Index: src/Plugins/Wti/Wti.Forms/NodePresenters/PipingDataNodePresenter.cs
===================================================================
diff -u -ra3b93c36c2051bd6112327bff0d836ae7883737d -r1689206627a4343d07fafcebb0a931b7a0e9e2d2
--- src/Plugins/Wti/Wti.Forms/NodePresenters/PipingDataNodePresenter.cs	(.../PipingDataNodePresenter.cs)	(revision a3b93c36c2051bd6112327bff0d836ae7883737d)
+++ src/Plugins/Wti/Wti.Forms/NodePresenters/PipingDataNodePresenter.cs	(.../PipingDataNodePresenter.cs)	(revision 1689206627a4343d07fafcebb0a931b7a0e9e2d2)
@@ -88,14 +88,12 @@
 
         private void PerformPipingCalculation(PipingData pipingData)
         {
-            try
+            var calculationErrorMessages = PipingCalculationService.PerfromValidatedCalculation(pipingData);
+
+            foreach(var errorMessage in calculationErrorMessages) 
             {
-                PipingCalculationService.Calculate(pipingData);
+                LogManager.GetLogger(typeof(PipingData)).Error(String.Format(Resources.ErrorInPipingCalculation_0, errorMessage));
             }
-            catch (PipingCalculationException e)
-            {
-                LogManager.GetLogger(typeof(PipingData)).Error(String.Format(Resources.ErrorInPipingCalculation_0, e.Message));
-            }
             pipingData.NotifyObservers();
         }
 
Index: src/Plugins/Wti/Wti.Service/PipingCalculationService.cs
===================================================================
diff -u -r82e08784e174b6b2799fc19cc04e7d7aeb7b84e9 -r1689206627a4343d07fafcebb0a931b7a0e9e2d2
--- src/Plugins/Wti/Wti.Service/PipingCalculationService.cs	(.../PipingCalculationService.cs)	(revision 82e08784e174b6b2799fc19cc04e7d7aeb7b84e9)
+++ src/Plugins/Wti/Wti.Service/PipingCalculationService.cs	(.../PipingCalculationService.cs)	(revision 1689206627a4343d07fafcebb0a931b7a0e9e2d2)
@@ -15,10 +15,55 @@
         /// to the <see cref="PipingCalculationResult"/> if the calculation was successful.
         /// </summary>
         /// <param name="pipingData">The <see cref="PipingData"/> to base the input for the calculation upon.</param>
-        /// <exception cref="PipingCalculationException">Thrown when calling <see cref="Validate"/> would return a non empty <see cref="List{T}"/>.</exception>
-        public static void Calculate(PipingData pipingData)
+        /// <returns>A <see cref="List{T}"/> with all the messages that were returned due to validation errors in the given <paramref name="pipingData"/>
+        /// or error message that occurred when performing the calculation.</returns>
+        public static List<string> PerfromValidatedCalculation(PipingData pipingData)
         {
-            var input = new PipingCalculationInput(
+            var validationResults = Validate(pipingData);
+            if (validationResults.Count > 0)
+            {
+                ClearOutput(pipingData);
+                return validationResults;
+            }
+            try
+            {
+                Calculate(pipingData);
+            }
+            catch (PipingCalculationException e)
+            {
+                ClearOutput(pipingData);
+                return new List<string>{ e.Message };
+            }
+            return new List<string>();
+        }
+
+        private static void ClearOutput(PipingData pipingData)
+        {
+            pipingData.Output = null;
+        }
+
+        private static void Calculate(PipingData pipingData)
+        {
+            var input = CreateInputFromData(pipingData);
+            var pipingCalculation = new PipingCalculation(input);
+
+            var pipingResult = pipingCalculation.Calculate();
+
+            pipingData.Output = new PipingOutput(pipingResult.UpliftZValue,
+                                                 pipingResult.UpliftFactorOfSafety,
+                                                 pipingResult.HeaveZValue, pipingResult.HeaveFactorOfSafety, pipingResult.SellmeijerZValue, pipingResult.SellmeijerFactorOfSafety);
+        }
+
+        public static List<string> Validate(PipingData pipingData)
+        {
+            var input = CreateInputFromData(pipingData);
+
+            return new PipingCalculation(input).Validate();
+        } 
+
+        private static PipingCalculationInput CreateInputFromData(PipingData pipingData)
+        {
+            return new PipingCalculationInput(
                 pipingData.WaterVolumetricWeight,
                 pipingData.UpliftModelFactor,
                 pipingData.AssessmentLevel,
@@ -42,17 +87,6 @@
                 pipingData.BeddingAngle,
                 pipingData.ExitPointXCoordinate
                 );
-            var pipingCalculation = new PipingCalculation(input);
-            var pipingResult = pipingCalculation.Calculate();
-
-            pipingData.Output = new PipingOutput(pipingResult.UpliftZValue,
-                                                    pipingResult.UpliftFactorOfSafety,
-                                                    pipingResult.HeaveZValue, pipingResult.HeaveFactorOfSafety, pipingResult.SellmeijerZValue, pipingResult.SellmeijerFactorOfSafety);
         }
-
-        public static List<string> Validate(PipingData pipingData)
-        {
-            return null;
-        } 
     }
 }
\ No newline at end of file
Index: test/Plugins/Wti/Wti.Forms.Test/NodePresenters/PipingDataNodePresenterTest.cs
===================================================================
diff -u -ra3b93c36c2051bd6112327bff0d836ae7883737d -r1689206627a4343d07fafcebb0a931b7a0e9e2d2
--- test/Plugins/Wti/Wti.Forms.Test/NodePresenters/PipingDataNodePresenterTest.cs	(.../PipingDataNodePresenterTest.cs)	(revision a3b93c36c2051bd6112327bff0d836ae7883737d)
+++ test/Plugins/Wti/Wti.Forms.Test/NodePresenters/PipingDataNodePresenterTest.cs	(.../PipingDataNodePresenterTest.cs)	(revision 1689206627a4343d07fafcebb0a931b7a0e9e2d2)
@@ -365,13 +365,12 @@
             mockRepository.ReplayAll();
 
