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1. Womic Steel: Manufacturing Capabilities & Company Strength
Womic Steel Group is a premier manufacturer and global exporter with over 20 years of expertise in producing carbon, alloy, and stainless steel tubular products. Our state-of-the-art SSAW pipe production facility spans a comprehensive manufacturing capability exceeding 15,000 tons per month for spiral submerged arc welded structural pipes, serving construction, infrastructure, and industrial projects worldwide.
Production Size Range for SSAW Structural Pipe: Outside diameter from 219mm to 3,000mm (8 inch to 120 inch) for SSAW process. Wall thickness from 5.0mm to 25.4mm. Single lengths from 6m to 18m standard, with custom lengths up to 60m available for deep foundation and structural projects.
Quality Certifications & Regulatory Compliance:
ISO 9001:2015 Certified: Quality Management System for structural pipe production and quality control processes, ensuring consistent product quality and continuous improvement across all manufacturing operations.
API 5L Monogram License: Womic Steel holds API 5L license for Line Pipe manufacturing, demonstrating our commitment to high-quality manufacturing standards.
CE Marking (PED 2014/68/EU): Our structural pipes comply with the European Pressure Equipment Directive (PED) 2014/68/EU. CE marking is available upon request.
EN 10204 3.2 Certification: In addition to standard 2.2 and 3.1 Mill Test Certificates, we supply products with Inspection Certificate 3.2, validated by EU-authorized third-party bodies.
Third-Party Inspection (TPI) Approvals: Our products and production processes are approved and audited by major international agencies including SGS, BV, TÜV, and DNV.
Additional Certifications Available: ISO 14001:2015, ISO 45001:2018
Global Recognition: Womic Steel is a trusted supplier to global EPC contractors, construction companies, and infrastructure developers, serving over 80 countries worldwide.
2. ASTM A500 GR.B: Material Composition & Performance Characteristics
ASTM A500 GR.B is the American standard specification for cold-formed welded and seamless carbon steel structural tubing in round shapes. The "GR.B" designation indicates Grade B, which offers a minimum yield strength of 315 MPa (46,000 psi) and minimum tensile strength of 400 MPa (58,000 psi). Grade B is the most commonly used grade for structural applications, offering an excellent balance of strength, weldability, and formability.
ASTM A500 GR.B is specifically formulated for structural applications, offering excellent weldability for field joining, good ductility for bending and forming, and sufficient strength for load-bearing structures. Compared to ASTM A252 piling grades, A500 GR.B has tighter dimensional tolerances and is designed for structural framing rather than driving applications.
Chemical Composition (Ladle Analysis, % by mass):
| Element | ASTM A500 GR.B (Max %) |
| C | 0.26 |
| Mn | 1.35 |
| P | 0.035 |
| S | 0.035 |
| Cu | 0.20 (when specified) |
Note: ASTM A500 GR.B has tighter limits on phosphorus and sulfur compared to ASTM A252, resulting in better weldability and toughness for structural applications.
Mechanical Properties (Room Temperature):
| Property | ASTM A500 GR.B |
| Yield Strength (min) | 315 MPa (46,000 psi) |
| Tensile Strength (min) | 400 MPa (58,000 psi) |
| Elongation (min) | 23% (for 50mm gauge) |
| Hardness (max) | 85 HRB |
Note: ASTM A500 GR.B offers higher elongation (23%) compared to piling grades, indicating better ductility for structural forming and bending.
Comparison of ASTM A500 Structural Tubing Grades:
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Typical Application |
| GR.A | 290 | 380 | Light structural applications |
| GR.B | 315 | 400 | General structural, building frames |
| GR.C | 345 | 425 | Heavy structural, high-load applications |
Note: For the most demanding structural applications requiring higher strength, ASTM A500 GR.C or ASTM A572 GR.50 should be considered.
