Explosion test indicated that hyperbaric air is not explosive but the flammability of objects within the chamber is greatly increased,so some explosion-proof measures have been taken in the hyperbaric welding test chamber.

It was constituted by a regulating gas storage,a hyperbaric test tank,a verifying-gas tank,and a controlling and monitoring system.

It consists of a regulating gas storage, a hyperbaric test tank, a verifying-gas tank, and a control and monitor system.

Study on the welding test of TA2 titanium alloy;

In welding test of TCS stainless steel, it was found that impact absorbing energy of heat-affected zone(HAZ)near bond line in welded joint was low.

Also confirms the electrodes and welding technologies by welding test and procedure qualification,successfully used on the welding of transfer stovepipe.

It is shown by metallographic analysis and welding experiments that breaking of PDC when welding could be attributed to the metallurgical fissures in the PDC inserts.

This paper introduced the repairing technology of the single point mooring equipment of Float Production Storage Off load(FPSO) and the solutions for the technological difficulties during the process which are mainly about the welding experiment and the temperature control technology,provided an example for the similar enterprises to repair such a significant equipment of marine projects.