PVC CNC Machining Service

Why Choose PVC

Broad Chemical Resistance at Low Cost

Rigid PVC (RPVC) resists concentrated acids, alkalis, salts, alcohols, and many solvents that would attack or degrade other plastics. For chemical handling equipment, laboratory fixtures, and industrial fluid systems, PVC delivers chemical resistance comparable to much more expensive plastics at a fraction of the cost.
Inherent Flame Retardancy

PVC contains chlorine, which inhibits combustion — standard PVC is inherently flame retardant without additives, passing UL94 V-0 in most formulations. This makes it the standard for electrical conduit, cable insulation, and electrical enclosures where flammability compliance is required.
Good Electrical Insulation

PVC has high dielectric strength and good volume resistivity — suitable for electrical terminal blocks, switchgear components, wire insulation, and any application requiring electrical isolation.
Low Cost

PVC is one of the lowest-cost engineering plastics — raw material and machining costs are both low, making it the economical choice for large chemical handling components, ductwork, and tanks.

Common PVC Grades

PVC-C (Chemical Grade)

Formulated for maximum chemical resistance — used for the most aggressive chemical environments including strong oxidizing acids.

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Our Machining Capability

We machine rigid PVC on CNC machining centers for chemical handling components, electrical parts, and fluid system fittings. PVC machines cleanly but generates hydrochloric acid fumes at elevated temperatures — we use appropriate ventilation and flood coolant to keep temperature below the degradation threshold. Tolerances held to ±0.05 mm.
Limitations & Cost Considerations

Rigid PVC softens at approximately 60°C continuous (CPVC extends this to 93°C) — not suitable for elevated-temperature chemical processing. PVC is brittle at low temperatures and should not be used below approximately -10°C in applications subject to impact. PVC degrades at machining temperatures if cutting generates excessive heat — proper coolant and cutting speed control are essential. Standard PVC is not suitable for UV-exposed outdoor applications without UV-stabilized grades — it yellows and becomes brittle.

FAQ

Is PVC resistant to all acids and chemicals?

PVC resists most acids (HCl, H₂SO₄, HNO₃ at moderate concentrations), alkalis, salts, and alcohols. It is not resistant to aromatic hydrocarbons (benzene, toluene), chlorinated solvents (MEK, acetone), and concentrated oxidizing acids at elevated temperature. Always verify chemical compatibility against a PVC chemical resistance chart for your specific process fluid.
Can PVC be used for outdoor applications?

Standard PVC is susceptible to UV degradation — it yellows and becomes brittle after prolonged outdoor exposure. UV-stabilized PVC grades are available for outdoor pipe and conduit applications. For precision outdoor plastic components with long service life requirements, UV-stabilized RPVC or HDPE is more appropriate.
What tolerances can you hold on machined PVC parts?

±0.05 mm as standard on rigid PVC. PVC has low thermal conductivity, so heat buildup during machining can cause localized expansion — we use flood coolant and conservative parameters to manage this. Tolerances below ±0.03 mm are more challenging due to PVC's thermal sensitivity during cutting.