Negin is a trusted Iranian manufacturer of pipes, fittings, and valves for municipal water, wastewater, pressurized irrigation, building services, industry, and urban infrastructure. A broad portfolio, stable quality, and reliable supply have built the brand’s reputation.
Negin Brand Overview
Negin focuses on durable, traceable pipes built to widely used national and international standards. From resin selection to extrusion, dimensional control, hydrostatic testing, and product marking, the quality loop is designed to serve public owners and private contractors. A wide choice of diameters, pressure classes, and materials lets engineers specify precisely for each scenario.
Product Range & Applications
Single-Wall Polyethylene (PE)
- Applications: Urban/rural water supply, agricultural water transfer, light industrial lines
- Features: Flexible, corrosion- and impact-resistant, fast installation with butt-fusion and electrofusion
- Typical Range: 20–630 mm, multiple pressure classes
Double-Wall Corrugated PE
- Applications: Gravity sewer networks, stormwater collection, drainage
- Features: Low weight, high ring stiffness (SN), practical choice for buried installations
U-PVC (for drainage and cold water)
- Applications: Building drainage, vent, risers, selected low-pressure lines
- Features: Smooth bore, light weight, easy joining with solvent cement and O-ring
Multilayer (PEX/AL/PEX) and PEX/PERT
- Applications: Domestic hot water, underfloor heating
- Features: Dimensional stability, suitable heat transfer, resistance to typical temperatures and pressures in MEP systems
Steel Pipe (black/galvanized)
- Applications: Firefighting, boiler rooms, selected industrial and building services
- Features: High mechanical strength, compatible with threading and welding
Fittings & Accessories
Electrofusion and butt-fusion fittings, mechanical couplers, tees, elbows, flanges, and reducers to complete transmission and distribution systems.
Key Technical Specifications
- Resins aligned with common industrial and water-supply grades (for PE in widely used classes)
- Multiple pressure classes to match project requirements
- On-pipe marking with OD, wall thickness, production date, and batch for traceability
- UV-stabilizing additives for open-air applications
- Periodic dimensional and hydrostatic tests per common quality methods
Quick Selection Guide — Negin Pipes (by application)
| Application | Recommended Material | Typical Size Range | Common Class / Pressure | Common Reference Standards |
|---|---|---|---|---|
| Urban/Rural Water Supply | PE | 20–225 mm | 6–16 bar | Widely used national water standards |
| Drip/Sprinkler Irrigation | PE | 16–110 mm | 4–10 bar | Common irrigation guidelines |
| Gravity Sewers | Double-Wall PE | 160–800 mm | SN4–SN8 | Widely used sewer network standards |
| Underfloor Heating/Hot Water | PEX/PERT/Multilayer | 16–32 mm | 10–20 bar (system) | Common MEP standards |
| Firefighting (Wet/Dry) | Steel/Galvanized | 1”–6” | 16–25 bar | Typical project fire codes |
Note: Values reflect typical market ranges. For final design, use each series’ data sheet and employer requirements.
Materials at a Glance
| Material | Advantages | Limitations | Key Uses |
|---|---|---|---|
| PE | Flexible, corrosion-resistant, fast installation | Sensitive to tight bending and improper cutting | Water, irrigation, light wastewater |
| Double-Wall PE | High ring stiffness, low weight, easy burial | Not intended for internal pressure | Gravity sewers, stormwater |
| U-PVC | Smooth bore, low weight, easy assembly | Limited service temperature, impact sensitivity in cold | Building drainage, vent |
| Multilayer/PEX | Temperature & pressure resistance for MEP | Requires compliant pressing tools | Hot water, underfloor heating |
| Steel | High strength, weldable/threadable | Corrosion and higher weight | Fire, boiler rooms, industrial |
Engineering Selection & Coordination
- Steps: (1) Define fluid, temperature, and installation environment → (2) Calculate flow and allowable velocity → (3) Select pressure class based on losses → (4) Match standards and employer specs → (5) Confirm accessories and joining method (electrofusion, butt-fusion, press, thread/weld).
- Goal: Optimize durability, ease of installation, maintainability, and availability of compatible fittings.
Installation, Storage & Operation
- Cutting & Prep: Use sharp, square cuts; for PE, bevel and clean before welding.
- Bending & Routing: Observe minimum bending radius (multiples of OD); avoid local kinks.
- Bedding & Backfill: Use graded bedding and layered compaction; remove sharp stones.
- Pressure Test: Perform staged testing per project procedure and remedy any leaks.
- Storage: Keep away from direct sunlight and heat; store PE coils on flat, clean surfaces free of metal burrs.
- Periodic Checks: Inspect joints, supports, and potential wear/leak points at direction changes.
Technical Documentation & Traceability
- Pipe Marking: Nominal diameter, wall thickness, batch, and production date for quality traceability.
- Shipment Documents: Dimensional/hydrostatic test reports for the production batch and packing list.
- Coordination: Verify item codes and technical specs against design documents before installation.
Why Negin Fits Civil & Building Projects
- Complete portfolio for water, wastewater, MEP, and industry
- Compatible with multiple joining methods for fast installation
- Ready access to common diameters and pressure classes
- Stable performance in typical operating conditions with reduced maintenance needs
Tamam Baha is one of the market distributors of Negin products. Teams can share project details (use, flow rate, pressure, installation environment) to receive technical advice, availability checks, and a well-matched mix of materials, sizes, and accessories aligned with design and schedule.
