diff --git a/src/StdPrs/StdPrs_Isolines.cxx b/src/StdPrs/StdPrs_Isolines.cxx
index 6df065af5d..8a7227fb68 100644
--- a/src/StdPrs/StdPrs_Isolines.cxx
+++ b/src/StdPrs/StdPrs_Isolines.cxx
@@ -589,10 +589,14 @@ void StdPrs_Isolines::UVIsoParameters (const TopoDS_Face&      theFace,
 
   BRepTools::UVBounds (theFace, aUmin, aUmax, aVmin, aVmax);
 
-  aUmin = Max (aUmin, -theUVLimit);
-  aUmax = Min (aUmax,  theUVLimit);
-  aVmin = Max (aVmin, -theUVLimit);
-  aVmax = Min (aVmax,  theUVLimit);
+  if (Precision::IsInfinite (aUmin))
+    aUmin = -theUVLimit;
+  if (Precision::IsInfinite (aUmax))
+    aUmax = theUVLimit;
+  if (Precision::IsInfinite (aVmin))
+    aVmin = -theUVLimit;
+  if (Precision::IsInfinite (aVmax))
+    aVmax = theUVLimit;
 
   TopLoc_Location aLocation;
   const Handle(Geom_Surface)& aSurface = BRep_Tool::Surface (theFace, aLocation);
diff --git a/tests/v3d/face/G1 b/tests/v3d/face/G1
new file mode 100644
index 0000000000..b91b28057c
--- /dev/null
+++ b/tests/v3d/face/G1
@@ -0,0 +1,11 @@
+# isolines on infinite cylinder
+# maximum parameter value for a view sets UV limit for isolines on infinite object
+
+cylinder c 0 0 0 0 0 1 10
+mkface f c
+
+vinit
+vdisplay -dispMode 0 f
+vaspects -defaults -setMaxParamValue 10
+visos f 10 4 1
+vfit
diff --git a/tests/v3d/face/G2 b/tests/v3d/face/G2
new file mode 100644
index 0000000000..20d68ba069
--- /dev/null
+++ b/tests/v3d/face/G2
@@ -0,0 +1,11 @@
+puts "========"
+puts "0029356: Modeling Algorithms - GCPnts_TangentialDeflection hangs on specific curve"
+puts "========"
+
+if {[info commands testreadiges] == ""} {pload XSDRAW}
+testreadiges [locate_data_file bug29356.igs] a
+
+vinit View1
+vdisplay -dispMode 0 a
+visos a 12 6 1
+vfit
diff --git a/tests/v3d/face/G3 b/tests/v3d/face/G3
new file mode 100644
index 0000000000..5f6968f5e6
--- /dev/null
+++ b/tests/v3d/face/G3
@@ -0,0 +1,23 @@
+# isolines on infinite prism based on spline edge with poles closed to 1.4e+6
+
+if {[info commands testreadiges] == ""} {pload XSDRAW}
+testreadiges [locate_data_file bug29356.igs] a
+
+mksurface s a
+viso c s 0
+dump c
+mkedge e c
+
+haxo
+donly e
+prism r e 0 1 0 Inf
+fit
+xbounds r
+
+vinit
+vdisplay r
+visos r 2 3 1
+vfit
+vzoom 3000
+
+vdump $imagedir/${casename}_zoom.png
diff --git a/tests/v3d/face/G4 b/tests/v3d/face/G4
new file mode 100644
index 0000000000..da03c8eb1c
--- /dev/null
+++ b/tests/v3d/face/G4
@@ -0,0 +1,20 @@
+# isolines on finite prism based on spline edge with poles closed to 1.4e+6
+
+if {[info commands testreadiges] == ""} {pload XSDRAW}
+testreadiges [locate_data_file bug29356.igs] a
+
+mksurface s a
+viso c s 0
+dump c
+mkedge e c
+
+haxo
+donly e
+prism r e 0 1 0 Fin
+fit
+xbounds r
+
+vinit
+vdisplay r
+visos r 2 2 1
+vfit