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Promoting the Use of Fiberglass Equipment
Lined with Corrosion Resistant Plastic

United States Standards

ASME: American Society of Mechanical Engineers

  • ASME RTP-1 Reinforced Thermoset Plastic Corrosion Resistant Equipment, Mandatory Appendix M-12 Dual Laminate Vessels
  • ASME Section X Fiber-Reinforced Pressure Vessels
  • ASME B31.3 Process Piping


The use of reinforced thermoset plastic (RTP) vessels operating at pressures not exceeding 15 psig external and/or 15 psig internal above any hydrostatic head, which contain corrosive and otherwise hazardous materials, dictates the need for rules and/or stress analysis concerning materials of construction, design , fabrication, quality control, and inspection of such equipment. In developing rules for RTP, the Committee has adapted to RTP the principles of rules included in Section VII, Division 1, of the ASME Boiler and Pressure Vessel Code, wherever they are applicable

Adaptation of standard rules to RTP requires recognition of differences which exist between metallic materials and RTP. These differences are addressed in the remainder of this Introduction.