Status: Alert Withdrawn.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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Inthis definition was revised, with the deletion of the 1. If either of the two partial-penetration weld macrosection specimens do not meet the root penetration requirements, the intent is to have two additional macrosection specimens taken from a location adjacent to the original specimens.
Flashbacks are 033 by the use of flame arresters or positive purge systems, or a combination thereof. All reference to class location was removed from the version of Table 4. This formula was developed for buried pipelines mm OD or smaller, operating at pressures not exceeding 8 MPa, and conveying gases that exhibit single-phase decompression.
It is not a mandatory requirement that a representative butt weld test joint be made and tension tested in addition to the fillet or branch weld test joint; however, it is understood that there must be reasonable proof that the welding procedure will result in a weldment with a tensile strength at least as high as the base materials.
Overpressure protection can be cza by pressure-limiting systems or pressure-relieving systems. The requirements of this clause are already addressed in Clauses 4. Class 1 location Class 2 location m 033 Class 2 location Class 1 location m min Legend: This partial-penetration test joint shall be examined and tested in accordance with the requirements of Clause 7.
Operating, Maintenance, and Cda The macrosection test has the following disadvantages in relation to the root-break test: X, Annex X, and Table X. Circumferential Cracks in Pressure Vessels and Piping. A satisfactory z6662 test will demonstrate, for the specific plane examined, that there is complete 033 and fusion, absence of cracks, absence of a defined amount of gas pockets and cda inclusions, and absence of excessive concavity or convexity. Although it is a good practice to document the carbon equivalent for all base materials used in the procedure qualification, Item d and Table 7.
If water is present in combination with the defined fluids, a corrosion reaction involving the generation of atomic hydrogen on the inside surface of the piping may occur, with a consequent possibility of such hydrogen entering the material and subsequently causing cracking to occur. Inthe designer became permitted to use pipe made to any of the cxa standards and specifications listed in Table 5.
For such fluids, the conventional requirements previously in place continue to be appropriate. Accordingly, the positions for which a welder becomes qualified are dependent upon a the branch pipe to run pipe ratio i.
CSA Z662-03 and Z662.1-03
In order to preclude operating pressures established by pressure testing that are higher than the design pressures, CSA ZM introduced 0.
The form was not carried over into the first edition of z626 Standard because it was considered in some instances to be incomplete and somewhat misleading.
A case in point z662 the requirement to use piping that has proven notch toughness properties; the requirements in the Standard have been modified and generally made more stringent through the years, primarily to provide improved safety, but also to reflect technological improvements that have been made in the manufacturing processes used for pipe and components.
The cover requirements for carbon dioxide pipelines were added in and are identical to those z626 for HVP pipelines. As shown caa Figure 4. For gas transmission pipelines, the valve spacing requirements were approximately 20 miles within areas conforming to Class Location 1, a maximum of 15 miles within areas cda to Class Location 2, a maximum of 8 miles within areas conforming to Class Location 3, and a maximum of 5 miles within areas conforming to Class Location 4.
Inthe wording in this clause in the Standard was revised to include reference to S-numbers, consistent with the ferrous material classification system used in ASME Section IX.
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.
CAN/CSA-Z | Standards Council of Canada – Conseil canadien des normes
Accordingly, some companies derive such ranges by using combinations of the extreme values observed individually for each of the three welding parameters, and thereby obtain a range of heat input values that is larger than the range that would be derived using typical instantaneous values for those welding parameters.
It is also noted that the specified grade limitations in Column 1 of Table 7. June 61 Z The specific heat treatment parameters to be used are to be set by the company.
It is common practice, but not mandatory, for the root face tolerances to be specified.
Z662.1-03 Commentary on CSA Standard Z662
Inthis test was added to the Standard in order to provide an alternative method of assessing fillet weld quality. As listed in Table 7. Welders doing tack welding need to be qualified, and preheating is required for tack welding if preheating cea required for production welding.
As such, the pipe could be marked with the API monogram.
The 27 J minimum requirement applies to fittings having a grade of Grade or higher, flanges NPS 24 or larger, and pressure-containing valve parts having a grade of Grade or higher. Where approved by the company, it is permissible to qualify a welding procedure specification to be used only for repair welding of production welds by making weld repairs to a full-circumference weld and cutting the required test specimens from these repaired locations.
Changes to welding variables that are not listed in Table 7.
Similarly, a xsa in the filler metal size diameter is an essential change, as specified in Table 7. In Item dthe size of the root gap is to be specified.
Prior to for gas pipelines and for oil pipelines, the design factor varied, depending upon the class location or zone. Although such in-between areas are less than 1. As the number of people near the pipeline increases, the probability of personal injury sca property damage increases.
Prior tothe prescribed distance limitation from roads and railways was 25 feet. In recognition that there are several suitable materials available, CSA materials are no longer required to be used if available; however, pipe made to a line pipe standard or specification rather than an ordinary pipe standard is generally preferred for Category II and Category III applications.