AS 2885 updates

Happy New Year!  I’m hoping that I’ll be able to post more regularly than over the past couple of months, but there are no promises.

Many of you will be aware that there are extensive revisions to the AS 2885 suite of standards in progress.  A couple of the Parts of the standard will have sweeping changes, others will have only minor revisions in the interests of ensuring that all the Parts are harmonised.  Harmonising the various Parts has been a key objective in these revisions since the previous independent revision cycles have given rise to some inconsistencies across the different documents.

Part 0, General.  Expect a public comment draft to be released in the next couple of months.  The main change is to the meaning of Approved and Approval but there are some minor editorial changes too.  Although it is being released for comment it is hoped that publication will follow promptly afterwards.

Part 1, Design and Construction.  This too should be released as a public comment draft in the next couple of months.  It was originally planned to be an amendment rather than a full revision but the changes were a little too extensive so public comment is required.  Again, we hope for prompt publication after the comment period.  The changes cover:

  • Addition of an informative appendix on design of CO2 pipelines (partly as a result of encouragement from the Commonwealth)
  • Changes to harmonise it with Part 0 (eg. approval requirements)
  • Addition of requirements for the design of hydrostatic test sections (belongs in Part 1 rather than Part 5 because the test design should be the responsibility of the designers rather than the test engineer)
  • Other minor changes to address editorial corrections and topics that have drawn requests for clarification

Part 3, Operation and Maintenance.  Almost a complete re-write of this part, due for publication in the next couple of months after extensive public comment and review over the past year or so.  The changes are so extensive that there is a series of seminars around the country to explain and launch the new revision, and those of you in Brisbane or Melbourne might have already attended one.  More seminars will be held in Adelaide, Sydney, Perth and New Plymouth between March and May.  (Check the APIA web site for details.)  The new revision introduces the concept of Pipeline Management System which expands on and supersedes the old Safety and Operating Plan.  My take on this is that it continues the trend away from purely technical standards (although there has been no reduction in technical content) and towards an emphasis on management systems.  The safety management study from Part 1 is another example of this.

Part 5, Field Pressure Testing.  Another almost complete re-write which has also been through the public comment and review process and is due for publication in the next couple of months.  There is now greater recognition of the need to manage strain during testing and the standard defines three types of test depending on whether any yielding is expected.  It also clarifies responsibilities for test design and execution, with the design component moved to Part 1 as noted above.

The actual timetable for release of the new documents depends on the processes of Standards Australia so it is hard to be precise about release dates.  If you subscribe to the StandardsWatch service from SAI Global (Google it) you should be alerted to new releases, but this service now requires a paid subscription.

(Phil Venton has been helpful in providing the status and schedule information here, but responsibility for the contents and commentary is mine.)

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2 Responses to AS 2885 updates

  1. Chris Hughes says:

    Happy New Year Peter! And to all my pipeline friends.

    I think it is worth emphasising the changes to Part 5 and its interaction with Part 1. Basically the committee decided that since a pipeline with a 0.8 design factor has to be tested to a minimum stress level of 100% SMYS, any elevation changes will cause the lower sections to be stressed above 100% SMYS with the possibility/probability of plastic strain occurring in these sections. The responsibility for ensuring that any plastic strain was kept within safe limits was thought to be better handled by the pipeline designer rather than the test supervisor who may not have had the training to fully understand all the requirements.

    The sad part is that it was felt necessary to move this requirement from Part 5 to Part 1 because (to quote a committee member) “Most designers never read Part 5”. Well, now they will have to! Designing the pipeline to be able to withstand the stresses of hydrostatic testing has been a Part 1 requirement for years, so how a design engineer can consider he’s done his job properly without considering the hydrotest is beyond me.

  2. Pingback: AS 2885 drafts | Pipelines OZ

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