Deformation prevention method for large-scale stainless-steel tank wallboard construction under high temperature environments

Abstract

The invention discloses a deformation prevention method for large-scale stainless-steel tank wallboard construction under high temperature environments. The method is characterized in that the methodincludes the following steps: a, a step of deformation prevention during the making of steel plates of tank wallboards; b, a step of deformation prevention during the welding operation of the tank wallboards; and c, a step of the arrangement of expansion rings for tank jacking. The characteristics of the method are that the wallboard welding under high temperature, high humidity and blown sand environments has longer stress release time than usual welding. The advantages of the method are that welding technologies are rigorous in measure design, and deformation prevention for tank wallboard construction is rigorous; welding stress release modes can be successfully buffered after tank wallboard welding construction is finished; welding deformation caused by releasing can be avoided; weldingquality of the tank wallboards is good, which passes the inspection standards of an American ASME standard and a Saudi Arabia SABIC standard which are in mutual combination and supplement and wins praises of owners; and relevant experience on deformation prevention for tank wallboard construction of petrochemical tanks can be accumulated.

Description

technical field [0001] The invention relates to an anti-deformation method for tank wall plate construction, in particular to an anti-deformation method for large stainless steel tank wall plate construction under high temperature environment. Background technique [0002] Chinese patent CN104002079A disclosed a method for assembling the spherical shell parts of a stainless steel spherical tank on August 27, 2014, which includes the following steps: [0003] In the first step, place the press-down template on the tire frame; [0004] In the second step, the stainless steel spherical tank shell plate to be assembled is placed on the lower pressure template; [0005] The third step is to place the upper pressure plate on the stainless steel spherical tank shell; [0006] The fourth step is to clamp and fix the upper pressure formwork, the stainless steel spherical tank shell plate and the lower pressure formwork by using the clamp; [0007] The fifth step is to weld the sta...

AI Technical Summary

Problems solved by technology

[0013] (5) The weld bead is wet or it rains during welding;

[0014] (6) There are differences or errors in the gap between groups;

[0015] (7) Failure to implement anti-deformation reinforcement measures (fixtures, etc.);

[0017] Therefore the tank wall construction of known large-scale stainless steel tank wall plate has the problem of above-mentioned various tank wall plate deformations

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