Hot-dip Galvanized Pig Fattening Pen

Lvlon makes pig farming equipment in Henan, China. The hot-dip galvanized fattening pen system ships to commercial swine operations across Southeast Asia, Africa and South America. In-house steel fabrication, welding and hot-dip galvanizing. Factory-direct pricing. Full OEM on panel dimensions, height, tube diameter and configuration.

80 Microns of Zinc: The Difference Between Replacing Pens and Forgetting About Them

Electroplated penning carries a zinc layer of about 8–15 microns. In a pig barn where ammonia runs 30–50 parts per million, humidity sits at 70–90% year-round, and pens get hosed down with water and disinfectant daily, electroplated tube welds show red rust within two to three years. The tubing rusts through around year five. The farmer replaces the pens. The old ones go to scrap.

Hot-dip galvanizing at 80 microns minimum works differently. The steel panels are welded into complete assemblies, then the entire assembly is immersed in molten zinc at roughly 450°C. At that temperature, the iron in the steel and the zinc react to form three intermetallic alloy layers-Gamma, Delta and Zeta-capped with a pure zinc outer layer called Eta. When corrosion attacks, it eats through the Eta layer first. Then the Zeta alloy layer takes over. Then Delta. Then Gamma. Each layer corrodes more slowly than the one above it. The total stack of 80 microns provides roughly 12–15 years of protection in pig housing conditions.

The weld zones get exactly the same treatment as the tube surface. Before galvanizing, the panels go through an acid pickling bath that strips weld slag and mill scale from every surface. The zinc bonds to the weld metal as thoroughly as it bonds to the parent tube. There is no weak spot where corrosion starts early.

A cheap electroplated pen gets replaced three times in 15 years. Each replacement costs the pen itself plus the labor, plus the downtime while pigs are moved out and back in. A hot-dip galvanized pen gets installed once and stays there through three full depreciation cycles of the building around it.

Modular Assembly: Today's Truck Delivery, Tomorrow's Pigs

Each pen panel arrives as a single galvanized unit weighing roughly 200 kilograms. The panel base plate has four anchor bolt holes. The vertical edges have connector plates pre-welded. On site, the crew drops anchor bolts into pre-set floor sleeves, positions the panel, tightens the base bolts, then bolts adjacent panels together through the connector plates. No welding. No cutting. No grinding. Two workers with an impact wrench install 30–40 linear meters of penning per day.

The speed matters because pig barns operate on biological schedules. A weaner batch arrives on a fixed date. The barn must be ready-pens installed, disinfected, dried-before that truck backs up to the loading dock. A penning system that takes two weeks to weld together on site costs the farmer one full batch cycle of production. A system that bolts together in two days costs nothing beyond the installation labor.

Once the pens are in, they function as more than barriers. They divide the barn into independently managed groups. Each pen holds animals of the same age and weight. The feed trough runs along the alley side-the stockperson fills it without entering the pen. The drinker sits at the opposite end-pigs walk back and forth between feed and water, getting exercise that improves muscle tone and meat quality. Cross-contamination between groups is physically blocked by the pen walls. If one group develops a respiratory infection, it stays in that pen.

Specifications

What Makes a Pen Work for the Pig and the Stockperson

Pen area per pig is the first number to get right. Under 0.8 square meters per finishing pig and stress behaviors escalate-tail-biting, flank-biting, reduced feed intake. Over 1.2 square meters and building cost per pig climbs without measurable performance gain. The optimum is roughly 1.0 square meters for pigs finished to 100–110 kilograms live weight.

Pen width matches the building's column spacing. If the pen wall lands on a structural column, the column becomes a vertical obstacle inside the pen that pigs rub against and eventually damage. Layout drawings start with the building grid, not the pen catalog.

The gap between horizontal tubes matters too. Nursery pens use narrower gaps to prevent small piglets from squeezing through into the next pen. Finishing pens can use wider gaps because the pigs are larger and the wider spacing reduces material cost. The factory sets tube spacing to match the age class of pigs the buyer specifies.

FAQ

Q: How can I tell hot-dip galvanized from electroplated penning just by looking?
Electroplated has a shiny, mirror-like finish. Hot-dip galvanized has a matte silver-gray surface, often with visible spangle (crystal patterns). Run a fingernail or a coin across it-hot-dip feels rougher. Sand a small spot-electroplated reveals bare steel almost immediately. Hot-dip reveals another gray layer underneath. The lifespan difference: electroplated lasts three to five years in a pig barn. Hot-dip at 80 microns lasts 12–15 years. The price difference is about 20–30% more for hot-dip. Over 15 years, electroplated gets replaced three times at roughly twice the total cost.

Q: Can the pen dimensions be customized to fit my existing buildings?
Yes. Measure the column spacing (center-to-center) and alley width of each barn. Send us the floor plan. We configure panel lengths and layout to match your building grid. Standard pen height is roughly 1.0–1.2 meters. Standard tube diameter is roughly Ø33–42 mm, with spacing adjusted per pig stage-narrower gaps for nursery, wider for finishing.

Q: What tools and skills are needed for installation?
An impact wrench for the bolts. A spirit level to check post verticals. A tape measure to verify spacing. Two workers. No welding. No special skills. The concrete floor should have pre-set anchor bolt sleeves cast in place or drilled and epoxied before the panels arrive. Floor flatness matters-a severely uneven floor needs self-leveling compound or localized shimming before the panels sit flush.

Q: What is the OEM minimum and customization scope?
Five panels minimum. Panel dimensions, height, tube diameter and spacing, color (powder coat over galvanizing optional) and brand labeling are all customizable. Standard off-the-shelf models ship in 10–15 working days. OEM orders add 15–20 working days.

Contact Lvlon for factory wholesale price, pen layout design and container quotation.