EP Tubes (electrolytic tubes)

EP tubes has stable chemical property, high pressure-proof ability, high strength, low resistance, widely used in special gas systems,medical devices,semi-conductor and liquid crystal industry.

Mechanical Properties:can adjust HRB(75~580)figures、tensile properties and elongations.

Heat Treatment:Solution in reducing atmosphere

Precise BA tubes

BA Tubes before EP process

EP TUBES                                                                                                EP Tubes profile inner surface 

OD WT OD ID Roughness EP ID Roughness Straightness Concentricity Pressure Mpa
1/8″ (3.175mm) 0.020″∼0.028″ (0.51mm∼0.71mm) Ra0.50µm  ∼ Ra0.30µm ;the specific detail can be negotiated Ra0.3µm  ∼ Ra0.16µm ;the specific detail can be negotiated ≦0.7mm/M ±0.01mm 54.8
1/4″ (6.35mm) 0.035″∼0.039″ (0.89mm∼0.1.0mm) ≦0.7mm/M 34.3
3/8″ (9.53mm) 0.035″∼0.039″ (0.89mm∼0.1.0mm) ≦0.5mm/M 22.8
1/2″ (12.5mm) 0.039″∼0.0488″ (1.0mm∼1.24mm) ≦0.5mm/M ±0.02mm 24
5/8″ (15.88mm) 0.039″∼0.0488″ (1.0mm∼1.24mm) ≦0.5mm/M 21.2
3/4″ (19.05mm) 0.0488″∼0.065″ (1.24mm∼1.65mm) ≦0.5mm/M 17.6
1.0″ (25.4mm) 0.0488″∼0.065″ (1.24mm∼1.65mm) ≦0.5mm/M 15.


BA tubes Application:

—Water injection equipments

—Clean pipeline engineering

—High purity fluid transport

—Solar (cell) panel


Electrolytic polishing stainless steel seamless tubes




EP Tubes Process


BA tubes-bright annealing tubes: Manufacture process is double melt + cold rolled + bright annealing + clean processing

EP tubes-electrolytic polishing tubes:Electric polish BA tubes.

stainless steel EP seamless tubes