Multiple blasting treating method

A blasting method of blasting articles to be treated in a pressure vessel, comprising:

• an installing step of installing two or more articles to be treated at a predetermined spacing in the pressure vessel;
• an initial blasting step of blasting one of the articles to be treated;
• and
• a following blasting step of blasting the other article to be treated next to the previously blasted article after a particular time from the instant of the previous blast, wherein
• each of the articles is blasted sequentially through the initial blasting step and the following blasting step,
• wherein the particular time is determined according to the spacing between the articles to be blasted, in such a manner that the explosion shock wave caused by explosion of the previously blasted article reaches the next article to be treated after the next article is blasted in the following blasting step.

A blasting method of blasting articles to be treated in a pressure vessel, comprising:

• an installing step of installing two or more articles to be treated at a predetermined spacing in the pressure vessel;
• an initial blasting step of blasting one of the articles to be treated;
• and
• a following blasting step of blasting the other article to be treated next to the previously blasted article after a particular time from the instant of the previous blast, wherein
• each of the articles is blasted sequentially through the initial blasting step and the following blasting step,
• wherein the particular time is determined according to the spacing between the articles to be blasted, in such a manner that the explosion shock wave caused by explosion of the previously blasted article reaches the next article to be treated after the next article is blasted in the following blasting step,
• wherein a vessel of a shape extending in a particular direction is used as the pressure vessel and wherein two or more articles to be treated are installed at a predetermined spacing in the longitudinal direction of the pressure vessel in the installing step.