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Picking between galvanized pipe fittings and stainless steel pipe fittings can be hard. You need to understand what they’re made of, how they perform, and what they cost. Both are used a ton in pipes and industries. But they’re different in materials, rust defense, strength, and price. This guide will help you choose the best pipe fittings for your project.
Galvanized pipe fittings are often made from cast iron. They get a zinc coat through hot-dip or cold-dip galvanizing. This zinc acts like a guard. It keeps the metal below from rusting. If the coat gets scratched, the zinc rusts first. This protects the main metal.
But this guard isn’t forever. The zinc can’t fix itself. Once it’s damaged, the fittings wear out quicker. Also, they don’t do well in rough places, like by the ocean or with strong chemicals.
Stainless steel is a blend of metals with at least 10%–11% chromium, plus some nickel or molybdenum. It makes a special layer called a passive oxide film (chromium trioxide). This layer stops rust really well. If it gets scratched, it heals itself. This makes stainless steel much better at fighting rust, even in tough spots like salty water.
So, stainless steel is used in wet or harsh places, like food plants or hospitals.
Galvanized fittings are tough because of the cast iron. But the zinc coat doesn’t add much strength. They work okay for lots of simple jobs. However, they don’t last long in high-pressure or rusty conditions. Welding them is dangerous. It can let out bad zinc oxide fumes. Also, welding might harm the zinc layer. You’d need to re-coat it to keep it safe.
Stainless steel is stronger. Its tensile strength is 515 to 1300 MPa, depending on the blend. It’s tougher than galvanized fittings of the same size. It lasts longer in hard conditions. Welding needs careful work to avoid weak spots. But when done right, stainless steel keeps its awesome rust defense.
Galvanized pipe fittings are a budget-friendly choice. They use low-cost raw materials, ideal for cost-sensitive projects. Stainless steel costs more. The raw materials are pricey, and the process is trickier. The raw materials are pricey, and the process is trickier.
These are great for indoor pipes, drainage, or places with low rust risks. They’re common in building projects where harsh stuff isn’t a problem. You’ll find galvanized pipe fittings in water systems, fire protection, or gas lines.
If you need top-notch rust defense or a nice look, go with stainless steel. It’s a must for places like the sea, chemical plants, hospitals, or wet areas. Stainless steel pipe fittings are used a lot in coastal pipelines, chemical factories, or medical equipment.
Need reliable galvanized pipe fittings or stainless steel options from China? FLUIDOis a solid pick. They’ve been making steel valves, fittings, and flanges for over 20 years. They send products to 35+ countries.
FLUIDO offers lots of items, like forged pipe fittings, butt welding pipe fittings, ductile iron options, and stainless steel threaded types. Everything is tested well before shipping.
Reach out at info@fluidovalve.com for a free quote today!
