There are certain criteria to judge whether we are qualified or not. As a product, condenser has been put into production. Before that, there are criteria to judge whether it is qualified. The following methods are introduced for condenser manufacturers. 1. The surface of the bottom tyre should be smooth, and there should be no obvious tool scars, pits, sandwiches and other mechanical defects. 2. The weld bead on the bottom tire surface should be straight and regular, and the width of the weld should not exceed 1.5 times of the steel plate and thickness. The weld joint of the condenser should be smooth transition, and no slag inclusion, blowhole, undercut and impermeable defects are allowed.
3. The weld on the bottom tire surface should be polished before sandblasting.
4. The misalignment of butt weld on the bottom surface of the condenser is less than 10% of the thickness.
5. Flange roughness is less than 0.15% of diameter.
6. The tightening surface of butt flange should ensure the sealing under design pressure.
In addition, the small braid reminds the enamel factory that heat treatment (dehydrogenation) must be carried out to eliminate the hydrogen infiltrated into the base material of the explosion part when the condenser is damaged. Sandblasting is to roughen the surface of the bottom tyre, increase the surface free energy and specific surface area, thereby improving the adhesion between the bottom tyre metal and the bottom glaze.
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