ASTM A182 F304H WNRF Flange & Forged Ring for UAE Cryogenic Service

Haihao Group has finished manufacturing, inspection and shipment of a special stainless steel package for an engineering client in the UAE. This order combines ASTM A182 F304H WNRF flange and custom forged rings, tailored for demanding cryogenic piping conditions where standard stainless steel fittings cannot meet strict material acceptance criteria.

The ASTM A182 F304H WNRF flange supplied here is 12 inch, Class 600, SCH 80, built to ASME B16.5. A notable custom feature is the unbeveled square ends, machined flat rather than prepared for conventional butt weld beveling. This special end configuration was specified directly by the client’s drawing to fit their site welding and assembly workflow.

Matching the flanges are solid forged rings, sized 165 mm OD × 120 mm ID × 85 mm length, also in ASTM A182 F304H. All components go through controlled heat treatment to lock in the required microstructure, a critical step for this cryogenic-grade batch. The material package must pass intergranular corrosion testing, with ferrite content held between 2% and 8%, and grain size controlled at 6 or finer.

ASTM A182 F304H WNRF flange with unbeveled square ends and forged ring, cryogenic stainless steel for UAE project

For low-temperature performance validation, every heat lot is tested at -196°C. The acceptance criteria include minimum elongation of 14%, transverse expansion over 0.38 mm on impact specimens. These tight limits separate this ASTM A182 F304H WNRF flange from regular 304H flange stock, as many general suppliers only offer standard room temperature certificates without full cryogenic qualification.

We ran separate test sequences for the flanges and forged rings to avoid mixing test records. Heat numbers, IGC reports, low-temperature impact charts and ferrite check logs are bundled with the shipment documents. UAE EPC teams working on LNG, cryo storage and cold process lines often need this level of traceability before material release.

If you are sourcing ASTM A182 F304H WNRF flange or matching forged rings for cryogenic service across the Middle East, we can review your special requirements including unbeveled ends, ferrite control, IGC and cryogenic impact tests. Send your specifications or drawings for a targeted quotation.