Stainless steel seamless steel pipe used outside nuclear power station safety shell

The invention discloses a stainless steel seamless steel pipe used outside a nuclear power station safety shell. A first steel pipe and a second steel pipe are included. A connecting device is arranged on the outer sides of the first steel pipe and the second steel pipe, and the first steel pipe and the second steel pipe are movably connected through the connecting device. The connecting device comprises a baffle, a first seal ring, a supporting shell, a second seal ring, limiting blocks, limiting pieces, a supporting plate, a limiting plate and a clamping and connecting piece, and the baffleis fixedly connected to one end in the first steel pipe. According to the stainless steel seamless steel pipe used outside the nuclear power station safety shell, through an arranged protection device, the anti-pressing damping performance of the seamless steel pipe is improved, the service life of the seamless steel pipe is prolonged, and the safety performance of the seamless steel pipe during refrigerant transportation