ESDU 95007 extends the information in ESDU 92013 so providing updated budget cost estimates for gasketed and semi-welded plate-and-frame exchangers obtained from an analysis of results obtained using costing methods of two UK manufacturers. The costs are related to 'standard' designs for a range of hot and cold streams@ including boiling and condensing flows@ based on a typical fluid pressure and specific@ most commonly-used plate and gasket materials. Cost factors are also provided which@ applied to the costs of the 'standard' designs@ account for variations in pressure@ plate and gasket materials and plate construction. A comparison is made with the results from ESDU 92013 and 94042 for shell-and-tube exchangers for the same duty. The advantages of plate-and-frame exchangers are discussed@ and exchanger and plate designs available are illustrated. Details of the calculation procedures used are provided. Worked examples illustrate the use of the method.