Exterior covering for insulated steam pipes

soot_seeker_2

Is anyone aware of an exterior pipe wrap material other than PVC? The steam lines in my plant are fiberglass insulated & covered with white PVC. Theses covers provide easy-to-clean surfaces & protect the fiberglass wraps from damage, but they have a critical weakness. When the fiberglass insulation gets wet (from washdown operations), it transmits heat very effectively to the PVC & melts it. I'm wondering if there's an heat-safe product available to protect fiberglass wraps.

Brad White_9

Childers Aluminum

Per previous post:

"Childers" 0.016 corrugated aluminum seamless jacket joined with rivets on insulated surfaces. Jacket to be joined at lap seam by rivets every three (3) inches on center. Joints shall be staggered 90 degrees apart, and lapped no less than two (2) inches".