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Installation of the insulation system for utility steam generators

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Update time : 2018-01-20 17:12:21
The following product characteristics are important when selecting a suitable insulation system for utility steam generators:
l The insulation used must be non combustible.
l The maximum working temperature of the insulation must be
higher than the operating temperature of the installation  
component to be insulated.
l The thermal conductivity must be related to the temperature.
l The (longitudinal) air flow resistance must be as high as possible. High flow resistances reduce convection in the insulation.

In addition to protection against contact and the maximum permissible surface temperatures of 140。F [60。C], industrial parameters such as efficiency factors must be considered during the design of the insulation thickness. In the AGI guideline Q101, "Insulation works on power plant components" recommends that the insulation layer thicknesses for power plant components is designed for a maximum heat flow rate density of 47.5 BTU/hr.ft2 (150 W/m2 ). In view of rising energy prices and CO2-emission reductions, from an economic and environmental perspective, a design parameter of well below 47.5 BTU/hr.ft2 (150 W/m2) is often sensible. Rosewool@ insulation have proven invaluable when used in the insulation of utility steam generators over the years.They can be cut into any shape and can be easily mounted onto the various geometries or surface structures. Rosewool@ insulation products are non combustible, have high maximum working temperatures and exhibit a low degree of thermal conductivity across the entire temperature range. 
 
The insulation system consists of mutiple layers, including two to three layers of insulation. Rosewool@ insulation with a maximum working temperature of 1200。F ( 650。C) are a tried and tested solution as a first insulating layer in upper temperature ranges, as are often used in dead spaces. Outer layers can be constructed with different types of Rosewool@ insulation to optimize the overall performance, depending on the temperature of the adjacent layer. AGI guideline Q101 suggests, galvanized wire netting and galvanized stitching wire in wired mats can only bear a temperature of 750。F ( 400。C). When temperature above 750。F (400。C), austenitic stainless steel wire netting and stitching wire must be used. To reduce the convection in the insulation of vertical constructions such as boilers, only use insulations that exhibit an air flow resistance of 350 kPa s/m2.