CSA B242:05 (R2025)

Description

Preface This is the third edition of CSA B242, Groove- and shoulder-type mechanical pipe couplings . It supersedes the previous editions published in 1980 and 1971. It is written in SI (metric) units. Changes from the previous edition of this Standard include the following: (a) Coverage has been extended to include mechanical groove-type couplings up to size NPS-42. (b) New illustrations and an entirely new set of definitions have been added. (c) Requirements for hot-dipped zinc (galvanized) coatings, electrodeposited zinc (plated) coatings, gaskets for drinking water applications, and stainless steel bolts and nuts have been added. (d) A new clause (Clause 4.5) to address alternative designs and materials has been added. (e) The pipe end preparation clause (Clause 5) has been updated to incorporate current data and has been expanded to include roll grooved copper tube and formed and roll grooved metallic tube. (f) The previous edition’s requirements for cast iron pressure pipe have been deleted because such pipe is no longer in common use. (g) The requirements for quality of work and finish have been expanded. (h) The tests clause (Clause 8) now includes a requirement for a vacuum test. (i) Quality system requirements for coupling manufacturers have been added. (j) An entirely new set of Annexes has been added. Some are written in normative (mandatory) language to facilitate adoption by users of the Standard or regulatory authorities. Annex B specifies coupling information to be supplied by the manufacturer on request. Annex D explains why galvanic corrosion is not a concern when ferrous couplings are used with copper tube. Annex E provides guidance on the information to be included in a manufacturer’s self-declaration of conformity. This Standard was prepared by the Technical Committee on Groove- and Shoulder-Type Mechanical Pipe Couplings, under the jurisdiction of the Strategic Steering Committee on Plumbing Products 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 groove-type mechanical pipe couplings for liquid and gas pressure pipes up to and including NPS-42 and shoulder-type mechanical pipe couplings for liquid and gas pressure pipes up to and including NPS-60. 1.2 This Standard includes minimum requirements for materials, chemical properties, physical properties, pipe groove and shoulder dimensions, finishes, and pipe coupling markings. 1.3 In CSA Standards, “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; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. 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.