Tips for selecting expansion joint

The expansion joint   adopts  a  rectangular  cross-section  and  rounded  corrugated  shape . A    single  expansion  joint  in  the   pipeline   can  withstand   displacement   in   two   dimensions. The  elbow-jointed  pipeline composed  of   two  expansion   joints   can   withstand   displacement    in  three dimensions.  The  rectangular    rounded  metal    corrugated   expansion   joint   has  full   height  and   half  height  types. Users  can  choose  multiple  corrugated  joints  according  to  the  flue  size   and   stress    and  strain requirements.

1. After   the  user  has  selected  a  suitable  expansion   joint  according  to  the   thermal   displacement   of  the  pipe  system,  he  or  she must at least provide the circulating medium in  the  pipe, the  design   pressure of  the  smoke  and  air  duct, the  upper  temperature limit  during  operation, the  external  dimensions of  the  smoke  and air  duct cross section, the selected  waveform  and  wave  number,  so  as  to  carry   out   the   structural   design and manufacture of the expansion joint.

2. The upper limit of the allowable expansion of each wave: full-height type △α=±24mm half-height type △α=±12mm.

3. Dust-blocking plate: It is not necessary to use it for air ducts or pipes with little dust, but it should be used for dusty flues.

4. In order to reduce the number of corrugated nodes, cold drawing by 50% should be considered.

5. The expansion joint is suitable for the occasions where the cross-sectional area is less than 4.6 square meters and one side of the smoke and air duct is less than 1.5m but greater than 0.6mm. The standard full-height corrugated compensator is suitable for all smoke and air ducts.

​