Blade Care on Shrimp Lines: Salt, Sand and Sanitation

Salt corrodes, sand grinds

Brine attacks the steel chemistry; shell grit and farm sand attack it mechanically. A deheading blade can show rust pits at the edge within days if rinse-down is skipped, and sand worn into the wash water turns every subsequent pass into lapping.

The practical defence is 440C for all edge contact, rinse and dry at shift end, and keeping wash-water tanks clean. None of this is exotic — it is just discipline, and it doubles edge life.

Sanitation chemicals eat edges too

Chlorinated and caustic cleaners keep the line food-safe, but a blade left soaking in them comes out with a matte, micro-pitted edge that drags instead of cuts. Dilution per the label, contact time per the schedule, then a clean-water rinse — the blade is steel, not a tank wall.

Stainless grades shrug off correct sanitation. What kills them is overnight soaking "just to be safe." Safe for the tank, poison for the edge.

A dull deheading blade costs more than it looks

When the deheading cut starts tearing instead of slicing, meat stays on the headshell — that is product walking out with the waste. On peeled and deveined grades, a dragging blade also scores the flesh, which shows up as downgrade at inspection.

Change on edge condition, not on the calendar. The moment heads show ragged meat or peels start leaving fragments, the whole set rotates to the grinder — not one blade, the set, because a mixed set cuts unevenly.

What we need to make your replacement set

Machine brand and model if the blades are OEM-shape, otherwise dimensions and edge profile from a used blade. Tell us your average shrimp size grade — the bevel for a 30-count line is not the bevel for a 60-count line.

One courier box with the worn set, and every dimension is on our granite plate the day it arrives.