air casing

air casing

[′er ‚kās·iŋ]
(engineering)
A metal casing surrounding a pipe or reservoir and having a space between to prevent heat transmission.
References in periodicals archive ?
Tenders are invited for Repair and renewal of air casing gas casing funnel uptake economizer gas casing roof casing and uptake casing with cladding of main boilers onboard in ships for duration of two years