Core Structure and Working Principle
Basic Composition: The core of a grooved pipe connection consists of three components: a rubber sealing gasket, a coupling (clamp), and locking bolts. The rubber gasket is placed against the outer surface of the pipe, fitting into the pre-formed groove; the connection is secured by clamping the coupling around the joint and tightening the bolts. The sealing performance automatically improves in tandem with rising internal fluid pressure.
Heat-Enhancing Grooved Pipes: Grooved pipes designed for heat exchange fall into three categories: rolled-groove, spiral-groove, and transverse-ribbed pipes. They enhance heat transfer by altering fluid flow dynamics to increase turbulence. Notably, the heat transfer coefficient of spiral-groove pipes can reach 1.5–2.0 times that of smooth pipes, while the heat transfer efficiency of transverse-ribbed pipes is 3–8 times that of standard pipes.
Key Technical Parameters and Standards
Specifications and Pressure: Standard applicable pipe diameters range from DN25 to DN600, with large-diameter grooved connections now extending up to DN2000. Pressure ratings can reach up to 2.5 MPa, and products must comply with national standards such as GB/T 36019-2018, "Technical Specification for Grooved Pipe Fittings."
Selection Principles: A combination of grooved and threaded structures may be used for working pressures ≤1.6 MPa, whereas a full grooved structure is required for pressures between 1.6 MPa and 2.5 MPa. Mechanical tees and crosses are preferred to reduce costs when there are no specific structural strength requirements; however, these types of fittings should be avoided if rigid connection requirements exist.
