lng cooling is the storage tank insulation layer of liquefied natural gas. There are corresponding standards and requirements for the insulation layer of lng storage tank. The difficulty lies in the limited working space between the inner and outer tanks where the elastic felt is installed. Tank wall cooling generally includes the installation of tank wall elastic felt, tank wall and ceiling expansion joint installation, expansion perlite retaining wall installation.
And the tank wall is limited space to keep cold, than the construction of building or air pipe insulation is more difficult. Combined with the height of the tank required by the design, the wall of the tank is bonded to the cold nail. When installing the elastic felt, the electric hanging basket is used to move up and down. It is difficult, risky and inefficient to move up and down in a 0.6m wide narrow space. Therefore, HSE management must be strictly implemented in the construction process to ensure safe construction.
Before the tank wall is refrigerated, the restricted working space between the inner and outer tanks must be 0.6m wide; otherwise, the moving space of the electric hanging basket up and down is not enough to move the hanging basket, and the normal installation of the elastic felt cannot be guaranteed, which will affect the construction period and cause delay or poor installation effect.
The insulation construction practice of lng is to install Uetersen's lng elastic felt with adhesive explosive cooling nails first, and then according to the construction requirements, the use of perlite cover installation, to meet the requirements of insulation design, but also to ensure that the thickness of the insulation layer is up to standard. Uetersen elastic felt is a popular special insulation material for lng in China, with excellent elasticity and extended tensile strength, convenient cutting and light weight, which greatly reduces the difficulty of construction and improves the insulation effect.