JIANGSU HAOHUA INDUSTRY GROUP

SMLS alloy steel studdes pipe for oil refinery

Studded Tubes are applied to convection chamber of heating furnace in petrochemical industry to increase the heat transfer coefficient at the fuming side. Studded Tubes are two or three times the square of light Tubes. Due to the usage of studded Tubes, the hot strength can be obtained as the same as radiation in the reasonable design. Studded Tubes manufactured by our company adopt resistance welding method. Welding process is controlled by PLC program. Feeding motor and graduation use servo motor. Studded number can be set via the human-computer interface. The graduation parameter and compensating coefficient can be set according to technical requirements to ensure the quality and precision of products.

Manufacturing process:

Studs are fully automatically welded onto the tube by resistance welding. 

Acceptance criteria

Approved drawings and the delivery conditions (TDC) of clients. 

Delivery condition

Tube ends are square cut, free burrs, internally dried and air blown clean, externally coated with varnish at both ends of extruded bimetallic fin tube.

surface Protection:

Oil dip, black coating or varnish. 

Type of Studs

Cylindrical or elliptical

Documentation

It shall include raw materials mill certificates, inspection and test samples results and warranty certificate of manufacturer.

Applications:

1. Furnace
2. Chemical
3. Petrochemical industry
4. Power station etc.