Technical Blog — Page 6
180+ technical articles on buttweld pipe fitting material selection, standards, welding, heat treatment, inspection and procurement.
Alloy Steel & CrMo (2)
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PWHT for CrMo Pipe Fittings: Temperature Ranges by Grade
25 June 2026
Post-weld heat treatment is mandatory for all CrMo alloy steel pipe fittings — without exception. The temperature range varies by grade, and getting it…
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P9 vs P91 — Why 9Cr-1Mo Is Not the Same as Modified 9Cr-1Mo
1 May 2026
P9 (EN 1.7386, X11CrMo9-1) and P91 (EN 1.4903, X10CrMoVNb9-1) are both described as "9Cr-1Mo" steels — but they are completely different materials…
Stainless, Duplex & Super Duplex (2)
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Desalination Pipe Fittings: Grade Selection for SWRO, MSF, and MED Plants
26 June 2026
Desalination plants handle seawater, brine concentrate, and chemical dosing in high-temperature, high-pressure cycles — some of the most corrosive…