ASTM A403 WP321 Cap Stainless Steel Butt Weld Fitting 10" Sch80

What is Butt Weld Cap?
Butt Weld Cap is a pipe fitting used to permanently seal the end of a pipeline. It is directly connected to the end of the pipeline through butt welding, forming a complete and leak free sealing structure with strength equivalent to the pipeline itself. Due to its sturdy and reliable characteristics, butt welded pipe caps are the standard solution for achieving pipeline terminal sealing in industrial pipelines, pressure vessels, and pipeline manifolds. They can withstand the pressure and temperature of the entire system, ensuring process safety.

Material Properties of WP321
WP321 is a titanium (Ti) stabilized austenitic stainless steel designed specifically for high-temperature conditions. Its core advantage lies in the fact that the added titanium element can effectively suppress the precipitation of chromium carbide during welding or high-temperature service (425-850 ° C), thereby greatly improving the material's resistance to intergranular corrosion. This feature enables WP321 fittings to maintain excellent corrosion resistance without the need for further heat treatment after welding, making them highly suitable for welding pipeline systems that require long-term operation in high-temperature environments.

WP321 Cap Application Scenarios
The 10 inch Sch80 large-diameter, thick walled WP321 pipe cap is a heavy-duty component designed specifically for sealing high-temperature and high-pressure pipelines. It is mainly used at the end of process pipelines and main pipelines in industries such as petroleum refining, chemical engineering, and power generation, such as heating furnace pipelines, reactor pipelines, and steam header heads. The WP321 material ensures long-term stability and safety in high-temperature corrosive media, while the thick wall of Sch80 provides sufficient strength to withstand high pressure.