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PVC Type DB-120 Conduit – 280 mm (11″) | Heavy Duty Direct Burial

Saudi Ducts > PVC Type DB-120 Conduit – 280 mm (11″) | Heavy Duty Direct Burial

PVC Type DB‑120 Conduit – 280 mm (11″) | Heavy-Duty Direct Burial

 Heavy-Duty Direct Burial Electrical Conduit for Power, Telecom & Utility Infrastructure in KSA & Gulf Region

The PVC Type DB‑120 Conduit – 280 mm is a robust and rigid PVC conduit mainly used for underground cable installations with mechanical protection, corrosion resistance, and reliability for a long time. Its diameter of 280 mm is large enough to hold the highest capacity power, telecom, and fiber optic cables which makes it suitable for all kinds of infrastructure like residential, commercial, industrial, and municipal.

The DB‑120 grading guarantees thicker wall and better mechanical strength which can not only endure soil pressure and surface loads but also stress from the environment, all without needing a concrete encasement.

The PVC Type DB‑120 Conduit – 280 mm (11″) is a premium heavy-duty rigid PVC conduit designed for direct burial underground installations. Its DB‑120 classification guarantees maximum mechanical strength, durability, and corrosion resistance, making it ideal for high-capacity electrical, telecom, and fiber optic networks across Saudi Arabia, UAE, Qatar, Oman, Bahrain, and Kuwait.

With its large 280 mm diameter, this conduit supports multiple high-capacity cables, enabling future-ready utility expansions. Manufactured from high-grade rigid PVC, it is non-conductive, lightweight, and highly resistant to corrosion and environmental stress. Its design allows direct burial without concrete encasement, reducing installation costs and time while ensuring long-term reliability and safety.

The PVC Type DB‑120 Conduit – 280 mm is a robust and rigid PVC conduit mainly used for underground cable installations with mechanical protection, corrosion resistance, and reliability for a long time. Its diameter of 280 mm is large enough to hold the highest capacity power, telecom, and fiber optic cables which makes it suitable for all kinds of infrastructure like residential, commercial, industrial, and municipal.

The DB‑120 grading guarantees thicker wall and better mechanical strength which can not only endure soil pressure and surface loads but also stress from the environment, all without needing a concrete encasement.

The PVC Type DB‑120 Conduit – 280 mm (11″) is a premium heavy-duty rigid PVC conduit designed for direct burial underground installations. Its DB‑120 classification guarantees maximum mechanical strength, durability, and corrosion resistance, making it ideal for high-capacity electrical, telecom, and fiber optic networks across Saudi Arabia, UAE, Qatar, Oman, Bahrain, and Kuwait.

With its large 280 mm diameter, this conduit supports multiple high-capacity cables, enabling future-ready utility expansions. Manufactured from high-grade rigid PVC, it is non-conductive, lightweight, and highly resistant to corrosion and environmental stress. Its design allows direct burial without concrete encasement, reducing installation costs and time while ensuring long-term reliability and safety.

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Understanding DB‑120 Heavy Duty Classification

Based on wall thickness and impact resistance, PVC conduits are categorized. DB-120 conduits offer:

  • Complete securing for big size and high capacity cable
  • Resistance to earth pressure plus slight mechanical force
  • Direct burying installing without concrete
  • Utility project durability for a long time

Resulting in DB-120 conduits being the best fit for the Gulf area's high-capacity infrastructural needs.

Why PVC Is Ideal for Gulf Infrastructure

  • Corrosion & Chemical Resistance: Stands up to alkaline and saline soils
  • Thermal Stability: Keeps up performance during the hottest times
  • Electrical Safety: Insulator material
  • Lightweight & Easy to Install: Saves in labor and equipment costs
  • Longevity: Service life of 30-50+ years with little maintenance

Material Standards and Compliance

  • ASTM D1785 / D2241 – Rigid PVC conduit specifications

  • NEMA TC‑6 / TC‑8 – Conduit performance standards

  • IEC 61386 – International conduit standard

  • UL 651 / ETL (optional) – Electrical safety certification

Ensures consistent quality, safety, and durability for Gulf infrastructure projects.

Technical Specifications —DB‑120 280 mm Conduit

SpecificationDetails
Nominal Diameter280 mm (11″)
MaterialHigh-grade rigid PVC
TypeDB‑120 Heavy Duty, Direct Burial
InstallationDirect burial without concrete
Standard Lengths2 m, 3 m, 6 m
Joint TypeSolvent weld / Mechanical coupler
Operating Temp−10 °C to +60 °C
ColorGrey (standard)
StandardsASTM, NEMA, IEC, UL/ETL (optional)
Expected Service Life30–50+ years

Key Features & Performance Advantages

  1. Heavy-Duty Wall Construction – Mechanical strength of maximum level
  2. Large 280 mm Diameter – Offers great volume for very high capacity cables’ installation
  3. Smooth Interior Surface – Fast and trouble-free cable pulling
  4. Corrosion & Chemical Resistance – Very suitable for Gulf regions’ soil
  5. Non-Conductive – Guarantees electrical safety
  6. Direct Burial Ready – Concrete is not required
  7. Long Lifecycle – 30 to 50+ years and even more

