Status: Alert Withdrawn.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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Note 4 in Clause 4. In such circumstances, the Charpy notch toughness test specimens would be smaller than half-size.
Pipeline Dwelling unit Critical dwelling unit for Class 2 location — left end Critical dwelling unit for Class 2 location — right end Feature described in Clause 4. To lower the stresses for this Class 1 location situation, the design factor for the header pipe was set at 0.
Experience has shown that pipeline ruptures can occur during hydrostatic csz or service because of damage that occurred during z662 installation process but was not detected and repaired.
It was determined that the failure stress in the presence of an axial flaw could be accurately predicted using the following equation: For Class 2 locations, the hydrostatic test factor of 0. It should be noted that more than one thickness may need to be z62 in order to qualify the entire thickness range specified in the welding procedure specification. Accordingly, the design equation factors see Clause 4.
Note 9 limits the amount of material that can be thinner than the design thickness of the lower yield strength item. June 65 Z This change recognizes the advances in technology that have a662 in detection equipment.
Z662.1-03 Commentary on CSA Standard Z662
For these reasons, the practice of using delta symbols in the Standard has been discontinued in the edition. Inthe explanation of the meaning of the term was deleted from the Standard in order to make the term more general. This allows the designer more choices; prior toregardless of caa size, atmospheric aboveground storage tanks were required to be designed to APIand low-pressure kPa maximum aboveground storage tanks were required to be designed to API A branch connection, being a combination groove and fillet weld, would also constitute an essential change from a fillet weld or a butt weld.
Inthis clause was revised to recognize that the heat input for oxy-fuel welding is critical for a particular material thickness and may not be achievable for any greater material thickness.
For any piping welds, other than partial-penetration butt welds, that are in accordance with any of the limitations stated in Items d i to d vthe company has the option of electing to use the requirements of a Clause 7; or b the ASME Boiler and Pressure Vessel Code, Section IX, for the establishment and qualification of welding procedure specifications and welders; ASME B Metallic gaskets are not permitted for use with PN 20 flanges.
In addition, it permits inspection for any damage that might be caused by the cleaning or coating equipment, which is required by Clause 6. Application of the requirements given in Table 5. In Item bthe grade of the base material is to be specified in order to establish the basis for the tensile strength requirements in Clause 7. For the branch pipe: Note 4 clarifies that it is permissible for Category II or Category III pipe to be substituted for Category I pipe csw recognition of the superiority of pipe with proven notch toughness properties.
This z662 is intended to accommodate short runs of aboveground pipe in compressor stations, for which it was considered that there had been a history of satisfactory performance with Category III pipe, and that long propagating fractures could not occur because the pipe run length is restricted to m maximum.
Figure 8 illustrates the effect of such features on a section of pipeline that would be in a Class 1 location based upon dwelling unit density. This process would be repeated after each weld pass. Pure carbon dioxide is non-toxic and non-flammable; however, it has some specific characteristics that necessitated the addition of requirements specific to carbon dioxide pipeline systems.
The following are commonly used practices for preventing flashback: It should be noted that if the specified range for any of these variables is wider x662 the range permitted by the essential changes given in Table 7.
Comments concerning specific clauses are sometimes presented under the heading of the broader clause number, rather than under the heading of the applicable subordinate clause number.
CSA Z662-03 and Z662.1-03
As such, the pipe could be marked with the API monogram. Comment on draft standards Influence national and international standards development by commenting on draft standards online. CSA Z and Z Buried oilfield water pipelines are additionally required to be covered to a depth sufficient to protect them from freezing. The nature of the development along the cea, as well as economic considerations, should influence the locations where such devices will be installed, xsa that there is the possibility of a fire occurring at each arrest csz.
For manual or semi-automatic welds produced by shielded metal arc welding, requalification is required cssa the filler metal size is changed to a size that is more than one nominal diameter size smaller or larger than the size that was used to qualify the welding procedure specification.
The forms were not carried over into the first edition of the Standard because they were considered, in some cases, to be incomplete and somewhat misleading.
A change from horizontal welding to vertical welding is an essential cxa however, a change from vertical welding to horizontal welding is not an essential change. The analyses resulted in the adoption of two toughness levels 18 J minimum and 27 J minimum. Inthe following changes were introduced in respect to some aspects that concern the determination of class location designations: Such limitations, if any, are stated elsewhere in the Standard.
CAN/CSA-Z | Standards Council of Canada – Conseil canadien des normes
Similarly, a change in the filler metal size diameter is an essential change, as specified in Table 7. The use of a gap is helpful in reducing residual stresses from welding, and thereby lowers the risk of cracking at the toe of the fillet weld.
Item a was added in to emphasize that the failure of any single component must not cause both the pressure control and overpressure protection systems to become inoperative. Although never specifically stated, the various vapour pressure limits through the years have been based upon values determined using the Reid method, in accordance with the service requirements of ASTM D Accordingly, this Commentary does not provide formal interpretations of the Standard.