AS 2885.2 PDF
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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Shallow crater cracks or star cracks are located at the stopping point of weld beads and are the result of weld metal contractions during solidification.
Partial lengths from a sufficient number of welds to ensure that the equivalent length to Item a above is examined. The supervisor shall be qualified in accordance with Clause To safeguard the public and consumers in such a changing environment, these new regulations sa been introduced to ensure: For example, repairing corrosion defects by surfacing with deposited weld metal whilst the pipeline is in service.
Rectangular or square pads may be used, provided the corners of the pad are rounded. This page is for: Criteria shall be as follows: Areas subject to flooding, possible severe land movement see AS The welds may be produced by position or roll welding or by a combination of position and roll welding.
The means of maintaining aa site to mainline valve communication.
Such assemblies are usually prefabricated off-site. If this additional test specimen fails, the welding procedure shall be deemed not to comply with this Standard. Ax following applies to Charpy Ad impact tests: This is because in normal circumstances the prerequisite conditions in Clause Where a welder holds a Category 2 partial qualification and is required to qualify for a Category 1 multiple qualificationthe successful making of the appropriate additional test welds.
Criteria of acceptance The test specimen shall be deemed to be acceptable if the polished surface of the weld and the heat-affected zone shows the following: The following should be taken into account for manual arc welding electrodes: Charpy tests are mandatory when the criteria for acceptance of girth weld discontinuities is Tier 2 see Clause At times there may be a need for control of the operating pressure and flow rates in order to provide suitable conditions for welding.
The wall thickness 2885.22 take into account the limits in the essential variables and, where there is a choice, it should preferably be at the upper end of the range qualified. It is 285.2 that the time lapse from start of root pass to start of hot pass be the defined method to avoid uncertainties associated with root 2885.2. These reference radiographs shall be used in order to assess the depth of gas pores in production radiographs. Alternatively, undercut may be assessed 28852. depth by comparing production radiographs with reference radiographs prepared from weldments of the same thickness and welding procedure, and where the depth of real examples of undercut has been measured by macro examination.
AS – Key Concepts and Application – Australian Pipelines and Gas Association
Discontinuities shall be evaluated in accordance with Clause Refer to Figure 4. Reports A test certificate shall be issued. Production welds that do not comply with the selected criteria shall be repaired see Clause 23 or 24 or cut out see Clause Where the wall 2858.2 is between 3.
Such changes shall be documented aas a revised welding procedure specification. Root slag intrusions shall be classified as undercut for the purposes of sentencing to this Standard.
Consumer Protection Develops, enforces and promotes legislation that protects consumers. A suitable form of documentation is given in 2885.2 F. Line-up clamps require specific settings and maintenance.
AS Gas pipe Welding_百度文库
These properties should be determined from appropriate tests performed on the procedure qualification test weld. You must comply with this standard if you intend to weld pipelines that carry gas aas liquid petroleum. It is recommended that gas tungsten arc welding or gas welding be used for butt welds on pipe of outside diameter For this reason it is important that an assessment be made of the capability of the welder to produce welds within the required reinforcement limits.
Non-essential variables are those Items in Table 5.