Effective protection against corrosion
Steel tube offers a readily galvanised substrate for cost effective corrosion protection. Galvanised offers good abrasion resistance during handling and the nature of the coating allows for corrosion protection even when the coating layer is compromised down to the steel substrate.
Steel tubes lend themselves to the easy application of a variety of paints and coatings for the most arduous of conditions. This unique ability makes steel tube the material of choice where composite conveyance systems are required with high strength, low mass and good corrosion resistance.
Together, the above properties result in thinner pipes and therefore:
- Less mass.
- Less labour in laying.
- Greater capacity for the same outside diameter.
- Greater pressure rating for a given wall thickness.
In addition steel pipes offer:
Greater choice of joints.
A wide variety of joints are available for steel pipes ranging from those with considerable flexibility to others with complete rigidity, namely:
- Welded joints
- Klambon joints
- Flange joints
- Threaded and coupled
not to mention many other jointing systems. Steel tubes with Klambon couplings, or screwed and socketed to SABS 62, are commonly used in service reticulation systems.
The wide range of available joints gives every variation that may be required in practice, from complete rigidity to angular and longitudinal flexibility, to meet the special purposes and conditions that are involved in conveying water.
Greater carrying capacity
For a given pressure, steel pipes can be made much thinner than pipes of other materials. Consequently they have a greater carrying capacity than pipes of other materials with the same outside diameter.
Considerable indirect savings can result from using steel pipes, because they are not subject to the breakages in transit and attendant replacement delays that occur when pipes manufactured from other materials are used resulting in fewer delays in installation.