diff --git a/src/HLRAppli/HLRAppli_ReflectLines.cxx b/src/HLRAppli/HLRAppli_ReflectLines.cxx
index 2b34bba448..9f1a0e95b2 100644
--- a/src/HLRAppli/HLRAppli_ReflectLines.cxx
+++ b/src/HLRAppli/HLRAppli_ReflectLines.cxx
@@ -70,16 +70,36 @@ void HLRAppli_ReflectLines::SetAxes(const Standard_Real Nx,
 
 void HLRAppli_ReflectLines::Perform()
 {
-  Handle(HLRBRep_Algo) aHLRAlgo = new HLRBRep_Algo();
-  aHLRAlgo->Add( myShape, 0 );
-  aHLRAlgo->Projector( myProjector );
-  aHLRAlgo->Update();
-  aHLRAlgo->Hide();
+  myHLRAlgo = new HLRBRep_Algo();
+  myHLRAlgo->Add( myShape, 0 );
+  myHLRAlgo->Projector( myProjector );
+  myHLRAlgo->Update();
+  myHLRAlgo->Hide();
+
+  /*
   HLRBRep_HLRToShape aHLRToShape( aHLRAlgo );
 
   myCompound = aHLRToShape.OutLineVCompound3d();
 
   BRepLib::SameParameter(myCompound,Precision::PConfusion(),Standard_False);
+  */
+}
+
+//=======================================================================
+//function : GetCompoundOf3dEdges
+//purpose  :
+//=======================================================================
+
+TopoDS_Shape HLRAppli_ReflectLines::GetCompoundOf3dEdges(const HLRBRep_TypeOfResultingEdge type,
+                                                         const Standard_Boolean            visible)
+{
+  HLRBRep_HLRToShape aHLRToShape( myHLRAlgo );
+
+  TopoDS_Shape theCompound = aHLRToShape.CompoundOfEdges(type, visible, Standard_True);
+
+  BRepLib::SameParameter(theCompound,Precision::PConfusion(),Standard_False);
+
+  return theCompound;
 }
 
 //=======================================================================
@@ -87,7 +107,7 @@ void HLRAppli_ReflectLines::Perform()
 //purpose  :
 //=======================================================================
 
-TopoDS_Shape HLRAppli_ReflectLines::GetResult() const
+TopoDS_Shape HLRAppli_ReflectLines::GetResult()
 {
-  return myCompound;
+  return GetCompoundOf3dEdges(HLRBRep_OutLine, Standard_True);
 }
diff --git a/src/HLRAppli/HLRAppli_ReflectLines.hxx b/src/HLRAppli/HLRAppli_ReflectLines.hxx
index 13005f25f4..bedbcc7898 100644
--- a/src/HLRAppli/HLRAppli_ReflectLines.hxx
+++ b/src/HLRAppli/HLRAppli_ReflectLines.hxx
@@ -22,6 +22,8 @@
 #include <Standard_Handle.hxx>
 
 #include <HLRAlgo_Projector.hxx>
+#include <HLRBRep_Algo.hxx>
+#include <HLRBRep_TypeOfResultingEdge.hxx>
 #include <TopoDS_Shape.hxx>
 #include <Standard_Real.hxx>
 class TopoDS_Shape;
@@ -49,8 +51,13 @@ public:
   
   //! returns resulting compound of reflect lines
   //! represented by edges in 3d
-  Standard_EXPORT TopoDS_Shape GetResult() const;
+  Standard_EXPORT TopoDS_Shape GetResult();
 
+  //! returns resulting compound of lines
+  //! of specified type and visibility
+  //! represented by edges in 3d
+  Standard_EXPORT TopoDS_Shape GetCompoundOf3dEdges(const HLRBRep_TypeOfResultingEdge type,
+                                                    const Standard_Boolean            visible);
 
 
 
@@ -65,8 +72,9 @@ private:
 
 
   HLRAlgo_Projector myProjector;
+  Handle(HLRBRep_Algo) myHLRAlgo;
   TopoDS_Shape myShape;
-  TopoDS_Shape myCompound;
+  //TopoDS_Shape myCompound;
 
