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适用范围：<p id="s00002">1.1 This specification covers requirements for polyvinylidene fluoride drainage systems for corrosive applications. Requirements for material, pipe and fittings are included. Polyvinylidene fluoride includes emulsion/suspension polymerization and copolymers of vinylidene fluoride/hexafluoropropylene produced by either method. </p> <p id="s00003">1.2 These requirements apply to Schedule 40 and 80 IPS, SDR 32.5, and SDR 21 pipe sizes. Pipe and fittings are to be joined by heat fusion or mechanical methods using the equipment supplied by the manufacturers. </p> <p id="s00004">1.3 This specification is not intended to provide for interchangeability between plastic pipe and fittings from different manufacturers, but it does allow for transition fittings for joining one manufacturer''s product to another''s product, provided the joining technique used is other than heat fusion. </p> <p id="s00005">1.4 This specification is not for polyvinylidene pressure systems. </p> <p id="s00006">1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.</p> <p id="s00007">1.6 Notes and appendixes are not a mandatory part of this specification. </p> <p id="s00008">1.7 <span class="italic"><span class="med">The following safety hazard caveat pertains only to the test method portion, Section 8, of this specification: </span><span class="italic">This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. </span></span>