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Pošalji RFQ36 članaka· Standardi
StandardiLearn how to verify ISO 9712 NDT personnel certification for pipe fittings and flanges. Understand the difference between ISO 9712, ASNT central certification, and employer-based SNT-TC-1A, and get practical procurement checks.
StandardiISO 9606-1 welder qualification proves an operator's skill within defined limits. Learn what records to check, how it differs from WPS/PQR, and key procurement risks.
StandardiUnderstand the role of ISO 15614-1 in qualifying welding procedures for steel and nickel alloys, and learn what buyers must verify before accepting a WPS/PQR.
StandardiISO 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.
StandardiASTM 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.
StandardiUnderstand 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.
StandardiUnderstand ASTM A403/A403M for wrought austenitic stainless steel fittings: WP/CR grades, classes, heat treatment, and procurement checks for EPC buyers.
StandardiASTM A694/A694M covers forged or rolled steel flanges, fittings, valves, and parts for high-strength transmission-service pipe. This guide explains grades, procurement checks, and inspection points for EPC buyers.
StandardiASTM A182 covers forged low-alloy and stainless steel flanges, fittings, valves, and parts for high-temperature service. This guide explains what buyers must specify beyond the standard, including grade, heat treatment, and dimensional standards.
