Page 44 - kursus eBook

DRAFT GUIDELINE ON DOMESTIC GAS PIPING SYSTEM

NATURAL GAS SUPPLY SYSTEM
NATURAL GAS SUPPLY SYSTEM
Internal Piping
M Equipment
Appliances
> 20 psig INDUSTRIAL
Service Station
Internal Piping Equipment
M Appliances
20 psig
T T
r r Service Station
a a
n n Odorizer
s s City Gate
m Feeder Line RESIDENTIAL
m
i i DS Distribution Line Internal Piping M
s s 260 60 psig 300 Meter
mmH 2 0
s s psig District Area Station
I I Station
o
o M
n
n
Internal Piping
M
3000
L mmH 2 0 COMMERCIAL
L
I I Regulating Station M
n
n Multiple Endusers
e e
M Internal Piping Single
M M
3000 mmH 2 0 Development
Service Station

The main transmission pipeline is designed for 1000 psig maximum operating pressure.
However, the normal operating pressure of the line is about 450 psig. The pressure from
the main line is reduced at the city gate station to about 260-300 psig and subsequently at
district stations to 60 psig. The pressure is further reduced at area stations in residential
complexes to about 11 inches water column or at service stations in commercial complexes
to 5 psig before the pipe enters the building for further reticulation to gas appliances.

LEGAL REQUIREMENTS

The safety and reliability of gas piping or reticulation systems in non-industrial premises are
governed by the Gas Supply Act 1993 (Act 501) and the Gas Supply Regulations 1997,
under the purview of the Energy Commission (ST).

Act 501 regulates the piping of natural gas downstream of city gate stations or the piping of
liquefied petroleum gas (LPG) from the filling point of storage vessels or cylinders up to end-
user appliances or equipment.

The design, installation, operation and maintenance of piped gas systems must comply with
the safety requirements stipulated in the Gas Supply Regulations 1997 as
indicated below.

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