Reg. 623, Reg. 624, Reg.
FEED WATER FOR BOILER
chapter lays down specifications for feed water and boiler
water for low and medium pressure boilers (boilers operating
up to 60 kg/cm2).
boilers operating at pressures higher than 60 kg/cm2,
better quality of water to IS:10496-1983 may be adopted.
water shall comply with the requirements given in Table
1 when tested by the methods prescribed in col. 6 and
7 of the table.
Sampling shall be done following general directions given in
2 of IS:3025-1964*. In particular, the following points shall
be observed :
||It is necessary that a stainless
steel or monel metal coil is fitted on the sampling cock
so that the temperature of the water sample will be well
below the boiling point at atmospheric pressure and there
is no risk of aeration and concentration due to flashing
into steam; and
||Samples of feed water shall
be collected from the delivery of the boiler feed pump,
samples of boiler water from the top drum, and samples
of condensate from the delivery of the condensate extraction