Typical Applications

  • Residential & Commercial Projects – Power and telecom networks

  • Industrial Projects – Plants, factories, and refineries

  • Municipal Utilities – Smart city networks, street lighting, traffic systems

  • Telecom & Data Networks – Fiber optic and communication lines

How DB‑120 Direct Burial Systems Work

  • Trenches prepared for the purpose are where conduits are laid and heated glued or mechanically fastened are the ways of connecting them.
  • This system comprises of elbows, pulling eyelets, and warning tapes.
  • Soil pressure, moisture, and even minor mechanical impacts are kept away from the cables by this protection.

Installation Method – Step by Step

  1. Site Assessment & Trench Design – The route, depth, and alignment of the trench planned beforehand.
  2. Excavation – The trench is dug, and rocks and debris are removed.
  3. Bedding Preparation – A level surface of sand or soil is prepared.
  4. Laying Conduit Sections – Correct alignment and slope are assured.
  5. Jointing – Solvent weld or mechanical couplers are applied.
  6. Cable Pulling – Cables are pulled slowly, and lubricants might be applied if needed.
  7. Backfilling – Backfill is done in layers with light compaction.
  8. Installing Warning Tape – Future excavators are alerted.

Design Considerations for KSA & Gulf Region

  • Soil type, temperature, and salinity
  • Cable capacity and potential future expansion
  • Compliance with local regulations
  • Provision for future upgrading

Accessories & Fittings

  • Solvent Weld / Mechanical Couplers

  • 45° & 90° Elbows

  • Pulling Eyelets

  • Warning Tapes

  • Spacer Clips & Support Saddles

Performance in Harsh Soil & Climate Conditions

The PVC DB-120 280 mm conduit is perfect for:

  • The regions characterized by scorching hot desert climate and sandy types of soil.

    Soils having salt as a major component along the coast.

    Extremely heavy surface load with little protection from its effects.

Maintenance & Inspection

  • Inspect joints, fittings, and warning tapes during upgrades

  • Minimal maintenance due to PVC durability

  • Update as-built documentation

Cost Efficiency & Lifecycle Benefits

  • Direct burial eliminates need for concrete encasement

  • Lightweight and easy installation reduces labor cost

  • Long service life (30–50+ years) minimizes replacements

  • Supports future cable expansion

Comparison: DB‑120 vs DB‑100 vs DB‑60

FeatureDB‑120 280 mmDB‑100 280 mmDB‑60 280 mmSteel Conduit
Wall StrengthVery HighHighMediumVery High
Direct BurialYesYesLimitedYes
Corrosion ResistanceExcellentExcellentGoodPoor
Installation CostMediumMediumLowHigh
Service Life30–50+ yrs30–50 yrs20–30 yrs15–25 yrs

Conclusion

The PVC Type DB‑120 Conduit – 280 mm (11″) | Heavy Duty Direct Burial is designed to provide the ultimate mechanical strength, complete resistance to corrosion, and reliability for a long time. The conduit’s large diameter and heavy-duty construction make it suitable for the installation of high-capacity cables in residential, commercial, industrial, and municipal applications throughout the KSA and the Gulf region.

The choice of PVC DB‑120 280 mm conduit by engineers and contractors signifies the installation of low-cost, durable, and obsolete-proof infrastructure, which in turn grants long-term protection and safety to power, telecom, and fiber networks even in the most unfriendly Gulf environments.

Frequently Asked Questions

1. What is PVC DB‑120 280 mm conduit used for?
For high-capacity underground cable installations, including power, fiber optic, telecom, and industrial cables.

 

2. Can it be buried directly without concrete?
Yes. Its heavy-duty DB‑120 construction supports direct burial.

 

3. Difference between DB‑120 and DB‑100 conduits?
DB‑120 has thicker walls and higher mechanical strength for heavy loads; DB‑100 is medium-duty.

 

4. Is PVC DB‑120 280 mm suitable for Gulf climates?
Yes. Resistant to high temperatures, sandy and saline soils, and humidity.

 

5. Can fiber optic and telecom cables be installed?
Yes. Smooth interior allows easy, safe cable pulling.

 

6. Available lengths for DB‑120 280 mm conduit?
2 m, 3 m, and 6 m; can be joined using solvent weld or mechanical couplers.

 

7. Is PVC DB‑120 electrically safe?
Yes. PVC is non-conductive, ensuring safety.

 

8. Compatible fittings and accessories?
Solvent weld/mechanical couplers, elbows, pulling eyelets, warning tapes, spacers.

 

9. Expected service life?
Typically 30–50+ years depending on soil and installation quality.

 

10. Compliance with international and Gulf standards?
Yes. Meets ASTM, NEMA, IEC, and optional UL/ETL certifications.