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News
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How to Verify Solution Annealing on Duplex Fittings: A Step-by-Step Guide for QA/QC Teams
2026/09/08Introduction A duplex fitting can pass every dimensional check, carry a valid mill certificate, and still be dangerously brittle. The culprit is invisible: sigma phase, an intermetallic compound that forms when duplex stainless steel is cooled too sl...
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Why Do 2205 Duplex Fittings Crack After Heat Treatment? Understanding Sigma Phase and How to Verify Solution Annealing
2026/09/07Introduction You ordered 2205 duplex fittings. They arrived with a mill certificate showing correct chemistry, passed dimensional inspection, and were installed. Then, during hydrotest or shortly after commissioning, a crack appeared—not at a w...
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Welding Copper-Nickel Pipe: 5 Mistakes That Destroy Corrosion Resistance (And How to Avoid Them)
2026/09/04Introduction Copper-nickel pipe fails in seawater service for one reason more often than any other: the weld. The base metal is rarely the problem. The alloy itself — 90/10 or 70/30 Cu-Ni — is designed to form a protective oxide film that...
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How to Write a Copper-Nickel RFQ That Gets You the Right Fittings, Flanges and Certificates — First Time
2026/09/03Introduction If you've ever received a shipment of "Cu-Ni 90/10" flanges only to discover they were actually closer to 80/20 in composition, or waited three extra weeks because the mill test certificate format didn't match your project specification,...
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Why Your Copper-Nickel Fittings Fail in Seawater (And How to Prevent It)
2026/09/02Introduction Copper-nickel fittings have been the gold standard for seawater piping systems for decades. Their reputation is well-earned: properly specified, installed, and commissioned 90/10 and 70/30 copper-nickel systems have operated for up to 30...
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5 Critical Inspection Traps for Duplex Stainless Steel Fittings – Wall Thinning, Material Mix‑ups, and Abnormal Heat Treatment
2026/09/015 Critical Inspection Traps for Duplex Stainless Steel Fittings – Wall Thinning, Material Mix-ups, and Abnormal Heat Treatment You ordered duplex 2205 or 2507 fittings. The mill certificates looked perfect. The dimensions checked out. The price...
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Why Do 2205 Duplex Steel Pipe Fittings Crack During Heat Treatment? The Sigma Phase Culprit and How to Verify with Solution Annealing
2026/09/01Why Do 2205 Duplex Steel Pipe Fittings Crack During Heat Treatment? The Sigma Phase Culprit and How to Verify with Solution Annealing You bought 2205 duplex stainless steel pipe fittings with full mill certificates. The price was right. The delivery ...
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ASTM/ASME Standards for Nickel Alloy Pipe Fittings: A Complete Compliance Checklist for B2B Buyers
2026/07/31ASTM/ASME Standards for Nickel Alloy Pipe Fittings: A Complete Compliance Checklist for B2B Buyers When you source nickel alloy pipe fittings—whether Inconel 600/625, Hastelloy C‑276, Monel 400, or Alloy 825—compliance with ASTM and ASME ...
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Developmental Alloys vs. Established Grades: Assessing Risk in Specifying New Pipe Materials
2026/07/30Developmental Alloys vs. Established Grades: Assessing Risk in Specifying New Pipe Materials As an engineer, project manager, or procurement specialist specifying piping materials, you’re constantly balancing performance, cost, and longevity. T...
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On-Time Delivery and Supplier Reliability: What B2B Buyers Must Look for When Sourcing Nickel Alloy Tubes from China
2026/07/29On‑Time Delivery and Supplier Reliability: What B2B Buyers Must Look for When Sourcing Nickel Alloy Tubes from China You have done your technical homework. You know you need Inconel 625 tubes, ASTM B444 Grade 1, with full traceability. You found a Ch...
