CEA 4001 - Flushing Connections; Pressure Gauges

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92

c)

any

water

flow

alarm

switch

installed

downstream

of

the

main

control

valve

set.

The

test

valve shall

be

connected

downstream

of

the

water

flow

alarm;

d)

any

automatic

pump

starting

device;

e)

any

pump

or

pressure

tank

house

sprinkler

alarm

flow

switch

installed

upstream

of

the

control valve

set.

13.5.2 Remote test valves

A

test

facility

shall

be

provided,

incorporating

a

test

valve

with

any

associated

fittings

and

pipework, delivering

a

flow

equivalent

to

the

discharge

from

a

single

sprinkler,

connected

at

the

hydraulically

most remote

location

on

a

distribution

pipe.

13.6 Flushing connections

Flushing

connections,

with

or

without

permanently

installed

valves,

shall

be

fitted

on

the

spur

ends

of

the

installation

distribution

pipes.

They

shall

-

be

at

least

DN50

and

-

in

case

of

distribution

pipes

bigger

than

DN50

be

connected

eccentrically

at

the

bottom

of

the distribution

pipe

and

-

be

at

least

200mm

long

Flushing

connections

shall

be

fitted

with

a

suitable

plug

or

cap.

NOTE

1:

it

may

be

desirable

in

certain

cases

to

fit

flushing

connections

on

ranges,

e.g.

in

the

form

of

a blank

tee.

NOTE

2:

in

addition

to

their

use

for

flushing

of

the

pipework,

flushing

connections

may

be

used

to

check that

water

is

available

and

for

carrying

out

pressure

and

flow

tests.

NOTE

3:

pipework

which

is

completely

full

of

water

may

be

damaged

by

the

increase

in

pressure

due

to temperature

rises.

If

complete

venting

of

air

in

an

installation

is

likely

to

occur,

e.g.

in

the

case

of

a

gridded

layout

with

flushing

connections

at

the

extremities,

consideration

should

be

given

to

the fitting

of

pressure

relief

valves

or

expansion

vessels.

13.7 Pressure gauges

Pressure

gauge

scale

divisions

shall

not

exceed:

a)

0,2

bar

for

a

maximum

scale

value

less

than

or

equal

to

10

bar;

b)

0,5

bar

for

a

maximum

scale

value

greater

than

10

bar.

NOTE:

the

maximum

scale

value

should

be

of

the

order

of

150%

of

the

known

maximum

pressure

to

be applied.

13.7.1 Water supply connections

Each

town

main

connection

shall

be

fitted

with

a

pressure

gauge

between

the

supply

pipe

stop

valve

and

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