GR3 Grade SSAW Steel Pipe
GR3 Grade SSAW Steel Pipe
Higher Strength · Superior Toughness
Multi-Coating Options: 3PE / 3PP / FBE / TPEP
Designed for medium-to-high pressure, large-diameter, and challenging environments, ourGR3 grade Spiral Submerged-Arc Welded (SSAW) steel pipesare combined with industry-leading 3-layer anti-corrosion coatings, delivering reliable and durable pipeline solutions for oil & gas, water, chemical, and structural projects.
Why Choose GR3 Grade?
Property | GR1 / GR2 | GR3 |
|---|---|---|
Min. Yield Strength | Lower | Higher (typically ≥ 325 MPa, per standard) |
Tensile Strength | Ordinary | Enhanced for high-pressure service |
Low-Temp Impact Toughness | Moderate | Significantly improved for cold regions |
Typical Application | Low-pressure, general service | Medium/high pressure, river/crossing, permafrost |
*Exact values refer to API 5L / ASTM / GB/T specifications.*
Product Specifications
Grade: GR3 (compliant with API 5L, ASTM A53/A106, GB/T 9711, etc.)
Process: SSAW - continuous weld seam, wide diameter flexibility
OD: 219mm - 2030mm
Wall Thickness: 8.1 mm-26.97mm
Length: 6m - 18m or as required
Coating Options for GR3 Pipe
Coating | Key Feature | Recommended GR3 Application |
|---|---|---|
3PE | 3-layer PE, mechanical strength, ≥50 years life | Buried oil/gas trunk lines, long-distance water |
3PP | Heat resistant (≤110℃), chemical resistance | Hot oil / district heating, chemical media |
FBE | Fusion Bonded Epoxy, high adhesion, no cathodic shielding | Critical sections requiring extreme coating adhesion |
TPEP | Smooth inner bore + impact-resistant outer layer | Large-diameter municipal water, long-distance raw water |
Typical Applications where GR3 Excels
Medium-to-high pressure long-distance natural gas pipelines
Oil pipelines crossing rivers, mountains, or permafrost zones
Large-scale industrial cooling water & chemical media
Bridge piles and offshore platform structural pipes
Quality Assurance
100% NDT of weld seam (UT / MT / RT)
Coating holiday detection, adhesion test, batch thickness check
Compliant with ISO 21809, DIN 30670, GB/T 23257, SY/T 0413, etc.
