Status: Alert Withdrawn.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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Such features only influence the class location length in those locations that would have a Class 1 or 2 location designation based upon all other considerations. A change in direction typically requires a change in welding parameters and welder technique; therefore, welding parameters employed for a vertical up weld will often not be successful in the vertical down direction, and vice versa.
This clause is intended to provide a simple requirement for use in the assessment of any pipe damage that may have occurred after shipment from the pipe mill, rather than to override the pipe manufacturing tolerances.
Z662.1-03 Commentary on CSA Standard Z662
As an alternative to repairing the defective pipe, the affected portion of pipe can be cut out as a cylinder and replaced with another pipe that meets the design requirements. Fracture length control by material properties alone becomes more difficult with increasing pipe size and stress level. It should be noted that this requirement also applies to sour service piping that is welded in accordance with the requirements of Clause 7.
As an example, a welder who has qualified by buttwelding two Centrifugal pumps were moved to the new Clause 4.
Z Commentary on CSA Standard Z
Init became additionally permissible for such modifications or exemptions to be used for pipeline systems for service fluids other than gas distribution, provided that the applicable limitations in Items a to c are met. 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, backfilling, supports and anchors, spill containment and overfill protection, secondary containment, release detection piping, cathodic protection systems, and testing.
A satisfactory root-break test will demonstrate that there is adequate root ductility, complete penetration and fusion, and absence of a defined amount of gas pockets and slag inclusions.
Documents Flashcards Grammar checker. Class 2 locations included areas where the degree of development was intermediate between Class l and Class 3 locations, fringe areas around cities and towns, and farm or industrial areas where the one-mile density index exceeded 20 or the ten-mile density index exceeded The following are commonly used practices for preventing flashback: This version of the requirement was included in CSA Z and has remained unchanged to date.
Prior to for gas pipelines and for ca pipelines, the design factor varied, depending upon the class location or zone. It is recognized that subsize Charpy V-notch test specimens that are smaller than half-size do not give meaningful test results. Start Webshop Product catalog Product presentation. CSA Z provides guidance on test methods for in-line and fire-box flame arresters. If either of the two partial-penetration weld macrosection specimens do not meet the root penetration requirements, the intent is to s662 two additional macrosection specimens taken from a location adjacent to the original specimens.
The requirements of this clause are already addressed in Clauses 4. It is also noted that the specified grade limitations in Column 1 of Table 7.
Heating is meant to include such treatments as heating for hot bending in the field and preheating or postheating in the joining operation, but to exclude the heating that is associated with the joining operation itself.
It should be noted that the limitations imposed by the essential changes given in Table 7.
Standards Council of Canada
The note was added in in order to provide a recommended size 3 mm maximum for the amount of concavity or convexity, without making it a mandatory requirement. Accordingly, for CSA Z 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. The cover and clearance requirements for various design situations for buried pipelines are contained in this table.
The exception allowed by Table 5. This provides a way of computing the pipe threshold stress value that is appropriate for such pipe.
Item d relates to the inherent difficulty of welding cast iron materials and the risk of cracking associated with ccsa. This definition differs substantively from the previous definition which was in Clause 3 in former editions of the Standardwhereby the presence of components in a continuous portion of the pipeline system now results in the creation of two or more pipe runs.
The longitudinal joint factor of 0. The need to have a reliable means of ensuring the closure z62 has been depressurized before opening is of the utmost importance to avoid personal injury when opening these closures.
CAN/CSA-Z | Standards Council of Canada – Conseil canadien des normes
Ina reference to natural gas refuelling stations was added to the list of items. The requirement for the designer to consider designating areas as Class 3 locations if they contain institutions where rapid evacuation may be difficult, such as hospitals or nursing homes, was introduced in ; however, such a designation should not be considered if the class location assessment area would otherwise be a Class 4 location.
In addition to the foregoing, for any welds where proven notch toughness properties are specified by the company, requalification is required if the thickness is decreased to a value less than The notch toughness properties are required to be proven at or below the applicable design temperature, in order to ensure that the required notch toughness properties will be available z626 pressure testing and in service.
As such, the class location length that is influenced by such buildings is independent of their separation distance from other such buildings. Different welder skills and welding practices are required for different weld positions and joint configurations; therefore, the specific weld position and joint configuration used for the welder qualification test joint s will dictate what weld position s and configuration s the welder is qualified to weld.
In both situations, the component nominal wall thickness at the bevel i. Bipolar installations do not affect the operation of pipelines, unless the power line is not functioning properly.
The list also reflects the editions available during the development and production of CSA Z; more recent editions may have been published since its publication date in June For oxy-fuel welds, the heat input is critical for a particular thickness and may not be achievable for any greater thickness; accordingly, requalification is required if the thickness is a increased to a value exceeding 1.
Note 5 mandates that a the unit strength product of the design thickness and the specified minimum yield strength of the lower yield strength item be not less than the unit strength of the higher yield strength item; b the design thickness of the lower yield strength item be not more than 1.
InNote 7 was clarified to address only the nominal angle of rise for the external weld, which is consistent with its depiction in Figure 7. Item a acknowledges that 033 cast iron exhibits poor fracture behaviour and that ductile iron has xsa improved toughness properties.
Class 3 locations included cea subdivided for residential or commercial purposes, including areas completely occupied by commercial or residential buildings with a prevalent height of three storeys or less.