API 2B Structural Steel Pipe
API 2B Certified Structural Steel Pipe Manufacturer
Huayang Steel Pipe is an API authorized manufacturer with the official API Monogram license for steel pipe products under API Spec 2B.
API Spec 2B is a specification for the fabrication of structural steel pipe used in welded offshore structures and heavy-duty structural applications. The standard covers steel pipes manufactured from steel plates with longitudinal and circumferential butt welds, requiring strict control of welding procedures, inspection, dimensions, and mechanical performance.
With advanced LSAW pipe manufacturing technology, Huayang produces API 2B structural steel pipes widely applied in offshore platforms, jacket structures, foundation piles, tubular structures, and large-scale infrastructure projects.
API 2B Pipe Manufacturing Process
API 2B structural pipes are manufactured through submerged arc welding technology using steel plates as raw materials.
The production process includes:
| Process | Description |
|---|---|
| Steel Plate Selection | High-quality structural steel plate according to project requirements |
| Forming | Plate forming into cylindrical pipe shape |
| Longitudinal Welding | Submerged Arc Welding SAW |
| Circumferential Welding | Butt welding for required pipe length |
| Inspection | Dimensional inspection, NDT and mechanical testing |
| Final Acceptance | API 2B specification compliance verification |
Size and Manufacturing Process of API 2B Pipe
| Product Type | Manufacturing Process | Diameter Range | Wall Thickness | Length |
|---|---|---|---|---|
| API 2B Structural Pipe | LSAW / SAWL | Φ406 mm – Φ1422 mm | 7 mm – 50 mm | Customized |
| Large Diameter Structural Pipe | Longitudinal SAW | Up to project requirements | According to design | Customized |
API 2B Steel Grade
Huayang API 2B steel pipe is available with commonly used structural steel grades including:
| Standard | Steel Grade |
|---|---|
| API 2B | Grade 50 |
| API 2B | Grade 60 |
Equivalent grades can also be supplied according to customer specifications and project requirements.
API 2B Pipe Technical Requirements
| Item | Requirement |
|---|---|
| Standard | API Spec 2B |
| Product Type | Structural Steel Pipe |
| Pipe Type | Welded Steel Pipe |
| Welding Method | SAW Submerged Arc Welding |
| Pipe Shape | Round Structural Pipe |
| Weld Type | Longitudinal and Circumferential Butt Weld |
| Application | Offshore and Structural Engineering |
| Inspection | NDT, Dimensional Inspection, Mechanical Testing |
API 2B Steel Pipe Dimensions
| Parameter | Specification |
|---|---|
| Outside Diameter | Large Diameter Structural Pipe |
| Wall Thickness | Heavy Wall Thickness |
| Pipe Length | Single Length or Multiple Length |
| End Type | Plain End / Customized |
| Surface Treatment | Bare Pipe / Coating According to Requirement |
API 2B HFW / ERW Steel Pipe
In addition to large diameter LSAW structural pipe, Huayang also manufactures high-frequency welded steel pipes under API 2B steel pipe authorization.
Typical HFW/ERW production range:
| Diameter | Wall Thickness |
|---|---|
| Φ48 mm | 2.0–10 mm |
| Φ60 mm | 2.0–10 mm |
| Φ89 mm | 2.5–8 mm |
| Φ108 mm | 3.0–10 mm |
| Φ159 mm | 3.8–13 mm |
| Φ219 mm | 3.0–16 mm |
| Φ325 mm | 5.0–18 mm |
| Φ406 mm | 5.5–15 mm |
| Φ508 mm | 7.5–18 mm |
| Φ610 mm | 7.5–20 mm |
API 2B Quality Control
To ensure structural reliability, Huayang applies strict quality control procedures throughout production.
Main inspection items include:
- Chemical composition analysis
- Tensile testing
- Weld inspection
- Ultrasonic testing
- Hydrostatic testing
- Dimensional measurement
- Surface inspection
- Traceability control
All API 2B products are supplied with complete inspection records and quality documents.
Applications of API 2B Structural Steel Pipe
API 2B structural steel pipes are widely used in:
- Offshore oil and gas platforms
- Jacket structures
- Marine piles
- Foundation structures
- Bridge structures
- Heavy steel construction
- Large tubular frameworks
With API certification, advanced welding technology, and large-scale production capability, Huayang Steel Pipe provides reliable structural pipe solutions for global engineering projects.