PIR-Polyisocyanurate foam is a new professional cryogenic thermal insulation material. It's better than polyurethane foam（PUF） both in physical properties and fireproof performance, especially in thermal insulation and flame retardance. It has low thermal conductivity, wide service temperature, dimensional stability. It can be prefabricated or cut by client requested,such as slab, shell, tee joint, reducer, irregular part and etc,