Status: Alert Withdrawn.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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Documents Flashcards Grammar checker. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. Reference Publications 4 3. Pressure Testing 98 8. Corrosion Control 9. Operating, Maintenance, and Upgrading caa Offshore Steel Pipelines Gas Distribution Systems Plastic Pipelines Oilfield Steam Distribution Pipelines Aluminum Piping z62 Accordingly, this Commentary does not provide formal interpretations of the Standard, and z6662 should be viewed as an informal annotation of portions of the Standard, as compiled by several individuals who were involved in its development.
The purpose of the Commentary is to provide background information concerning certain clauses and requirements in the Standard, to provide information that may be of assistance to the reader in the understanding and implementation of such requirements, and to refer to research materials that were used during the formulation of some of the requirements in the Standard.
Z Commentary on CSA Standard Z
The clause headings and numbers used in this Commentary correspond to those in the Standard; however, it should be noted that comments have not been provided for all the clauses of the Standard. This second edition was developed by B. Wilson and is a compilation of revisions to the previous Commentary, including additional comments pertaining to all substantive changes that have been made to the edition of CSA Z Z66 Preface in the edition of the Standard highlights the most significant changes to the Standard, relative to the previous cda.
All commentaries are the opinions of csx respective authors and are not necessarily the opinions of CSA or its Technical Committee. It is expected that revisions to this Commentary will be made from time to time in order to incorporate information associated with 003 editions of the Standard. The requirements have been developed over time, based upon industry experience and knowledge of the scientific principles involved.
The first edition of the Standard was published inand it was developed by the amalgamation of the requirements that were z66 contained in three CSA Standards: The first editions of the CSA oil and gas pipeline standards were based extensively on the US codes and, appropriately, many of their requirements were adopted by the Canadian publications without modification.
The edition was reapproved in and again in Clause 15 of Z was developed to incorporate and update the requirements for the design, construction, operation, and maintenance of aluminum piping that were contained in CSA ZM and to reference CSA Z Comments concerning specific clauses are sometimes presented under the heading of the broader clause number, rather than under the heading of the applicable subordinate vsa number.
Comments caa figures and tables are sometimes presented under the heading of one of the clauses that refer to the figure or table, rather than under the heading of the applicable figure or table. June 1 Z X, Annex X, and Table X.
The symbol was aligned with the applicable clause, figure, or table number, and it x662 intended to indicate the general location of the change, rather than the precise location.
These symbols were intended for convenience only and were not intended to replace a thorough review of the contents by cs reader. Users of the Standard were cautioned not to rely unduly on the presence of these symbols to indicate the substantive changes because the symbols were included on the basis of subjective ad hoc decisions.
The requirements of the Standard speak for themselves. In addition, one of the reasons for csx publication of the original Z For these reasons, the practice of using delta symbols in the Standard has been discontinued in the edition. Accordingly, this Commentary does not provide formal interpretations of the Standard.
For formal interpretations of the Standard, see Note 5 in the preface of the Standard. Carbon dioxide was added as a new service fluid in The definition of gas was changed in to accommodate the coverage of gaseous service fluids other than fuel gas and sour gas; however, untilnone had been added. The carbon dioxide pipelines that are covered are those onshore pipelines that are for use in enhanced oil recovery operations, involving the transportation of high-purity carbon dioxide from a suitable source to the injection site at an oil well.
These pipelines were added to the Standard because it was considered that there had been sufficient experience with such an application to warrant their inclusion. 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. It should be noted that vsa definition of a carbon dioxide pipeline permits the service fluid in such a pipeline to be other than pure carbon dioxide, so additional special requirements may be appropriate.
It should be noted that carbon dioxide might additionally be present in conventional pipelines as a component of a multiphase fluid or as a component of a fluid in a gas gathering system.
For such fluids, the conventional requirements previously in place continue to be appropriate. The figures are schematic and are intended to convey broad functions rather than specific details. Items that are within the defined limits of pipeline systems but are currently outside dsa scope of the Standard may be included in the scope in some future edition of the Standard, should the CSA Technical Committee on Oil and Gas Pipeline Systems and the Strategic Steering Committee on Oil and Gas Industry Systems and Materials deem that such additions to the scope are appropriate.
Inthe previous reference to the design and fabrication of pressure vessels that are covered by appropriate pressure vessels codes was deleted from the list of items in order to recognize that some items within the scope of the Standard are required to be designed in accordance with the requirements of the ASME Boiler and Pressure Vessel Code or CSA B Ina reference to abandoned piping Item f was added to the list of items in order to clarify that such piping is no longer part of the pipeline system and is therefore outside the scope of 6z62 Standard.
Ina reference to natural gas refuelling stations was added to the list of items. Ina reference to hydrocarbon storage in underground formations Item o was added to the list in order to acknowledge the publication of CSA Z, which subsequently has been superseded ca the edition referenced in Clause 2 of the Standard.
