Every article on this site is written or reviewed by Ma Yajiada, our chief engineer since 2006. He holds a B.Sc. in Materials Engineering from Yanshan University, is a PED 2014/68/EU Module H Notified Body auditor, and has personally audited over 4,000 flange shipments. He is not an AI tool. We use AI to draft, but every paragraph is hand-edited by Ma Yajiada, then run through the MTC of an actual recent shipment before we publish. Yes, it's slow. That's the point.
Last audited by Ma Yajiada, PE. Internal review process: draft to technical review to MTC cross-check to publish. If you spot something that looks off, email mafuze@hebeiyagada.com - we will fix it the same day.
A note on this page: we wrote it ourselves. The technical numbers (Class 150 equals 285 PSI at 100 deg F, NPS ranges, material grades) come from ASME B16.5-2020 and the actual mill test certificates we ship with our products. We do not paraphrase other people's specs - we cite the standard directly.
A105 / A350 LF2 weld-neck connections, Class 600–2500, RTJ sealing for crude unit reactors and hydrocracker piping. Export-ready NDT per ASME B31.3. Supplied to Bandar Abbas (Iran), Yanbu (Saudi Arabia), Jebel Ali (UAE).
16MnDR low-temperature steel (-46°C Charpy impact certified) per GB 150 / EN 13480. Supplied to Yamal LNG, QatarEnergy, South Pars. Buy 16MnDR connections for cryogenic service from yagada.
A182 F11 / F22 Cr-Mo alloy weld-neck joints for 540°C+ main steam, hot reheat, and feedwater lines per ASME B16.5 / II-A. Vietnam, Indonesia, Bangladesh coal-fired plants.
Duplex F51/F55 / Super Duplex F53/F55 components with NACE MR0175 sour-service compliance for North Sea, Persian Gulf, and West Africa offshore platforms.
Stainless steel 304 / 316 / 316L / 321 / 347 connections for corrosive media. Hastelloy C276 / Monel / Alloy 20 available for HCl, H₂SO₄, HF service.
Hard-overlay weld-neck joints with EPDM / natural rubber / polyurethane liners for Warman pump manifolds. Chilean copper / Australian iron ore / South African platinum mines.