... with EU RoHS certification R134a, R600a refrigerant Specifications(wire tube evaporator) Raw material1) Rolling welded steel pipe ... system (Three-capillary evaporator)Key processStraightening cutting, bending, welding wire, molding, assembly welding, leak testing, pre-treatment, electrophoresis ... Cathodic electrophoresis coating ≥72h; Powder paining≥200h copper wire tube evaporator for refrigerator