             var contextMenuAdapter = nodePresenter.GetContextMenu(null, pipingData) as MenuItemContextMenuStripAdapter;
-            var expectedMessage = "Piping berekening niet gelukt: Dtotal (total thickness) may not be 0." + Environment.NewLine + "Exception of type HeaveCalculator";
             
             // When
             Action action = () => contextMenuAdapter.ContextMenuStrip.Items[0].PerformClick();
 
             // Then
-            TestHelper.AssertLogMessageIsGenerated(action, expectedMessage, 1);
+            TestHelper.AssertLogMessagesCount(action, 6);
             Assert.IsNull(pipingData.Output);
             mockRepository.VerifyAll();
         }
Index: test/Plugins/Wti/Wti.Service.Test/PipingCalculationServiceTest.cs
===================================================================
diff -u -rcf31268a74ee4557e6ef9ccdcde7e5c48540ab8b -r1689206627a4343d07fafcebb0a931b7a0e9e2d2
--- test/Plugins/Wti/Wti.Service.Test/PipingCalculationServiceTest.cs	(.../PipingCalculationServiceTest.cs)	(revision cf31268a74ee4557e6ef9ccdcde7e5c48540ab8b)
+++ test/Plugins/Wti/Wti.Service.Test/PipingCalculationServiceTest.cs	(.../PipingCalculationServiceTest.cs)	(revision 1689206627a4343d07fafcebb0a931b7a0e9e2d2)
@@ -36,23 +36,23 @@
         public void Calculate_ValidPipingData_ShouldSetOutput()
         {
             // Call
-            PipingCalculationService.Calculate(validPipingData);
+            PipingCalculationService.PerfromValidatedCalculation(validPipingData);
 
             // Assert
             Assert.NotNull(validPipingData.Output);
         }
 
         [Test]
-        public void Calculate_InValidPipingData_ThrowsException()
+        public void Calculate_InValidPipingData_ReturnsErrorMessages()
         {
             // Setup
             var invalidPipingData = new PipingData();
 
             // Call
-            TestDelegate testDelegate = () => PipingCalculationService.Calculate(invalidPipingData);
+            var results = PipingCalculationService.PerfromValidatedCalculation(invalidPipingData);
             
             // Assert
-            Assert.Throws<PipingCalculationException>(testDelegate);
+            CollectionAssert.IsNotEmpty(results);
         }
     }
 }
\ No newline at end of file