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Αποστολή RFQ336 άρθρα
ΤεχνικάASTM A262 and ASTM A763 detect intergranular attack in austenitic and ferritic stainless steels respectively. Learn which practice to specify, how to write RFQs, and what to check on test reports.
Οδηγός αγοράςVerifying NDT personnel certificates is more than checking a name and expiry date. This guide explains the key elements—method, level, sector, and scope—and highlights the differences between ISO 9712, ASNT 9712, ASNT NDT, and employer-based SNT-TC-1A certifications.
ΠρότυπαISO 7005-1:2011 is a base specification for steel flanges in industrial and general service piping. It covers chemical, power, oil & gas applications, but leaves flange series selection to the purchaser. This guide explains the standard's scope, key differences from ASME B16.5, and procurement checks.
ΤεχνικάSelecting between ASTM A1084 and A923 for lean duplex fittings requires matching the standard to the alloy. Learn what to specify in your RFQ, how to verify test reports, and how to avoid common acceptance mistakes.
Οδηγός αγοράςA practical guide for EPC engineers and procurement managers on reviewing welding procedure specifications (WPS), procedure qualification records (PQR), and welder certificates, with key checks and common pitfalls.
ΠρότυπαASTM A860 covers high-strength ferritic steel butt-welding fittings for high-pressure gas and oil pipelines. This guide explains scope, key requirements, and procurement checks, including the fact that hydrostatic testing is not mandatory under this specification.
ΤεχνικάDuplex fittings require two distinct metallurgical checks: ferrite volume fraction by ASTM E562 and detrimental intermetallic phase detection by ASTM A923. Procurement buyers need to understand the difference before specifying.
Οδηγός αγοράςChoosing between metallic and nonmetallic flange gaskets requires more than a quick comparison. This guide explains the ASME standards that govern each family, the critical factors to evaluate, and the procurement checks that prevent costly joint failures.
ΠρότυπαUnderstand the WP and CR classes in ASTM A815 for duplex stainless fittings, including subclasses WP-S, WP-W, WP-WX, and WP-WU, and how they affect procurement and inspection.
