High operating temperature: Under the condition of strong corrosive medium, it can meet the operating temperature range of -60℃～150℃. Within this temperature range (except molten alkali metals, elemental fluorine and aromatic hydrocarbons), it can meet all chemical media. Vacuum resistance: within the range of -60℃～150℃, it can be used under vacuum conditions. In chemical production, partial vacuum is often caused by cooling, vertical discharge, and asynchronous operation of pumps and valves. High pressure resistance: in the temperature range, it can withstand a pressure of up to 3Mpa. Anti-penetration: Select high-quality polytetrafluoroethylene resin, processed into a high-density, sufficient thickness PTFE lining layer through advanced lining technology, so that the product has superior anti-permeability. The integral molding and sintering process lining solves the problem of steel-fluorine hot and cold expansion and contraction, so that it can achieve synchronous expansion. It adopts standardized size preparation, especially the pipes and pipe fittings used in chemical pipelines are highly interchangeable, which provides great convenience for installation and spare parts.