2.Atmospheric pressurs and hydraulic test:hydraulic tests have been experimented to pressure hoses one by one,under stated pressure value within a time not less than 5 seconds,No leakage being found routine supplied hydraulic pressure test is 2.45MPa,and atmospheric pressure test is P=0.95 MPa.

3.Corrosion test:corrosion-resistance test have been experimented to be the supplied industrial corrosionsteel pipes esactly in conformity with the standard stipulation or corrosion measures agreed upon by both parties and no tendency of intercrystalline corrosion is permitted.

4.Technical performances test:flattening test,tensile test,impact test,flaring test,hardness test,metallogragphic test,bending test,nondestructive inspection(including eddy current test,X ray and ultrasonic test).