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CSA Z245.1:26

Steel pipe
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Steel pipe
Preface

This is the twelfth edition of CSA Z245.1, Steel pipe . It supersedes the previous editions published in 2022, 2018, 2014, 2007, 2002, 1998, 1995, 1993, 1990, 1986, and 1982. This Standard covers the requirements for steel pipe intended to be used for transporting fluids as specified in CSA Z662. The following are the major changes to this edition

  1. revised category requirements
  2. new definitions for hydrostatic test pressures and test unit
  3. revised optional product ordering requirements
  4. updated terminology for product analysis retests
  5. new requirements for welding procedure qualification testing
  6. new and revised mechanical test procedures requirements
  7. new and revised mechanical properties tests requirements
  8. revised mill hydrostatic testing requirements
  9. updated requirements for tolerances on dimensions
  10. updated markings requirements
  11. revised hardness requirements for sour service pipe
  12. revised requirements for elevated temperature service pipe
  13. revised requirements for strain-based design pipe
  14. revised certification requirements
  15. updated carbon equivalent formula
  16. revised Charpy test specimen sizes
  17. and updated tensile requirements for body elongation and yield strength.

This Standard was prepared by the Subcommittee on Materials, under the jurisdiction of the Technical Committee on Petroleum and Natural Gas Industry Pipeline Systems and Materials and the Strategic Steering Committee on Liquid and Gaseous Energy Systems, and has been formally approved by the Technical Committee

Scope
1.1 General

This Standard covers seamless pipe, electric-welded pipe (flash-welded pipe continuously welded and low-frequency electric-welded pipe excluded), and submerged arc welded pipe primarily intended for use in oil or gas pipeline systems.

Notes:

  1. Flash-welded pipe is pipe manufactured by a process using electric-resistance heating to produce a simultaneous coalescence over the entire area of the abutting edges and the application of pressure for joining
  2. Low frequency is defined as less than 70 kHz
1.2 Outside diameter, grade, and category

Note: It is not intended that pipe be available in all combinations of size, grade, category, and manufacturing process. The individual pipe manufacturers should be consulted to ascertain the availability of specific pipe items.

1.2.1 Outside diameter

This Standard covers pipe having specified outside diameters (ODs) from 21.3 to 2032 mm. The standard ODs are given in Table B.1.

1.2.2 Grade

For other than sour service, this Standard covers pipe from Grade 241 to Grade 825. For sour service, this Standard covers pipe from Grade 241 to Grade 483. Note: The standard grades are Grades 241, 290, 359, 386, 414, 448, 483, 550, 620, 690, and 825; however, intermediate grades may also be used.

1.2.3 Category

This Standard covers pipe in the following categories

  1. Category I — pipe without requirements for proven notch toughness properties
  2. Category II — pipe with requirements for proven notch toughness properties in the form of energy absorption and shear fracture area
  3. and Category III — pipe with requirements for proven notch toughness properties in the form of energy absorption.

Note: Pipe cannot be classified as Category II or Category III if it has not been notch toughness tested

1.3 Terminology

In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.
SDO CSA: Canadian Standards Association
Document Number
Publication Date Jan. 1, 2026
Language en - English
Page Count 124
Revision Level
Supercedes
Committee

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