Installation of Titanium and Titanium Alloy Pipes

The installation of titanium and titanium alloy pipes shall strictly prevent contact with iron-containing materials and avoid any mechanical impact or collision during handling and assembly.

The cutting of titanium and titanium alloy pipes shall be performed using mechanical methods. Cutting operations should be carried out at a low speed as far as practicable. When cutting or grinding with a grinding wheel, special grinding wheels suitable for titanium materials shall be used. Flame cutting is strictly prohibited. Groove preparation shall also be completed by mechanical processing methods to ensure quality and prevent contamination.

Welding of titanium and titanium alloy pipes shall be carried out using inert gas shielded welding or vacuum welding processes. Oxygen-acetylene welding, carbon dioxide gas shielded welding, and conventional manual arc welding are not permitted, in order to avoid oxidation and degradation of weld quality.

During installation, iron tools or materials shall not be used to strike, squeeze, or directly contact the pipes. Rubber pads or soft plastic sheets shall be placed between carbon steel supports or hangers and titanium or titanium alloy pipes to prevent direct contact. Where pipes pass through walls or floors, sleeves shall be installed. The clearance between the pipe and sleeve shall not be less than 10 mm, and the gap shall be filled with insulating materials free from iron impurities.

Titanium and titanium alloy pipes shall not be directly welded to other metal piping systems. Where connection is required, live (floating) flange connections shall be adopted. Non-metallic gaskets such as rubber or plastic gaskets may be used, and the chloride ion content of gasket materials shall not exceed 25 ppm to prevent corrosion risk.