This standard practice defines the necessary processes to design, install, and operate a thermoplastic-lined oilfield pipeline. Design processes covered in this standard include assessment of the service conditions, materials, chemical compatibilities of liner materials with any service fluid and additives, pipeline geometry, and risk analysis. The installation process includes site surveys, pipeline preparation, insertion, termination, pressure testing, reburial, and safety. Included in the standard are three appendixes covering the typical properties of liner materials, test procedures for thermoplastic liner materials, and calculating the effects of differential thermal expansion. This standard is maintained by Task Group (TG) 037.