09Inconel 625 (UNS N06625) has a reputation in chemical processing that borders on legendary. Engineers specify it for “aggressive service” the way they specify 316L for “general service” — as a default answer that avoids ...
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Solving Common Welding Cracks in Nickel Alloy Pipes: A Practical Troubleshooting Guide
2026/10/08Welding nickel alloy pipes — Alloy 625, C-276, Monel 400, Alloy 600 — is not like welding carbon steel or even stainless. The alloys are chosen for their corrosion resistance and high-temperature strength, but their welding behavior is fu...
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Heat Input and Interpass Temperature in Duplex Welding: A Practical Field Guide
2026/09/30Duplex welding failures rarely come from bad welders. They come from parameters that were correct on the WPS and wrong at the arc. The welder followed the procedure sheet. The heat input number was within range. The interpass temperature was checked....
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NORSOK M-650 vs. Standard ASTM Certification for Duplex Fittings: What Offshore Buyers Need to Know
2026/09/29You issue a purchase order for super duplex 2507 fittings. The supplier sends back EN 10204 3.1 mill certificates showing full chemical analysis, mechanical properties, and ferrite content within 40–60%. Every box is ticked. The fittings are sh...
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Filler Metal Selection for Duplex Welding: Why the Wrong Choice Costs You Corrosion Resistance
2026/09/28You qualified the welding procedure. The welder followed the WPS. Radiography passed. Hydrotest passed. Twelve months later, the weld is pitting in seawater service while the parent pipe is untouched. This is the signature failure mode of duplex stai...
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Duplex Pipe Fittings: 5 Inspection Traps Buyers Fall Into (Wall Thinning, Material Mix-Ups & More)
2026/09/25You ordered duplex 2205 or 2507 fittings. The mill certificates looked perfect. The dimensions checked out. The price was competitive. You installed them with confidence. Then six months into service, a fitting fails during a routine pressure test. O...
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What Does a Complete Cu-Ni Piping Package Look Like? Tubes, Fittings, Flanges and Bolting Explained
2026/09/24Most Cu-Ni seawater line failures do not start in the pipe wall. They start at the joint — where the tube ends and the flange begins. Or where the flange meets the gasket. Or where the bolt passes through the flange hole. The tube can be perfec...
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Cu-Ni 90/10 vs. 70/30: A Velocity and Sand Content Decision Matrix for Piping Engineers
2026/09/23If your seawater piping design has entrained sand in the flow, the velocity limit you used for clean seawater is wrong. It is too high. And the gap between what 90/10 and 70/30 can tolerate under those conditions is not as wide as the price premiu...
