Dimensional and Thread Standards of Green-White UPVC Threaded Pipe Fittings

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Inner and Outer Threads Receive Dual-Stage Cutting

Machinists use double-pass cutters to finish both female and male threads with minimal burrs.

Outer Thread Diameter Uses ±0.1mm Tolerance

Technicians verify thread diameters using digital calipers to ensure accurate tolerance for pressure sealing.

Thread Pitch Remains Consistent Across Batches

Quality control staff measure thread pitch at multiple points to prevent error from equipment drift.

Coupling Length Reflects Standard Engagement Depth

Design engineers calculate thread length to ensure the minimum 10-mm engagement required for sealing.

Injection Mold Draft Angles Avoid Seizing

Tooling experts build draft angles into thread molds to release the fittings without sticking during ejection.

Internal Stops Limit Over-Tightening

Manufacturers add internal shoulders that physically prevent threads from exceeding safe torque limits.