Page 56 - Building services book

Mild Steel

Specification Advantages Disadvantages

 Galvanised or  High tensile strengh, • Welded joints

ungalvanised used for high pressure required skilled

 Former used for hot Available in long installers and special

and cold water lengths up to 13.5 m equipment
installation and for Can be welded to form •Susceptible to

heating installation a leak-free system that corrosion if protection

 Grade A for waste, will resist end load systems damaged

ventilation and  Pipe impermeable to •Repair maybe

overflow pipe. gas and organic problematical if non

 Grade B for hot and contaminants standard pipe used
Leakage detection and
cold distribution and location straight forwad • Potential high PH
heating pipes Resist external problems when

 Grade C for mechanical damage conveying soft waters
•Cathodic pro
underground service better than other pipe

pipes and rising main. Easy bent by hydraulic

bending machine