TehnikaTehnika
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.
15. okt 2026.5 minHebei Haihao Group
Uvidi
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Pošalji RFQ342 članaka
Tehnika
Vodič za kupceVodič za kupce
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.
14. okt 2026.6 minHebei Haihao Group
StandardiStandardi
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.
13. okt 2026.6 minHebei Haihao Group
TehnikaTehnika
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.
12. okt 2026.6 minHebei Haihao Group
Vodič za kupceVodič za kupce
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.
11. okt 2026.6 minHebei Haihao Group
StandardiStandardi
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.
10. okt 2026.6 minHebei Haihao Group
TehnikaTehnika
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.
9. okt 2026.6 minHebei Haihao Group
Vodič za kupceVodič za kupce
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.
8. okt 2026.5 minHebei Haihao Group
StandardiStandardi
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.
7. okt 2026.6 minHebei Haihao Group