Fire protection for LNG applications

The epoxy PFP coating can be used as an insulative method of protecting structural steel from exposure to the extremely cold temperatures that can result in the event of a cryogenic liquid spill, particularly relevant to the LNG market.

According to Paul Greigger, technical manager PITT-CHAR, PPG Industries, in the case of a cryogenic liquid spill, temperatures can suddenly drop down to −162 °C meaning that any insulation system protecting the steel needs to withstand these extremely low temperatures without becoming brittle and failing.

“For this purpose, the coating is applied in thicknesses ranging from 15mm to 38mm. After exposure to a cryogenic spill, the coating typically remains relatively undamaged and no additional maintenance is required. If a fire ensues, however, the coating will expand at high temperatures and form a protective char”, he said.

In fact, the ceramic-like layer of char is up to six times as thick as the original coating, insulating the steel against high environmental temperatures.

PPG says that the coating is suitable for applications where exterior durability and corrosion resistance are required.