Standards Council of Canada
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.
The exercise of competent engineering judgment is intended to promote the use zz662 more stringent requirements than are specified in the Standard, not to permit deviations from the prescribed requirements.
Some practices that are practicable and reasonable during design and construction may not be practical for an existing pipeline. A case in point is 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 z66 used for pipe and components.
Design requirements can be readily changed; however, the mechanical properties of inservice piping cannot. It is recognized that where upgrading involves the replacement of existing piping with new piping, what was not practical for the old piping is practicable for the new piping.
The similarity of the terms may lead to confusion for the reader unless the specific meanings are understood. June 3 Z Accordingly, even new practices that are superior to established practices are not included in the Standard until the Technical Committee deems such css practices to be acceptable.
It is not the intent of the Standard to prevent the development of new practices, and generally such practices would need csx be approved for use by the regulatory authority having jurisdiction. This clause also clarifies that notes associated with written clauses are not considered cs however, notes associated with tables cda figures are a mandatory part of the Standard.
This was intended to clarify that a facility does not become cza pump station or a compressor station merely because a pump or compressor is present in the facility. Normally, the editions listed are the editions that were current at the time that the Standard csaa being edited prior to publication. It is very important that the context of the reference being made is known because it is usually the case that only limited parts of the referenced publications are intended to apply.
The list includes zz662 number of withdrawn standards and other published industry documents, as well as superseded editions that are cited in describing the development of requirements and standards. 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 Determining the Remaining Strength of Corroded Pipelines: Supplement to B31 — Pressure Piping B Circumferential Cracks in Pressure Vessels and Piping.
Pipeline Research Council International.
Guidelines for Weld Deposition Repair on Pipelines. Welding Journal, June The definitions in Clause 3 are general definitions for terms that have the same meanings regardless of their location in the Standard. Defined terms are not further distinguished in z66 text of the Standard; accordingly, the user of the Standard should be familiar with the defined terms and their definitions because an understanding of the meaning of the defined terms can be very helpful in making the requirements of the Standard more clearly understood.
CAN/CSA-Z | Standards Council of Canada – Conseil canadien des normes
Definitions are intended to be self-explanatory; however, the following comments are provided as additional information: Class location assessment areas are of a constant size m by 1. Inthis definition was revised, with the deletion of the 1. This term had been used in previous editions of the Standard without a definition. Inz6622 words were added to this definition to broaden the scope to include those in charge of design and materials, as well as those in charge of construction.
Engineering assessments apply to a variety of situations; however, engineering critical assessments apply only to the consideration of imperfections in fusion welds. LVP pipelines, HVP pipelines, CO2 pipelines, and gas pipelines are four distinct entities; one should not consider gas pipelines with large proportions of liquids to be HVP pipelines, even though the criteria in the HVP pipeline system definition appear to be met.
Although never specifically stated, the various vapour pressure limits through z626 years have been based upon values determined using the Reid method, in accordance with the service requirements of ASTM D Some pipe standards included in the Standard by reference permit the pipe to be ordered using NPS designations; however, pipe size designations in the Standard are consistently expressed in terms of the specified outside diameter of the pipe.
As stipulated elsewhere in the Standard, overpressure protection can be accomplished by pressure-limiting systems or pressure-relieving systems. Making the definition part of Table 5. In addition, it should be noted that the meaning of the term vsa also been revised. Prior tothe length of a pipe run was unaffected by the presence of components; now, the presence of components is one of the factors that determine the a662 of a pipe run.
Both types of piping are removed from service; however, abandoned piping is not maintained for future return to service, whereas deactivated piping is maintained for future return to service. This change is to clarify that MOP is not necessarily established on the basis of pressure testing, and the change in definition is consistent with the revisions made to Clause 8.
June 15 Z Inthis definition was revised to include tunnelling. The working or allowable stress design method is the one conventionally used; however, Clause 4. Clause 4 deals primarily with steel piping designs for onshore pipelines and covers fsa requirements for piping made of materials other than steel, offshore steel pipelines, and oilfield steam distribution pipeline systems by reference to the appropriate clauses elsewhere in the Standard. This is an integral part of the design process, and the clause itemizes a number of factors that must be considered in this selection process.
The clause notes direct the designer to useful reference materials, including a new Annex L, to aid in this selection process.
The maximum operating pressure is ultimately established by pressure testing in accordance with the requirements of Clause 8, which additionally requires that such established maximum operating pressure not exceed the design pressure.
CSA Z662-03 and Z662.1-03
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. The note is advisory to alert the designer that high purity carbon dioxide may reach extremely low temperatures during pressure-relieving or pressure-reducing situations.
The added note references additional coating considerations in Clause 9.