diff --git a/pyroll/core/__init__.py b/pyroll/core/__init__.py
index 3e2bfbc6..5f686ad7 100644
--- a/pyroll/core/__init__.py
+++ b/pyroll/core/__init__.py
@@ -12,7 +12,7 @@
 from .disk_elements import DiskElementUnit
 from .config import Config, config
 
-VERSION = "2.1.4"
+VERSION = "2.1.5"
 
 root_hooks.extend(
     [
diff --git a/pyroll/core/transport/cooling_pipe.py b/pyroll/core/transport/cooling_pipe.py
index 021bfb56..d646bcff 100644
--- a/pyroll/core/transport/cooling_pipe.py
+++ b/pyroll/core/transport/cooling_pipe.py
@@ -7,15 +7,23 @@
 class CoolingPipe(Transport):
     """Represents a smooth cooling pipe."""
 
-    inner_diameter = Hook[float]()
-    """Inner diameter of the cooling pipe"""
+    inner_radius = Hook[float]()
+    """Inner radius of the cooling pipe."""
 
-    cooling_water_volume_flux = Hook[float]()
-    """Volume flux of the cooling water"""
+    cross_section_area = Hook[float]()
+    """Inner cross section area of the cooling pipe."""
 
-    cooling_water_temperature = Hook[float]()
-    """Temperature of the cooling water"""
+    coolant_flow_cross_section = Hook[float]()
+    """Difference between profile and cooling pipe cross-section."""
 
+    coolant_volume_flux = Hook[float]()
+    """Volume flux of the coolant."""
+
+    coolant_velocity = Hook[float]()
+    """Velocity of the coolant."""
+
+    coolant_temperature = Hook[float]()
+    """Temperature of the coolant."""
 
     @property
     def disk_elements(self) -> List['CoolingPipe.DiskElement']:
diff --git a/pyroll/core/transport/hookimpls/__init__.py b/pyroll/core/transport/hookimpls/__init__.py
new file mode 100644
index 00000000..e61dbc03
--- /dev/null
+++ b/pyroll/core/transport/hookimpls/__init__.py
@@ -0,0 +1,2 @@
+from . import transport
+from . import cooling_pipe
diff --git a/pyroll/core/transport/hookimpls/cooling_pipe.py b/pyroll/core/transport/hookimpls/cooling_pipe.py
new file mode 100644
index 00000000..e59ed63c
--- /dev/null
+++ b/pyroll/core/transport/hookimpls/cooling_pipe.py
@@ -0,0 +1,24 @@
+import numpy as np
+from ..cooling_pipe import CoolingPipe
+
+
+@CoolingPipe.inner_radius
+def inner_radius(self: CoolingPipe):
+    if self.has_set_or_cached("cross_section_area"):
+        return np.sqrt(self.cross_section_area / np.pi)
+
+
+@CoolingPipe.cross_section_area
+def cross_section_area(self: CoolingPipe):
+    if self.has_set_or_cached("inner_radius"):
+        return self.inner_radius ** 2 * np.pi
+
+
+@CoolingPipe.coolant_flow_cross_section
+def coolant_flow_cross_section(self: CoolingPipe):
+    return self.cross_section_area - self.in_profile.cross_section.area
+
+
+@CoolingPipe.coolant_velocity
+def coolant_velocity(self: CoolingPipe):
+    return self.coolant_volume_flux / self.coolant_flow_cross_section
diff --git a/pyroll/core/transport/hookimpls.py b/pyroll/core/transport/hookimpls/transport.py
similarity index 94%
rename from pyroll/core/transport/hookimpls.py
rename to pyroll/core/transport/hookimpls/transport.py
index 5656f995..28fef6d5 100644
--- a/pyroll/core/transport/hookimpls.py
+++ b/pyroll/core/transport/hookimpls/transport.py
@@ -1,4 +1,4 @@
-from .transport import Transport
+from ..transport import Transport
 
 
 @Transport.OutProfile.strain
@@ -31,7 +31,7 @@ def length_from_roll_pass_positions(self: Transport, cycle):
     if cycle:
         return None
 
-    from ..roll_pass import RollPass
+    from ...roll_pass import RollPass
     next_pass = self.next_of(RollPass)
     prev_pass = self.prev_of(RollPass)
 
diff --git a/tests/cooling_pipe/test_cooling_pipe_values.py b/tests/cooling_pipe/test_cooling_pipe_values.py
new file mode 100644
index 00000000..bd3a7758
--- /dev/null
+++ b/tests/cooling_pipe/test_cooling_pipe_values.py
@@ -0,0 +1,59 @@
+import numpy as np
+import pytest
+from matplotlib import pyplot as plt
+from numpy import pi, isclose, rad2deg
+
+from pyroll.core import CoolingPipe, PassSequence, Profile
+
+
+def test_cooling_pipe_radius():
+    cp = CoolingPipe(
+        label="Cooling Pipe",
+        cross_section_area=10,
+    )
+    assert np.isclose(cp.inner_radius, 1.784124)
+
+
+def test_cooling_pipe_area():
+    cp = CoolingPipe(
+        label="Cooling Pipe",
+        inner_radius=1.784124,
+    )
+    assert np.isclose(cp.cross_section_area, 10)
+
+
+def test_cooling_pipe_coolant_velocity():
+    ip = Profile.round(
+        radius=0.5
+    )
+
+    seq = PassSequence([
+        CoolingPipe(
+            label="Cooling Pipe",
+            inner_radius=1,
+            coolant_volume_flux=1,
+            velocity=1,
+            length=1
+        )])
+
+    seq.solve(ip)
+
+    assert np.isclose(seq[0].coolant_velocity, 0.42418615)
+
+
+def test_cooling_pipe_coolant_flow_cross_section():
+    ip = Profile.round(
+        radius=0.5
+    )
+
+    seq = PassSequence([
+        CoolingPipe(
+            label="Cooling Pipe",
+            inner_radius=1,
+            coolant_volume_flux=1,
+            velocity=1,
+            length=1
+        )])
+    seq.solve(ip)
+
+    assert np.isclose(seq[0].coolant_flow_cross_section, 2.357455)