BS 2486:1997 gives recommendations for the control of water-side conditions of steam boilers and water heaters and also for the preparation of feed water for such plant. The following categories of water heating or steam-raising plant are covered:
a) hot water systems
b) electrode boilers
c) shell (fire-tube) boilers operating at pressures up to 30 bar
d) water-tube boilers operating up to critical pressure
e) once-through boilers, including ‘coil’ and ‘hairpin’ types, operating up to, or above, the critical pressure.
The recommendations are not applicable to:
a) the treatment of water for most domestic heaters, which is covered by BS 7593
b) the treatment of water for marine boilers, which is covered by BS 1170
c) the treatment of water for nuclear-powered steam-generation plant.
The use of electronic, electrostatic or magnetic products is not covered in this standard.
Methods for the analysis of water are not described in this standard.