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36개 기사· 표준

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ISO 9712 NDT Personnel Certification: Buyer Verification Guide

Learn 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.

2026년 11월 3일6 분Hebei Haihao Group
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ISO 7005-1 Steel Flanges: Series Selection and Scope

ISO 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.

2026년 10월 25일6 분Hebei Haihao Group
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ASTM A860 High-Strength Buttweld Fittings: Procurement Guide

ASTM 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.

2026년 10월 22일7 분Hebei Haihao Group
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ASTM A694 Forgings for High-Pressure Transmission Service

ASTM 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.

2026년 10월 13일6 분Hebei Haihao Group
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ASTM A182: Forged Alloy and Stainless Piping Components

ASTM 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.

2026년 10월 10일6 분Hebei Haihao Group