Processing Magazine

Eliminating the need for inner welded thermoplastic liners

December 1, 2012

Durcor_Piping_System-2Durcor piping can withstand the inner corrosion demands of virtually every chemical in the chemical processing industry, as well as environmental external corrosion, without the need for external painting or use of inner welded thermoplastic liners, says its maker, Kentwood, Mich.-based Pureflex.

Durcor is a single-piece PTFE liner inside a composite housing developed for high production manufacturing. Durcor is made in dedicated PLC-controlled automatic machines with little human involvement, in a method designed by PureFlex to impart optimum properties in both hoop and axial pipe directions. According to its maker, in comparison to options existing today:

Durcor is much lighter than high alloy pipe, possesses similar stiffness/weight ratios, can provide the same pressure ratings for CL 150 applications and is much easier to install with no rigging and minimal labor.

In comparison to fiberglass, Durcor has universal internal corrosion resistance, so multiple pipe materials are not required to be inventoried due to various chemistries in process. Durcor has over 200% greater stiffness than fiberglass pipe, reducing the need for extra pipe supports.

Durcor is much lighter and easier to install than fluoropolymer-lined steel. Durcor housings are also vented to release permeated gases; however, the formation of acidic by-products does not corrode the Durcor housing. The thermal insulation characteristics of both the PTFE liner and composite housing make Durcor an excellent insulator. In comparison to dual laminate, Durcor PTFE liner has no seams to fail.

Durcor piping includes CL150 pipe, fittings, hoses, expansion joints, butterfly valves, sight flow indicators and Van Stone flanges. Pureflex