Category Archives: Operations

Penetration resistance – existing pipelines

I’ve written before about penetration resistance and the B-factor as specified by AS 2885.1 Appendix M, but that post didn’t distinguish between design of a new pipeline and review of an existing line.  From time to time I see confusion in … Continue reading

Posted in External interference, Operations, Pipeline design, Risk assessment, Standards | 3 Comments

Road crossings and high design factor

The rules for allowable stress at road crossings are given in Clause 5.7.3(c) of AS 2885.1.  Recently I had an interesting query which illustrated a bit of a gap in these rules. Basically the combined equivalent stress should be calculated … Continue reading

Posted in Operations, Pipeline design, Standards, Uncategorized | 2 Comments

Perfectly safe …

Yesterday I went to the funeral of a friend from university days.  That’s not particularly relevant to pipeline engineering, except that he was the source of the punchline I use almost every time I talk to a group or a … Continue reading

Posted in Eng'g philosophy, Operations, Pipeline design, Risk assessment | Leave a comment

Think like the judge

One way of thinking about the validity of your actions as an engineer is to imagine how they would be perceived by the inquiry following a disaster involving your work.  A while ago I used to be a bit apologetic, … Continue reading

Posted in Eng'g philosophy, Operations, Pipeline design, Risk assessment | 8 Comments

Vent ignition follow-up

The previous post certainly generated discussion – a total of 10 useful comments (so far, and not counting my responses).  Thanks to all those who contributed.  I started replying to individual comments but it became a bit overwhelming so this … Continue reading

Posted in Incidents, Operations, Pipeline design | 10 Comments

Vent ignition

Around Australia there must be hundreds of blowdown vents on gas pipelines.  With a few minor variations the standard design is a short vertical pipe, maybe 2.5 m high, with a removable closure on top and a plug valve to … Continue reading

Posted in Incidents, Operations, Pipeline design | 16 Comments

More on the new standards

My post late yesterday was a bit brief – I just wanted to get the news out. Congratulations and thanks are due to Phil Venton (chair of Standards Australia committee ME-038) for shepherding this complex suite of documents through the … Continue reading

Posted in Operations, Pipeline design, Standards | 1 Comment