Humpback Furnace System - For SS Brazing

MOC: Stainless Steel

As per Requirements / Standard Optimised Dimesions

STANDARD OPERATING PROCEDURE (SOP)

Maximizing Life of Dyna-Tech Stainless Steel Foundry Tools

OBJECTIVE

To ensure long service life, consistent performance, and safe operation of Dyna-Tech stainless-steel foundry tools including pouring cups, skimmers, and funnels used for molten metal handling.

PROCEDURE STEPS

1. PREHEATING

• Always preheat the tool uniformly to 250–300°C before first contact with molten metal.
• Use a gas burner or furnace preheater to eliminate surface moisture and prevent thermal shock.
• Never dip cold tools directly into molten aluminium.

1. COATING APPLICATION

• Apply a non-wetting coating (TPT 120 or equivalent Boron Nitride-based coating) on all molten-metal contact surfaces (ID & OD).
• Use a brush or spray to achieve a uniform, thin layer.
• Allow proper drying or curing as recommended by the coating supplier before use.
• Reapply coating daily or whenever wear or metal sticking is observed.

1. INSPECTION BEFORE USE

• Visually check for cracks, deformation, oxide scaling, or missing coating before every shift.
• Replace any damaged tools immediately to prevent metal contamination or tool failure.

1. SKIMMING AND POURING PRACTICE

• Skim molten aluminium thoroughly before using any pouring or handling tool.
• Avoid dragging tools across the refractory floor; always lift and move smoothly.
• Maintain steady, controlled motion during pouring to minimize turbulence and metal splashing.

1. HANDLING AND PLACEMENT 

• Do not strike or scrape tools against the furnace or ladle walls.
• After use, place tools only on a heat-resistant stand or rack, never on a concrete or wet floor.
• Avoid contact with water or cool surfaces when hot.

1. CLEANING AFTER EACH SHIFT

• When tools are warm (not hot), remove oxide or dross build-up using a soft wire brush or scraper.
• Do not grind or hammer the surface — this damages the protective coating and shortens tool life.
• Inspect coating condition and reapply if dull or worn.

1. STORAGE

• Store tools in a dry, covered area free from moisture, flux residues, or corrosive vapours.
• Hang skimmers and smaller tools vertically; keep larger ones on wooden or insulated racks.
• Never stack tools directly on each other without separators.

1. PERIODIC MAINTENANCE

• Perform a detailed inspection every week for wear, surface oxidation, or joint looseness.
• Recoat or refurbish as required.
• Record maintenance activity in the foundry tool log for traceability.

SAFETY PRECAUTIONS

⚠️ Always wear appropriate Personal Protective Equipment (PPE): ⚠️

• Face shield
• Heat-resistant gloves
• Leather apron
• Safety shoes
• Arm guards for extended pours