Today’s pressurized water reactors run steam generator tubes made almost entirely from thermally treated Alloy 690. That single material change, moving away from Alloy 600, is one of the most consequential material changes in commercial nuclear history. The reason comes
Alloy 20 resists pure and high-concentration sulfuric acid better than either 904L or 254 SMO, and copper explains most of that gap. 904L follows closely, covering a wider spread of reducing acids at lower cost. 254 SMO is best when
A buyer specifies TP316L, a mill quotes SUS316L, and a fabricator requests 1.4404. All three designations may refer to the same alloy family, yet the underlying specification numbers, test protocols, and dimensional rules differ. Comparing ASTM, EN, and JIS steel
Seawater feed and brine reject lines fail for one reason above all others: chloride ions damage stainless steel until pitting or crevice corrosion breaks through. The right answer depends on where the pipe is placed in the train. Low-pressure intake
Hydrogen sulfide breaks high-strength steel without warning. A pipe wall can crack suddenly, well below its rated yield strength, through a brittle mechanism rather than gradual wear. NACE MR0175 / ISO 15156 governs which materials may be used anywhere near
Every piping specification begins with a single question: how thick must the wall be for a given pressure, and which formula should govern the answer? Three methods recur in calculation sheets across the industry. Barlow’s formula provides a rapid estimate
The ASTM standard written on a purchase order determines chemistry, mechanical testing, non-destructive examination, heat treatment, and marking requirements for every pipe or tube shipped against it. Choose the wrong one, and the delivery either arrives over-tested and overpriced, or
Specification engineers turn to super-duplex when 316L cannot withstand the chloride load, selecting among S32750 vs S32760 and S32550 becomes considerably more difficult once the datasheets are placed side by side. All three grades claim a PREN above 40, yet
At -162 oC, carbon steel doesn’t just lose strength. It loses ductility entirely and shatters like glass under load. This is the engineering reality behind every LNG material decision, from the storage tank to the loading arm. Four materials cover