(I’m back. Things still seem to be incredibly busy but I’m hoping to find enough time to resume reasonably regular posts here.)
I still haven’t finished the series of posts on location classification so it seems appropriate to resume with a brief overview of the secondary location classes. To establish the basics:
Every point on a pipeline must have a primary location class (R1, R2, T1 or T2). But there are some land uses and features that don’t fit neatly into those primary classes. So AS 2885 has provision for secondary location classes that draw attention to these special locations.
Secondary location classes are optional – they only need to apply where they are relevant. As noted previously, the main purpose of location classification is to help the safety management study identify and focus on areas of higher risk and in some cases to require increased risk reduction measures. That applies equally to primary and secondary location classes. If a secondary location class requires additional risk reduction then that overrides the requirements of the primary location class.
There are five secondary location classes (see Clause 4.3.5 of AS 2885.1-2007):
- Sensitive (S)
- Industrial (I)
- Heavy industrial (HI)
- Common infrastructure corridor (CIC)
That should all be pretty straightforward. In subsequent posts I’ll expand a bit of the first four secondary classes. There isn’t much to say about the W class because it doesn’t impose any particular requirements, other than the obvious need to ensure that the design is appropriate for the submerged (or equivalent) installation conditions.