Category Archives for "Blog"

Duplex stainless steel and Supper duplex stainless steel

DefinitionsDuplex Stainless SteelThis refers to standard duplex stainless steel, a stainless steel with 22% chromium, with UNS S31803 and UNS S32205 (both known as Alloy 2205) being the most widely used. Common duplex stainless castings are UNS J92205 (ASTM A890 Grade 4A, CD3MN) and UNS J93372 (ASTM A890 Grade 1B, CD4MCuN).  A 22%Cr duplex stainless steel […]

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Update BSI Standards

Guide to shop BSI Standards here.Duty of Welding InspectorBS EN ISO 2553 – Welding and allied processes. Symbolic representation on drawings. Welded jointsBS EN ISO 9712 : 2012 – Non-destructive testing. Qualification and certification of NDT personnelTerm and Definitions​ BS 499-1: 2009 – Welding terms and symbols. Glossary for welding, brazing and thermal cutting.BS EN ISO […]

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Upgrade and retest material

An upgrade or retest material are normally conduct by mechanical properties, chemical composition and supplementary testing as agreement between the fabricator and supplier. The reason of the testing may be based on the unknown material (missing markings),  the unlisted approval vendor list, or re-verification of material, etc. These material shall be mock up and subject […]

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