Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingCalculation.cs
===================================================================
diff -u -r81fa8a9bf3bd503cbd280e88b8f6037a840cff12 -r3cf4d4c65cf2ce285bdeb71162cf3b0a79cb3742
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingCalculation.cs	(.../PipingCalculation.cs)	(revision 81fa8a9bf3bd503cbd280e88b8f6037a840cff12)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingCalculation.cs	(.../PipingCalculation.cs)	(revision 3cf4d4c65cf2ce285bdeb71162cf3b0a79cb3742)
@@ -30,7 +30,7 @@
     /// <summary>
     /// This class holds information about a calculation for the <see cref="PipingFailureMechanism"/>.
     /// </summary>
-    public class PipingCalculation : Observable, ICalculation
+    public class PipingCalculation : Observable, ICalculation, ICloneable
     {
         /// <summary>
         /// Creates a new instance of <see cref="PipingCalculation"/> with default values set for some of the parameters.
@@ -70,12 +70,32 @@
             }
         }
 
-        public Comment Comments { get; }
+        public Comment Comments { get; private set; }
 
         public void ClearOutput()
         {
             Output = null;
             SemiProbabilisticOutput = null;
         }
+
+        public object Clone()
+        {
+            var clone = (PipingCalculation) MemberwiseClone();
+
+            clone.Comments = (Comment) Comments.Clone();
+            clone.InputParameters = (PipingInput) InputParameters.Clone();
+
+            if (Output != null)
+            {
+                clone.Output = (PipingOutput) Output.Clone();
+            }
+
+            if (SemiProbabilisticOutput != null)
+            {
+                clone.SemiProbabilisticOutput = (PipingSemiProbabilisticOutput) SemiProbabilisticOutput.Clone();
+            }
+
+            return clone;
+        }
     }
 }
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