1.1 This specification covers cylindrical billets made from stress-rated high-density polyethylene (HDPE) materials. 1.2 The billets are manufactured by application of molten extruded material onto a rotating mandrel using a thermally controlled bonding production process to form the wound profile into a monolithic thick-walled cylindrical tube. Machining operations to produce the final billet dimensions before dimensioning are acceptable. 1.3 The billets are intended for further fabrication into pressure vessel components including, but not limited to, pipe fittings such as flange adapters, reducers, or other pressure vessel components. 1.4 Requirements for and use of the resulting engineered structures shall be in accordance with an applicable product specification. This specification for billets does not include requirements for items fabricated from the billets. 1.5 This specification includes thermoplastic pipe material designation codes for selection of appropriate stress-rated material together with performance requirements for billets and test methods for determining conformance with the requirements. 1.6 Minimum quality control measures are prescribed for manufacturers. See Annex A for quality control for billets conforming to this specification. 1.7 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.
Keywordscylindrical Billet; stress-rated; polyethylene
The plastics industry has a history of creating large monolithic structures for use in fabrication of more complex shapes by application of fabricating tools and techniques that are widely used in other industries especially metal working. This standard could be used by manufacturers of finished goods to specify their starting materials as billets of standard dimensions and quality. This standard could be cited as a reference in the materials sections of finished product standards within the F17 committee.Back to Top