POLYETHYLENE (PE) PIPING SYSTEMS FOR
GASEOUS FUELS SUPPLY - PART 4: VALVES
This Malaysian Standard specifies the characteristics of valves made form polyethylene (PE)
for piping systems in the field of the supply of gaseous fuels.
NOTE. Valves made form other material than polyethylene designed for the supply of gaseous fuels conforming to
the relevant standards are permitted to be used in PE piping system according to MS 1086 provided they have
relevant PE connection for butt fusion or electrofusion ends (see MS 1086: Part 3).
It also specifies the test parameters for the test methods referred to in this standard.
In conjunction with the other parts of MS 1086 (see Foreword), it is applicable to PE valves,
their joints and to joints with components of PE and other materials intended to be used under
the following conditions:
a) a maximum operating pressure, MOP, up to and including 4 bar1) (PE 80) and 5 bar
(PE 100);
b) an operating temperature of 20 °C as reference temperature; and
c) an operating temperature between -20 °C and +40 °C.
MS 1086 covers a range of maximum operating pressures and gives requirements
concerning colours and additives.
NOTES:
1. For other operating temperatures, derating coefficients should be used, see MS 1086: Part 5.
2. It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects. taking
into account their particular requirements and any relevant national regulations and installation practices or codes.
It is applicable to bi-directional valves with spigot end or electrofusion socket intended to be
fused with PE pipes conforming MS 1086: Part 3 without any fittings or with PE fittings
conforming to MS 1086: Part 2.
This part of MS 1086 covers valves with a nominal size DN/OD < 225.
