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Decarburization Depth on Heat-Treated Fittings
Learn how ASTM E1077 and A960/A960M apply to decarburization depth on heat-treated fittings, and what to specify in your RFQ to avoid disputes.
2026年10月15日5 分Hebei Haihao Group
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Induction Bend RFQ Checklist: Geometry, Material and Testing
A practical RFQ checklist for ASME B16.49 induction bends, covering geometry, material, testing, and documentation requirements for transportation and distribution piping.
2026年10月14日6 分Hebei 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.
2026年10月13日6 分Hebei Haihao Group
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Grain Size Verification for Forged Stainless Fittings
Grain size testing under ASTM A182 is mandatory only for certain grades. Learn when ASTM E112 applies, which methods are used, and what buyers must verify before accepting a fitting.
2026年10月12日6 分Hebei Haihao Group
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Orifice Flange RFQ Checklist: Class, Type, Taps and Documents
Specifying orifice flanges requires more than a standard flange RFQ. This checklist covers ASME B16.36 scope, class/type limits, tap details, and documentation gaps to verify before ordering.
2026年10月11日6 分Hebei 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.
2026年10月10日6 分Hebei Haihao Group
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Subsize Charpy Specimens and Impact Test Records for Fittings
Charpy impact records for pipe fittings often include subsize specimens. Learn what ASTM E23 and A370 actually require, and where acceptance criteria must be found.
2026年10月9日6 分Hebei Haihao Group
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Gray Iron vs Ductile Iron Flanges: A Procurement Comparison
Gray iron and ductile iron flanges are covered by different ASME standards with distinct classes and ratings. This guide explains the key differences, procurement checks, and RFQ requirements to avoid costly specification errors.
2026年10月8日5 分Hebei Haihao Group
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ASME B16.42 Ductile Iron Flanges: Classes 150 and 300
ASME B16.42 covers cast ductile iron flanges and flanged fittings in Classes 150 and 300. This guide explains scope, key requirements, and procurement checks for EPC engineers and buyers.
2026年10月7日6 分Hebei Haihao Group