Technical Blog — Page 6
205 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, X12CrMo9-1) 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…
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Understanding PRE — Pitting Resistance Equivalent and When It Is Not Enough
15 May 2026
PRE is a single number that summarises an alloy's resistance to chloride pitting. It is one of the most useful tools in corrosion-resistant material…
Standards, Welding & Quality (1)
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EN 10204 3.1 vs 3.2 — What European Buyers Need to Know
1 June 2026
EN 10204 is the European standard governing inspection documents for metallic products. The difference between a 3.1 and 3.2 certificate is not merely…