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Oct. 31, 2019

Stainless Steel Thread Fittings is widely used in hydraulic pipeline systems of military industry, power, petrochemical industry, electric power, ships, cars, rail transit, construction machinery, mines, metallurgy, steel mills, marine engineering, and other industries.

Their raw materials include strip steel coil, welding wire, and flux. Before being put into operation, they must go through strict physical and chemical tests.

The end-to-end butt joint of the strip steel shall be welded by a single wire or double wire submerged arc welding, and automatic submerged arc welding shall be used for repair welding after being rolled into the steel pipe.



Before forming, the strip steel is a method of surface cleaning, conveying and edge bending treatment.

Electric contact pressure gauges are used to control the pressure of the oil cylinders on both sides of the conveyor to ensure the smooth transportation of the strip steel.

The weld gap control device is employed to ensure that the weld gap meets the welding requirements, and the pipe diameter, misalignment and weld gap are strictly controlled.

Both internal welding and external welding adopt American Lincoln electric welding machine for single wire or double wire submerged arc welding, so as to obtain stable welding quality.

All welded seams have been inspected by an on-line continuous ultrasonic automatic flaw detector to ensure 100% NDT coverage of spiral welds. If there is any defect, it will automatically alarm and spray the mark. The production workers can adjust the process parameters at any time to eliminate the defect in time.

In addition to the function of bending pipe, it can also remove bending pipe parts (oil cylinders) and use them as separate hydraulic jacking machines.

When cleaning the oil tank of the pipe bender, clean the oil inlet filter of each pump.

Within 1-2 months after the equipment starts to be used, the pipe bender a manufacturer shall clean the oil tank and filter the primary hydraulic tank.

All joints of hydraulic pump stations are equipped with oil-resistant rubber sealing rings. If the sealing ring is damaged or leaks oil, it shall be replaced in time.

Check the parts of the fastener, make it in the fastening state.

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