CAN/CSA-Z662-99

Preface

This is the third edition of CSA Standard Z662, Oil and Gas Pipeline Systems. It supersedes previous editions published in 1996 and 1994. This Standard is part of the Pipeline Systems and Materials segment of CSA’s Transportation program.

The delta symbols in the left hand margin identify parts of this Standard that have substantively changed from the previous edition. The following are the most significant changes, relative to the previous edition:

(a) It has been clarified that compressor stations, pump stations, measuring stations, and pressure-regulating stations are within the scope of the Standard irrespective of their location within the pipeline system.

(b) The definitions and requirements concerning pressure control and overpressure protection have been revised.

(c) The requirements concerning class location end boundaries have been modified.

(d) It is now permissible for ASME Standard B31.3 to be used for the design, materials, welding, and pressure testing of compressor station piping and pump station piping.

(e) Requirements have been added to cover the design of underground tanks, and the requirements for aboveground tanks have been modified.

(f) Restrictions have been added concerning the design pressure for piping containing pipe that is made to a standard or specification other than CSA Standard Z245.1 and API Specification 5L.

(g) It is now permissible to use pipe and components manufactured to specific non-CSA standards or specifications, without first having to determine that CSA pipe and components are not available.

(h) The requirements for proven notch toughness properties for pipe have been modified.

(i) Requirements have been added for the management of the integrity of pipeline systems during their operation, maintenance, and upgrading.

(j) Requirements have been added to cover reactivation of deactivated piping, and to cover abandoning of piping.

(k) Requirements have been added as Clause 15 to cover the design, construction, operation, and maintenance of aluminum piping.

(l) Nonmandatory guidelines for risk evaluation have been added in Appendix B, so that it now covers the risk assessment component of risk management.

(m) Nonmandatory guidelines for in-line inspection of pipelines have been added as Appendix D.

The requirements of this Standard are considered adequate under conditions normally encountered in the oil and gas industry.

Requirements for abnormal or unusual conditions are not specifically provided for, nor are all details related to engineering and construction prescribed. It is intended that all work performed within the scope of this Standard meet the standards of safety and integrity expressed or implied herein.

It is expected that changes may have to be made from time to time based on new experience and technology. When necessary, amendments and supplements will be made by the Technical Committee and published in accordance with CSA practices.

This Standard was developed by the Technical Committee on Oil and Gas Industry Pipeline Systems under the jurisdiction of the Strategic Steering Committee on Oil and Gas Industry Systems and Materials and has been formally approved by the Technical Committee.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Scope

1.1

This Standard covers the design, construction, operation, and maintenance of oil and gas industry pipeline systems that convey

(a) liquid hydrocarbons, including crude oil, multiphase fluids, condensate, liquid petroleum products, natural gas liquids, and liquefied petroleum gas;

(b) oilfield water;

(c) oilfield steam;

(d) carbon dioxide used in oilfield enhanced recovery schemes; or

(e) gas.

Note: Designers are cautioned that the requirements in this Standard may not be appropriate for gases other than natural gas, manufactured gas, or synthetic natural gas.

1.2

The scope of this Standard, as shown in Figures 1.1 and 1.2, includes

(a) for oil industry fluids, piping and equipment in offshore pipelines, onshore pipelines, tank farms, pump stations, pressure-regulating stations, and measuring stations;

(b) oil pump stations, pipeline tank farms, and pipeline terminals;

(c) for carbon dioxide pipeline systems, piping and equipment in onshore pipelines, pressure-regulating stations, and measuring stations;

(d) for gas industry fluids, piping and equipment in offshore pipelines, onshore pipelines, compressor stations, measuring stations, and pressure-regulating stations;

(e) gas compressor stations; and

(f) gas storage lines and pipe-type and bottle-type gas storage vessels.

1.3

This Standard does not apply to

(a) piping with metal temperatures below -70°C;

(b) piping (except oilfield steam distribution piping) with metal temperatures above 230°C;

Note: Although not specifically covered by this Standard, designs for higher temperatures may be used, provided that the effects of such higher temperatures are accounted for.

(c) gas piping beyond the outlet of the customer's meter set assembly (which is covered by CGA Standard CAN/CGA-B149.1);

(d) piping in natural gas liquids extraction plants, gas processing plants (except main gas stream piping in dehydration and all other processing plants installed as part of gas pipeline systems), gas manufacturing plants, industrial plants, and mines;

(e) oil refineries, terminals other than pipeline terminals, and marketing bulk plants;

(f) abandoned piping;

(g) in-plant piping for drinking, make-up, or boiler feed water;

(h) casing, tubing, or pipe in oil or gas wells, wellheads, separators, production tanks, and other production facilities;

(i) vent piping for waste gases of any kind operating at or near atmospheric pressure;

(j) heat exchangers;

(k) liquefied natural gas systems (which are covered by CSA Standard Z276);

(l) liquid fuel distribution systems;

(m) loading/unloading facilities for tankers or barges;

(n) refuelling facilities; and

(o) hydrocarbon storage in underground formations and associated equipment (which is covered by CSA Standard Z341).

1.4

This Standard is intended to establish essential requirements and minimum standards for the design, construction, and operation of oil and gas industry pipeline systems. This Standard is not a design handbook, and the exercise of competent engineering judgement is a necessary requirement to be employed concurrently with its use.

1.5

The requirements of this Standard are applicable to the operation, maintenance, and upgrading of existing installations; however, it is not intended that such requirements be applied retroactively to existing installations insofar as design, construction, and established operating pressures are concerned.

1.6

Where any requirements of this Standard are at variance with the requirements of other publications incorporated by reference into this Standard, it is intended that the requirements of this Standard govern.

1.7

It is not the intent of this Standard to prevent the development of new equipment or practices, or to prescribe how such innovations should be handled.

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