WN Weld Neck Flanges
- Standards
- ASME B16.5, ASME B16.47, ANSI
- Size range
- NPS 1/2–24 (B16.5); NPS 26–60 (B16.47)
- Pressure
- Class 150, Class 300, Class 600
- Materials
- ASTM A105, A350 LF2
Company
About H1 Flange
A forged flange manufacturer for industrial procurement teams who specify by type, standard, material, and pressure class.
Legal name
Company profile
H1 Flange · 山西衡一法兰有限公司
H1 Flange is the export brand of Shanxi Hengyi Flange Co., Ltd. (山西衡一法兰有限公司). The factory forges, heat-treats, machines, drills, marks, and packs flanges for project and MRO buyers. Pages stay specification-led: type, standard, size range, pressure class, material, facing, and a direct RFQ.
- Product families
- 7 forged flange types
- Standards coverage
- ASME, ANSI, DIN, EN, JIS, GB/T
- Process scope
- Forge to export packing
- Market pages
- China, North America, DACH, GCC, South America
Manufacturing and inspection
Manufacturing process
The sequence below is the usual industrial path. Inspection scope follows the purchase order or drawing.
Products
Flange types
Open a type page for standards, size range, pressure class, materials, and RFQ.
WN 
SO Slip-On Flanges
- Standards
- ASME B16.5, ANSI, DIN
- Size range
- NPS 1/2–24; DN 15–600
- Pressure
- Class 150, Class 300, PN10
- Materials
- ASTM A105, A182 F304/F316
BL Blind Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- NPS 1/2–24 (B16.5); larger on request
- Pressure
- Class 150, Class 300, Class 600
- Materials
- ASTM A105, A350 LF2
SW Socket Weld Flanges
- Standards
- ASME B16.5, ANSI
- Size range
- NPS 1/2–4
- Pressure
- Class 150, Class 300, Class 600
- Materials
- ASTM A105, A182 F304/F316
THD Threaded Flanges
- Standards
- ASME B16.5, ANSI
- Size range
- NPS 1/2–4, larger on request
- Pressure
- Class 150, Class 300
- Materials
- ASTM A105, A182 F304/F316
LJ Lap Joint Flanges
- Standards
- ASME B16.5, ANSI
- Size range
- NPS 1/2–24
- Pressure
- Class 150, Class 300
- Materials
- ASTM A105, A182 F304/F316
CF Custom Forged Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- Per drawing
- Pressure
- Per specification
- Materials
- ASTM A105, A350 LF2