Steel-jacket Steam Insulated Pipe

Product Detail

Where the medium is steam or high-temperature hot water, ordinary PU insulation has reached its limit. The steel-jacket steam insulated pipe uses a steel outer casing instead of HDPE: the casing carries the earth and traffic loads, accommodates thermal expansion through sliding supports, and keeps the insulation dry.

The insulation build-up is chosen from the design temperature. A typical arrangement is a high-temperature layer of microporous calcium silicate against the carrier pipe, a glass wool or composite layer outside it, and a controlled air gap — each layer working at a temperature it can tolerate.

Thermal movement is the engineering point most often missed. The carrier pipe expands when it heats up; if it is rigidly connected to the jacket, either the insulation is crushed or the weld is overstressed. We fit sliding supports and internal guides so the pipe can move while the assembly stays intact.

The outer jacket can be left bare with anti-corrosion paint or supplied with a full 3PE coating for wet ground, river crossings and aggressive soil. Give us temperature, pressure, laying profile and soil data and we will return a complete build-up proposal.