Straight Seam Welded Steel Pipe
Product Overview
|
Attribute |
Description |
|
Product Name |
Straight Seam Welded Steel Pipe |
|
Pipe Type |
Electric Resistance Welded (ERW), Submerged Arc Welded (SAW) |
|
Standard |
GB/T 3091-2008, GB/T 9711-1997, API 5L, ASTM A53, EN10217 |
|
Material |
Q195, Q235, Q345, L245-L555, X42-X80 |
|
Application |
Oil & Gas Transport, Structural Construction, Water & Slurry Pipelines, Offshore Platforms, Urban Infrastructure |
|
Key Features |
High weld integrity, uniform wall thickness, excellent straightness, suitable for coating and bending |
|
Manufacturing Process |
High-frequency welding (ERW) or double-sided submerged arc welding (DSAW) |
|
Origin |
China (Tianjin, Hebei, Shandong) |
|
MOQ |
1 ton or 1 set (customizable) |
|
Payment Terms |
T/T, L/C, Western Union |
|
Delivery Time |
7-20 days after order confirmation |
|
Certifications |
ISO 9001, API, SGS, CE, MTC Available |
Dimensions & Specifications
Straight Seam Welded Steel Pipe
|
Parameter |
Range / Value |
|
Outer Diameter (OD) |
ERW: 10-630 mm; SAW: 325-1600mm |
|
Wall Thickness (WT) |
ERW: 0.5-22 mm; SAW: 5-60mm |
|
Length |
5.8 m, 6 m (standard), up to 12 m (custom) |
|
Weight Calculation |
(OD mm - WT mm) × WT mm × 0.02466 = kg/m |
|
End Finish |
Plain End, Beveled, Threaded (customizable) |
|
Surface Treatment |
Anti-rust oil, varnish, 3PE coating, epoxy coal tar, galvanizing |
|
Tolerance |
OD: ±0.75%, WT: ±10% (per API 5L) |
Mechanical Properties (Typical Grades)
|
Property |
Q235 / L245 (Low Grade) |
Q345 / X42 (Medium Grade) |
X60-X80 (High Grade) |
|
Tensile Strength |
≥ 315 MPa |
≥ 415 MPa |
≥ 520 MPa |
|
Yield Strength |
≥ 235 MPa |
≥ 290 MPa |
≥ 420 MPa |
|
Elongation |
≥ 26% |
≥ 21% |
≥ 18% |
|
Impact Energy (0°C) |
≥ 27 J |
≥ 34 J |
≥ 40 J |
|
Hardness (HB) |
≤ 137 |
≤ 156 |
≤ 235 |
Typical Applications by Industry
|
Industry |
Use Case |
Example |
|
Oil & Gas |
Onshore/offshore pipelines, gathering lines |
Used in Siberian gas fields with 3PE anti-corrosion coating |
|
Construction |
High-rise building frames, bridge supports |
Applied in stadium trusses with Φ426×10mm SAW pipes |
|
Water & Wastewater |
Municipal water supply, sewage systems |
Installed in underground networks with epoxy-lined interior |
|
Power & Chemical |
Cooling water pipes, reactor supports |
Resists thermal stress below 300°C |
|
Marine & Offshore |
Platform legs, subsea structures |
DSAW pipes with X65 grade and ultrasonic testing |
Value-Added Services
|
Service |
Description |
|
Custom Cutting |
Pipes cut to specific lengths (e.g., 6m, 12m) |
|
End Processing |
Beveling, threading, grooving, deburring |
|
Coating Options |
3PE, FBE, epoxy coal tar, polyurethane, galvanizing |
|
Testing |
Hydrostatic test, ultrasonic inspection (UT), X-ray (RT), flattening, flaring |
|
Packaging |
Seaworthy export packing (wooden cases or bulk bundles) |
|
Certification |
MTC, third-party inspection (SGS/BV), NDT reports |
Global Market Fit
|
Region |
Suitability |
Notes |
|
Middle East |
High |
Ideal for desert and offshore oil projects |
|
Southeast Asia |
High |
Popular in LNG and urban infrastructure |
|
Africa & Latin America |
Medium-High |
Cost-effective solution for large-diameter pipelines |
|
North America |
Medium |
Requires API 5L certification for oil & gas use |
Export Reference: UAE Power Plant Project
|
Category |
Details |
|
Destination |
United Arab Emirates (UAE) |
|
Project Type |
Thermal Power Plant Construction |
|
Product Supplied |
Straight Seam Welded Steel Pipe |
|
Order Volume |
850 metric tons |
|
Key Specifications |
OD: 219.1mm (8"), WT: 8.18mm (SCH40), Length: 6m, Plain Ends |
|
Material Grade |
Carbon Steel (ASTM A53 Gr. B) |
|
Surface Treatment |
Black varnish (anti-rust coating) |
|
Certifications Provided |
MTC, ISO 9001, API 5L Compliance, NACE MR0175 Report |
|
Delivery Terms |
CIF Jebel Ali Port |
|
Shipment Schedule |
2 batches within 30 days |
|
Packaging |
Bundled with steel strips, plastic caps, seaworthy export packing |
|
Payment Method |
30% T/T in advance, 70% T/T Balance |
|
Client Feedback |
"High dimensional accuracy and timely delivery met our tight construction schedule" |
|
Outcome |
Positive review and long-term supplier status established |
