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SSAW Steel Pipe

Quick Summary for Procurement: High-strength, cost-effective large-diameter steel pipes for water, oil, gas, and structural piling. Fully customizable in outer diameter (219mm – 3048mm) and wall thickness, with factory-applied 3PE/FBE anti-corrosion coatings. Fully compliant with API 5L, ASTM A252, AWWA C200, and EN 10217.

Product Description

I. Key Specifications & Manufacturing Capabilities

When selecting SSAW steel pipes for international infrastructure or oil & gas projects, technical parameters determine long-term performance and compliance. Below are our standard manufacturing tolerances and capabilities:

Parameter	Standard Capability / Specification
Outer Diameter (OD)	219.1 mm – 3048 mm (8″ – 120″)
Wall Thickness (WT)	5.0 mm – 25.4 mm (SCH 20 – SCH 160 / STD / XS)
Length Options	5.8m – 12.0m (Fixed length) / 18.0m – 24.0m (Single/Double Random Lengths)
Steel Grades (API 5L)	PSL1 / PSL2: Grade B, X42, X46, X52, X56, X60, X65, X70, X80
Structural / Water Standards	ASTM A252 (Gr.1, Gr.2, Gr.3), AWWA C200, EN 10217-1, GB/T 9711, SY/T 5037
Anti-Corrosion Coatings	3PE / 3PP (DIN 30670), Single/Dual Layer FBE, Liquid Epoxy (AWWA C210), Coal Tar Epoxy
Pipe End Protections	Bevel ends ( $30^\circ - 35^\circ$ ), Square cut, Fitted with plastic end caps / steel rings

II. Primary Applications & Project Engineering Value

SSAW steel pipes are engineered for demanding environment applications where large volume, uniform pressure distribution, and structural stability are required.

1. Water Infrastructure & Municipal Engineering

Applications: City water supply mains, raw water transmission pipelines, sewage discharge, and desalination plants.
Key Advantage: Cost per meter is significantly lower than seamless or LSAW pipes for large diameters ( $>\text{DN}500$ ).
Engineering Standard: AWWA C200 / DIN 30670.
Recommended Coating: Internal food-grade liquid epoxy or cement mortar lining + External 3PE coating for underground burial.

2. Oil & Gas Onshore and Offshore Pipelines

Applications: Long-distance natural gas transmission, crude oil trunklines, and slurry transport systems.
Key Advantage: High resistance to hoop stress due to the spiral seam angle, offering balanced stress distribution under high internal operating pressure.
Engineering Standard: API 5L PSL2 (X52 through X70).
Recommended Coating: Single or Dual-layer FBE / 3PE anti-corrosion coating.

3. Deep Foundation & Heavy Structural Piling

Applications: Port and jetty construction, bridge pier foundations, offshore wind turbine jacket piles, and high-rise building support columns.
Key Advantage: SSAW pipes can be produced in ultra-large diameters with long continuous lengths, reducing field welding joints on site.
Engineering Standard: ASTM A252 Grade 3 / EN 10219.

III. Why Choose SSAW Pipes over LSAW or Seamless Pipes?

Understanding the tradeoff between pipe types helps procurement managers optimize project budgets without sacrificing structural integrity:

Feature / Comparison	SSAW Pipe (Spiral Welded)	LSAW Pipe (Longitudinal)	Seamless Pipe (SMLS)
Production Cost	Lowest (High yield rate)	High	Highest
Diameter Range	Medium to Ultra-Large (up to 3m+)	Medium to Large	Small to Medium (usually $\le 24"$ )
Wall Thickness	Medium (up to 25.4mm)	Very Thick ( $>25.4\text{mm}$ )	Medium to Heavy Wall
Delivery Time	Fast (Continuous coil process)	Moderate	Moderate to Slow
Best Used For	Water mains, long-distance gas lines, piling	High-pressure off-shore oil/gas	Extreme high-pressure & temp boilers

IV. Quality Control & Inspection Standards (MTC 3.1)

To ensure zero-defect delivery for international projects, every length of SSAW pipe undergoes rigorous Mill Testing and Quality Control:

Hydrostatic Testing: Every single pipe is tested to 100% hydrostatic pressure according to API 5L / AWWA C200 standards before coating.
Non-Destructive Examination (NDE):
- 100% Online Ultrasonic Testing (UT) for weld seam defects.
- Radiographic Testing (X-Ray / RT) for pipe ends and repaired seams.
Dimensional Checks: Out-of-roundness, wall thickness, pipe length, bevel angle, and straightness verification.
Coating Inspection: Holiday testing (pinhole detection), adhesion pull-off testing, and coating thickness measurement.
Documentation: Full EN 10204 3.1 Mill Test Certificates (MTC) provided with complete heat number, chemical composition, and mechanical test results (tensile, yield, impact test). Third-Party Inspections (SGS, BV, Intertek, TUV) welcomed.

V. Packaging, Container Loading & Ocean Logistics

Proper packaging and loading prevent costly damage during ocean transit (especially under break-bulk shipping or multi-country transshipment):

Pipe End Protection: Plastic internal plug caps or steel protective rings wrapped with stretch film to prevent bevel damage and rust.
Container Shipping Optimization:
- 20ft GP Container: Pipe lengths controlled at 5.80 meters for smooth loading and unloading.
- 40ft GP/HC Container: Pipe lengths controlled at 11.80 meters.
- Nesting Strategy: Smaller diameter pipes nested inside larger diameter pipes to minimize ocean freight costs per metric ton.
Break-Bulk Cargo: For large volume or oversized diameter orders ( $>28"$ ), pipes are secured with PET/Steel strapping, lifting belts, and wooden dunnage to avoid deformation during loading/unloading at ports.