Tube Expanders By Sarel Engineers

We are producing and supplying of Tube Epander in Mumbai, Maharashtra, India. After successful removal of tubes from reclaimed tubesheet, it is necessary to inspect tubesheet holes dimensionally to assess the deviation or variation of dimension with respect to its original tubesheet holes dimensions stated in drawing. It is observed that while retubing strength expanded tubesheets vary most in dimension than light expanded tube sheet holes. Due to higher limit of % of thinned tube expansion or marginally over-rolled tube, tube sheet holes are found oversize, oval ligaments disturbed or even digmarks in tubesheet holes. In such condition customer should not expect the same parameters established as earlier in original construction condition. It is a challenging work to carry out tube expansion according to the merit of individual hole dimensions. Tube expansion, whether fresh or retubed it is most important that the quality of tube expansion depends upon: 1. Quality Tube Expander Sets : 2. Appropriate parameters calculations of required working conditions 3. Alert attention of expansion operator 4. If the expander components are precisely manufactured in very close limit of tolerance with perfect heat treatment cycle observed to a special alloy steel recommended for the tube components then end results of expansion carried according to parameters fixed in mock-up holds good.