1. Cleanliness：residual impurity inside ≤ 0.194mg/cm21.
2.Burst pressure: Not less than 49Mpa for brake hose and not less than 110Mpa for brake pipes.
3.Salt spray Test: No white rust for 72h, and no red rust for 96h.
Brake Pipe is consist of seamless steel tube, bolt joint, clamp. OD of tube include φ4.76、φ6、φ8 three specifications. Surface electroplating. We supply the goods by single tube packing.
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