Steel studded tubes are used instead of finned tubes for heat transfer in the petrochemical industry, generally in furnaces and boilers where the surface is exposed to a very corrosive environment and where very dirty gas streams require frequent or aggressive cleaning.
The steel studs are automatically resistance welded to the tube, producing high quality forge welds. Our automatic studding machines are capable of handling tube diameters from 38mm to 273 mm(1.5" to 10") o/d and stud diameter from 6mm~25.4 mm(0.23" to 1").
The welding process enables the combination of any grades for studs and tube: carbon, alloy, stainless steels and high nickel alloys. Alloy steel pipes are stress-relieved after studding, according to the relevant specifications for the class and grade of steel used.
Total four(4) PLC automatic ERW studding lines, monthly production capacity is 5,000,000 studs in total.
The automatic stud feeder was developed by our engineers combining both our large experience manufacturing extended surface and the most modern control technology available in the market. The technology has benefited us with more efficient production and consistent welding quality.
Dimension and Material
The following table shows Simcan’s manufacturing capabilities:
Tube Wall Thk.:
Cylindrical, Elliptical, Lens type
Stud to tube surface angle:
Vertical or angular
* This table is used as a general guide to our capabilities, please contact us for any other customized cases.
Codes and Standards
As per drawings and client’s Requirements
Surface Treatment and Protection
Each tube and stud except stainless material will be polished by polishing machine to near white condition before welding.
After welding, the studded tubes will be coated with anti-rust oil for transportation and site storage purpose, normally the coat will provide a period of 3 months prevention, any other coating material for longer prevention is also available as per clients’ requirements.
Each package is designed and made according to seaworthy packing standard and clients’ handling and lifting capability.
Studded tubes will be packed into steel frameworks and wrapped with weather proof PE film and plywood board covering up. In addition, each row of studded tubes will be isolated from adjacent with plywood bar to prevent rigid impact during transportation. For all exporting packages, we only use plywood instead of wood for fumigation free purpose.
As a professional supplier, Simcan does not only manufactures products but also has full capability on preparing and submitting documents as listed below but not limited to:
Design and Fabrication Schedule
Drawings and data
Fabrication Procedures including WPS, PQR
Inspection and Test Plan (ITP)
Daily, weekly or monthly progress report
A complete set of final archive including
Raw Material Mill Certificates
Product Conformity Certificate
Inspection Reports including Material Receipt Inspection Report, Test Report etc.
Test report by world reputable third party such as TÜV, BV, SGS, Lloyd's, ABS, Intertek(Moody), Shanghai Jorson etc. if any
Packing List and Proforma Invoice
Certificate of Origin or any other documentation mandatory for clients’ customs clearance or tax preference
Simcan's studded tubes are generally installed in the convection sections and boilers where the surface is exposed to a very corrosive environment and where very dirty gas streams require frequent or aggressive cleaning，especially applied for the fire heaters those firing heavy oil fuel.
|Delayed coker-Convection section-studded tubes||VDU-Convection section-studded tubes|