3. Dimensional Range & Standards Compliance
Womic Steel supplies ASTM A500 GR.B SSAW structural pipes across a wide dimensional spectrum, fully compliant with ASTM A500 and related international standards. The SSAW (Spiral Submerged Arc Welded) process is ideal for large diameter structural applications.
| Item | Specification |
| Standard | ASTM A500 (GR.A, GR.B, GR.C) |
| Manufacturing Process | SSAW (Spiral Submerged Arc Welded) - 219mm-3,000mm OD |
| Outside Diameter Range | 219mm – 3,000mm (8" – 120") |
| Wall Thickness Range | 5.0mm – 25.4mm |
| Length Range | Standard: 6m, 12m, 18m / Custom: up to 60m |
| End Finish | Plain End (PE) / Beveled End (BE) |
| Surface Finish | Bare / Oiled / Black Coated / Primed / Galvanized |
| Tolerances | OD: ±0.5% / WT: ±10% / Length: +50mm -0mm |
4. Available Dimensions & Specifications - ASTM A500 GR.B SSAW Structural Pipe
SSAW Structural Pipe (219mm – 3,000mm OD)
| OD (mm) | Wall Thickness (mm) Options | Weight (kg/m) | Standard Length |
| 219 – 325 | 5.0, 6.0, 8.0, 10.0, 12.5 | 26.4 – 96.3 | 6m / 12m |
| 325 – 426 | 5.0, 6.0, 8.0, 10.0, 12.5, 14.0 | 39.5 – 142.2 | 6m / 12m |
| 426 – 530 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0 | 62.1 – 202.8 | 6m / 12m / 18m |
| 530 – 630 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0, 18.0 | 77.5 – 271.6 | 6m / 12m / 18m |
| 630 – 820 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0 | 92.3 – 394.6 | 6m / 12m / 18m |
| 820 – 1,020 | 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0 | 160.2 – 541.5 | 6m / 12m / 18m |
| 1,020 – 1,220 | 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 199.8 – 736.5 | 6m / 12m / 18m / 24m |
| 1,220 – 1,420 | 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 298.4 – 859.8 | 6m / 12m / 18m / 24m |
| 1,420 – 1,620 | 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 347.7 – 983.2 | 6m / 12m / 18m / 24m |
| 1,620 – 2,000 | 12.0, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 476.1 – 1,217.4 | 6m / 12m / 18m |
| 2,000 – 2,500 | 12.0, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 588.5 – 1,527.2 | 6m / 12m / 18m |
| 2,500 – 3,000 | 12.0, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 736.5 – 1,841.7 | 6m / 12m / 18m |
Note: Custom dimensions outside these ranges available upon request.
5. Common Structural Steel Standards Manufactured by Womic Steel
| Standard | Steel Grades | Typical Application |
| ASTM Structural Standards | ||
| ASTM A500 | GR.A, GR.B, GR.C | Cold-formed welded structural tubing |
| ASTM A501 | GR.A, GR.B | Hot-formed structural tubing |
| ASTM A252 | GR.1, GR.2, GR.3 | Steel pipe piles for deep foundation |
| ASTM A572 | GR.42, GR.50, GR.60, GR.65 | High-strength low-alloy structural steel |
| ASTM A36 | A36 | General structural carbon steel |
| EN Structural Standards | ||
| EN 10219 | S235JRH, S275JRH, S355JRH, S355J2H | Cold-formed welded structural hollow sections |
| EN 10025 | S235JR, S275JR, S355JR, S355J2 | Hot-rolled structural steel |
| Other Standards | ||
| AS 1163 | C250, C350, C450 | Australian standard structural hollow sections |
| CSA G40.21 | 44W, 50W, 50A | Canadian standard structural steel |
| JIS G3444 | STK290, STK400, STK490, STK540 | Carbon steel tubes for structural piling |
Usage: Building construction, bridge trusses, piling, marine foundations, industrial facilities, stadiums, exhibition halls, airport terminals, tower structures, mechanical supports, equipment platforms
6. Manufacturing Process - SSAW (Spiral Submerged Arc Welded) Structural Pipe
SSAW Manufacturing Process for Structural Pipe (219mm – 3,000mm OD):
Raw Material Inspection (Coil): Incoming hot-rolled steel coils are verified for chemical composition, mechanical properties, and surface quality against ASTM A500 GR.B specifications. Each coil is assigned a unique heat number to ensure full material traceability throughout production.
Uncoiling & Leveling: Steel coils are loaded onto the uncoiler and fed through a precision leveling machine to flatten the strip, removing coil set and ensuring uniform flatness for consistent spiral forming.
Edge Milling & Trimming: Both longitudinal edges of the steel strip are milled and trimmed to precise width tolerance (±0.5mm). The edge preparation creates a clean, parallel surface essential for high-quality spiral weld formation.
Spiral Forming: The leveled strip is fed into a spiral forming machine at a controlled helix angle. The strip is continuously formed into a spiral cylindrical shape, with the edges aligned for welding.
