Stainless Steel Tube-in-Tube Heat Exchangers Two identical tube-in-tube heat exchangers constructed from stainless steel, each with the following specifications: Shell Diameter: 200 mm Length: 2.0 meters Inner Tubes: 10 tubes per unit Inner Tube Diameter: 20 mm (nominal) Tube Length: 2.0 meters Configuration: Tube-in-tube (10 inner tubes housed within a single outer shell) Material: Stainless steel (grade to be specified) Approximate Heat Transfer Surface Area: Per Unit: ~1.26 m² Total (2 Units): ~2.52 m²