This test is used to detect hidden flaws, in homogeneties, cracks etc. using the test procedure described in ASTM E-426. Flaw Mark detector with digital data recorder is used for testing length of the tube.
EDDY CURRENT TEST
If asked by the customer, pipes are subjected to Ultrasonic testing. An acoustic transmitter probe generates a sound beam which is applied to test piece using oil as couplant. The Ultrasonic Test Equipment is calibrated using a reference test piece which artificial test which is from the same pipe lot that is to be tested. The tested tubes are considered flawless if they do not cause any indications longer than that produce by the reference test piece. The Ultrasonic Test is conducted as described in ASTM E 213/A-450.
All tubes and pipes produced are compulsorily subjected to 100% hydro testing. Hydrostatic Testing can be carried out at pressures un to 450kg/cm sq. The test pressure is achieved using high pressure triple plunger pumps.If specified, customers or their deputed inspection agencies can witness 100% hydro testing at our plant. For thin wall tubes Pneumatic Testing (Air under water) is done at 300 psi max. Air pressure.
METALLURGICAL INVESTIGATION & CORROSION TESTING TEST
Stainless steel tubes are tested for micro structure, carbide precipitation and grain size using metallurgical microscope. Corrosion testing is conducted as per ASTM-A-262, practice A,B,C,E as required by the users.
All products at Maven Stainless are subjected to 100% visual inspection.