TUPY “Brazil” Galvanized Threaded Fittings
TUPY malleable iron fittings—marketed in Iran as the “Brazil” brand—are a long-standing benchmark for threaded systems. They are made from heat-treated malleable cast iron, hot-dip galvanized inside and out, supplied with precision BSP and NPT threads, and trusted on water, steam, gas and process lines for durable, leak-tight performance.
Brand introduction & manufacturing background
Founded in 1938 in Brazil, TUPY built a global supply network on precise iron casting and rigorous quality control. TUPY threaded fittings are known for consistent production quality, dimensional stability, standard-compliant threading and a thick, uniform zinc coating—making them a dependable choice from building services to oil & gas.
Technical specifications & build quality
- Body material: Malleable cast iron (MI) with controlled heat treatment for high strength and toughness.
- Corrosion protection: Full hot-dip galvanizing (internal/external) for humid and corrosive environments.
- Thread types:
- BSP (ISO 7-1 / EN 10226) — common in Iran and Europe.
- NPT (ASME B1.20.1) — preferred for North American-style systems and higher-pressure duties.
- Working pressure class: Typically Class 300; ~20 bar under nominal conditions (some smaller sizes up to ~25 bar).
- Temperature range: Reliable operation to ~300 °C with suitable sealant and correct installation.
- Thread quality: Clean, burr-free threads with controlled roughness for full engagement and tight sealing.
- Quality control: Routine hydro/pneumatic tests, dimensional checks, coating thickness checks, and visual inspection.
Standards & certifications
Aligned with major international references: EN 10242 (malleable iron fittings), ISO 7-1 / EN 10226 (BSP threads), ASME B1.20.1 (NPT threads). Series- and market-dependent certifications may include UL, ISO, ABNT, and others.
Key specifications (at a glance)
| Item | Value / Note |
|---|---|
| Body alloy | Malleable Iron (MI), heat-treated |
| Coating | Hot-dip galvanized, internal & external |
| Pressure class | Class 300 (~20 bar; small sizes up to ~25 bar) |
| Temperature range | Up to ~300 °C with proper sealing |
| Threads | BSP (ISO 7-1/EN 10226), NPT (ASME B1.20.1) |
| Size range | ¼″ to 6″ |
| Core items | Elbows 90°/45°, tees, couplings, reducers, nipples, street elbows, crosses, unions, caps |
| Applications | Water, steam, gas, compressed air, fire protection, building & industrial services |
Product range & sizing
A complete basket for threaded lines:
- Direction change: 90° & 45° elbows, street elbow (male–female) for tight spaces.
- Branching: Equal/reducing tees, crosses, unions for serviceable joints.
- Size transition: Reducers (R/Rp), reducing couplings, double-threaded nipples.
- Line closure: Male/female caps.
All items are available from ¼″ to 6″ in BSP or NPT to match the project’s thread system.
Brand advantages & differentiators
- Exceptional durability under pressure & temperature: Robust body, engineered alloy and precision threads sustain steam, hot water and compressed air duty.
- Reliable sealing: Controlled thread roughness and uniform zinc reduce leak risk.
- Uniform galvanizing: Excellent atmospheric and mild-chemical resistance; suitable outdoors, in humid zones, and for potable water lines.
- Made in Brazil: Lot-to-lot consistency and reliable traceability.
- Full portfolio: Simplifies procurement and reduces multi-brand mixing.
Applications
Potable water networks, pump stations and treatment; heating/cooling plants (boilers, heat exchangers, headers); oil, gas & petrochemical (instrument branches, plant utilities); building services & fire protection (risers, threaded sprinkler networks); agriculture & greenhouses (irrigation, misting).
Choosing between BSP and NPT
- BSP (Iran/Europe): Readily available and compatible with locally common galvanized pipe.
- NPT (American system): Tapered profile with deeper engagement—often preferred for higher-pressure lines or NPT-based equipment.
Note: Never mix BSP and NPT in one joint; it damages threads and leads to leaks.
Installation & sealing tips
Use high-quality PTFE tape or pipe dope & flax per the sealant maker’s instructions; ensure clean, dry threads. Control tightening torque—over-torque can cause hairline cracks, thread crush and delayed leakage. Brush threads gently to remove debris and keep chips out of the line. Perform hydro/pneumatic testing per safety procedures. For steam/hot water, add flexible connectors or expansion loops to absorb thermal growth.
Fluid compatibility & operating notes
- Potable water: Zinc layer isolates water from iron—suitable for hygienic lines.
- Natural gas & compressed air: Safe choice with standard threads and proper sealing.
- Corrosives: For strong acids/alkalis or very high temperatures, verify chemical compatibility—special alloys or linings may be required.
- Coastal environments: Galvanizing helps; schedule periodic inspections where salt spray is severe.
Market comparisons (summary)
- vs. MECH: TUPY typically offers thicker walls and more uniform coating—preferred for critical service; MECH is often used on lighter-duty jobs.
- vs. generic Chinese fittings: Basic-grade alternatives; lower durability and pressure/temperature margins—not recommended for mission-critical lines.
- vs. Georg Fischer (+GF+): Both are top-tier; +GF+ can be harder to source at times. TUPY is a quality peer with broader availability in many markets.
Selection guide (size, pressure & thread)
Define fluid and temperature/pressure; if working near limits, select conservatively. Keep the thread system uniform (BSP or NPT). Place unions at service points. Minimize fittings—especially back-to-back elbows—to reduce pressure drop. In vibrating runs, add proper supports to protect joints.
How to identify genuine TUPY
Cast-in marks “TUPY/ BRASIL”, size, and sometimes pattern codes. Uniform galvanizing without runs or dark blotches; internal surfaces coated. Clean, undamaged thread starts; damaged threads will leak. Printed cartons, labeled specs, batch/heat codes for traceability. Valid documents from the supplier (invoice, test certificates when needed).
Storage, handling & safety
Store dry and covered to avoid white rust (aesthetic only in most cases). Avoid impacts; hairline cracks can fail under pressure. Test for leaks at commissioning and record results. For gas/steam, follow national codes (training, ventilation, emergency shut-off, etc.).
Quick Pick (fast selection)
| Application | Thread choice | Sealing tip | Execution note |
|---|---|---|---|
| Potable/cold water | BSP | High-quality PTFE tape | Keep chips off threads |
| Hot water / light steam | NPT or BSP with proper dope | Temperature-rated dope + flax | Control torque & add supports |
| City gas | BSP (per local code) | Gas-rated pipe dope | Soap-test & leak check after install |
| Compressed air | NPT/BSP | PTFE tape | Add drains & filters |
| Humid/coastal areas | BSP/NPT | PTFE tape | Periodic inspection of coating |
About Tamambaha
Tamambaha is a reputable, authorized supplier of TUPY (“Brazil”) galvanized fittings, offering a complete range in BSP and NPT from ¼″ to 6″, with product authenticity, pre-sale technical advice, integrated sourcing, and responsive after-sales support. Tamambaha is not the only source in the market; buyers can evaluate multiple suppliers based on project needs and timelines.
