Pipe of small air separation unit before installation, check the orientation of the container orifice, the orientation of the valve inlet and outlet is correct. The pipe fittings should be thoroughly cleaned ten net and strictly degreased, while opening the welding bevels etc. The welded pipe must be brushed with clean stainless steel wire for a very short time before welding.
In order to reduce the cold box pipe welding mouth, can be prefabricated in a clean plant, and later for the final distribution. Piping principles, first big pipe, then small pipe, first lower, then upper, first in charge, then auxiliary pipe.
The pipes must be naturally aligned before welding. Forced alignment with the help of manpower is never allowed, in order to avoid increased buttressing stress. If the pipework cannot be carried out continuously during installation, the openings must be covered or wrapped with plastic sheeting. The pipe rack in the cold box should be kept stable enough for the pipe rack to be installed and should not be shaken at will, taking into account the thermal expansion and contraction of the pipe and self-compensation, and in accordance with the requirements of the pipe rack diagram.
Dear Air's piping is checked in strict accordance with the standards before installation of small air separation unit to ensure the safety of the piping installation.