 
 };
diff --git a/src/HLRTest/HLRTest.cxx b/src/HLRTest/HLRTest.cxx
index cd69e3d7db..84c492a9d1 100644
--- a/src/HLRTest/HLRTest.cxx
+++ b/src/HLRTest/HLRTest.cxx
@@ -29,6 +29,8 @@
 #include <HLRTopoBRep_OutLiner.hxx>
 #include <TColStd_ListIteratorOfListOfInteger.hxx>
 #include <TopoDS_Shape.hxx>
+#include <TopoDS_Compound.hxx>
+#include <BRep_Builder.hxx>
 
 static Handle(HLRBRep_Algo) hider;
 #ifdef _WIN32
@@ -449,6 +451,53 @@ static Standard_Integer reflectlines(Draw_Interpretor& , Standard_Integer n, con
   return 0;
 }
 
+//=======================================================================
+//function : hlrin3d
+//purpose  : 
+//=======================================================================
+
+static Standard_Integer hlrin3d(Draw_Interpretor& , Standard_Integer n, const char** a)
+{
+  if (n < 6)
+    return 1;
+
+  TopoDS_Shape aShape =  DBRep::Get(a[2]);
+  if (aShape.IsNull())
+    return 1;
+
+  Standard_Real anAISViewProjX = atof(a[3]);
+  Standard_Real anAISViewProjY = atof(a[4]);
+  Standard_Real anAISViewProjZ = atof(a[5]);
+  
+  gp_Pnt anOrigin(0.,0.,0.);
+  gp_Dir aNormal(anAISViewProjX, anAISViewProjY, anAISViewProjZ);
+  gp_Ax2 theAxes(anOrigin, aNormal);
+  gp_Dir aDX = theAxes.XDirection();
+
+  HLRAppli_ReflectLines Reflector(aShape);
+
+  Reflector.SetAxes(aNormal.X(), aNormal.Y(), aNormal.Z(),
+                    anOrigin.X(), anOrigin.Y(), anOrigin.Z(),
+                    aDX.X(), aDX.Y(), aDX.Z());
+
+  Reflector.Perform();
+
+  TopoDS_Compound Result;
+  BRep_Builder BB;
+  BB.MakeCompound(Result);
+  
+  TopoDS_Shape SharpEdges = Reflector.GetCompoundOf3dEdges(HLRBRep_Sharp, Standard_True);
+  BB.Add(Result, SharpEdges);
+  TopoDS_Shape OutLines = Reflector.GetCompoundOf3dEdges(HLRBRep_OutLine, Standard_True);
+  BB.Add(Result, OutLines);
+  TopoDS_Shape SmoothEdges = Reflector.GetCompoundOf3dEdges(HLRBRep_Rg1Line, Standard_True);
+  BB.Add(Result, SmoothEdges);
+  
+  DBRep::Set(a[1], Result);
+
+  return 0;
+}
+
 //=======================================================================
 //function : Commands
 //purpose  : 
@@ -477,6 +526,10 @@ void HLRTest::Commands (Draw_Interpretor& theCommands)
                   "reflectlines res shape proj_X proj_Y proj_Z",
                   __FILE__, reflectlines, g);
   
+  theCommands.Add("hlrin3d",
+                  "hlrin3d res shape proj_X proj_Y proj_Z",
+                  __FILE__, hlrin3d, g);
+  
   hider = new HLRBRep_Algo();
 }
 
diff --git a/tests/bugs/modalg_6/bug27280 b/tests/bugs/modalg_6/bug27280
new file mode 100644
index 0000000000..a4e5cce4e4
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27280
@@ -0,0 +1,16 @@
+puts "============"
+puts "OCC27280"
+puts "============"
+puts ""
+###########################################################################################################
+# HLR algorithms taking seam edges into account
+###########################################################################################################
+
+restore [locate_data_file bug27280_SeamTest0_modified.brep] a
+fit
+hlrin3d result a 0.57735026918962573 -0.57735026918962573 0.57735026918962584
+donly result
+
+checkshape result
+
+checknbshapes result -compound 4 -edge 7 -vertex 6