A welder's arc caused an explosion in the stern compartment

The main process of the accident:

Two oil workers at a shipyard were spraying the last coat of paint in a closed stern cabin. At noon, they finished the painting work. When they left the stern cabin, they left the manhole cover half-open and half-closed. There was no danger sign around the hatch cover.

Around 3 pm, an outfitting riveter came on board to install a small engine base. His work position was close to the stern cabin. When he was igniting the gas cutting, the riveter found that he did not bring an electronic torch, so he asked the welder to help him light the fire. The welder picked up the welding clamp and struck the arc on the stern cabin cover. Then there was a loud bang, and the stern cabin exploded. 8 people died and 6 people were injured on the spot.

The main reason for the accident:

(1) The combustible gas of benzene in the paint mixed with air reached the explosion limit. In addition, the hot weather exacerbated the concentration of the combustible gas of benzene, so it exploded immediately when it encountered fire.

(2) After the stern cabin was painted, no warning signs or guardians were set up.

(3) No ventilation measures were taken in the stern cabin after painting.

Main preventive measures——

(1) Warning signs and guardians should be set up around the stern cabin.

(2) Compressed air should be passed through the stern cabin to reduce the concentration of combustible gases.

(3) When the welder strikes the arc, he should pay attention to the surrounding environment, especially flammable and explosive items.