PURPOSE This specification was formulated to provide for the availability of safe, dimensionally and functionally interchangeable high pressure fiberglass line pipe with a Specification 15HR Standard Pressure Rating from 500 lbf/in2 to 5000 lbf/in2, inclusive, in 250 lbf/in2 increments. This specification is limited to mechanical connections. Technical content provides requirements for performance, design, materials, tests and inspection, marking, handling, storing and shipping. Critical components are items of equipment having requirements specified in this document.