Long neck butt welding flange
Long neck butt welding flange, Total:2 items.
The international standard classification for "Long neck butt welding flange" includes: .
The Chinese standard classification for "Long neck butt welding flange" includes: .
Professional Standard - Energy
- NB/T 47023-2012 Welding neck flange
Professional Standard - Machinery
- JB/T 4703-2000 Welding neck flange
