To connect steel pipes with PVC pipes, use a steel-to-PVC transition fitting. Clean both pipes thoroughly with a solvent-wipe cloth to remove oils, dirt, or debris. Apply PVC solvent cement to the exterior of the steel pipe and the interior of the fitting. Insert the steel pipe into the fitting until snug, then hold in place for 30–60 seconds. Allow the cement to cure fully according to the manufacturer’s instructions, typically 24 hours. Avoid over-tightening to prevent damage.

The method relies on solvent cement forming a chemical bond between the two materials. Steel is rigid and conductive, while PVC is non-conductive and thermoplastic. Transition fittings bridge these differences by providing a compatible interface. Solvent cement reacts with both materials, creating a durable seal. According to the NationalPlasticsPipeInstitute (NPI), proper solvent cement application reduces leakage risks by 90% compared to mechanical fasteners. The InternationalPlasticsPipe协会 (IPPI) reports that improper connections cause 30% of PVC-steel failures due to poor surface preparation or incorrect curing. Additionally, the NationalElectricalCode (NEC) mandates non-conductive joints between metallic and non-metallic pipes to prevent electrical hazards. Solvent cement ensures compliance by isolating conductive surfaces. The NPDI also notes that using a 10:1 cement-to-water ratio maximizes bond strength, critical for handling pressure differentials between steel’s high承压 and PVC’s lower limits. This approach balances structural integrity and safety, adhering to industry standards for longevity and reliability.