1. Neck butt welding flange refers to a flange with a tapered neck and butt welding with the cylinder or pipe. is an integral flange;The full name of the flat neck flange is the steel pipe flange with neck flat welding.
2. The welding seam between the necked butt welding flange and the pipe is a girth weld;The welding seam between the pipe and the flange with the neck flat welding flange is the fillet weld.
3. The material of butt welding flange with neck is mostly machined from forged steel;The material of the flat welding flange with neck is machined from ordinary steel plate with a thickness that meets the requirements.
4. The welding seam connecting the necked butt welding flange and the pipe is a Class B seam;The welding seam connecting the necked flat welding flange and the nozzle is a C-type seam, and the non-destructive testing after welding is different.
5. The nominal pressure of butt welding flange with neck is: 1–25MPa grade;The nominal pressure of flat welding flange with neck is: 0.6—4.0MPa.
6. The diameter of the butt welding flange with neck is greater than 250mm and needs to be tested, so the cost is relatively high;The large inner diameter of the neck flange means low weight and low cost.
Post time: May-24-2022