26
Gas
Q&A
Piping—
your questions
answered!
Compiled by ESV’s Gas Installations
and Appliance Safety team.
As per previous issues of Energysafe,
we are pleased to provide answers
for a varied range of frequently asked
questions received on ESV’s gas
technical helpline, 1800 652 563.
Note The technical regulator may require notification before work commences and confirmation that completed work is in accordance with
this Standard (AS 5601—2004) and any other relevant requirements.
Question
Answer
Clause
How do you connect two gas pipes together,
which are made of electrochemically
incompatible materials?
You should make the connection using a suitable insulating joint.
This will stop the two pipes touching.
AS/NZS 5601:2013,
Part 1
In a situation where you have a steel gas
pipe (coated with high density polyethylene
or covered with an appropriate wrapping)
emerging from the ground, how far out of
the ground should the coating or wrapping
extend with the pipe?
The coating or wrapping must extend at least
300mm out of the ground.
How should a pipe or fitting be protected
from damage in a corrosive environment?
The pipe or fitting can be sheathed, coated or wrapped, or cathodic
protection, sacrificial anodes or rectifier units can be installed.
These methods will protect the pipe or fitting.
AS/NZS 5601:2013,
Part 1
Where you are installing uncoated or
bare steel pipe, how should you go about
protecting the pipe against corrosion?
You must protect the uncoated or bare steel pipe as soon as possible
after installation and before commissioning by:
(a