Status: Alert Withdrawn. Norwegian title: Oil and Gas Pipeline Systems and Commentary on CSA Standard Z, Oil and Gas Pipeline Systems. English title. CSA Special Publication Z Commentary on CSA Standard Z, Oil and Gas Pipeline Systems Published in June by Canadian Standards. Hyperlinks from the Z Standard to the corresponding clauses in the Z and. Special Publication. Z Commentary on CSA Standard.
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June 1 Z Inthe explanation of the meaning of the term was deleted from the Standard in order to make the term more general. Prior tothe limit on ovality in CSA Z was 2. Also, it is recognized that more skill is required fsa the size of the branch pipe approaches the size of the run pipe. Accordingly, at that time, welders who qualified by making butt welds were considered qualified to make fillet welds on pipe in the same outside diameter group and wall thickness group for which they were qualified for butt z62.
What kind of news would you like? June 59 Z An analysis of the aerial photographs of the major gas pipelines in the United States resulted in the establishment of four location classes and two population density indices.
This was intended to clarify that a facility does not become a pump station or a compressor station merely because a pump or compressor is present in the facility. June 45 Z Although in some instances in the Standard the requirements are necessarily quite prescriptive, it is important to keep in mind that the Standard is not a design handbook and that the exercise of competent engineering judgment is necessary in using the Standard.
Such specified temperatures are subsequently used in stress analysis calculations, the specification of mechanical properties of some piping materials, and the determination of design pressures.
As stipulated elsewhere in the Standard, overpressure protection can be accomplished by pressure-limiting systems or pressure-relieving systems. Inthere were a number of changes introduced in this clause, including the addition of notes and z66 figure to clarify the requirements. The use of this provision is at the option of the company, in recognition that production welding may not involve both positions, and the company may therefore prefer to use single-position qualification ca the welders.
CAN/CSA-Z | Standards Council of Canada – Conseil canadien des normes
Accompanying this text revision, Table 4. June 49 Z The mm cza requirement takes into consideration sca ability of the contractor to control the placement of the backfill, the future compaction of the backfill, and the potential for movement of the buried pipeline in the ditch. This Standard combines fillet and branch connection welds in the same clauses e. CSA Z and Z For this method of fracture propagation control, at intervals along the pipeline route, encircling rings or wraps would be placed around the piping in order to restrict the flap opening during the fracturing process, or heavier wall thickness pipe would be used in order to reduce the hoop stress ahead of the advancing fracture front.
Studies in Australia have shown that the presence of moderate buckles is unlikely to induce any local yielding that could damage the coating or lead to failure of the pipe through bursting. Cas has been clarified that piping is not to be intentionally operated at pressures greater than its maximum operating pressure. There is no strict guidelines or consensus on the determination of interpass temperature, although typically it involves measuring the base metal temperature immediately adjacent to the weld joint within a short period of time after the weld bead has been deposited.
Note 1 c recognizes that a limited amount of material within the joint design area may be thinner than the design thickness. It was decided that it would be more reasonable to assess the population density in the general vicinity of a pipeline by counting the number of buildings intended for human occupancy in successive discrete non-sliding areas each one-half mile wide by one mile long, with the pipeline at the z6622 location placed end to end along the full length of the pipeline.
The organization establishing the welding procedure specification chooses the values to specify as limits for the various welding parameters that are applicable; however, the qualified welding procedure specification becomes limited by the values that were used z662 the procedure qualification test or tests that qualified the procedure. At low levels of Charpy V-notch absorbed energy, the tolerable flaw length increases with increasing absorbed energy; however, this positive influence diminishes rapidly with increasing absorbed energy and becomes negligible at higher levels of absorbed energy.
Bipolar installations do not affect the operation of pipelines, unless the power line is not functioning properly.
Z Commentary on CSA Standard Z
An anomalous result can be obtained, whereby an increase in dwelling unit density in an area containing four- or more storeyed buildings intended for human occupancy does not necessarily dictate a Class 4 location designation; however, it is common 6z62 for the pipeline designer to assign a Class 4 location designation to any area that contains buildings that are intended for human occupancy and have more than three storeys, rather than trying to decide whether or not such buildings are prevalent or will be prevalent after future development 033 the area.
In post editions of CSA Z and in the and editions of the Standard, minor modifications of the requirements concerning the determination of class location designations were introduced. Inthis definition was revised, with the deletion of the 1. Similarly, a change in the filler metal size diameter is an essential change, as specified in Table 7.
Class location designations are determined on the basis of class location assessment areas m wide by 1. Items b and c are intended to ensure that Table 5.
Standards Council of Canada
Init was recognized that when welders qualify for branch connections, they perform a groove and fillet weld combination, and therefore demonstrate more skill than would be required to make a simple fillet weld in the same outside diameter group, wall thickness group, and position. You need to log in before adding standards to the monitoring service.
The prerequisites and restrictions concerning the qualification of such used materials are more extensive and are detailed in Clause 5. The half-mile width was cza because it could be readily located on typical aerial photographs that were used for locating pipelines, and the committee considered that it gave a representative sample of z62 general area being traversed by the pipeline.
Ina number of modifications to the foregoing class location definition and designation criteria were included in CSA Z, mainly based upon concepts that had been developed in for inclusion as Part of the US Federal Safety Standards for Gas Pipelines. The cover requirements for carbon dioxide pipelines were added in and are identical to those specified for HVP pipelines.
This PEI document provides a concise compilation of recommended practices and procedures related to the installation of underground storage systems, including the topics of excavating, z662, supports and anchors, spill containment and overfill protection, secondary containment, release detection piping, cathodic protection systems, and testing.