Inner Submerged Arc Welding (SAW): The inner spiral seam is welded first using automatic submerged arc welding equipment with appropriate flux and wire combination.
Outer Submerged Arc Welding (SAW): The outer spiral seam is welded immediately after the inner weld, using automatic submerged arc welding equipment.
Cutting to Length: The continuous spiral welded pipe is cut to specified lengths using automatic plasma or oxygen cutting systems.
Non-Destructive Testing (NDT):
100% Ultrasonic Testing (UT): Automatic UT system inspects the entire spiral weld seam and full pipe body for laminations, inclusions, lack of fusion, and other discontinuities.
Radiographic Testing (RT): X-ray or gamma-ray inspection of weld seam (spot or full length as specified).
Magnetic Particle Inspection (MPI): Inspection of weld toes and heat-affected zone for surface cracks.
Hydrostatic Testing (Optional): Available upon customer request.
End Finishing: Plain ends (square cut) or beveled ends (30°-35° bevel angle) as per customer specification.
Final Inspection & Marking: Visual inspection for surface defects, dimensional verification (OD, WT, length, straightness, roundness), and permanent marking per ASTM A500 (including grade, size, heat number, manufacturer identification).
Advantages of SSAW Process for Structural Pipe:
1. Ability to produce very large diameters (up to 3,000mm+) from standard width coils
2. Continuous production process for high efficiency
3. Cost-effective for large diameter structural applications
4. Good dimensional stability and roundness
7. Quality Control & Testing Procedures for ASTM A500 GR.B SSAW Structural Pipe
| Stage | Inspection Method | Purpose |
| Raw Material (Coil) | Chemical Analysis (OES Spectrometer) | Verify compliance with ASTM A500 composition limits |
| Raw Material (Coil) | Tensile Testing | Verify yield strength, tensile strength, elongation |
| Raw Material (Coil) | Ultrasonic Testing | Detect internal laminations and defects |
| In-Process | Dimensional Inspection (Micrometers) | Monitor OD, WT during spiral forming |
| In-Process | Edge Preparation Inspection | Verify edge condition and alignment |
| Weld Zone | Ultrasonic Testing (UT) - On-Line | Detect weld discontinuities, lack of fusion |
| Weld Zone | Radiographic Testing (RT) | Verify weld penetration, porosity, slag inclusion |
| Weld Zone | Magnetic Particle Inspection (MPI) | Surface crack detection (weld and HAZ) |
| Finished Pipe | Dimensional Inspection | Verify OD, WT, length, straightness, roundness |
| Finished Pipe | Hydrostatic Testing (Optional) | Verify pressure integrity |
| Finished Pipe | Guided Bend Test | Verify weld ductility and soundness |
| Finished Pipe | Flattening Test | Verify ductility and soundness of pipe body |
| Finished Pipe | Visual & Surface Inspection | Check for surface defects, laminations, cracks |
| Finished Pipe | Marking Verification | Ensure permanent marking per standard |
Quality Documentation:
1. Mill Test Certificate per EN 10204 Type 2.2, 3.1, or 3.2
2. Ultrasonic Test Report (weld and body)
3. Radiographic Test Report (if specified)
4. Dimensional Inspection Report
5. Traceability from heat number to finished pipe
8. Primary Applications - ASTM A500 GR.B SSAW Structural Pipe
ASTM A500 GR.B SSAW structural pipes are essential components in building construction, infrastructure, and industrial projects:
Building Construction: Columns, beams, bracing members, and trusses for high-rise buildings, commercial buildings, warehouses, and industrial facilities.
Bridge Supports: Bridge piers, abutments, and structural supports for highway and railway bridges.
Piling & Deep Foundation: Load-bearing piles for building foundations, bridge foundations, and industrial facilities.
Marine & Offshore Structures: Foundation piles for port structures, wharves, docks, and offshore platforms.
Stadiums & Exhibition Halls: Large-span structural members for stadium roofs, exhibition halls, and convention centers.
Airport Terminals: Structural supports for airport terminal buildings and hangars.
Tower Structures: Support structures for communication towers, transmission towers, and observation towers.
Industrial Facilities: Structural supports for factories, power plants, refineries, and processing facilities.
Mechanical & Equipment Supports: Structural supports for heavy machinery, equipment platforms, and industrial racks.
9. Packaging & Shipping - ASTM A500 GR.B SSAW Structural Pipe
ASTM A500 GR.B SSAW structural pipes are packaged and shipped with utmost care to ensure their protection during transit.
