Tubesheet working process
Tubesheet is one of the main components of shell-and-tube heat exchangers. It is used to arrange heat exchangers to separate the tube-side,shell-side fluid,at the same time,it is affected by the he tube-side and shell-side pressure and temperature.
The following is the entire operation process of our factory.
1. Lathe processing tube sheet
2. marking and dot
3. drilling processing
4. Welded joints: including welds, fusion zones, heat affected zones
Weld: It is formed by solidification and crystallization of liquid metal in the molten pool. It usually consists of a filler metal and a part of the base metal.
Fusion zone: The heating temperature is between the solid phase and the liquidus of the alloy, and the chemical composition and microstructure are not uniform, so it is thin and easy to produce weld cracks.
Heat-affected zone: the base metal on both sides of the weld, where the metallographic structure and mechanical properties change due to the welding heat.
Two opposite weldings by manual argon arc welding or arc welding
5. Tube expansion
The tube end portion of the tube extending into the tube plate is extruded by the expander, and the tube end is plastically deformed, and the tube plate hole simultaneously generates a certain pressing force, and is adhered together to achieve the purpose of sealing and fastening connection.
Clean the surface of the tube head tube to prevent the dirt and other dirt from affecting the experimental results.
Haihao Group manufacture & supply tubesheet in different dimansions,materials,standards.We also can supply other piping products such as butt welding pipe fittings,forged pipe fittings,steel pipes and flanges.If you want to know more about our products,please email us:firstname.lastname@example.org