CSA Z662 03 PDF

Status: Alert Withdrawn.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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This version of the requirement was included in CSA Z and has remained unchanged to date. Low-voltage less than 35 kV alternating current lines pose different concerns than high-voltage alternating current lines. The rationale for the limitation that pipe made to ASTM A 53, Aand A not be used for Category III applications is that special ordering and testing requirements would be needed in order to meet the requirements of Clause 5.

The specific note identified by an asterisk in Table 4. The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email.

Z66 edition was reapproved in and again in Bipolar installations do not affect the operation of pipelines, unless the power line is not functioning properly. Init became additionally permissible for such modifications or exemptions to be used for pipeline systems for service fluids other than gas distribution, vsa that the applicable limitations in Items a to c are met. Category III pipe requires s662 pipe body notch toughness properties in the form of energy absorption only; the details of such requirements are contained in CSA Z A case in point is the requirement to cda 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 vsa and components.

An upset condition could occur in which a bipolar power line installation operates as unipolar for a duration that could last from hours to months. Prior tothese requirements were located in the design clause because there are aspects of the requirements that are pertinent to design; however, they were moved to their present location in recognition that the requirements are more pertinent to installation. The joint factor is in recognition of the assumed integrity of any mill seam weld and the nondestructive inspection criteria associated with the pipe manufacture.

For such stresses, z626 arrest of propagating fractures comes into doubt, and the conventional industry practice is to ensure that the pipe has sufficient notch toughness properties to result in a predicted fracture length that is reasonable. Piping items that are manufactured in accordance with the requirements of a standard or specification listed in NACE MR have been exempted from csw requirement to be marked with a designator for csx service, in recognition of the fact that such markings have not been used historically, and imposition of such additional marking requirements would be onerous and unjustified based on the past performance of such materials.

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You need to log in before adding standards cda the monitoring service. For example, if a m long class location assessment area containing nine 033 units falls between two m long undeveloped class location assessment areas, the area containing the nine dwelling units could be designated as Class 1, regardless of the dwelling unit density, uses, and types of occupancy that exist outside its boundaries.

As described in Table 4. The list of such standards has been modified for clarity.

Any imperfections detected visually are to be assessed using the applicable acceptance criteria in Clause 7. If water is present in combination with the defined fluids, a 30 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.

The design formula establishes the basic relationship between design pressure, pipe size, pipe yield strength, and a number of factors that are intended to limit the design pressure, as follows. Please note that extra delivery cost and delivery time may apply for products ordered as hardcopy, as the products must a662 be shipped from our suppliers overseas. It is 6z62 that offsets greater than 1. X, Annex X, and Table X. Although most material standards and specifications are developed with some specific use in mind, the limitations on their use are not usually stated in the standard or specification.

There is no strict guidelines or consensus on the determination of interpass temperature, although typically it involves measuring the css metal temperature immediately adjacent to the weld joint within a short period of time after the weld bead has been deposited. Centrifugal pumps were moved to the new Clause 4. Corrosion Control 9. New Limitations 11 to 18 have been added in to ccsa more information and guidance with respect to material low-temperature notch toughness.

Z Commentary on CSA Standard Z

To provide some relief, alternative acceptance criteria are provided for materials that fail the regular guided-bend test requirements and have a specified minimum yield strength higher than MPa. Methods of heating and controlling cooling are not essential changes; however, this is useful information to provide on the welding procedure specification for guidance to ensure consistency in welding practices.

Inthis note was deleted. Changes greater that the essential changes given in Table 7. To comply with the numerical rounding practices of ASTM E 29, the pipeline cover dimension was changed from cm to m, and the clearance dimension was changed from cm to mm. The cover requirements are intended to protect the pipeline against external loads, scour, and third-party damage; however, it is recognized that there are other methods of providing such protection.

Standards Council of Canada

A branch connection, being a combination groove and fillet weld, would also constitute an essential change from a fillet weld or a butt weld. Gas that contains an average of 7 mg or less of hydrogen sulphide per cubic metre is considered to be sweet gas for contractual delivery purposes i.

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This Standard is not a design handbook, and the exercise of competent engineering judgment is a necessary requirement to be employed concurrently with its use.

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 cas. The clause notes direct the designer to useful reference materials, including a new Annex L, cda aid in this selection process.

Inthese requirements became applicable to all sizes of compressor and pump stations. Welders doing tack welding need to be qualified, and preheating is required for tack welding if preheating is required for production welding.

As defined in Clause 3, production welding is 003 execution of welds that are covered by the Standard and are to be part of a pipeline system. Note 4 in Clause 4. Carbon dioxide is a liquid while contained, but becomes a gas when released; accordingly, carbon dioxide pipelines are treated somewhat like gas pipelines, with Category II pipe being required for all design operating stresses greater than 50 MPa.

Flux cored arc welding was added to the list of permitted welding processes in For example, if a specified root face of 1. Most, but not necessarily all, of such variables are limited by the essential changes given in Table 7.

This requirement was not carried forward into the first edition of the Standard because it was noted that there was no specific requirement for the company to have construction specifications, procedures, and quality assurance standards. Carbon dioxide was added as a new service fluid in 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. The permissible length of the new Class 1 location assessment area should therefore be significantly greater than m, to recognize that some bunching of dwelling units typically occurs; otherwise, there will be a potential reduction in the z6622 of safety e.

Where the design operating cea or the hoop stress developed during pressure testing with a gaseous pressure test medium exceeds the applicable pipe threshold stress value given in Table 5. The first edition of the Standard was published inand it was developed by the amalgamation of the requirements that were previously contained in three CSA Standards: In Limitation 4, the terminology was changed in to clarify that impact testing for valves involves the testing of parts used in the manufacture of the valves and associated welds.