Packaging:
Protective Coating: Before packaging, pipes may be coated with anti-rust oil, primer, or left bare as required.
Bundling (Small Diameters): For smaller diameter pipes (typically below 610mm / 24"), pipes are bundled together in hexagonal or rectangular bundles secured with steel straps.
Individual Stacking (Large Diameters): For larger diameter pipes (above 610mm / 24"), pipes are handled and shipped individually with wooden dunnage or rubber padding.
End Caps: Plastic or steel end caps protect beveled ends and plain ends.
Shipping:
Mode of Transportation: Pipes are shipped via container vessels, bulk carriers, or rail freight.
Containerization (Small Diameters): For smaller diameter pipes (below 508mm / 20"), pipes are loaded into standard 20ft or 40ft shipping containers.
Bulk Vessel Loading (Large Diameters & Large Volumes): For large-volume orders, pipes are loaded directly into bulk carriers.
Flat Rack or Open Top Containers: For pipes exceeding standard container dimensions, flat rack containers or open top containers may be used.
Labeling and Documentation: Each bundle or individual pipe is clearly labeled with material grade, standard, dimensions, heat number, and handling instructions.
Customs Compliance: All necessary customs documentation is prepared.
Secure Fastening: Bundles and individual pipes are securely fastened to prevent movement during transit.
In summary, Womic Steel ensures that all ASTM A500 GR.B SSAW structural pipes are packaged with industry-leading protective measures and shipped using reliable transportation methods.
10. Womic Steel Advantages & FAQ - ASTM A500 GR.B SSAW Structural Pipe
Why Partner with Womic Steel for ASTM A500 GR.B SSAW Structural Pipe?
Complete Range of Sizes: SSAW process covering 219mm to 3,000mm OD, wall thickness up to 25.4mm, lengths up to 60m for structural and piling projects.
Structural Focus: Specialized experience in structural steel pipe applications for building construction, bridges, and industrial facilities.
Value-Added Services: End beveling, plain end cutting, protective coating (primer, galvanizing, FBE), and anti-corrosion wrapping.
Long Length Capability: Up to 60m single length for deep foundation and structural projects.
Competitive Logistics: Strategic partnership with global freight forwarders ensures cost-effective worldwide shipping.
Comprehensive Documentation: Full Mill Test Certificates (EN 10204 Type 2.2, 3.1, or 3.2), NDT reports, dimensional reports, and traceability documentation.
Choose Womic Steel Group as your reliable partner for high-quality ASTM A500 GR.B SSAW structural pipes for construction, infrastructure, and industrial projects worldwide. Welcome to inquire!
Website: www.womicsteel.com
Email: sales@womicsteel.com
Tel/WhatsApp/WeChat:
Victor: +86-15575100681
Jack: +86-18390957568
Frequently Asked Questions (FAQ) - ASTM A500 GR.B SSAW Structural Pipe
Q: What is the difference between ASTM A500 GR.B and ASTM A252 GR.3?
A: ASTM A500 GR.B has a minimum yield strength of 315 MPa, while ASTM A252 GR.3 has 345 MPa. A500 GR.B has tighter dimensional tolerances and is designed for structural framing. A252 GR.3 is specifically designed for piling and driving applications. A500 GR.B offers higher elongation (23% vs 20%), indicating better ductility for forming.
Q: Can ASTM A500 GR.B be used for piling?
A: Yes, ASTM A500 GR.B can be used for piling applications, particularly for lighter foundation requirements. However, for heavy marine and deep foundation piling, ASTM A252 GR.3 or EN 10248 S355GP is recommended due to their higher strength and driving-specific requirements.
Q: What is the maximum single length for ASTM A500 GR.B SSAW structural pipe?
A: Standard lengths are 6m, 12m, and 18m. Custom lengths up to 60m are available depending on diameter and wall thickness.
Q: What surface finish options are available?
A: We offer bare (mill scale), oiled, primed, black coated, hot dip galvanized, and various anti-corrosion coatings.
Q: Can you supply structural pipe with third-party inspection?
A: Yes. We facilitate inspections by SGS, BV, TÜV, DNV, or any client-nominated representative.
Q: What documentation is provided with each shipment?
A: Mill Test Certificate (EN 10204 Type 3.1), Dimensional Inspection Report, UT Reports, RT Reports (if specified), Traceability Documentation, Packing List, Commercial Invoice, and Certificate of Origin.
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