AS NZS 2885.2 pdf download

AS NZS 2885.2 pdf download.Pipelines — Gas and liquid petroleum
1.1 Scope
This Standard specifies minimum requirements for safety, welding consumables, weld preparations, welding processes, qualifications of welding procedures and personnel, and fabrication and inspection requirements for the construction and maintenance welding of carbon and carbon-manganese steel pipelines down to 3.2 mm wall thickness designed and constructed in accordance with AS/NZS 2885.1. The welding of corrosion-resistant alloy steel pipelines, or pipelines with NOMINAL THICKNESSES less than 3.2 mm, is not precluded, but is not expressly covered by this Standard. The welding of such pipelines has to be given special consideration. The following types of welds are covered by this Standard: (a MAINLINE PIPE. (b) Tie-in. [C) Special class (e.g. golden weld). [d) Repair welds (see Section 25). [e) Welds on or between COMPONENTS. [f]) Temporary welds used in construction (e.g. test headers). (g) Structural attachments. (h) Aluminothermic or brazing welds for electrical attachments. (i) In-service welds. (i) Welds made in accordance with other standards. (k) PIPELINE ASSEMBLIES. The welding may be done by a manual metal arc, submerged arc, gas tungsten arc, gas metal arc, flux cored arc or by a combination of these using a manual, semi-automatic, or AUTOMATIC WELDING technique or a combination of these techniques. The welds may be produced by position or roll welding, or by a combination of position and roll welding. This Standard is applicable to the welding of joints in or on pipelines, and the welding of PIPELINE ASSEMBLIES manufactured from pipes and COMPONENTS. NOTE 1 For examples of welding of assemblies that are covered by this Standard, see Figure 1.1. NOTE 2 The welding of COMPONENTS may present special difficulties when using typical pipeline welding procedures (see Appendix B). It is not intended that this Standard be applied to the following: (i) STATION pipework as defined in AS/NZS 2885.1. (i) Longitudinal welds or spiral welds made during the manufacture of a pipe or a COMPONENT. (ii) Underwater welding.
1.3 Terms and definitions
For the purpose of this Standard, the definitions given in AS 1929, AS 2812, AS 2832.1 and those below, apply. 1.3.1 approved and approval as defined in AS 2885.0 1.3.2 automated ultrasonic testing AUT mechanized ultrasonic inspection for pipe girth welds using a technique based on zonal discrimination whereby the weld is divided into approximately equal vertical examination sections (zones) each being assessed by a pair of ultrasonic search units 1.3.3 automatic welding welding in which all operations are preset and performed automatically during the process Note 1 to entry: The welding operator is not able to change or adjust any weld parameters or variables once the welding operation has commenced. 1.3.4 burn-off rate ratio of electrode length consumed to the length of weld pass deposited, which is proportional to the HEAT INPUT, divided by the square of the electrode core wire diameter Note 1 to entry: Weld Australia (formerly WTIA) publication TN 01 provides information relating to BURN-0OFF RATE TO HEAT INPUT. 1.3.5. buttering surface variation in which one or more layers of weld metal are deposited on the weld face of one member (e.g. a high alloy weld deposit on steel base metal that is to be welded to a dissimilar base metal) 1.3.8 component as defined in AS 2885.0 Note 1 to entry: COMPONENTS made from API 5L PSL2 pipe and that meet the mechanical properties of the pipe material in the welded condition can be treated as pipe in relation to welding procedure qualification. 1.3.9 crack tip opening displacement (CTOD] test destructive test that provides a quantitative fracture mechanics based measure of the fracture toughness of the weld metal in girth welds Note 1 to entry: See Clause 7.4.7.2, CRACK TIP OPENING DISPLACEMENT (CTOD) test. . 1.3.10 computerized radiography CR two-step radiographic imaging process; first an image plate is exposed by penetrating radiation; secondly, the luminescence from the image plate is stimulated, detected, digitized and displayed 1.3.11 defect as defined in AS 2885.0 1.3.12 design temperatures range of the metal temperatures to be expected in construction, testing and operation including consideration of depressurization and repressurization Note 1 to entry: See AS/NZS 2885.1 for details. 1.3.13 diameter outside DIAMETER nominated in the material order, ignoring the manufacturing tolerance provided in the specification under which the pipe was manufactured