Preface
This is the ninth edition of CSA Z245.15, Steel valves. It supersedes the previous editions published in 2013, 2009, 2005, 2001, 1996, 1991, 1987, and 1981.
This Standard covers the requirements for steel valves intended to be used for transporting fluids as specified in CAN/CSA-Z662.
Some of the main changes to this edition include the following:
a) revised optional product ordering requirements (Clause 4.1.2);
b) revised drain and bypass connections, and sealant fittings requirements (Clauses 5.7 and 5.8);
c) revised seat tests requirements (Clause 9.4);
d) revised sour service requirements (Clause 13);
e) revised Table 5 Ring and groove dimension C for PN 420 full-bore, NPS 2-1/2 valves;
f) revised Table 8; and
g) revised furnace calibration and survey requirements (Annex C).
In this 2017 edition, where a major change or addition to the previous edition of this Standard has been made, the clause, table, or figure affected is identified by the symbol in the margin. Users of this Standard are advised that the change markers in the text are not intended to be all-inclusive and are provided as a convenience only; such markers cannot constitute a comprehensive guide to the revisions made to this Standard. Care must therefore be taken not to rely on the change markers to determine the current requirements of this Standard. As always, users of this Standard must consider the entire Standard.
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 Petroleum and Natural Gas Industry Systems, and has been formally approved by the Technical Committee.
Scope
1.1 General
This Standard covers steel valves primarily intended for use in oil or gas pipeline systems. The following types of valves are covered:
a) gate valves;
b) plug valves;
c) ball valves; and
d) check valves.
1.2 Size, nominal pressure class, and category
1.2.1 Size
This Standard covers valves in sizes from NPS 2 to NPS 60. (See Table A.1.)
1.2.2 Nominal pressure class
This Standard covers valves having cold working-pressure ratings designated by nominal pressure classes from PN 20 to PN 420. The standard nominal pressure classes are shown in Table 1. (ASME class designations are shown in Table B.1.)
1.2.3 Category
This Standard covers valves in the following categories:
a) Category I: valves without requirements for proven notch-toughness properties; and
b) Category II: valves with requirements for proven notch-toughness properties.
1.3 End configuration
This Standard covers standard end requirements for flanged, buttwelding, nd wafer-type valves. Other end configurations are considered non-standard and are subject to agreement between the purchaser and the manufacturer.
1.4 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.
