Description
| Standard: | API, ASTM, BS, DIN, GB, JIS |
| Certification: | API |
| Thickness: | 0.6 – 12 mm |
| Outer Diameter: | 19 – 273 mm |
| Alloy Or Not: | Non-alloy |
| OD: | 1/2″-10″ |
| Secondary Or Not: | Non-secondary |
| Material: | A53,A106 |
| Application: | Hydraulic Pipe |
| fixed length: | 6 meter,5.8meter |
| Technique: | Cold Drawn |
| Packaging Details: | in bundle,plastic |
| Delivery Time: | 20-30days |
Highlights at a glance
Hot Dip Galvanized Surface: Provides superior protection against corrosion.
Wide Range of Thicknesses: Available in various thicknesses (0.5-10mm).
Multiple Applications: Suitable for fluid pipes, gas pipes, and structural applications.
High-Quality Material: Made from Q195/Q235/Q345 steel for durability.
Application of 4 Inch Galvanized Steel Pipes in Firefighting Systems
The 4 inch galvanized steel pipe is a critical component in modern fire protection systems, widely used as the primary riser and distribution line for fire sprinkler systems and fire hydrant networks. Thanks to the robust hot-dip zinc coating, these pipes offer exceptional corrosion resistance, ensuring that the internal water flow remains unobstructed by rust or scale—a vital factor during emergency fire suppression.
Specifically designed to withstand high pressure, our 4-inch pipes comply with ASTM A53 and BS1387 standards, providing the structural integrity needed for both wet and dry pipe systems in high-rise buildings, industrial warehouses, and commercial complexes. The 4-inch diameter (approx. 114.3mm OD) balances optimal water flow volume with manageable installation weight, making it the industry standard for reliable, long-lasting fire safety infrastructure.
A: A standard 4 inch galvanized steel pipe has an outer diameter (OD) of 114.3 mm (4.5 inches). The wall thickness varies by schedule: Schedule 40 (Standard) is approximately 6.02 mm (0.237 inches), while Schedule 80 (Extra Strong) is 8.56 mm (0.337 inches). At SE Steel Pipe, we provide precise cutting and threading services to meet your specific project dimensions.
A: The 4 inch diameter is the industry “sweet spot” for fire protection risers because it provides high water flow capacity (GPM) with manageable hydraulic friction loss. The hot-dip galvanized coating prevents internal rust and scaling, ensuring that sprinkler heads never clog during an emergency. It meets the rigorous safety requirements of ASTM A53 and NFPA standards for commercial and industrial fire suppression.
A: The lifespan depends on the zinc coating thickness and soil acidity. In typical outdoor environments, a hot-dip galvanized pipe with a 60-80μm zinc layer can last 30 to 50 years. For underground burial in non-corrosive soil, you can expect 20+ years of service. For maximum longevity in harsh conditions, we recommend our pipes with a higher zinc mass (up to 600g/m²).
The surface of this pipe has been treated with brown paint and the section shape is round. This is a special pipe which belongs to API pipe category. Manufactured with A53,A106 materials which are non alloyed and non secondary. Our prodcuts have obtained international manufacturing standards such as API, ASTM, BS, DIN, GB, JIS and certified by API. Pipes are manufactured 0.6 – 12mm thickness, 19 – 273mm of outer diameter and have 6 meter,5.8meter fixed length. These pipes are mainly used as Hydraulic pipes in the industry.
