Pressure vessels with quick opening closure are widely used in chemical

aerospace

medical

natural gas and other industrial fields. Quick opening closure is the key equipment for the gas pipeline

and is subject to foreign markets for a long time

which seriously impacts on the present development of China’s nature gas industry. Especially

foreign companies have a monopoly on the high-pressure and large-diameter quick opening closure in the international market. In 2015

successful trial production of localization of quick opening closure broke the foreign monopoly. As the increasing domestic demands of quick opening closure

the welding deformation and leakage problems of quick opening closure and pressure vessel shell are increasing. By summarizing years of welding experience of quick opening closure equipment

measures such as drawing up the welding instructions

welder getting a certificate

the prevention and control of welding deformation are adopted and obtain a good effect

which can provide reference and reference for peers.