This standard describes the material, application, and field-procedure requirements for protective exterior coatings consisting of heat-shrinkable, cross-linked polyolefin coatings. ANSI/AWWA C216 also describes the application of protective exterior coatings to special sections, connections, and fittings to be used in underground and underwater steel water pipelines. Heat-shrinkable, cross-linked polyolefin coatings may be field or shop applied as provided in this standard. This standard describes only heat-shrinkable coatings that consist of a cross-linked polyolefin backing that has been coated with an adhesive. These coatings are referred to as heat-shrinkable coatings throughout the remainder of this standard. Major revisions made to this edition of the standard are too numerous to list here and can be found in the Foreword section of the standard.