Copper capillary pipes GOST 2624 are made of copper with a chemical composition according to GOST 859. The material for the production of these tubes - high-quality oxygen-free copper M0b or usual marks M1, M2, M3.
Subdivided capillary copper tubes in the group A and group B. Depending on which group metal varies scope: - Group A general-purpose tube, for instrumentation (working environment: air, oil, petrol). - Group B. Tube chokes between the evaporator and condenser in freezers (working environment: refrigerants). Pipes Group B produced by hot deformation or cold deformation with an internal diameter - from 0.6 to 0.85 mm; external diameter - of 1.4 to 2.1 mm. Requirements to be met by capillary tubes, copper group B. The product must not be deformed in bending by 90 degrees around a mandrel diameter of 3 mm (GOST 3728). The outer and inner surfaces must be free of scale, blistering, salts, cracks and other visual defects. Copper tubes should not be more than 1.7 mg of dry matter in its channel. Measuring the throughput capacity of the tubes are held at room temperature (GOST 9932). The ends of the tubes must be flattened over a length of 10 to 15 mm. Such tubes are delivered bays (over 100m), and measuring lengths of about 3 meters. Weight bays should not exceed 50 kg (in agreement weight can be increased), and the mass of the party shall be no more than 500 kg.