High Pressure Flanged Stainless Steel Ball Valve Rigid Flange Connection

Description

Specifically engineered for large-scale industrial high‑pressure main pipelines, the flanged stainless steel ball valve offers outstanding pressure endurance and joint rigidity. Its 90‑degree quick‑turn mechanism enables swift isolation of steam, crude oil, and a wide range of corrosive chemical fluids, ensuring stable long‑distance service in chemical, power, and oil‑gas facilities.

The body is constructed from thick‑walled precision‑cast stainless steel and undergoes a factory hydrostatic pressure test, reliably sustaining Class 150 and Class 300 operating conditions. The ANSI Class 300 High Pressure Flanged Stainless Steel Ball Valve specification commonly available meets the demands of most overseas high‑pressure projects.

Two material grades are offered: 304 and 316L. The 316L stainless steel flange ball valve — with molybdenum added — delivers enhanced resistance to acids, alkalis, and chloride attack, making it suitable for highly corrosive media lines such as ammonia synthesis and seawater systems.

The mainstream design adopts a two‑piece configuration; the 2PC Flanged Stainless Steel Ball Valve is integrally cast for superior body strength. It features an ISO 5211 mounting pad as standard on top, allowing easy integration with pneumatic or electric actuators for automated operation. The integral thickened flanges at both ends, drilled with standard bolt patterns, ensure excellent joint rigidity after assembly, effectively counteracting tensile and shear stresses from thermal expansion and vibration — thus eliminating leakage at connections.

This substantially outperforms threaded ball valves in reliability, and large‑diameter versions like the 4 Inch Flanged Stainless Steel Ball Valve are extensively employed in long‑haul transmission pipelines. The flanges comply with ANSI, DIN, and GB standards, enabling installation and removal without pipe cutting, which greatly simplifies later maintenance.

Key Product Parameters

This valve is widely deployed in chemical, thermal power, oil & gas transmission, and seawater desalination sectors. A notable project case: Shandong Hengxin Chemical Group — at No. 19 Weiwu Road, Linzi Chemical Industrial Park — adopted these flanged ball valves for their high‑pressure ammonia synthesis pipeline system. The plant experiences sustained high pressure and wide temperature fluctuations, creating significant pipe stress. Thanks to the thickened body that withstands pressure surges and the rigid flange structure that accommodates pipe deformation, the system recorded zero flange leakage throughout the year, substantially reducing maintenance frequency.

Unlike threaded or sanitary clamp‑type ball valves that are confined to low‑pressure, small‑bore duties, this product is tailored for high‑flow, high‑pressure mainline applications, positioning it as a mainstream industrial shut‑off valve choice for overseas chemical and energy engineering procurement.