Socket welding tee is a high-pressure tee pipe connection accessory. It is mainly a high-pressure tee pipe connection fitting that is formed by die-forging blanks of round steel or steel ingots, and then processed by lathes. According to the form, it is divided into equal diameter socket tee and variable diameter socket tee. It is mainly suitable for departments and fields that require high pressure and precise dimensions such as petrochemical industry, medicine and health, electric power, aerospace, fire protection, metallurgy, shipbuilding, gas, nuclear power, and environmental protection.