Round Flange Welding Machine SBYFLHJ‑50

Specifications, applications and operation

Specification breakdown. The Round Flange Welding Machine SBYFLHJ‑50 handles material thicknesses of 2–5 mm, requires 100 kW, with overall dimensions of 1000×1000×2000 mm, and weighs approximately 500 kg, requires 380V/50Hz/3PH.

Typical applications. Round flange machines produce the bolted angle iron rings that connect spiral duct sections, particularly for industrial dust collection, kitchen exhaust and material handling installations where higher pressure ratings or service-removable joints are specified. Typical buyers include spiral duct fabricators, dust extraction system OEMs and industrial maintenance contractors who need to make custom flanged spiral duct on demand.

How it works. Round flange machines roll angle iron stock into a circular ring that matches the outside diameter of the spiral duct it will join. Bolt-hole punching is performed in a separate operation (or on a combined forming-and-punching line for higher-volume work). The finished flange is welded or riveted to the spiral duct end and provides a bolted, gasketted joint that is service-removable.

Quality, certification and after-sales. Like every machine in the SBKJ catalogue, this unit is built to ISO 9001:2015 quality management standards and CE marked for European conformity. The factory in Jiangyin, Jiangsu has been operating since 1995 and SBKJ holds 60+ invention and utility patents in HVAC ductwork machinery design. Each machine ships with a 12-month warranty on mechanical and electrical components, lifetime spare-parts availability, and 3–7 days of on-site installation supervision and operator training by an SBKJ engineer. Remote support is available via WhatsApp and email, with engineer response within 12 hours and technical troubleshooting within 72 hours.

Where this fits in your workshop

Welding machines on a duct line cover three distinct jobs: longitudinal seam welding for spiral or rolled tube, circumferential welding for flange-to-duct attachment on heavy industrial duct, and stitch welding for stainless food-grade or chemical-resistant ductwork. The right machine depends on duct geometry, material and required leak class. SBKJ welding stations integrate with both the spiral duct line and the rectangular SBAL line as second-stage equipment, with fume-extraction provisions and operator screens included as standard.

Pre-purchase checklist

Use this list when you write the enquiry or when you compare two suppliers. Each line is something an SBKJ engineer will want clarified before quoting.

• Welding process — TIG for stainless, MIG for galvanised, laser for thin gauge
• Material thickness range and the gauges you need at full duty cycle
• Wire or rod feed compatibility with your local consumables supply
• Fume extraction connection for compliance with local OH&S rules
• Operator interface language and training requirements
• Power supply — some welders need a 415V dedicated feed

Operator and maintenance notes. The Round Flange Welding Machine SBYFLHJ‑50 is designed to be run by a single trained operator under normal conditions. Daily checks include lubrication of the forming rolls, inspection of the drive belts and chain tension, and a clean-down of the tool surfaces. Weekly checks add electrical cabinet inspection and a torque check on the main frame fasteners. SBKJ ships every machine with an English operator manual, a maintenance schedule and a recommended two-year spare parts kit. Operator training is included in the 7-day commissioning visit, and a refresher session can be booked at any time within the warranty period.