When laying Ezepipe™ composite pipes in hazardous areas, e.g. at risk from corrosive gases or permanent humidity, the metal couplings must be protected. This can be done, by wrapping the fittings with the appropriate anti-corrosion tape or heat shrinking materials, according to DIN 1988/7.
Expansion loops
Example: Required: length of the expansion bend Given: longitudinal expansion DI = 10mm Outer pipe diameter d=26mm Solution: b = 532 mm
Changes in pipe lengths must be taken into account for Non-hiddenpipes
Generally, the thermal expansion/shrinkage is regulated either by a suitable layout (expansion bends when changing directions). Or by expansion compensation (expansion loops and below expansion joints). The choice and location of pipe supports (sliding clips and fixed points) depends on the current situation. Expansion bends to compensate for pipe expansion are the natural result of changing direction or right-angled connections, sliding and fixed clips must be used correctly
Determining the length of the expansion bend
The change in the pipe’s length and its outer diameter effect the length of the expansion bend.
Calculating the expansion bend
The minimum length of the expansion bend can be obtained from following the diagram, i.e. formula
b = k x (d x I)Δ0.5
b = length of the expansion bend
d = outside diameter in mm (see diagram)
k = material-dependant constant (=33)
ΔI = Longditudinal expansion in mm (see diagram
Given: longitudinal expansion ΔI = 10mm, outer pipe d = 26mm k = 33
Solution: b = 33 x (26 x 10)0.5 b = 532 mm |
