When welding stainless steel pipes, in order to reduce the tendency of thermal cracking, the microstructure design of the weld generally contains a small amount of ferrite, and the control of the ferrite content is mainly realized by the alloy composition. Austenitic stainless steel welds contain more than 3% ferrite, which can effectively avoid solidification cracks, but too much ferrite will have an adverse effect on performance.

Low-temperature carbon seamless steel pipe is a seamless steel pipe suitable for -45℃~-195℃ low-temperature pressure vessel pipes and low-temperature heat exchanger pipes.

The quality inspection method and steps of stainless steel seamless pipe seamless pipe are divided into seven steps.

Fire-fighting pipeline refers to the pipeline material used for fire-fighting, connecting fire-fighting equipment and equipment, and transporting fire-fighting water, gas or other media.

The eddy current detection of seamless steel pipe is to use the principle of electromagnetic induction to excite the probe coil with high-frequency sine wave current. When the probe is close to the metal surface, the alternating magnetic field around the line pattern will generate an induced current on the metal surface.

After the SSAW steel pipes are transported to the site, the pipes are first arranged according to the location of the equipment and pipe fittings, and the specific length of each steel pipe is measured on site, and the specific size and arrangement position are marked. In order to be seated according to the number at the interface, a crane is used to lower the pipe, and nylon slings are used for hoisting during the lowering process to protect the pipe insulation layer.