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Pipe Fittings are fundamental connectors that construct the physical pathway of a piping system. They directly handle changes in flow direction (e.g., elbows), pipe diameter adjustments (e.g., reducers), flow splitting/merging (e.g., tees), or flow termination (e.g., caps). Their core role is to define and connect the routing and structure of the pipeline network. Pipe Accessories are components that extend functionality, enable control, and provide protection for the system. They regulate flow (valves), bear weight (supports/hangers), ensure sealing (flanges), purify fluids (strainers), monitor parameters (instruments), etc., with the core purpose of enhancing the system's safety, controllability, and operational efficiency.

Globe valves, prized for their reliable shutoff sealing and moderate throttling capability, play an indispensable role in industrial piping systems. Understanding their core working principle of "linear disc movement for mechanical sealing" and the standard "flow-under-the-disc" design is crucial for their correct selection, installation, and use. Selection requires careful consideration of specific pressure, temperature, media properties, sealing requirements, pressure drop limitations, and the need for throttling.

Ductile iron pipes widely use flexible joints for connections. These joints allow the pipe to deflect and expand/contract within a certain range to accommodate ground settlement or temperature changes.

The self-anchored ductile iron pipe adopts a special mechanical design to weld the ring to the socket end to achieve reliable anchoring performance, while retaining the flexibility of the joint, with good flexural performance, which can replace the function of the constraint block and realize the design without constraint blocks.

A butterfly valve is a structurally simple and compact fluid control valve. Its core components include a valve body, a rotatable disc-shaped "butterfly" plate, a stem that drives the disc, and a sealing seat. The valve operates through a 90-degree rotational motion: when opening, the disc rotates from a position perpendicular to the pipeline axis (closed state) to parallel with it (fully open), allowing unobstructed flow; when closing, the disc rotates 90 degrees back to block the flow path, with its edge pressing tightly against the seat to form a sealed ring, thereby stopping fluid flow.

​Beneath our cities' streets lies an unsung hero of urban development - ductile iron pipe. This remarkably durable material has quietly revolutionized water distribution systems since its introduction in the mid-20th century, offering an ideal balance of strength and flexibility that traditional cast iron couldn't match.