Designed for the Depths. Built for Reliability.
Offshore pipelines face extreme challenges: high pressure, corrosive seawater, dynamic fatigue, and seabed instability. GRB Spiral Steel Pipe is specifically engineered to meet these demands - delivering strength, durability, and safety for subsea and offshore applications.
Process
Coils, wires, and fluxes are tested for traceability.
Uncoiling, leveling, edge milling for precise bevel.
Strip is continuously coiled into pipe shape at set angle.
Inner and outer seams automatically welded for full wall fusion.
100% continuous ultrasonic scan of weld seam.
Plasma cut to length, optional mechanical expansion.
X-ray inspection of critical areas, manual UT re-check.
Each pipe individually pressure-tested.
Machined bevel for offshore girth welding.
Dimension check, marking, traceable certificate issued.
Key Features
High Strength & Toughness
Manufactured from premium hot-rolled coils using advanced spiral forming and double-sided submerged arc welding (DSAW). Provides excellent longitudinal and circumferential strength for high-pressure subsea transmission.
Superior Corrosion Resistance
Compatible with 3PE, FBE, and other anti-corrosion coatings, and designed for cathodic protection systems - significantly extending service life in marine environments.
Compliance with Offshore Standards
Fully conforms to API 5L, DNV-OS-F101, ISO 3183, suitable for subsea oil & gas pipelines, water injection lines, and riser systems.
Tight Dimensional Tolerances
Precise control over O.D., ovality, and end bevel geometry ensures efficient girth welding and reliable joint integrity during offshore lay operations.
Full Traceability & Quality Assurance
Complete material traceability from coil to finished pipe, with EN 10204 Type 3.2 inspection certificates available.
Typical Applications
Subsea oil & gas transmission pipelines
Platform risers and caissons
Offshore water injection lines
Deep-sea mining slurry transport
Port and offshore structural piling
Why Choose GRB?
Over 15 years of experience in offshore pipeline supply
Certified with ISO 9001, ISO 14001, ISO 45001 and major classification societies (DNV, ABS, BV, LR)
PQR and mill-batch supervision available upon request
Customizable lengths, wall thicknesses, and coating systems
Our address
The East of Chen Da Road, Daqiuzhuang, Jinghai, Tianjin, China
whatsapp Number
0086 18233409873
lucky@tjshenzhoutong.com
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