ASTM SCH40 & SCH80 PVC-U/C Union

Key Features

• ASTM SCH40/SCH80 compliant: meets ASTM wall thickness standards.
• Detachable connection: three parts; loosen nut to separate pipes.
• Solvent cement joint: both end bodies permanently bonded to pipes.
• O-ring seal: internal O-ring provides reliable, corrosion-resistant sealing.

Manufacturing Process

Three main components injection molded from PVC-U/C; O-ring groove precision machined. Seals are EPDM or FPM (fluoroelastomer) for chemical resistance. Socket dimensions conform to ASTM tolerances.

Critical Process Parameters

• Control of thread fit accuracy between body and locking nut.
• Precise machining of O-ring groove dimensions for proper seal compression.
• Precise machining of socket ID, ovality, and chamfer conforming to ASTM tolerances.

Raw Material Characteristics

• Material Composition: Body and nut: PVC-U or PVC-C. Seals: EPDM or FPM (fluoroelastomer).
• Material Properties: PVC-U suitable ≤60°C; PVC-C suitable ≤93°C.
• SCH40/SCH80 wall thickness options available.
• EPDM resists acids/alkalis and aging; FPM resists strong acids and high temperatures.

Typical Applications

• Installed at inlets/outlets of valves, pumps, and instruments in ASTM chemical piping.
• Industrial pipe sections requiring periodic disassembly for cleaning or inspection.
• Placed in long straight runs for sectional disassembly.

Application Scenarios

• Nodes requiring frequent disassembly and maintenance in ASTM industrial piping.