AS/NZS This joint Australian/New Zealand standard was prepared by joint Technical Committee ME, Petroleum Pipelines. AS/NZS () Revisions AS () has recently been revised and released as AS/NZS () with a number of. AS — Australian Standard. ®. Pipelines—Gas and liquid petroleum. Part 2: Welding. A. S. —. This is a free 10 page.
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Source to ad distance. Quality of supply Part 2 of the regulations specify the standards for natural gas and LP Gas. To maintain their currency, all Standards are periodically reviewed, and new aas are published. Test report A test certificate shall be issued. The preferred technique of radiographic examination of welds in pipelines is that of using an internal orthogonal x-ray radiographic crawler as, inter alia, the detectability of imperfections including cracks is superior to that obtained using high-energy gamma rays or double-wall exposure techniques.
Where the weld complies with this Standard and the results have been recorded see Clause 8.
AS – Key Concepts and Application – Australian Pipelines and Gas Association
It may be necessary to install stopples or spheres on each side of the 288.2 site. The following should be taken into account 288.2 manual arc welding electrodes: See Clauses 24 and 25 for information dealing with arc burns. Refer to Clause 5. It is likely that in most cases, because actual operating conditions will be known and therefore assumptions do not need to be as conservative as in the generalized case used in Tier 2, the criteria of Tier 3 may, subject to satisfactory levels of fracture toughness, permit the acceptance of more severe discontinuities than both Tiers 1 and 2.
Where the material wall thickness is less than the standard thickness of the AS Any length of internal concavity is acceptable, provided the density of the radiographic image of the internal concavity does not exceed that az the thinnest adjacent base metal.
Care shall be taken to prevent ignition due to electrical sparking see Clause Line-up clamps require specific settings and maintenance. The weld joint design shall be in accordance with the AS The weld preparation is in accordance with Figure Standards Australia 2 3 4 5 6 www.
LR or LS shall be unacceptable when any of xs following conditions exist: Where the criteria for acceptance of girth weld discontinuities is Tier 2 see Clause Both parts of the parent metal shall be at the required temperature at the time that welding is commenced.
The aggregate length of indications in any continuous mm length of weld exceeds 25 mm. Electrical and gas general enquiries Tel: This means that a twotier system in which ECA was Tier 2 has 2858.2 been established. Because of the potentially hazardous nature of the earthing procedure, the earthing procedure shall be approved.
AS 2885.2 – Key Concepts and Application
The line-up clamp shall be released only after the length of root aas is equal to or greater than that specified in the qualified welding procedure specification. Where production welds are to be subject to non-destructive examination, assessment by non-destructive examination using the methods to be used for the assessment of production welds.
The hardness test shall be made on the macro test specimens. Any laminations or inclusions in the vicinity of the area to be welded. Submit a Comment Cancel reply Your email address will not be published. Building general queries Tel: The size, convexity or concavity and leg lengths shall be measured to the nearest 0. The rotational speed of the test unit shall be the same as for production testing. Non-essential variables are those Items in Table 5. The yield strength may be represented by a material grade, e.
Production welds that do not comply with the selected criteria shall be repaired see Clause 23 or 24 or cut out see Clause Welds in pipe Grade AP15L X60 or lower, welded entirely with low strength electrodes and in R1 locations, may be examined using gamma-radiography.
Experience has shown that excessive weld reinforcement height particularly at the top and bottom of welds has been a problem in the field, which has caused serious difficulties in meeting the density requirements in radiographic inspection.
This is because in normal circumstances the prerequisite conditions in Clause The work return clamp shall make good electrical contact with no evidence of arcing. Any combination of electrodes may be used to qualify a procedure. Activities undertaken within the scope of this Standard shall be directed by a pipeline licensee appointed for the purpose of giving approvals as defined in this Standard.
However in practice the demonstration of strength matching is difficult, and this Standard see Clause The audit shall be conducted on behalf of the pipeline licensee. Consumer Protection Develops, enforces and promotes legislation that protects consumers.
Welding procedures complying with and welder qualifications in accordance with the appropriate previous editions of this Standard may continue to be used for the maintenance of existing installations.
The following applies to Charpy V-notch impact tests: Non-destructive examination may be used to locate areas substantially free from discontinuities before the test specimens required for destructive tests are taken see Clause 6.