The benefits of composite materials - light weight, corrosion resistance, handling ease, etc., have tong been appreciated. Composite piping systems are gaining wide acceptance in various industries such as petrochemical, offshore oil & gas, pulp and paper, and marine industries. The modern numerically controlled, multi-axis filament winding machines have brought the manufacturing of composite pipe into a new era. With the Multi-Angle filament winding technology, an optimal combination of different winding angles can be designed to satisfy specific mechanical requirements such as hoop and axial stiffness and strength, support span, internal and external buckling pressure, etc. In this paper, comparisons are demonstrated among several multi-angle pipe with traditional 54- degree wound pipe on various mechanical properties.

Over the past twenty years, the various resin manufacturers have done an excellent job of identifying the range of chemical environments and maximum temperatures their resins can be considered for long term performance Today, it is unusual to hear of a premature failure due to chemical attack on a properly manufactured and cured laminate. If the chemical engineer and/or corrosion engineer can find their intended service listed in a corrosion guide published by a reputable resin producer, potential problems due to chemical attack are highly unlikely.

Composite Pipe Systems are lightweight, corrosion resistant, and are much less expensive than stainless steel, copper-nickel or exotic alloys. It is estimated that composite pipe systems can be designed to handle over 90 percent of the chemical solutions used in the Chemical Process Industries today, as long as the service is within the temperature limits of the resin chosen and the operating pressure is under 150 psi, (10 Bar). In addition, composite pipe systems offer low maintenance, low friction losses, low thermal conductivity, and the ability to design for F/MESS FOR PURPOSE: While standard composite piping materials are non-conductive, withstand hydrocarbon fires up to 2OOOF, (1lOOC).

However, today, as in the past, many mechanical and civil engineers responsible for detail piping design do not understand the unique mechanical characteristics of composite materials and the design flexibility available to the design engineer. The ability to design for ?FITNESS FOR PURPOSfis one of the major advantages of composite pipe systems.

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