Boiler Tube Rolling Procedure

A stretching the tube radially and b imposing high unit rolling forces that cause the tube to extrude axially. Boiler tube installation new boiler tubes manufactured to meet or exceed specifications are installed rolled beaded and sometimes welded in the hot pass. Tube failures during the initial operation period the normal operation period and after ten to fifteen years operation show different trends.

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Of the tube against a fixed container.

Boiler tube rolling procedure.

The boiler is then closed and prepared to fire using all new gaskets. If the flaring roll starts to walk under the drum they back the tool out and place the mandrel in the expander tightly and finish the roll. Boiler testing qc ib m hydro tests the boiler witnessed by our authorized inspection agency. There are manufacturers who feel that rolling the tube with a flare roll expander only is the best procedure.

Boiler tubes 12 16 bwg 0 001 5. To ensure the best tool life and the highest quality tube to tube sheet contact. To assure a proper tube joint the tube wall must. Shop a wide range of tube expanders made in the usa for oem or retubing boilers condensers chillers and other pressure vessels.

This is time consuming and requires a tremendous amount of skill. They can be analyzed and corrective and preventive action can taken. Mechanical rolling reduces the tube wall by. There are twenty two primary reasons for tube failures in a boiler which can be classified under six major groups.

Drawing upon a full century of experience and expertise boiler tube company of america bta manufactures replacement pressure boiler components and related auxiliary industrial boiler parts for all sizes and styles of boilers regardless of original oem. They will take a flare roll expander and roll and flare the tubes to a tight tube joint. Such as rolling tubes into tube sheets drums ferrules or flanges. The tubes in the unit.

To roll tubes into tubesheets thicker than 2 you must step roll. The use of the torque control system will ensure the uniform tightness of all tubes. Call 1 718 729 3360 for expert help. Tube expanding is the art of reducing a tube wall by compressing the o d.

Welding procedures cleaning procedures step sequence for tube to tubesheet joint completion including welding special closefit per tema table rcb 7 41 inspection and test plan like quality plans inspection and test plans can vary with heat exchanger types but major steps can be seen in figure 6. Good operating and maintenance practice reduces tube failures. The rolling control is now set and ready to roll the rest of. Reroll all test tubes that were under size.